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Cover Page - shares	6 Months Ended
Cover Page - shares	Jun. 30, 2020	Aug. 03, 2020
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Jun. 30, 2020
Document Transition Report	false
Entity File Number	0-22462
Entity Registrant Name	GIBRALTAR INDUSTRIES, INC.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	16-1445150
Entity Address, Address Line One	3556 Lake Shore Road
Entity Address, Address Line Two	P.O. Box 2028
Entity Address, City or Town	Buffalo
Entity Address, State or Province	NY
Entity Address, Postal Zip Code	14219-0228
City Area Code	716
Local Phone Number	826-6500
Title of 12(b) Security	Common Stock, $0.01 par value per share
Trading Symbol	ROCK
Security Exchange Name	NASDAQ
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		32,423,220
Amendment Flag	false
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	Q2
Entity Central Index Key	0000912562
Current Fiscal Year End Date	--12-31

Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Income Statement [Abstract]
Net Sales	$ 285,814	$ 262,655	$ 535,253	$ 490,072
Cost of sales	213,556	199,097	406,608	382,614
Gross profit	72,258	63,558	128,645	107,458
Selling, general, and administrative expense	37,667	36,952	78,864	70,286
Income from operations	34,591	26,606	49,781	37,172
Interest expense	214	219	167	2,280
Other (income) expense	(1,787)	(13)	(1,595)	576
Income before taxes	36,164	26,400	51,209	34,316
Provision for income taxes	8,872	6,487	11,858	8,058
Net income	$ 27,292	$ 19,913	$ 39,351	$ 26,258
Net earnings per share:
Basic (in USD per share)	$ 0.84	$ 0.62	$ 1.21	$ 0.81
Diluted (in USD per share)	$ 0.83	$ 0.61	$ 1.20	$ 0.80
Weighted average shares outstanding:
Basic (in shares)	32,605	32,321	32,596	32,300
Diluted (in shares)	32,860	32,642	32,868	32,630

Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Other Comprehensive Income (Loss), Net of Tax [Abstract]
Net income	$ 27,292	$ 19,913	$ 39,351	$ 26,258
Other comprehensive income (loss):
Foreign currency translation adjustment	2,815	998	(3,083)	1,840
Minimum pension and post retirement benefit plan adjustments	18	12	36	24
Other comprehensive income (loss)	2,833	1,010	(3,047)	1,864
Total comprehensive income	$ 30,125	$ 20,923	$ 36,304	$ 28,122

- Definition

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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+ Details

- Definition

Amount after tax and reclassification adjustments of other comprehensive income (loss).

+ References

+ Details

Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents	$ 120,859	$ 191,363
Accounts receivable, net of allowance of $6,270 and $6,330	193,609	147,515
Inventories	79,058	78,476
Prepaid expenses and other current assets	22,849	19,748
Total current assets	416,375	437,102
Property, plant, and equipment, net	94,723	95,409
Operating lease assets	33,383	27,662
Goodwill	378,740	329,705
Acquired intangibles	110,481	92,592
Other assets	1,794	1,980
Total assets	1,035,496	984,450
Current liabilities:
Accounts payable	116,853	83,136
Accrued expenses	94,009	98,463
Billings in excess of cost	29,281	47,598
Total current liabilities	240,143	229,197
Deferred income taxes	40,022	40,334
Non-current operating lease liabilities	24,400	19,669
Other non-current liabilities	21,167	21,286
Shareholders’ equity:
Preferred stock, $0.01 par value; authorized 10,000 shares; none outstanding	0	0
Common stock, $0.01 par value; authorized 50,000 shares; 33,413 shares and 33,192 shares issued and outstanding in 2020 and 2019	334	332
Additional paid-in capital	299,829	295,582
Retained earnings	444,728	405,668
Accumulated other comprehensive loss	(8,438)	(5,391)
Cost of 993 and 906 common shares held in treasury in 2020 and 2019	(26,689)	(22,227)
Total shareholders’ equity	709,764	673,964
Total liabilities and shareholders' equity	$ 1,035,496	$ 984,450
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized (in shares)	10,000,000	10,000,000
Preferred stock, shares outstanding (in shares)	0	0
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	50,000,000	50,000,000

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Statement of Financial Position [Abstract]
Accounts receivable, allowance	$ 6,270	$ 6,330
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized (in shares)	10,000,000	10,000,000
Preferred stock, shares outstanding (in shares)	0	0
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	50,000,000	50,000,000
Common stock, shares issued (in shares)	33,413,000	33,192,000
Treasury stock, shares (in shares)	993,000	906,000

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Cash Flows from Operating Activities
Net income	$ 39,351	$ 26,258
Adjustments to reconcile net income to net cash (used in) provided by operating activities:
Depreciation and amortization	11,054	9,892
Stock compensation expense	4,171	6,091
Gain on sale of business	(1,881)	0
Exit activity costs, non-cash	346	0
(Benefit of) provision for deferred income taxes	(216)	278
Other, net	1,018	2,437
Changes in operating assets and liabilities, excluding the effects of acquisitions:
Accounts receivable	(25,842)	(41,156)
Inventories	5,661	13,464
Other current assets and other assets	1,996	(4,983)
Accounts payable	(1,732)	4,012
Accrued expenses and other non-current liabilities	(41,181)	(9,807)
Net cash (used in) provided by operating activities	(7,255)	6,486
Cash Flows from Investing Activities
Acquisitions, net of cash acquired	(54,385)	(264)
Net proceeds from sale of property and equipment	59	60
Purchases of property, plant, and equipment	(5,231)	(6,265)
Net proceeds from sale of business	704	0
Net cash used in investing activities	(58,853)	(6,469)
Cash Flows from Financing Activities
Long-term debt payments	0	(212,000)
Payment of debt issuance costs	0	(1,235)
Purchase of treasury stock at market prices	(4,462)	(3,149)
Net proceeds from issuance of common stock	78	208
Net cash used in financing activities	(4,384)	(216,176)
Effect of exchange rate changes on cash	(12)	1,035
Net decrease in cash and cash equivalents	(70,504)	(215,124)
Cash and cash equivalents at beginning of year	191,363	297,006
Cash and cash equivalents at end of period	$ 120,859	$ 81,882

Consolidated Statement of Shareholders' Equity - USD ($) shares in Thousands, $ in Thousands	Total	Cumulative Effect, Period of Adoption, Adjustment	Common Stock	Additional Paid-In Capital	Retained Earnings	Retained Earnings Cumulative Effect, Period of Adoption, Adjustment	Accumulated Other Comprehensive Loss	Treasury Stock
Balance, shares at Dec. 31, 2018			32,887					796
Balance, value at Dec. 31, 2018	$ 596,693		$ 329	$ 282,525	$ 338,995	$ 1,582	$ (7,234)	$ (17,922)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	6,345				6,345
Foreign currency translation adjustment	842						842
Minimum pension and post retirement benefit plan adjustments, net of taxes of $7	12						12
Stock compensation expense	2,371			2,371
Stock options exercised, shares			12
Stock options exercised	139			139
Net settlement of restricted stock units, shares			127					59
Net settlement of restricted stock units	(2,151)		$ 1	(1)				$ (2,151)
Balance, shares at Mar. 31, 2019			33,026					855
Balance, value at Mar. 31, 2019	605,833		$ 330	285,034	346,922		(6,380)	$ (20,073)
Balance, shares at Dec. 31, 2018			32,887					796
Balance, value at Dec. 31, 2018	596,693		$ 329	282,525	338,995	1,582	(7,234)	$ (17,922)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	26,258
Foreign currency translation adjustment	1,840
Balance, shares at Jun. 30, 2019			33,101					880
Balance, value at Jun. 30, 2019	629,547		$ 331	288,822	366,835		(5,370)	$ (21,071)
Balance, shares at Mar. 31, 2019			33,026					855
Balance, value at Mar. 31, 2019	605,833		$ 330	285,034	346,922		(6,380)	$ (20,073)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	19,913				19,913
Foreign currency translation adjustment	998						998
Minimum pension and post retirement benefit plan adjustments, net of taxes of $7	12						12
Stock compensation expense	3,720			3,720
Stock options exercised, shares			5
Stock options exercised	69			69
Net settlement of restricted stock units, shares			62					25
Net settlement of restricted stock units	(998)		$ 1	(1)				$ (998)
Balance, shares at Jun. 30, 2019			33,101					880
Balance, value at Jun. 30, 2019	629,547		$ 331	288,822	366,835		(5,370)	$ (21,071)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock Issued During Period, Shares, New Issues			8
Balance, shares at Dec. 31, 2019			33,192					906
Balance, value at Dec. 31, 2019	673,964	$ (291)	$ 332	295,582	405,668	(291)	(5,391)	$ (22,227)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	12,059				12,059
Foreign currency translation adjustment	(5,898)						(5,898)
Minimum pension and post retirement benefit plan adjustments, net of taxes of $7	18						18
Stock compensation expense	1,665			1,665
Stock options exercised, shares			3
Stock options exercised	24			24
Net settlement of restricted stock units, shares			193					80
Net settlement of restricted stock units	(4,184)		$ 2	(2)				$ (4,184)
Balance, shares at Mar. 31, 2020			33,388					986
Balance, value at Mar. 31, 2020	677,357		$ 334	297,269	417,436		(11,271)	$ (26,411)
Balance, shares at Dec. 31, 2019			33,192					906
Balance, value at Dec. 31, 2019	673,964	$ (291)	$ 332	295,582	405,668	$ (291)	(5,391)	$ (22,227)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	39,351
Foreign currency translation adjustment	(3,083)
Balance, shares at Jun. 30, 2020			33,413					993
Balance, value at Jun. 30, 2020	709,764		$ 334	299,829	444,728		(8,438)	$ (26,689)
Balance, shares at Mar. 31, 2020			33,388					986
Balance, value at Mar. 31, 2020	677,357		$ 334	297,269	417,436		(11,271)	$ (26,411)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	27,292				27,292
Foreign currency translation adjustment	2,815						2,815
Minimum pension and post retirement benefit plan adjustments, net of taxes of $7	18						18
Stock compensation expense	2,506			2,506
Stock options exercised, shares			6
Stock options exercised	54			54
Net settlement of restricted stock units, shares			15					7
Net settlement of restricted stock units	(278)		$ 0	0				$ (278)
Balance, shares at Jun. 30, 2020			33,413					993
Balance, value at Jun. 30, 2020	$ 709,764		$ 334	$ 299,829	$ 444,728		$ (8,438)	$ (26,689)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock Issued During Period, Shares, New Issues			4

Consolidated Statement of Shareholders' Equity (Parenthetical) - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2020	Mar. 31, 2020	Jun. 30, 2019	Mar. 31, 2019
Statement of Stockholders' Equity [Abstract]
Adjustment to pension benefit liability, taxes	$ 6	$ 7	$ 5	$ 4

Consolidated Financial Statements	6 Months Ended
Consolidated Financial Statements	Jun. 30, 2020
Organization, Consolidation and Presentation of Financial Statements [Abstract]
CONSOLIDATED FINANCIAL STATEMENTS	CONSOLIDATED FINANCIAL STATEMENTS The accompanying unaudited consolidated financial statements of Gibraltar Industries, Inc. (the "Company") have been prepared by management in accordance with U.S. generally accepted accounting principles for interim financial information and with the instructions to Form 10-Q and Article 10 of Regulation S-X. In the opinion of management, all adjustments consisting of normal recurring adjustments considered necessary for the fair presentation of results for the interim period have been included. The Company's operations are seasonal; for this and other reasons, such as the impact of the COVID-19 pandemic, financial results for any interim period are not necessarily indicative of the results expected for any subsequent interim period or for the full year. The accompanying unaudited consolidated financial statements should be read in conjunction with the financial statements and notes thereto included in our annual Form 10-K for the year ended December 31, 2019. The balance sheet at December 31, 2019 has been derived from the audited financial statements at that date, but does not include all of the information and footnotes required by U.S. generally accepted accounting principles for complete financial statements.

Recent Accounting Pronouncements (Notes)

6 Months Ended

Jun. 30, 2020

Accounting Policies [Abstract]

RECENT ACCOUNTING PRONOUNCEMENTS

Recent Accounting Pronouncements Adopted

Standard

Description

Financial Statement Effect or Other Significant Matters

ASU No. 2016-13

Financial Instruments - Credit Losses

(Topic 326)

The objective of this standard is to provide financial statement users with more decision-useful information about the expected credit losses on financial instruments and other commitments to extend credit, including trade receivables, held by an entity at each reporting date. The amendments in this update replace the incurred loss impairment methodology in current GAAP with a methodology that reflects expected credit losses and requires consideration of a broader range of reasonable and supportable information to inform credit loss estimates.

The standard is effective for the Company as of January 1, 2020. The Company adopted the amendments in this update using the modified retrospective approach through a cumulative-effect adjustment to retained earnings of $291,000, net of $96,000 of income taxes, on the opening consolidated balance sheet as of January 1, 2020. The Company's financial assets that are in the scope of the standard are contract assets and accounts receivables which are short-term in nature. Additionally, the Company has identified and implemented appropriate changes to the Company's business processes, policies and internal controls to support reporting and disclosures.

Date of adoption: Q1 2020

ASU 2018-15

Intangibles - Goodwill and Other - Internal-Use Software (Subtopic 350-40), Customer's Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract

The amendments in this update require an entity to apply the same requirements for capitalizing implementation costs incurred in a hosting arrangement that is a service contract as the entity would for implementation costs incurred to develop or obtain internal-use software. The accounting for the service element is not affected by the amendments in this update.

The standard is effective for the Company as of January 1, 2020. The Company adopted the amendments in this update using the prospective method of adoption, and the adoption did not have a material impact to the Company's financial statements.

Date of adoption: Q1 2020

Recent Accounting Pronouncements Not Yet Adopted

Standard

Description

Financial Statement Effect or Other Significant Matters

ASU No. 2019-12

Income Taxes (Topic 740), Simplifying the Accounting for Income Taxes

The amendments in this update simplify the accounting for income taxes by removing certain exceptions to the general principles in Topic 740 and improve consistent application by clarifying and amending existing guidance. The amendments of this standard are effective for fiscal years beginning after December 15, 2020, including interim periods within those fiscal years. Early adoption is permitted, including adoption in any interim period for which financial statements have not been issued, with the amendments to be applied on a respective, modified retrospective or prospective basis, depending on the specific amendment.

The Company is currently evaluating the requirements of this standard. The standard is not expected to have a material impact on the Company's financial statements.

Date of adoption: Q1 2021

Accounts Receivable and Allowance for Doubtful Accounts

6 Months Ended

Jun. 30, 2020

Receivables [Abstract]

ACCOUNTS RECEIVABLE AND ALLOWANCE FOR DOUBTFUL ACCOUNTS

Accounts receivable consists of the following (in thousands):


	June 30, 2020		December 31, 2019
Trade accounts receivable	$	175,251	$	133,238
Costs in excess of billings	24,628		20,607
Total accounts receivables	199,879		153,845
Less allowance for doubtful accounts and contract assets	(6,270)		(6,330)
Accounts receivable	$	193,609	$	147,515

Refer to Note 4 "Revenue" concerning the Company's costs in excess of billings.

The Company is exposed to credit losses through sales of products and services. The Company’s expected loss allowance methodology for accounts receivable and costs in excess of billings (collectively "accounts receivable") is developed using historical collection experience, current and future economic and market conditions, and a review of the current status of customers' accounts receivables. Due to the short-term nature of such accounts receivable, the estimated amount of accounts receivable that may not be collected is based on aging of the accounts receivable balances. Additionally, specific allowance amounts are established to record the appropriate provision for customers that no longer share risk characteristics similar with other accounts receivable. The Company’s monitoring activities include timely account reconciliation, dispute resolution, payment confirmation, consideration of customers' financial condition and macroeconomic conditions. Balances are written off when determined to be uncollectible. The Company considered the current and expected future economic and market conditions surrounding the COVID-19 pandemic and determined that the estimate of credit losses was not significantly impacted as of June 30, 2020.

Estimates are used to determine the allowance. It is based on assessment of anticipated payment and all other historical, current and future information that is reasonably available.

The following table provides a roll-forward of the allowance for credit losses that is deducted from the amortized cost basis of accounts receivable to present the net amount expected to be collected.


Beginning balance as of January 1, 2020	$	6,330
Adoption of ASU 2016-13, cumulative-effect adjustment to retained earnings	387
Bad debt expense	687
Write-off charged against the allowance and other adjustments	(1,134)
Ending balance as of June 30, 2020	$	6,270

Revenue Revenue

6 Months Ended

Jun. 30, 2020

Revenue from Contract with Customer [Abstract]

Revenue

REVENUE

Sales includes revenue from contracts with customers for designing, engineering, manufacturing and installation of solar racking systems and greenhouse structures; extraction systems; roof and foundation ventilation products; centralized mail systems and electronic package solutions; rain dispersion products and roofing accessories; expanded and perforated metal; perimeter security solutions; expansion joints and structural bearings.

Refer to Note 14 "Segment Information" for additional information related to revenue recognized by timing of transfer of control by reportable segment.

As of June 30, 2020, the Company's remaining performance obligations are part of contracts that have an original expected duration of one year or less.

Contract assets consist of costs in excess of billings. Contract liabilities consist of billings in excess of cost and unearned revenue. The following table presents the beginning and ending balances of costs in excess of billings, billings in excess of cost and unearned revenue as of June 30, 2020 and December 31, 2019, respectively, and

revenue recognized during the six months ended June 30, 2020 and 2019, respectively, that was in billings in excess of cost and unearned revenue at the beginning of the period (in thousands):


	June 30, 2020		December 31, 2019
Costs in excess of billings	$	24,627	$	20,607
Billings in excess of cost	(29,281)		(47,598)
Unearned revenue	(16,503)		(17,311)


	Six Months Ended June 30, 2020		Six Months Ended June 30, 2019
Revenue recognized in the period from:
Amounts included in billings in excess of cost at the beginning of the period	$	42,115	$	11,357
Amounts included in unearned revenue at the beginning of the period	$	12,553	$	6,153

- Definition

The entire disclosure of revenue from contract with customer to transfer good or service and to transfer nonfinancial asset. Includes, but is not limited to, disaggregation of revenue, credit loss recognized from contract with customer, judgment and change in judgment related to contract with customer, and asset recognized from cost incurred to obtain or fulfill contract with customer. Excludes insurance and lease contracts.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-URI http://asc.fasb.org/topic&trid=49130388

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 10
-URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130551-203045

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 13
-Subparagraph (b)(2)
-URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130556-203045

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 12
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130554-203045

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 9
-URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130550-203045

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 12
-Subparagraph (e)
-URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130554-203045

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 12
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130554-203045

Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 12
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130554-203045

Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 15
-URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130558-203045

Reference 10: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 12
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130554-203045

+ Details

Inventories

6 Months Ended

Jun. 30, 2020

Inventory Disclosure [Abstract]

INVENTORIES

Inventories consist of the following (in thousands):


	June 30, 2020		December 31, 2019
Raw material	$	43,234	$	45,700
Work-in-process	6,206		5,988
Finished goods	29,618		26,788
Total inventories	$	79,058	$	78,476

Acquisitions

6 Months Ended

Jun. 30, 2020

Business Combinations [Abstract]

ACQUISITIONS

2020 Acquisitions

On February 13, 2020, the Company purchased substantially all of the assets of Delta Separations, LLC, a California limited liability company, and Teaching Tech, LLC, a California limited liability company (collectively described as "Delta Separations"). Delta Separations was a privately-held engineering company primarily engaged in the assembly and sale of centrifugal ethanol-based extraction systems. The results of Delta Separations have been included in the Company's consolidated financial results since the date of acquisition within the Company's Renewable Energy and Conservation segment. The purchase consideration for the acquisition of Delta Separations was $47.1 million, which includes a working capital adjustment and certain other adjustments provided for in the asset purchase agreement.

The purchase price for the acquisition of the assets was allocated to the assets acquired and liabilities assumed based upon their respective fair values. The excess consideration was recorded as goodwill and approximated $32.9 million, all of which is deductible for tax purposes. Goodwill represents future economic benefits arising from other assets acquired that could not be individually identified including workforce additions, growth opportunities, and presence in the extraction processing markets.

The allocation of the purchase consideration to the fair value of the assets acquired and liabilities assumed is as follows as of the date of the acquisition (in thousands):



Working capital	$	4,063
Property, plant and equipment	219
Acquired intangible assets	13,000
Other assets	951
Other liabilities	(4,027)
Goodwill	32,906
Fair value of purchase consideration	$	47,112

The intangible assets acquired in this acquisition consisted of the following (in thousands):


	Fair Value		Weighted-Average Amortization Period
Trademarks	$	6,000	Indefinite
Technology	3,200		10 years
Customer relationships	3,200		11 years
Non-compete agreements	300		5 years
Backlog	300		0.25 years
Total	$	13,000

On January 15, 2020, the Company purchased substantially all of the assets of Thermo Energy Systems Inc. ("Thermo"), a Canadian-based, privately held provider of commercial greenhouse solutions in North America supporting the plant based organic food market. The results of Thermo have been included in the Company's consolidated financial results since the date of acquisition within the Company's Renewable Energy and Conservation segment. The preliminary purchase consideration for the acquisition of Thermo was $7.3 million.

The purchase price for the acquisition was preliminarily allocated to the assets acquired and liabilities assumed based upon their respective estimated fair values and the remaining consideration was recorded to goodwill. Goodwill of approximately $16.1 million was recorded, all of which is deductible for tax purposes. Goodwill represents future economic benefits arising from other assets acquired that could not be individually identified including workforce additions, growth opportunities, and increased presence in the commercial greenhouse markets. The preliminary allocation of the purchase price is subject to adjustments during the measurement period

as third-party valuations are finalized. The final purchase price allocation will be completed no later than the first quarter of 2021.

The preliminary allocation of the purchase consideration to the estimated fair value of the assets acquired and liabilities assumed is as follows as of the date of the acquisition (in thousands):


Cash	$	135
Working capital	(19,718)
Property, plant and equipment	1,069
Acquired intangible assets	9,750
Other current assets	35
Other assets	1,335
Other liabilities	(1,335)
Goodwill	16,062
Fair value of purchase consideration	$	7,333

The intangible assets acquired in this acquisition consisted of the following (in thousands):


	Fair Value		Weighted-Average Amortization Period
Trademarks	$	660	3 years
Technology	2,639		15 years
Customer relationships	6,451		10 years
Total	$	9,750

2019 Acquisition

On August 30, 2019, the Company acquired all of the outstanding membership interests of Apeks LLC ("Apeks"), a designer and manufacturer of botanical oil extraction systems and equipment. The results of Apeks have been included in the Company's consolidated financial results since the date of acquisition within the Company's Renewable Energy and Conservation segment. The aggregate purchase consideration for the acquisition of Apeks was $12.6 million, which includes a working capital adjustment and certain other adjustments provided for in the membership interest purchase agreement.

The purchase price for the acquisition was allocated to the assets acquired and liabilities assumed based upon their respective fair values. The excess consideration was recorded as goodwill and approximated $6.4 million, all of which is deductible for tax purposes. Goodwill represents future economic benefits arising from other assets acquired that could not be individually identified including workforce additions, growth opportunities, and presence in the extraction processing markets.

The allocation of the purchase consideration to the fair value of the assets acquired and liabilities assumed is as follows as of the date of the acquisition (in thousands):


Cash	$	4,154
Working capital	(1,515)
Property, plant and equipment	1,059
Acquired intangible assets	3,000
Other assets	508
Other liabilities	(1,081)
Goodwill	6,436
Fair value of purchase consideration	$	12,561

The intangible assets acquired in this acquisition consisted of the following (in thousands):


	Fair Value		Weighted-Average Amortization Period
Trademarks	$	1,400	Indefinite
Technology	900		7 years
Customer relationships	700		6 years
Total	$	3,000

In determining the allocation of the purchase price to the assets acquired and the liabilities assumed, the Company uses all available information to make fair value determinations using Level 3 unobservable inputs in which little or no market data exists, and therefore, engages independent valuation specialists to assist in the fair value determination of the acquired long-lived assets.

The acquisitions of Delta Separations, Thermo and Apeks were funded from available cash on hand.

The Company incurred certain acquisition-related costs composed of legal and consulting fees. These costs were recognized as a component of selling, general, and administrative expenses in the consolidated statement of operations. The Company also recognized costs as a component of cost of sales related to the sale of inventory at fair value as a result of allocating the purchase price of recent acquisitions.

The acquisition-related costs consisted of the following for the three and six months ended June 30 (in thousands):


	Three Months Ended June 30,						Six Months Ended June 30,
	2020		2019		2020		2019
Selling, general and administrative costs	$	588	$	4	$	1,848	$	4
Cost of sales	634		—		634		—
Total acquisition-related costs	$	1,222	$	4	$	2,482	$	4

Goodwill and Related Intangible Assets

6 Months Ended

Jun. 30, 2020

Goodwill and Intangible Assets Disclosure [Abstract]

GOODWILL AND RELATED INTANGIBLE ASSETS

Goodwill

The changes in the carrying amount of goodwill for the six months ended June 30, 2020 are as follows (in thousands):


	Renewable Energy & Conservation		Residential Products		Industrial and Infrastructure Products		Total
Balance at December 31, 2019	$	77,602	$	198,075	$	54,028	$	329,705
Acquired goodwill	49,001		—		—		49,001
Adjustments to prior year acquisitions	579		—		—		579
Foreign currency translation	(281)		—		(264)		(545)
Balance at June 30, 2020	$	126,901	$	198,075	$	53,764	$	378,740

The Company conducts its annual goodwill impairment test as of October 31 each year. All of the Company’s ten reporting units had fair values exceeding their carrying values as of October 31, 2019. In addition to the annual impairment test, the Company is required to regularly assess whether a triggering event has occurred which would require interim impairment testing. The Company considered the current and future macroeconomic and market conditions, along with its current market capitalization, projected cash flows and internal and external forecasts, and projections relating to the impact of the COVID-19 pandemic on each of its reporting units. The Company determined that a triggering event has not occurred which would require an interim impairment test to be performed.

Acquired Intangible Assets

Acquired intangible assets consist of the following (in thousands):


	June 30, 2020						December 31, 2019
	Gross Carrying Amount		Accumulated Amortization		Gross Carrying Amount		Accumulated Amortization
Indefinite-lived intangible assets:
Trademarks	$	51,295	$	—	$	45,770	$	—
Finite-lived intangible assets:
Trademarks	6,753		4,328		6,139		4,105
Unpatented technology	35,383		17,031		29,544		15,807
Customer relationships	80,976		42,876		71,195		40,294
Non-compete agreements	1,949		1,640		1,649		1,499
Backlog	300		300		—		—
	125,361		66,175		108,527		61,705
Total acquired intangible assets	$	176,656	$	66,175	$	154,297	$	61,705

The following table summarizes the acquired intangible asset amortization expense for the three and six months ended June 30 (in thousands):


	Three Months Ended June 30,						Six Months Ended June 30,
	2020		2019		2020		2019
Amortization expense	$	2,412	$	1,797	$	4,490	$	3,594

Amortization expense related to acquired intangible assets for the remainder of fiscal 2020 and the next five years thereafter is estimated as follows (in thousands):


	2020		2021		2022		2023		2024		2025
Amortization expense	$	3,860	$	7,633	$	7,154	$	6,617	$	6,363	$	6,203

Long-Term Debt	6 Months Ended
Long-Term Debt	Jun. 30, 2020
Long-term Debt, Unclassified [Abstract]
LONG-TERM DEBT	LONG-TERM DEBT The Company did not have any long-term debt outstanding at June 30, 2020 and December 31, 2019. Senior Credit Agreement On January 24, 2019, the Company entered into a Sixth Amended and Restated Credit Agreement ("Senior Credit Agreement"), which amended and restated the Company’s Fifth Amended and Restated Credit Agreement dated December 9, 2015, and provides for a revolving credit facility and letters of credit in an aggregate amount equal to $400 million. The Company can request additional financing from the lenders to increase the revolving credit facility to $700 million or enter into a term loan of up to $300 million subject to conditions set forth in the Senior Credit Agreement. The Senior Credit Agreement contains three financial covenants. As of June 30, 2020, the Company is in compliance with all three covenants. Borrowings under the Senior Credit Agreement are secured by the trade receivables, inventory, personal property, equipment, and general intangibles of the Company’s significant domestic subsidiaries. Standby letters of credit of $5.9 million have been issued under the Senior Credit Agreement on behalf of the Company as of June 30, 2020. These letters of credit reduce the amount otherwise available under the revolving credit facility. As of June 30, 2020, the Company had $394.1 million of availability under the revolving credit facility. No borrowings were outstanding under the Company's revolving credit facility at June 30, 2020 and December 31, 2019.

Accumulated Other Comprehensive (Loss) Income

6 Months Ended

Jun. 30, 2020

Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]

ACCUMULATED OTHER COMPREHENSIVE (LOSS) INCOME

The following tables summarize the cumulative balance of each component of accumulated other comprehensive loss, net of tax, for the three and six months ended June 30, (in thousands):


	Foreign Currency Translation Adjustment		Minimum pension and post retirement benefit plan adjustments		Total Pre-Tax Amount		Tax (Benefit) Expense		Accumulated Other Comprehensive (Loss) Income
Balance at December 31, 2019	$	(4,173)	$	(1,939)	$	(6,112)	$	(721)	$	(5,391)

Minimum pension and post retirement health care plan adjustments	—		25		25		7		18
Foreign currency translation adjustment	(5,898)		—		(5,898)		—		(5,898)
Balance at March 31, 2020	$	(10,071)	$	(1,914)	$	(11,985)	$	(714)	$	(11,271)
Minimum pension and post retirement health care plan adjustments	—		24		24		6		18
Foreign currency translation adjustment	2,815		—		2,815		—		2,815
Balance at June 30, 2020	$	(7,256)	$	(1,890)	$	(9,146)	$	(708)	$	(8,438)


	Foreign Currency Translation Adjustment		Minimum pension and post retirement benefit plan adjustments		Total Pre-Tax Amount		Tax (Benefit) Expense		Accumulated Other Comprehensive (Loss) Income
Balance at December 31, 2018	$	(5,939)	$	(2,040)	$	(7,979)	$	(745)	$	(7,234)

Minimum pension and post retirement health care plan adjustments	—		16		16		4		12
Foreign currency translation adjustment	842		—		842		—		842
Balance at March 31, 2019	$	(5,097)	$	(2,024)	$	(7,121)	$	(741)	$	(6,380)
Minimum pension and post retirement health care plan adjustments	—		17		17		5		12
Foreign currency translation adjustment	998		—		998		—		998
Balance at June 30, 2019	$	(4,099)	$	(2,007)	$	(6,106)	$	(736)	$	(5,370)

The realized adjustments relating to the Company’s minimum pension liability and post retirement health care costs were reclassified from accumulated other comprehensive loss and included in other expense in the consolidated statements of income.

Equity-Based Compensation

6 Months Ended

Jun. 30, 2020

Share-based Payment Arrangement, Noncash Expense [Abstract]

EQUITY-BASED COMPENSATION

On May 4, 2018, the shareholders of the Company approved the adoption of the Gibraltar Industries, Inc. 2018 Equity Incentive Plan (the "2018 Plan"). The 2018 Plan provides for the issuance of up to 1,000,000 shares of common stock and supplements the remaining shares available for issuance under the existing Gibraltar Industries, Inc. 2015 Equity Incentive Plan (the "2015 Plan"). Both the 2018 Plan and the 2015 Plan allow the Company to grant equity-based incentive compensation awards, in the form of non-qualified options, restricted shares, restricted stock units, performance shares, performance stock units, and stock rights to eligible participants.

In 2016, the shareholders of the Company approved the adoption of the Gibraltar Industries, Inc. 2016 Stock Plan for Non-Employee Directors ("Non-Employee Directors Plan") which allows the Company to grant awards of shares of the Company's common stock to non-employee Directors of the Company and permits the Directors to defer receipt of such shares pursuant to the terms of the Non-Employee Directors Plan.

Equity Based Awards - Settled in Stock

The following table sets forth the number of equity-based awards granted during the six months ended June 30, which will convert to shares upon vesting, along with the weighted average grant date fair values:


	2020				2019
Awards	Number of Awards (1)	Weighted Average Grant Date Fair Value		Number of Awards (2)	Weighted Average Grant Date Fair Value
Performance stock units	127,397	$	53.16	145,420	$	40.55
Restricted stock units	43,842	$	52.12	117,821	$	39.37
Deferred stock units	12,402	$	45.98	7,509	$	37.95
Common shares	4,134	$	45.98	7,509	$	37.95

(1) The Company’s performance stock units (“PSUs”) represent shares granted for which the final number of shares earned depends on financial performance or market conditions. The number of shares to be issued may vary between 0% and 200% of the number of performance stock units granted depending on the relative achievement to targeted thresholds. The Company's PSUs with a financial performance condition are based on either the Company’s return on invested capital (“ROIC”) over a one-year period performance period or revenue, gross profit and operating profit thresholds over a two or three-year performance period. The Company's PSUs with a market condition are based on the ranking of the

(2) Performance stock units granted in 2019 have converted to 168,688 shares to be issued to recipients in the first quarter of 2022, representing 116% of the targeted 2019 award, based on the Company’s actual ROIC compared to ROIC target for the performance period ended December 31, 2019.

Equity Based Awards - Settled in Cash

The Company's equity-based liability includes awards under a management stock purchase plan. As of June 30, 2020, the Company's total share-based liabilities recorded on the consolidated balance sheet were $29.2 million, of which $12.7 million was included in non-current liabilities. The share-based liabilities as of December 31, 2019 were $28.0 million, of which $13.2 million was included in non-current liabilities.

The Management Stock Purchase Plan ("MSPP") provides participants the ability to defer a portion of their compensation, convertible to unrestricted investments, restricted stock units, or a combination of both, or defer a portion of their directors’ fees, convertible to restricted stock units. Employees eligible to defer a portion of their compensation also receive a company-matching award in restricted stock units equal to a percentage of their compensation.

The deferrals and company-matching are credited to an account that represents a share-based liability. Eligible employees may direct their deferrals to invest in phantom restricted stock units that are measured on the 200-day average of the Company’s stock price, hypothetical investment alternatives available under Company’s 401(k) plan that are measured at market value, or a combination of both. Non-employee directors may only direct their deferrals into phantom restricted stock units that are measured on the 200-day average of the Company’s stock price. The company-matching is made in phantom restricted stock units and measured on the 200-day average of the Company’s stock price. The account will be converted to and settled in cash payable to participants upon retirement or a termination of their service to the Company.

The following table provides the number of restricted stock units credited to active participant accounts and the payments made with respect to restricted stock units issued under the MSPP during the six months ended June 30,:


	2020		2019
Restricted stock units credited	52,965		55,513
Share-based liabilities paid (in thousands)	$	4,433	$	5,742

Exit Activity Costs and Asset Impairments

6 Months Ended

Jun. 30, 2020

Restructuring and Related Activities [Abstract]

EXIT ACTIVITY COSTS AND ASSET IMPAIRMENTS

The Company has incurred exit activity costs and asset impairment charges as a result of its 80/20 simplification and portfolio management initiatives. These initiatives have resulted in the identification of low-volume, low margin, internally-produced products which have been or will be outsourced or discontinued, the simplification of processes, the sale and exiting of less profitable businesses or product lines, and the reduction in our manufacturing footprint.

Exit activity costs were incurred during the six months ended June 30, 2020 and 2019 which related to moving and closing costs, contract terminations, and severance incurred as a result of process simplification initiatives. During the six months ended June 30, 2020, the Company closed one facility in conjunction with these initiatives. No facilities were closed as a result of these initiatives during the first half of 2019.

The following tables set forth the asset impairment charges and exit activity costs incurred by segment during the three and six months ended June 30, related to the restructuring activities described above (in thousands):


	Three months ended June 30,
	2020										2019
	Inventory write-downs &/or asset impairment charges		Exit activity costs		Total		Inventory write-downs &/or asset impairment charges		Exit activity (recoveries) costs, net		Total
Renewable Energy and Conservation	$	72	$	316	$	388	$	—	$	(95)	$	(95)
Residential Products	—		263		263		—		219		219
Industrial and Infrastructure Products	274		40		314		—		1,346		1,346
Corporate	—		45		45		—		666		666
Total exit activity costs & asset impairments	$	346	$	664	$	1,010	$	—	$	2,136	$	2,136


	Six months ended June 30,
	2020										2019
	Inventory write-downs &/or asset impairment charges		Exit activity costs		Total		Inventory write-downs &/or asset impairment charges		Exit activity (recoveries) costs, net		Total
Renewable Energy and Conservation	$	72	$	334	$	406	$	—	$	(1)	$	(1)
Residential Products	—		484		484		—		370		370
Industrial and Infrastructure Products	274		38		312		—		1,313		1,313
Corporate	—		99		99		—		673		673
Total exit activity costs & asset impairments	$	346	$	955	$	1,301	$	—	$	2,355	$	2,355

The following table provides a summary of where the asset impairments and exit activity costs were recorded in the consolidated statements of income for the three and six months ended June 30, (in thousands):


	Three Months Ended June 30,						Six Months Ended June 30,
	2020		2019		2020		2019
Cost of sales	$	786	$	319	$	873	$	285
Selling, general, and administrative expense	224		1,817		428		2,070
Total asset impairment and exit activity charges	$	1,010	$	2,136	$	1,301	$	2,355

The following table reconciles the beginning and ending liability for exit activity costs relating to the Company’s facility consolidation efforts (in thousands):


	2020		2019
Balance at January 1	$	5,449	$	1,923
Exit activity costs recognized	955		2,355
Cash payments	(5,575)		(1,329)
Balance at June 30	$	829	$	2,949

On June 30, 2020, the Company sold its self-guided apartment tour application business to a third party from its Residential Products segment. The $2.0 million net proceeds from the sale resulted in pre-tax net gain of $1.9 million and has been presented within other (income) expense in the consolidated statements of income. This divestiture does not meet the criteria to be reported as a discontinued operation nor will it have a major effect on the Company's operations.

Income Taxes

6 Months Ended

Jun. 30, 2020

Income Tax Disclosure [Abstract]

INCOME TAXES

The following table summarizes the provision for income taxes for continuing operations (in thousands) for the three and six months ended June 30, and the applicable effective tax rates:


	Three Months Ended June 30,									Six Months Ended June 30,
	2020			2019			2020			2019
Provision for income taxes	$	8,872		$	6,487		$	11,858		$	8,058
Effective tax rate	24.5		%	24.6		%	23.2		%	23.5		%

The effective tax rate for the three and six months ended June 30, 2020 and 2019, respectively, was more than the U.S. federal statutory rate of 21% due to state taxes and nondeductible permanent differences partially offset by favorable discrete items.

On March 27, 2020, the President of the United States signed into law the Coronavirus Aid, Relief, and Economic Security Act ("CARES Act"). The CARES Act, among other things, includes certain income tax provisions for individuals and corporations; however, these benefits do not materially impact the Company’s income tax provision.

On July 20, 2020, the Department of Treasury and the Internal Revenue Service issued final regulations addressing the treatment of income earned by certain foreign corporations related to the treatment of income that is subject to high rate of foreign tax under the global intangible low-taxed income ("GILTI") and subpart F income regimes. These provisions would be effective for the Company starting in 2021 but includes retroactive provisions that may allow for retroactive application. The Company is currently evaluating the impact of this guidance on its consolidated financial statements.

- Definition

The entire disclosure for income taxes. Disclosures may include net deferred tax liability or asset recognized in an enterprise's statement of financial position, net change during the year in the total valuation allowance, approximate tax effect of each type of temporary difference and carryforward that gives rise to a significant portion of deferred tax liabilities and deferred tax assets, utilization of a tax carryback, and tax uncertainties information.

+ References + Details

Earnings per Share

6 Months Ended

Jun. 30, 2020

Earnings Per Share [Abstract]

EARNINGS PER SHARE

Basic earnings and diluted weighted-average shares outstanding are as follows for the three and six months ended June 30, (in thousands):


	Three Months Ended June 30,						Six Months Ended June 30,
	2020		2019		2020		2019
Numerator:


Net income available to common shareholders	$	27,292	$	19,913	$	39,351	$	26,258
Denominator for basic earnings per share:
Weighted average shares outstanding	32,605		32,321		32,596		32,300
Denominator for diluted earnings per share:
Weighted average shares outstanding	32,605		32,321		32,596		32,300
Common stock options and stock units	255		321		272		330
Weighted average shares and conversions	32,860		32,642		32,868		32,630

The weighted average number of diluted shares does not include potential anti-dilutive common shares issuable pursuant to equity based incentive compensation awards, aggregating to 77,000 and 366,000 for the three months ended June 30, 2020 and 2019, respectively, and 47,000 and 312,000 for the six months ended June 30, 2020 and 2019, respectively.

Segment Information

6 Months Ended

Jun. 30, 2020

Segment Reporting Information, Revenue for Reportable Segment [Abstract]

SEGMENT INFORMATION

SEGMENT INFORMATIONThe Company is organized into three reportable segments on the basis of the production process and products and services provided by each segment, identified as follows:

(i)Renewable Energy and Conservation, which primarily includes designing, engineering, manufacturing and installation of solar racking, electrical balance of systems, extraction systems and greenhouse structures;

(ii)Residential Products, which primarily includes roof and foundation ventilation products, rain dispersion products and roofing accessories, centralized mail systems and electronic package solutions; and

(iii)Industrial and Infrastructure Products, which primarily includes expanded and perforated metal, perimeter security systems, expansion joints, and structural bearings.

When determining the reportable segments, the Company aggregated operating segments based on their similar economic and operating characteristics.

The following table illustrates certain measurements used by management to assess performance of the segments described above for the three and six months ended June 30, (in thousands):


	Three Months Ended June 30,						Six Months Ended June 30,
	2020		2019		2020		2019
Net sales:
Renewable Energy and Conservation	$	98,259	$	76,004	$	194,756	$	144,841
Residential Products	139,472		130,433		242,891		234,142
Industrial and Infrastructure Products	48,263		56,547		98,064		111,735
Less: Intersegment sales	(180)		(329)		(458)		(646)
Net Industrial and Infrastructure Products	48,083		56,218		97,606		111,089
Total consolidated net sales	$	285,814	$	262,655	$	535,253	$	490,072

Income from operations:
Renewable Energy and Conservation	$	9,188	$	9,649	$	14,887	$	11,281
Residential Products	27,964		20,778		41,689		32,868
Industrial and Infrastructure Products	6,644		4,069		10,633		8,198
Unallocated Corporate Expenses	(9,205)		(7,890)		(17,428)		(15,175)
Total consolidated income from operations	$	34,591	$	26,606	$	49,781	$	37,172

The following tables illustrate revenue disaggregated by timing of transfer of control to the customer for the three and six months ended June 30 (in thousands):


	Three Months Ended June 30, 2020
	Renewable Energy and Conservation		Residential Products		Industrial and Infrastructure Products		Total
Net sales:
Point in Time	$	12,416	$	138,288	$	37,179	$	187,883
Over Time	85,843		1,184		10,904		97,931
Total net sales	$	98,259	$	139,472	$	48,083	$	285,814


	Three Months Ended June 30, 2019
	Renewable Energy and Conservation		Residential Products		Industrial and Infrastructure Products		Total
Net sales:
Point in Time	$	8,469	$	129,566	$	46,315	$	184,350
Over Time	67,535		867		9,903		78,305
Total net sales	$	76,004	$	130,433	$	56,218	$	262,655


	Six Months Ended June 30, 2020
	Renewable Energy and Conservation		Residential Products		Industrial and Infrastructure Products		Total
Net sales:
Point in Time	$	27,004	$	240,619	$	76,674	$	344,297
Over Time	167,752		2,272		20,932		190,956
Total net sales	$	194,756	$	242,891	$	97,606	$	535,253


	Six Months Ended June 30, 2019
	Renewable Energy and Conservation		Residential Products		Industrial and Infrastructure Products		Total
Net sales:
Point in Time	$	15,759	$	232,458	$	91,602	$	339,819
Over Time	129,082		1,684		19,487		150,253
Total net sales	$	144,841	$	234,142	$	111,089	$	490,072

- Definition

The entire disclosure for reporting segments including data and tables. Reportable segments include those that meet any of the following quantitative thresholds a) it's reported revenue, including sales to external customers and intersegment sales or transfers is 10 percent or more of the combined revenue, internal and external, of all operating segments b) the absolute amount of its reported profit or loss is 10 percent or more of the greater, in absolute amount of 1) the combined reported profit of all operating segments that did not report a loss or 2) the combined reported loss of all operating segments that did report a loss c) its assets are 10 percent or more of the combined assets of all operating segments.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 31
-URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8924-108599

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 34
-URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8981-108599

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 21
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8721-108599

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
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-URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e9031-108599

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 10
-Section 50
-Paragraph 32
-Subparagraph (f)
-URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8933-108599

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 32
-Subparagraph (e)
-URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8933-108599

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
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-URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8844-108599

Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 41
-URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e9038-108599

Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 32
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8933-108599

Reference 10: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
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-URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8736-108599

Reference 11: http://www.xbrl.org/2003/role/disclosureRef
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-Name Accounting Standards Codification
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Reference 12: http://www.xbrl.org/2003/role/disclosureRef
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-Name Accounting Standards Codification
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Reference 13: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
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-URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8721-108599

Reference 14: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-URI http://asc.fasb.org/topic&trid=2134510

+ Details

Recent Accounting Pronouncements (Policies)

6 Months Ended

Jun. 30, 2020

Accounting Policies [Abstract]

Recent Accounting Pronouncements

Recent Accounting Pronouncements Adopted

Standard

Description

Financial Statement Effect or Other Significant Matters

ASU No. 2016-13

Financial Instruments - Credit Losses

(Topic 326)

Date of adoption: Q1 2020

ASU 2018-15

Intangibles - Goodwill and Other - Internal-Use Software (Subtopic 350-40), Customer's Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract

Recent Accounting Pronouncements Not Yet Adopted

Standard

Description

Financial Statement Effect or Other Significant Matters

ASU No. 2019-12

Income Taxes (Topic 740), Simplifying the Accounting for Income Taxes

The Company is currently evaluating the requirements of this standard. The standard is not expected to have a material impact on the Company's financial statements.

Date of adoption: Q1 2021

Recent Accounting Pronouncements - (Tables)

6 Months Ended

Jun. 30, 2019

Accounting Policies [Abstract]

Schedule of New Accounting Pronouncements and Changes in Accounting Principles

Recent Accounting Pronouncements Adopted

Standard

Description

Financial Statement Effect or Other Significant Matters

ASU No. 2016-13

Financial Instruments - Credit Losses

(Topic 326)

Date of adoption: Q1 2020

ASU 2018-15

Intangibles - Goodwill and Other - Internal-Use Software (Subtopic 350-40), Customer's Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract

Recent Accounting Pronouncements Not Yet Adopted

Standard

Description

Financial Statement Effect or Other Significant Matters

ASU No. 2019-12

Income Taxes (Topic 740), Simplifying the Accounting for Income Taxes

The Company is currently evaluating the requirements of this standard. The standard is not expected to have a material impact on the Company's financial statements.

Date of adoption: Q1 2021

Accounts Receivable and Allowance for Doubtful Accounts (Tables)

6 Months Ended

Jun. 30, 2020

Receivables [Abstract]

Schedule of Accounts Receivable

Accounts receivable consists of the following (in thousands):


	June 30, 2020		December 31, 2019
Trade accounts receivable	$	175,251	$	133,238
Costs in excess of billings	24,628		20,607
Total accounts receivables	199,879		153,845
Less allowance for doubtful accounts and contract assets	(6,270)		(6,330)
Accounts receivable	$	193,609	$	147,515


Beginning balance as of January 1, 2020	$	6,330
Adoption of ASU 2016-13, cumulative-effect adjustment to retained earnings	387
Bad debt expense	687
Write-off charged against the allowance and other adjustments	(1,134)
Ending balance as of June 30, 2020	$	6,270

Revenue (Tables)

6 Months Ended

Jun. 30, 2020

Revenue from Contract with Customer [Abstract]

Contract with Customer, Asset and Liability

The following table presents the beginning and ending balances of costs in excess of billings, billings in excess of cost and unearned revenue as of June 30, 2020 and December 31, 2019, respectively, and

revenue recognized during the six months ended June 30, 2020 and 2019, respectively, that was in billings in excess of cost and unearned revenue at the beginning of the period (in thousands):


	June 30, 2020		December 31, 2019
Costs in excess of billings	$	24,627	$	20,607
Billings in excess of cost	(29,281)		(47,598)
Unearned revenue	(16,503)		(17,311)


	Six Months Ended June 30, 2020		Six Months Ended June 30, 2019
Revenue recognized in the period from:
Amounts included in billings in excess of cost at the beginning of the period	$	42,115	$	11,357
Amounts included in unearned revenue at the beginning of the period	$	12,553	$	6,153

Inventories (Tables)

6 Months Ended

Jun. 30, 2020

Inventory Disclosure [Abstract]

Schedule Of Inventories

Inventories consist of the following (in thousands):


	June 30, 2020		December 31, 2019
Raw material	$	43,234	$	45,700
Work-in-process	6,206		5,988
Finished goods	29,618		26,788
Total inventories	$	79,058	$	78,476

Acquisitions (Tables)

6 Months Ended

Jun. 30, 2020

Business Combinations [Abstract]

Schedule of Acquisition

The allocation of the purchase consideration to the fair value of the assets acquired and liabilities assumed is as follows as of the date of the acquisition (in thousands):



Working capital	$	4,063
Property, plant and equipment	219
Acquired intangible assets	13,000
Other assets	951
Other liabilities	(4,027)
Goodwill	32,906
Fair value of purchase consideration	$	47,112

The preliminary allocation of the purchase consideration to the estimated fair value of the assets acquired and liabilities assumed is as follows as of the date of the acquisition (in thousands):


Cash	$	135
Working capital	(19,718)
Property, plant and equipment	1,069
Acquired intangible assets	9,750
Other current assets	35
Other assets	1,335
Other liabilities	(1,335)
Goodwill	16,062
Fair value of purchase consideration	$	7,333

The allocation of the purchase consideration to the fair value of the assets acquired and liabilities assumed is as follows as of the date of the acquisition (in thousands):


Cash	$	4,154
Working capital	(1,515)
Property, plant and equipment	1,059
Acquired intangible assets	3,000
Other assets	508
Other liabilities	(1,081)
Goodwill	6,436
Fair value of purchase consideration	$	12,561

The acquisition-related costs consisted of the following for the three and six months ended June 30 (in thousands):


	Three Months Ended June 30,						Six Months Ended June 30,
	2020		2019		2020		2019
Selling, general and administrative costs	$	588	$	4	$	1,848	$	4
Cost of sales	634		—		634		—
Total acquisition-related costs	$	1,222	$	4	$	2,482	$	4

Intangible Assets Acquired

The intangible assets acquired in this acquisition consisted of the following (in thousands):


	Fair Value		Weighted-Average Amortization Period
Trademarks	$	6,000	Indefinite
Technology	3,200		10 years
Customer relationships	3,200		11 years
Non-compete agreements	300		5 years
Backlog	300		0.25 years
Total	$	13,000

The intangible assets acquired in this acquisition consisted of the following (in thousands):


	Fair Value		Weighted-Average Amortization Period
Trademarks	$	660	3 years
Technology	2,639		15 years
Customer relationships	6,451		10 years
Total	$	9,750

The intangible assets acquired in this acquisition consisted of the following (in thousands):


	Fair Value		Weighted-Average Amortization Period
Trademarks	$	1,400	Indefinite
Technology	900		7 years
Customer relationships	700		6 years
Total	$	3,000

Goodwill and Related Intangible Assets (Tables)

6 Months Ended

Jun. 30, 2020

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule Of Changes In Carrying Amount Of Goodwill

The changes in the carrying amount of goodwill for the six months ended June 30, 2020 are as follows (in thousands):


	Renewable Energy & Conservation		Residential Products		Industrial and Infrastructure Products		Total
Balance at December 31, 2019	$	77,602	$	198,075	$	54,028	$	329,705
Acquired goodwill	49,001		—		—		49,001
Adjustments to prior year acquisitions	579		—		—		579
Foreign currency translation	(281)		—		(264)		(545)
Balance at June 30, 2020	$	126,901	$	198,075	$	53,764	$	378,740

Schedule Of Acquired Intangible Assets

Acquired intangible assets consist of the following (in thousands):


	June 30, 2020						December 31, 2019
	Gross Carrying Amount		Accumulated Amortization		Gross Carrying Amount		Accumulated Amortization
Indefinite-lived intangible assets:
Trademarks	$	51,295	$	—	$	45,770	$	—
Finite-lived intangible assets:
Trademarks	6,753		4,328		6,139		4,105
Unpatented technology	35,383		17,031		29,544		15,807
Customer relationships	80,976		42,876		71,195		40,294
Non-compete agreements	1,949		1,640		1,649		1,499
Backlog	300		300		—		—
	125,361		66,175		108,527		61,705
Total acquired intangible assets	$	176,656	$	66,175	$	154,297	$	61,705

Schedule of Acquired Intangible Asset Amortization Expense

The following table summarizes the acquired intangible asset amortization expense for the three and six months ended June 30 (in thousands):


	Three Months Ended June 30,						Six Months Ended June 30,
	2020		2019		2020		2019
Amortization expense	$	2,412	$	1,797	$	4,490	$	3,594

Schedule Of Amortization Expense

Amortization expense related to acquired intangible assets for the remainder of fiscal 2020 and the next five years thereafter is estimated as follows (in thousands):


	2020		2021		2022		2023		2024		2025
Amortization expense	$	3,860	$	7,633	$	7,154	$	6,617	$	6,363	$	6,203

Accumulated Other Comprehensive (Loss) Income (Tables)

6 Months Ended

Jun. 30, 2020

Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]

Schedule Of Components Of Accumulated Other Comprehensive Loss

The following tables summarize the cumulative balance of each component of accumulated other comprehensive loss, net of tax, for the three and six months ended June 30, (in thousands):


	Foreign Currency Translation Adjustment		Minimum pension and post retirement benefit plan adjustments		Total Pre-Tax Amount		Tax (Benefit) Expense		Accumulated Other Comprehensive (Loss) Income
Balance at December 31, 2019	$	(4,173)	$	(1,939)	$	(6,112)	$	(721)	$	(5,391)

Minimum pension and post retirement health care plan adjustments	—		25		25		7		18
Foreign currency translation adjustment	(5,898)		—		(5,898)		—		(5,898)
Balance at March 31, 2020	$	(10,071)	$	(1,914)	$	(11,985)	$	(714)	$	(11,271)
Minimum pension and post retirement health care plan adjustments	—		24		24		6		18
Foreign currency translation adjustment	2,815		—		2,815		—		2,815
Balance at June 30, 2020	$	(7,256)	$	(1,890)	$	(9,146)	$	(708)	$	(8,438)


	Foreign Currency Translation Adjustment		Minimum pension and post retirement benefit plan adjustments		Total Pre-Tax Amount		Tax (Benefit) Expense		Accumulated Other Comprehensive (Loss) Income
Balance at December 31, 2018	$	(5,939)	$	(2,040)	$	(7,979)	$	(745)	$	(7,234)

Minimum pension and post retirement health care plan adjustments	—		16		16		4		12
Foreign currency translation adjustment	842		—		842		—		842
Balance at March 31, 2019	$	(5,097)	$	(2,024)	$	(7,121)	$	(741)	$	(6,380)
Minimum pension and post retirement health care plan adjustments	—		17		17		5		12
Foreign currency translation adjustment	998		—		998		—		998
Balance at June 30, 2019	$	(4,099)	$	(2,007)	$	(6,106)	$	(736)	$	(5,370)

Equity-Based Compensation (Tables)

6 Months Ended

Jun. 30, 2020

Share-based Payment Arrangement, Noncash Expense [Abstract]

Schedule Of Number Of Awards And Weighted Average Grant Date Fair Value


	2020				2019
Awards	Number of Awards (1)	Weighted Average Grant Date Fair Value		Number of Awards (2)	Weighted Average Grant Date Fair Value
Performance stock units	127,397	$	53.16	145,420	$	40.55
Restricted stock units	43,842	$	52.12	117,821	$	39.37
Deferred stock units	12,402	$	45.98	7,509	$	37.95
Common shares	4,134	$	45.98	7,509	$	37.95

Company’s total shareholder return (“TSR”) performance, on a percentile basis, over a three year performance period compared to the S&P Small Cap Industrial sector, over the same three year performance period.(2) Performance stock units granted in 2019 have converted to 168,688 shares to be issued to recipients in the first quarter of 2022, representing 116% of the targeted 2019 award, based on the Company’s actual ROIC compared to ROIC target for the performance period ended December 31, 2019.

Management Stock Purchase Plan


	2020		2019
Restricted stock units credited	52,965		55,513
Share-based liabilities paid (in thousands)	$	4,433	$	5,742

Exit Activity Costs and Asset Impairments (Tables)

6 Months Ended

Jun. 30, 2020

Restructuring and Related Activities [Abstract]

Summary Of Exit Activity Costs And Asset Impairments


	Three months ended June 30,
	2020										2019
	Inventory write-downs &/or asset impairment charges		Exit activity costs		Total		Inventory write-downs &/or asset impairment charges		Exit activity (recoveries) costs, net		Total
Renewable Energy and Conservation	$	72	$	316	$	388	$	—	$	(95)	$	(95)
Residential Products	—		263		263		—		219		219
Industrial and Infrastructure Products	274		40		314		—		1,346		1,346
Corporate	—		45		45		—		666		666
Total exit activity costs & asset impairments	$	346	$	664	$	1,010	$	—	$	2,136	$	2,136


	Six months ended June 30,
	2020										2019
	Inventory write-downs &/or asset impairment charges		Exit activity costs		Total		Inventory write-downs &/or asset impairment charges		Exit activity (recoveries) costs, net		Total
Renewable Energy and Conservation	$	72	$	334	$	406	$	—	$	(1)	$	(1)
Residential Products	—		484		484		—		370		370
Industrial and Infrastructure Products	274		38		312		—		1,313		1,313
Corporate	—		99		99		—		673		673
Total exit activity costs & asset impairments	$	346	$	955	$	1,301	$	—	$	2,355	$	2,355


	Three Months Ended June 30,						Six Months Ended June 30,
	2020		2019		2020		2019
Cost of sales	$	786	$	319	$	873	$	285
Selling, general, and administrative expense	224		1,817		428		2,070
Total asset impairment and exit activity charges	$	1,010	$	2,136	$	1,301	$	2,355

Reconciliation Of Liability For Exit Activity Costs Relating To Facility Consolidation Efforts

The following table reconciles the beginning and ending liability for exit activity costs relating to the Company’s facility consolidation efforts (in thousands):


	2020		2019
Balance at January 1	$	5,449	$	1,923
Exit activity costs recognized	955		2,355
Cash payments	(5,575)		(1,329)
Balance at June 30	$	829	$	2,949

Income Taxes (Tables)

6 Months Ended

Jun. 30, 2020

Income Tax Disclosure [Abstract]

Summary Of Provision For Income Taxes For Continuing Operations

The following table summarizes the provision for income taxes for continuing operations (in thousands) for the three and six months ended June 30, and the applicable effective tax rates:


	Three Months Ended June 30,									Six Months Ended June 30,
	2020			2019			2020			2019
Provision for income taxes	$	8,872		$	6,487		$	11,858		$	8,058
Effective tax rate	24.5		%	24.6		%	23.2		%	23.5		%

Earnings per Share (Tables)

6 Months Ended

Jun. 30, 2020

Earnings Per Share [Abstract]

Schedule Of Computation Of Basic And Diluted Loss Per Share

Basic earnings and diluted weighted-average shares outstanding are as follows for the three and six months ended June 30, (in thousands):


	Three Months Ended June 30,						Six Months Ended June 30,
	2020		2019		2020		2019
Numerator:


Net income available to common shareholders	$	27,292	$	19,913	$	39,351	$	26,258
Denominator for basic earnings per share:
Weighted average shares outstanding	32,605		32,321		32,596		32,300
Denominator for diluted earnings per share:
Weighted average shares outstanding	32,605		32,321		32,596		32,300
Common stock options and stock units	255		321		272		330
Weighted average shares and conversions	32,860		32,642		32,868		32,630

Segment Information (Tables)

6 Months Ended

Jun. 30, 2020

Segment Reporting Information, Revenue for Reportable Segment [Abstract]

Reconciliation Of Sales To Earnings Before Income Taxes by Segment

The following table illustrates certain measurements used by management to assess performance of the segments described above for the three and six months ended June 30, (in thousands):


	Three Months Ended June 30,						Six Months Ended June 30,
	2020		2019		2020		2019
Net sales:
Renewable Energy and Conservation	$	98,259	$	76,004	$	194,756	$	144,841
Residential Products	139,472		130,433		242,891		234,142
Industrial and Infrastructure Products	48,263		56,547		98,064		111,735
Less: Intersegment sales	(180)		(329)		(458)		(646)
Net Industrial and Infrastructure Products	48,083		56,218		97,606		111,089
Total consolidated net sales	$	285,814	$	262,655	$	535,253	$	490,072

Income from operations:
Renewable Energy and Conservation	$	9,188	$	9,649	$	14,887	$	11,281
Residential Products	27,964		20,778		41,689		32,868
Industrial and Infrastructure Products	6,644		4,069		10,633		8,198
Unallocated Corporate Expenses	(9,205)		(7,890)		(17,428)		(15,175)
Total consolidated income from operations	$	34,591	$	26,606	$	49,781	$	37,172

Disaggregation of Revenue

The following tables illustrate revenue disaggregated by timing of transfer of control to the customer for the three and six months ended June 30 (in thousands):


	Three Months Ended June 30, 2020
	Renewable Energy and Conservation		Residential Products		Industrial and Infrastructure Products		Total
Net sales:
Point in Time	$	12,416	$	138,288	$	37,179	$	187,883
Over Time	85,843		1,184		10,904		97,931
Total net sales	$	98,259	$	139,472	$	48,083	$	285,814


	Three Months Ended June 30, 2019
	Renewable Energy and Conservation		Residential Products		Industrial and Infrastructure Products		Total
Net sales:
Point in Time	$	8,469	$	129,566	$	46,315	$	184,350
Over Time	67,535		867		9,903		78,305
Total net sales	$	76,004	$	130,433	$	56,218	$	262,655


	Six Months Ended June 30, 2020
	Renewable Energy and Conservation		Residential Products		Industrial and Infrastructure Products		Total
Net sales:
Point in Time	$	27,004	$	240,619	$	76,674	$	344,297
Over Time	167,752		2,272		20,932		190,956
Total net sales	$	194,756	$	242,891	$	97,606	$	535,253


	Six Months Ended June 30, 2019
	Renewable Energy and Conservation		Residential Products		Industrial and Infrastructure Products		Total
Net sales:
Point in Time	$	15,759	$	232,458	$	91,602	$	339,819
Over Time	129,082		1,684		19,487		150,253
Total net sales	$	144,841	$	234,142	$	111,089	$	490,072

Recent Accounting Pronouncements - Narrative (Details) - USD ($)		3 Months Ended		6 Months Ended
	Jan. 01, 2020	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Retained earnings		$ 444,728,000		$ 444,728,000		$ 405,668,000
Income tax benefit		$ (8,872,000)	$ (6,487,000)	$ (11,858,000)	$ (8,058,000)
Accounting Standards Update [Extensible List]				us-gaap:AccountingStandardsUpdate201613Member
Cumulative Effect, Period of Adoption, Adjustment
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Income tax benefit	$ 96,000
Retained Earnings \| Cumulative Effect, Period of Adoption, Adjustment
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Retained earnings	$ (291,000)

- Definition

Indicates amendment to accounting standards.

+ References

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+ Details

- Definition

Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

+ References + Details

Accounts Receivable and Allowance for Doubtful Accounts - Schedule of Receivables (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Receivables [Abstract]
Trade accounts receivable	$ 175,251	$ 133,238
Costs in excess of billings	24,628	20,607
Total accounts receivables	199,879	153,845
Less allowance for doubtful accounts and contract assets	(6,270)	(6,330)
Accounts receivable	$ 193,609	$ 147,515

Accounts Receivable and Allowance for Doubtful Accounts - Schedule of Accounts Receivable Allowance for Credit Losses (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2020	Jan. 01, 2020
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance as of January 1, 2020	$ 6,330
Adoption of ASU 2016-13, cumulative-effect adjustment to retained earnings	6,330
Bad debt expense	687
Write-off charged against the allowance and other adjustments	(1,134)
Ending balance as of June 30, 2020	$ 6,270
Cumulative Effect, Period of Adoption, Adjustment
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Adoption of ASU 2016-13, cumulative-effect adjustment to retained earnings		$ 387

Revenue - Narrative (Details)	Jun. 30, 2020
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2020-04-01 \| Maximum
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Remaining performance obligation expected timing of satisfaction	1 year

Revenue - Contract Assets and Liabilities (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019
Capitalized Contract Cost [Line Items]
Costs in excess of billings	$ 24,627		$ 20,607
Amounts included in billings in excess of cost at the beginning of the period	42,115	$ 11,357
Amounts included in unearned revenue at the beginning of the period	12,553	$ 6,153
Billings in excess of cost
Capitalized Contract Cost [Line Items]
Contract with customer liability	(29,281)		(47,598)
Unearned revenue
Capitalized Contract Cost [Line Items]
Contract with customer liability	$ (16,503)		$ (17,311)

Inventories (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Inventory Disclosure [Abstract]
Raw material	$ 43,234	$ 45,700
Work-in-process	6,206	5,988
Finished goods	29,618	26,788
Total inventories	$ 79,058	$ 78,476

Acquisitions (Narrative) (Details) - USD ($) $ in Thousands				3 Months Ended		6 Months Ended
Acquisitions (Narrative) (Details) - USD ($) $ in Thousands	Feb. 13, 2020	Jan. 15, 2020	Aug. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019
Business Acquisition [Line Items]
Goodwill				$ 378,740		$ 378,740		$ 329,705
Total acquisition-related costs				1,222	$ 4	2,482	$ 4
Delta Separations
Business Acquisition [Line Items]
Aggregate consideration for acquisition	$ 47,100
Goodwill	$ 32,906
Thermo Energy Systems
Business Acquisition [Line Items]
Aggregate consideration for acquisition		$ 7,300
Goodwill		$ 16,062
Apeks
Business Acquisition [Line Items]
Aggregate consideration for acquisition			$ 12,600
Goodwill			$ 6,436
Selling, general and administrative costs
Business Acquisition [Line Items]
Total acquisition-related costs				$ 588	$ 4	$ 1,848	$ 4

Acquisitions (Allocation of Purchase Consideration to the Assets Acquired and Liabilities Assumed) (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Feb. 13, 2020	Jan. 15, 2020	Dec. 31, 2019	Aug. 30, 2019
Business Acquisition [Line Items]
Goodwill	$ 378,740			$ 329,705
Delta Separations
Business Acquisition [Line Items]
Working capital		$ 4,063
Property, plant and equipment		219
Acquired intangible assets		13,000
Other assets		951
Other liabilities		(4,027)
Goodwill		32,906
Fair value of purchase consideration		$ 47,112
Thermo Energy Systems
Business Acquisition [Line Items]
Cash			$ 135
Working capital			(19,718)
Property, plant and equipment			1,069
Acquired intangible assets			9,750
Other current assets			35
Other assets			1,335
Other liabilities			(1,335)
Goodwill			16,062
Fair value of purchase consideration			$ 7,333
Apeks
Business Acquisition [Line Items]
Cash					$ 4,154
Working capital					(1,515)
Property, plant and equipment					1,059
Acquired intangible assets					3,000
Other assets					508
Other liabilities					(1,081)
Goodwill					6,436
Fair value of purchase consideration					$ 12,561

Acquisitions (Schedule of Acquired Intangible Assets) (Details) - USD ($) $ in Thousands	Feb. 13, 2020	Jan. 15, 2020	Aug. 30, 2019
Delta Separations
Acquired Finite-Lived Intangible Assets [Line Items]
Fair Value, finite-lived intangible assets acquired	$ 13,000
Delta Separations \| Trademarks
Acquired Finite-Lived Intangible Assets [Line Items]
Fair Value, finite-lived intangible assets acquired	6,000
Delta Separations \| Technology
Acquired Finite-Lived Intangible Assets [Line Items]
Fair Value, finite-lived intangible assets acquired	$ 3,200
Estimated Useful Life	10 years
Delta Separations \| Customer relationships
Acquired Finite-Lived Intangible Assets [Line Items]
Fair Value, finite-lived intangible assets acquired	$ 3,200
Estimated Useful Life	11 years
Delta Separations \| Non-compete agreements
Acquired Finite-Lived Intangible Assets [Line Items]
Fair Value, finite-lived intangible assets acquired	$ 300
Estimated Useful Life	5 years
Delta Separations \| Backlog
Acquired Finite-Lived Intangible Assets [Line Items]
Fair Value, finite-lived intangible assets acquired	$ 300
Estimated Useful Life	3 months
Thermo Energy Systems
Acquired Finite-Lived Intangible Assets [Line Items]
Fair Value, finite-lived intangible assets acquired		$ 9,750
Thermo Energy Systems \| Trademarks
Acquired Finite-Lived Intangible Assets [Line Items]
Fair Value, finite-lived intangible assets acquired		$ 660
Estimated Useful Life		3 years
Thermo Energy Systems \| Technology
Acquired Finite-Lived Intangible Assets [Line Items]
Fair Value, finite-lived intangible assets acquired		$ 2,639
Estimated Useful Life		15 years
Thermo Energy Systems \| Customer relationships
Acquired Finite-Lived Intangible Assets [Line Items]
Fair Value, finite-lived intangible assets acquired		$ 6,451
Estimated Useful Life		10 years
Apeks
Acquired Finite-Lived Intangible Assets [Line Items]
Fair Value, finite-lived intangible assets acquired			$ 3,000
Apeks \| Trademarks
Acquired Finite-Lived Intangible Assets [Line Items]
Fair Value, finite-lived intangible assets acquired			1,400
Apeks \| Technology
Acquired Finite-Lived Intangible Assets [Line Items]
Fair Value, finite-lived intangible assets acquired			$ 900
Estimated Useful Life			7 years
Apeks \| Customer relationships
Acquired Finite-Lived Intangible Assets [Line Items]
Fair Value, finite-lived intangible assets acquired			$ 700
Estimated Useful Life			6 years

Acquisitions - Acquisition Related Costs (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Business Acquisition [Line Items]
Total acquisition-related costs	$ 1,222	$ 4	$ 2,482	$ 4
Selling, general and administrative costs
Business Acquisition [Line Items]
Total acquisition-related costs	588	4	1,848	4
Cost of sales
Business Acquisition [Line Items]
Total acquisition-related costs	$ 634	$ 0	$ 634	$ 0

Goodwill and Related Intangible Assets (Schedule of Changes in Carrying Amount of Goodwill) (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2020 USD ($)
Goodwill [Roll Forward]
Balance at December 31, 2019	$ 329,705
Acquired goodwill	49,001
Adjustments to prior year acquisitions	579
Foreign currency translation	(545)
Balance at June 30, 2020	378,740
Renewable Energy and Conservation
Goodwill [Roll Forward]
Balance at December 31, 2019	77,602
Acquired goodwill	49,001
Adjustments to prior year acquisitions	579
Foreign currency translation	(281)
Balance at June 30, 2020	126,901
Residential Products
Goodwill [Roll Forward]
Balance at December 31, 2019	198,075
Acquired goodwill	0
Adjustments to prior year acquisitions	0
Foreign currency translation	0
Balance at June 30, 2020	198,075
Industrial and Infrastructure Products
Goodwill [Roll Forward]
Balance at December 31, 2019	54,028
Acquired goodwill	0
Adjustments to prior year acquisitions	0
Foreign currency translation	(264)
Balance at June 30, 2020	$ 53,764

Goodwill and Related Intangible Assets (Schedule of Acquired Intangible Assets) (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount, Finite-lived intangible assets	$ 125,361	$ 108,527
Total acquired intangible assets, Gross Carrying Amount	176,656	154,297
Accumulated Amortization, Finite-lived intangible assets	66,175	61,705
Total acquired intangible assets, Accumulated Amortization	66,175	61,705
Trademarks
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount, Finite-lived intangible assets	6,753	6,139
Accumulated Amortization, Finite-lived intangible assets	4,328	4,105
Unpatented technology
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount, Finite-lived intangible assets	35,383	29,544
Accumulated Amortization, Finite-lived intangible assets	17,031	15,807
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount, Finite-lived intangible assets	80,976	71,195
Accumulated Amortization, Finite-lived intangible assets	42,876	40,294
Non-compete agreements
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount, Finite-lived intangible assets	1,949	1,649
Accumulated Amortization, Finite-lived intangible assets	1,640	1,499
Backlog
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount, Finite-lived intangible assets	300	0
Accumulated Amortization, Finite-lived intangible assets	300	0
Trademarks
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount, Indefinite-lived intangible assets	51,295	45,770
Accumulated Amortization, Indefinite-lived intangible assets	$ 0	$ 0

Goodwill and Related Intangible Assets (Schedule of Amortization Expense) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Goodwill and Intangible Assets Disclosure [Abstract]
Amortization expense	$ 2,412	$ 1,797	$ 4,490	$ 3,594
2020	3,860		3,860
2021	7,633		7,633
2022	7,154		7,154
2023	6,617		6,617
2024	6,363		6,363
2025	$ 6,203		$ 6,203

Long-Term Debt (Narrative) (Details)	6 Months Ended
Long-Term Debt (Narrative) (Details)	Jun. 30, 2020 USD ($) covenant	Dec. 31, 2019 USD ($)	Jan. 24, 2019 USD ($)
Debt Instrument [Line Items]
Carrying value of outstanding debt	$ 0	$ 0
Revolving Credit Facility \| Senior Credit Agreement
Debt Instrument [Line Items]
Revolving credit facility, availability amount	394,100,000
Borrowings outstanding	0	$ 0
Standby Letters of Credit \| Senior Credit Agreement
Debt Instrument [Line Items]
Letters of credit issued	$ 5,900,000
Line of Credit \| 2019 Senior Credit Agreement
Debt Instrument [Line Items]
Current borrowing capacity			$ 400,000,000
Letters of credit issued			700,000,000
Number of debt covenants \| covenant	3
Medium-term Notes \| 2019 Senior Credit Agreement
Debt Instrument [Line Items]
Debt instrument, issued value			$ 300,000,000

Accumulated Other Comprehensive (Loss) Income (Details) - USD ($) $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2020	Mar. 31, 2020	Jun. 30, 2019	Mar. 31, 2019	Jun. 30, 2020	Jun. 30, 2019
AOCI Attributable to Parent, Net of Tax [Roll Forward]
AOCI before tax, beginning balance	$ (11,985)	$ (6,112)	$ (7,121)	$ (7,979)	$ (6,112)	$ (7,979)
Accumulated other comprehensive income, tax, beginning balance	(714)	(721)	(741)	(745)	(721)	(745)
Accumulated Other Comprehensive Income Beginning Balance	(11,271)	(5,391)	(6,380)	(7,234)	(5,391)	(7,234)
Other comprehensive income (loss), net of tax	2,833		1,010		(3,047)	1,864
AOCI before tax, ending balance	(9,146)	(11,985)	(6,106)	(7,121)	(9,146)	(6,106)
Accumulated other comprehensive income, tax, ending balance	(708)	(714)	(736)	(741)	(708)	(736)
Accumulated Other Comprehensive Income Ending Balance	(8,438)	(11,271)	(5,370)	(6,380)	(8,438)	(5,370)
Accumulated Translation Adjustment
AOCI Attributable to Parent, Net of Tax [Roll Forward]
AOCI before tax, beginning balance	(10,071)	(4,173)	(5,097)	(5,939)	(4,173)	(5,939)
Other comprehensive income adjustments	2,815	(5,898)	998	842
Other comprehensive income (loss), net of tax	2,815	(5,898)	998	842
AOCI before tax, ending balance	(7,256)	(10,071)	(4,099)	(5,097)	(7,256)	(4,099)
Accumulated Defined Benefit Plans Adjustment
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Other comprehensive income adjustments	24	25	17	16
Other comprehensive income (loss), tax	6	7	5	4
Other comprehensive income (loss), net of tax	18	18	12	12
Minimum pension and post retirement benefit plan adjustments \| Accumulated Defined Benefit Plans Adjustment
AOCI Attributable to Parent, Net of Tax [Roll Forward]
AOCI before tax, beginning balance	(1,914)	(1,939)	(2,024)	(2,040)	(1,939)	(2,040)
Other comprehensive income adjustments	24	25	17	16
AOCI before tax, ending balance	$ (1,890)	$ (1,914)	$ (2,007)	$ (2,024)	$ (1,890)	$ (2,007)

Equity-Based Compensation - Incentive Plan (Details)	May 04, 2018 shares
2018 Plan \| Common Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized (in shares)	1,000,000

Equity-Based Compensation (Schedule of Number of Awards and Weighted Average Grant Date Fair Value) (Details) - $ / shares	3 Months Ended	6 Months Ended
	Mar. 31, 2022	Jun. 30, 2020	Jun. 30, 2019
Performance stock units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of awards (in shares)		127,397	145,420
Weighted average grant date fair value (in USD per share)		$ 53.16	$ 40.55
Restricted stock units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of awards (in shares)		43,842	117,821
Weighted average grant date fair value (in USD per share)		$ 52.12	$ 39.37
Deferred stock units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of awards (in shares)		12,402	7,509
Weighted average grant date fair value (in USD per share)		$ 45.98	$ 37.95
Common shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of awards (in shares)		4,134	7,509
Weighted average grant date fair value (in USD per share)		$ 45.98	$ 37.95
2018 Plan \| Performance stock units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares to be issued on conversion as percentage of total award		116.00%
2018 Plan \| Scenario, Forecast \| Performance stock units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares to be issued on conversion (in shares)	168,688
Minimum \| Performance stock units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grants based on targeted thresholds, percent		0.00%
Maximum \| Performance stock units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grants based on targeted thresholds, percent		200.00%
Return on Invested Capital \| 2018 Plan \| Performance stock units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Performance period		1 year
Gross Profit Threshold \| Minimum \| 2018 Plan \| Performance stock units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Performance period		2 years
Gross Profit Threshold \| Maximum \| 2018 Plan \| Performance stock units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Performance period		3 years
Total Shareholder Return \| 2018 Plan \| Performance stock units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Performance period		3 years

Equity-Based Compensation (Equity Based Awards - Settled in Cash) (Details) - USD ($)	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Accrued equity based compensation	$ 29,200,000		$ 28,000,000.0
Non Current Liabilities
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Accrued equity based compensation	12,700,000		$ 13,200,000
Management Stock Purchase Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based liabilities paid (in thousands)	$ 4,433,000	$ 5,742,000
Management Stock Purchase Plan \| Restricted stock units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Average company stock price measurement period	200 days
Restricted stock units credited (in shares)	$ 52,965	$ 55,513

Exit Activity Costs and Asset Impairments (Narrative) (Details) $ in Thousands		6 Months Ended
	Jun. 30, 2020 USD ($)	Jun. 30, 2020 USD ($) facility	Jun. 30, 2019 USD ($) facility
Restructuring and Related Activities [Abstract]
Number of facilities closed \| facility		1	0
Restructuring Cost and Reserve [Line Items]
Gain on sale of business		$ 1,881	$ 0
Apartment Tour Application Business
Restructuring Cost and Reserve [Line Items]
Proceeds from sale of business	$ 2,000
Gain on sale of business	$ 1,900

Exit Activity Costs and Asset Impairments (Summary of Exit Activity Costs and Asset Impairments by Segment) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Restructuring Cost and Reserve [Line Items]
Inventory write-downs &/or asset impairment charges	$ 346	$ 0	$ 346	$ 0
Exit activity costs	664	2,136	955	2,355
Total	1,010	2,136	1,301	2,355
Renewable Energy and Conservation
Restructuring Cost and Reserve [Line Items]
Inventory write-downs &/or asset impairment charges	72	0	72	0
Exit activity costs	316	(95)	334	(1)
Total	388	(95)	406	(1)
Residential Products
Restructuring Cost and Reserve [Line Items]
Inventory write-downs &/or asset impairment charges	0	0	0	0
Exit activity costs	263	219	484	370
Total	263	219	484	370
Industrial and Infrastructure Products
Restructuring Cost and Reserve [Line Items]
Inventory write-downs &/or asset impairment charges	274	0	274	0
Exit activity costs	40	1,346	38	1,313
Total	314	1,346	312	1,313
Corporate
Restructuring Cost and Reserve [Line Items]
Inventory write-downs &/or asset impairment charges	0	0	0	0
Exit activity costs	45	666	99	673
Total	$ 45	$ 666	$ 99	$ 673

Exit Activity Costs and Asset Impairments (Summary of Exit Activity Costs and Asset Impairments) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Restructuring Cost and Reserve [Line Items]
Total	$ 1,010	$ 2,136	$ 1,301	$ 2,355
Exit activity costs	664	2,136	955	2,355
Cost of sales
Restructuring Cost and Reserve [Line Items]
Total	786	319	873	285
Selling, general, and administrative expense
Restructuring Cost and Reserve [Line Items]
Total	$ 224	$ 1,817	$ 428	$ 2,070

Exit Activity Costs and Asset Impairments (Reconciles of Liability for Exit Activity Costs Relating to Facility Consolidation Efforts) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Restructuring Reserve [Roll Forward]
Beginning balance			$ 5,449	$ 1,923
Exit activity costs	$ 664	$ 2,136	955	2,355
Cash payments			(5,575)	(1,329)
Ending balance	$ 829	$ 2,949	$ 829	$ 2,949

Income Taxes (Provision For Income Taxes For Continuing Operations) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Income Tax Disclosure [Abstract]
Provision for income taxes	$ 8,872	$ 6,487	$ 11,858	$ 8,058
Effective tax rate	24.50%	24.60%	23.20%	23.50%

- Definition

Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

+ References + Details

Earnings per Share (Details) - USD ($) $ in Thousands	3 Months Ended				6 Months Ended
Earnings per Share (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Mar. 31, 2020	Jun. 30, 2019	Mar. 31, 2019	Jun. 30, 2020	Jun. 30, 2019
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Net income	$ 27,292	$ 12,059	$ 19,913	$ 6,345	$ 39,351	$ 26,258
Weighted average basic shares outstanding (in shares)	32,605,000		32,321,000		32,596,000	32,300,000
Common stock options and restricted stock (in shares)	255,000		321,000		272,000	330,000
Weighted average shares outstanding, diluted (in shares)	32,860,000		32,642,000		32,868,000	32,630,000
Common shares
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from earnings per share calculation (in shares)	77,000		366,000		47,000	312,000

- Definition

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

+ References

+ Details

Segment Information (Details) $ in Thousands	3 Months Ended		6 Months Ended
Segment Information (Details) $ in Thousands	Jun. 30, 2020 USD ($)	Jun. 30, 2019 USD ($)	Jun. 30, 2020 USD ($) segment	Jun. 30, 2019 USD ($)
Segment Reporting, Other Significant Reconciling Item [Line Items]
Number of reportable segments \| segment			3
Net Sales	$ 285,814	$ 262,655	$ 535,253	$ 490,072
Total consolidated income from operations	34,591	26,606	49,781	37,172
Renewable Energy and Conservation
Segment Reporting, Other Significant Reconciling Item [Line Items]
Net Sales	98,259	76,004	194,756	144,841
Residential Products
Segment Reporting, Other Significant Reconciling Item [Line Items]
Net Sales	139,472	130,433	242,891	234,142
Industrial and Infrastructure Products
Segment Reporting, Other Significant Reconciling Item [Line Items]
Net Sales	48,083	56,218	97,606	111,089
Operating Segments \| Renewable Energy and Conservation
Segment Reporting, Other Significant Reconciling Item [Line Items]
Net Sales	98,259	76,004	194,756	144,841
Total consolidated income from operations	9,188	9,649	14,887	11,281
Operating Segments \| Residential Products
Segment Reporting, Other Significant Reconciling Item [Line Items]
Net Sales	139,472	130,433	242,891	234,142
Total consolidated income from operations	27,964	20,778	41,689	32,868
Operating Segments \| Industrial and Infrastructure Products
Segment Reporting, Other Significant Reconciling Item [Line Items]
Net Sales	48,263	56,547	98,064	111,735
Total consolidated income from operations	6,644	4,069	10,633	8,198
Intersegment Elimination
Segment Reporting, Other Significant Reconciling Item [Line Items]
Net Sales	(180)	(329)	(458)	(646)
Corporate
Segment Reporting, Other Significant Reconciling Item [Line Items]
Unallocated Corporate Expenses	$ (9,205)	$ (7,890)	$ (17,428)	$ (15,175)

Segment Information - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Disaggregation of Revenue [Line Items]
Net Sales	$ 285,814	$ 262,655	$ 535,253	$ 490,072
Renewable Energy and Conservation
Disaggregation of Revenue [Line Items]
Net Sales	98,259	76,004	194,756	144,841
Residential Products
Disaggregation of Revenue [Line Items]
Net Sales	139,472	130,433	242,891	234,142
Industrial and Infrastructure Products
Disaggregation of Revenue [Line Items]
Net Sales	48,083	56,218	97,606	111,089
Point in Time
Disaggregation of Revenue [Line Items]
Net Sales	187,883	184,350	344,297	339,819
Point in Time \| Renewable Energy and Conservation
Disaggregation of Revenue [Line Items]
Net Sales	12,416	8,469	27,004	15,759
Point in Time \| Residential Products
Disaggregation of Revenue [Line Items]
Net Sales	138,288	129,566	240,619	232,458
Point in Time \| Industrial and Infrastructure Products
Disaggregation of Revenue [Line Items]
Net Sales	37,179	46,315	76,674	91,602
Over Time
Disaggregation of Revenue [Line Items]
Net Sales	97,931	78,305	190,956	150,253
Over Time \| Renewable Energy and Conservation
Disaggregation of Revenue [Line Items]
Net Sales	85,843	67,535	167,752	129,082
Over Time \| Residential Products
Disaggregation of Revenue [Line Items]
Net Sales	1,184	867	2,272	1,684
Over Time \| Industrial and Infrastructure Products
Disaggregation of Revenue [Line Items]
Net Sales	$ 10,904	$ 9,903	$ 20,932	$ 19,487

- Definition

Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

+ References

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+ Details