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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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Acquisitions (Schedule of Acquired Intangible Assets) (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2021	Dec. 31, 2020
Technology \| Minimum
Business Acquisition [Line Items]
Weighted-Average Amortization Period	7 years
Technology \| Maximum
Business Acquisition [Line Items]
Weighted-Average Amortization Period	15 years
Customer relationships \| Minimum
Business Acquisition [Line Items]
Weighted-Average Amortization Period	5 years
Customer relationships \| Maximum
Business Acquisition [Line Items]
Weighted-Average Amortization Period	13 years
Backlog
Business Acquisition [Line Items]
Weighted-Average Amortization Period	1 year
TerraSmart LLC
Business Acquisition [Line Items]
Fair Value		$ 51,700
TerraSmart LLC \| Trademarks
Business Acquisition [Line Items]
Fair Value		16,400
TerraSmart LLC \| Trademarks
Business Acquisition [Line Items]
Fair Value		$ 300
Weighted-Average Amortization Period		7 years
TerraSmart LLC \| Technology
Business Acquisition [Line Items]
Fair Value		$ 2,500
Weighted-Average Amortization Period		15 years
TerraSmart LLC \| Customer relationships
Business Acquisition [Line Items]
Fair Value		$ 24,000
Weighted-Average Amortization Period		10 years
TerraSmart LLC \| Non-compete agreements
Business Acquisition [Line Items]
Fair Value		$ 2,200
Weighted-Average Amortization Period		5 years
TerraSmart LLC \| Backlog
Business Acquisition [Line Items]
Fair Value		$ 6,300
Sunfig Corporation, Architectural Mailboxes, LLC, Delta Separations, LLC, and Thermo Energy Systems Inc.
Business Acquisition [Line Items]
Fair Value	$ 38,296
Sunfig Corporation, Architectural Mailboxes, LLC, Delta Separations, LLC, and Thermo Energy Systems Inc. \| Trademarks
Business Acquisition [Line Items]
Fair Value	8,200
Sunfig Corporation, Architectural Mailboxes, LLC, Delta Separations, LLC, and Thermo Energy Systems Inc. \| Trademarks
Business Acquisition [Line Items]
Fair Value	$ 1,177
Weighted-Average Amortization Period	3 years
Sunfig Corporation, Architectural Mailboxes, LLC, Delta Separations, LLC, and Thermo Energy Systems Inc. \| Technology
Business Acquisition [Line Items]
Fair Value	$ 8,175
Sunfig Corporation, Architectural Mailboxes, LLC, Delta Separations, LLC, and Thermo Energy Systems Inc. \| Customer relationships
Business Acquisition [Line Items]
Fair Value	18,780
Sunfig Corporation, Architectural Mailboxes, LLC, Delta Separations, LLC, and Thermo Energy Systems Inc. \| Non-compete agreements
Business Acquisition [Line Items]
Fair Value	$ 1,036
Weighted-Average Amortization Period	5 years
Sunfig Corporation, Architectural Mailboxes, LLC, Delta Separations, LLC, and Thermo Energy Systems Inc. \| Backlog
Business Acquisition [Line Items]
Fair Value	$ 928