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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 |

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