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Business Combinations - Summary of Business Acquisitions (Detail) - USD ($) $ in Thousands | 3 Months Ended
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Mar. 31, 2020 | Mar. 31, 2019
Business Acquisition [Line Items] |  |
Cash paid | $ 8,501 |
Seller Obligations | 2,570 |
Total Purchase Price | 11,071 |
Revenue | 397,331 | $ 342,135
Net Income | $ 15,988 | $ 8,834
Royals [Member] |  |
Business Acquisition [Line Items] |  |
Date | Feb. 29, 2020 |
Acquisition Type | Asset |
Cash paid | $ 7,590 |
Seller Obligations | 2,500 |
Total Purchase Price | 10,090 |
Revenue | 784 |
Net Income | $ (87) |
First State Insulation [Member] |  |
Business Acquisition [Line Items] |  |
Date |  | Mar. 18, 2019
Acquisition Type |  | Asset
Cash paid |  | $ 5,125
Seller Obligations |  | 1,355
Total Purchase Price |  | 6,480
Revenue |  | 488
Net Income |  | $ 23
Other Acquisition [Member] |  |
Business Acquisition [Line Items] |  |
Date | Jan. 13, 2020 |
Acquisition Type | Asset |
Cash paid | $ 911 |
Seller Obligations | 70 |
Total Purchase Price | 981 |
Revenue | 226 |
Net Income | (21) |
2020 Acquisitions [Member] |  |
Business Acquisition [Line Items] |  |
Revenue | 1,010 |
Net Income | $ (108) |

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