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Business Combinations - Summary of Estimated Fair Value of Assets Acquired and Liabilities Assumed (Detail) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Business Acquisition [Line Items] |  |  |
Cash | $ 334 |  | $ 247
Accounts receivable | 5,205 | $ 5,835 | 34,921
Inventories | 2,666 | 2,215 | 4,396
Other current assets | 3 | 946 | 4,640
Property and equipment | 2,987 | 5,984 | 4,647
Intangibles | 28,041 | 36,085 | 76,816
Goodwill | 22,405 | 17,079 | 47,842
Other non-current assets | 531 | 131 | 638
Accounts payable and other current liabilities | (2,589) | (2,995) | (20,793)
Fair value of assets acquired and purchase price | 59,583 | 65,280 | 153,354
Less fair value of common stock issued |  |  | 10,859
Less seller obligations | 7,543 | 7,540 | 5,128
Cash paid | 52,040 | 57,740 | 137,367
First State Insulation [Member] |  |  |
Business Acquisition [Line Items] |  |  |
Inventories | 291 |  |
Property and equipment | 989 |  |
Intangibles | 3,382 |  |
Goodwill | 1,857 |  |
Accounts payable and other current liabilities | (39) |  |
Fair value of assets acquired and purchase price | 6,480 |  |
Less seller obligations | 1,355 |  |
Cash paid | 5,125 |  |
Expert Insulation [Member] |  |  |
Business Acquisition [Line Items] |  |  |
Accounts receivable | 1,796 |  |
Inventories | 723 |  |
Property and equipment | 235 |  |
Intangibles | 6,740 |  |
Goodwill | 8,545 |  |
Other non-current assets | 161 |  |
Accounts payable and other current liabilities | (42) |  |
Fair value of assets acquired and purchase price | 18,158 |  |
Less seller obligations | 1,993 |  |
Cash paid | 16,165 |  |
Premier [Member] |  |  |
Business Acquisition [Line Items] |  |  |
Cash | 334 |  |
Accounts receivable | 2,930 |  |
Inventories | 1,242 |  |
Property and equipment | 876 |  |
Intangibles | 14,300 |  |
Goodwill | 10,238 |  |
Other non-current assets | 329 |  |
Accounts payable and other current liabilities | (2,484) |  |
Fair value of assets acquired and purchase price | 27,765 |  |
Less seller obligations | 2,765 |  |
Cash paid | 25,000 |  |
CDG Acquisition [Member] |  |  |
Business Acquisition [Line Items] |  |  |
Accounts receivable |  | 1,731 |
Inventories |  | 514 |
Other current assets |  | 28 |
Property and equipment |  | 933 |
Intangibles |  | 3,711 |
Goodwill |  | 4,898 |
Other non-current assets |  | 36 |
Accounts payable and other current liabilities |  | (438) |
Fair value of assets acquired and purchase price |  | 11,413 |
Less seller obligations |  | 1,973 |
Cash paid |  | 9,440 |
AFT Acquisition [Member] |  |  |
Business Acquisition [Line Items] |  |  |
Inventories |  | 565 |
Property and equipment |  | 2,882 |
Intangibles |  | 13,470 |
Goodwill |  | 4,415 |
Other non-current assets |  | 13 |
Accounts payable and other current liabilities |  | (128) |
Fair value of assets acquired and purchase price |  | 21,217 |
Less seller obligations |  | 1,510 |
Cash paid |  | 19,707 |
Alpha [Member] |  |  |
Business Acquisition [Line Items] |  |  |
Cash |  |  | 247
Accounts receivable |  |  | 29,851
Inventories |  |  | 1,852
Other current assets |  |  | 4,500
Property and equipment |  |  | 1,528
Intangibles |  |  | 57,200
Goodwill |  |  | 38,511
Other non-current assets |  |  | 383
Accounts payable and other current liabilities |  |  | (17,401)
Fair value of assets acquired and purchase price |  |  | 116,671
Less fair value of common stock issued |  |  | 10,859
Less seller obligations |  |  | 2,002
Cash paid |  |  | 103,810
Columbia [Member] |  |  |
Business Acquisition [Line Items] |  |  |
Accounts receivable |  |  | 989
Inventories |  |  | 704
Other current assets |  |  | 8
Property and equipment |  |  | 659
Intangibles |  |  | 4,760
Goodwill |  |  | 2,209
Other non-current assets |  |  | 36
Accounts payable and other current liabilities |  |  | (372)
Fair value of assets acquired and purchase price |  |  | 8,993
Less seller obligations |  |  | 225
Cash paid |  |  | 8,768
Astro [Member] |  |  |
Business Acquisition [Line Items] |  |  |
Accounts receivable |  |  | 924
Inventories |  |  | 296
Other current assets |  |  | 36
Property and equipment |  |  | 640
Intangibles |  |  | 5,168
Goodwill |  |  | 2,932
Accounts payable and other current liabilities |  |  | (370)
Fair value of assets acquired and purchase price |  |  | 9,626
Less seller obligations |  |  | 482
Cash paid |  |  | 9,144
Other Acquisition [Member] |  |  |
Business Acquisition [Line Items] |  |  |
Accounts receivable | 479 | 4,104 | 3,157
Inventories | 410 | 1,136 | 1,544
Other current assets | 3 | 918 | 96
Property and equipment | 887 | 2,169 | 1,820
Intangibles | 3,619 | 18,904 | 9,688
Goodwill | 1,765 | 7,766 | 4,190
Other non-current assets | 41 | 82 | 219
Accounts payable and other current liabilities | (24) | (2,429) | (2,650)
Fair value of assets acquired and purchase price | 7,180 | 32,650 | 18,064
Less seller obligations | 1,430 | 4,057 | 2,419
Cash paid | $ 5,750 | $ 28,593 | $ 15,645

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