Business Combinations - Summary of Estimated Fair Value of Assets Acquired and Liabilities Assumed (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Business Acquisition [Line Items]
Accounts receivable	$ 2,848
Inventories	375
Other current assets	441
Property and equipment	746
Intangibles	4,512
Goodwill	3,192
Other non-current assets	66
Accounts payable and other current liabilities	(1,074)
Deferred income tax liabilities	(35)
Fair value of assets acquired and purchase price	11,071
Less seller obligations	2,570
Cash paid	8,501
Royals [Member]
Business Acquisition [Line Items]
Accounts receivable	2,848
Inventories	305
Other current assets	430
Property and equipment	627
Intangibles	3,930
Goodwill	2,986
Other non-current assets	58
Accounts payable and other current liabilities	(1,059)
Deferred income tax liabilities	(35)
Fair value of assets acquired and purchase price	10,090
Less seller obligations	2,500
Cash paid	7,590
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
Other Acquisition [Member]
Business Acquisition [Line Items]
Inventories	70
Other current assets	11
Property and equipment	119
Intangibles	582
Goodwill	206
Other non-current assets	8
Accounts payable and other current liabilities	(15)
Fair value of assets acquired and purchase price	981
Less seller obligations	70
Cash paid	$ 911