Goodwill and Intangible Assets - Summary of Company's Intangible Assets (Detail) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Finite Lived Intangible Assets [Line Items]
Cost	$ 109,246	$ 70,972
Accumulated amortization	(13,892)	(9,986)
Net carrying amount	95,354	60,986
Technology [Member]
Finite Lived Intangible Assets [Line Items]
Cost	5,770	5,770
Accumulated amortization	(5,770)	(5,770)
Customer Relationships [Member]
Finite Lived Intangible Assets [Line Items]
Cost	102,696	64,332
Accumulated amortization	(7,369)	(3,451)
Net carrying amount	95,327	60,881
Non-Competition Agreements [Member]
Finite Lived Intangible Assets [Line Items]
Cost	380	380
Accumulated amortization	(380)	(380)
Tradenames and Patents [Member]
Finite Lived Intangible Assets [Line Items]
Cost	400	490
Accumulated amortization	(373)	(385)
Net carrying amount	$ 27	$ 105