Goodwill and Intangible Assets - Summary of Company's Intangible Assets (Detail) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Finite Lived Intangible Assets [Line Items]
Cost	$ 107,512	$ 109,246
Accumulated amortization	(16,567)	(13,892)
Net carrying amount	90,945	95,354
Customer Relationships [Member]
Finite Lived Intangible Assets [Line Items]
Cost	100,962	102,696
Accumulated amortization	(10,044)	(7,369)
Net carrying amount	90,918	95,327
Technology and Other Intangibles [Member]
Finite Lived Intangible Assets [Line Items]
Cost	6,550	6,550
Accumulated amortization	(6,523)	(6,523)
Net carrying amount	$ 27	$ 27