Summary of Significant Accounting Policies - Allowance for Doubtful Accounts and Other Accounts Receivable Allowances (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Allowance For Doubtful Accounts Receivable Rollforward
Allowance, balance at the beginning	$ 10,133	$ 9,325	$ 9,654
Provision charged to income	943	864	29
Accounts written off, net of recoveries	(919)	(56)	(358)
Allowance, balance at ending	$ 10,157	$ 10,133	$ 9,325