Valuation and Qualifying Accounts (Detail) - Allowance For Credit Losses - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Valuation And Qualifying Accounts Disclosure [Line Items]
Beginning Balance		$ 10,842	$ 6,516	$ 2,312
Charged to Costs and Expenses		(1,500)	5,606	5,683
Deductions	[1]	(849)	(1,280)	(1,479)
Ending Balance		$ 8,493	$ 10,842	$ 6,516

[1] Consists of uncollectible accounts written-off.