Valuation and Qualifying Accounts - Summary of Valuation and Qualifying Accounts (Detail) - Allowance for Uncollectible Accounts [Member] - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance, beginning of period	$ 5,666	$ 3,742	$ 4,028
Additions - Charged to costs and expenses	3,559	4,271	2,804
Deductions	(3,695)	(2,347)	(3,090)
Balance, end of period	$ 5,530	$ 5,666	$ 3,742