Basis of Presentation and Summary of Significant Accounting Policies - Schedule of Changes in Accounts Receivable Allowance for Credit Losses (Detail) - USD ($) $ in Thousands		12 Months Ended
	Sep. 30, 2021	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Accounts receivable, allowance for credit loss [Roll Forward]
Beginning balance		$ 7,253	$ 3,920	$ 2,973
Accounting Standards Update [Extensible List]	us-gaap:AccountingStandardsUpdate202004Member	us-gaap:AccountingStandardsUpdate201912Member	us-gaap:AccountingStandardsUpdate201613Member	us-gaap:AccountingStandardsUpdate201602Member
Add: bad debt expense		$ 1,456	$ 3,149	$ 2,702
Less: write-offs, net of recoveries		(1,335)	(369)	(1,755)
Ending balance		$ 7,374	7,253	3,920
Cumulative Effect, Period of Adoption, Adjustment
Accounts receivable, allowance for credit loss [Roll Forward]
Beginning balance			$ 553
Accounting Standards Update [Extensible List]			us-gaap:AccountingStandardsUpdate201613Member
Ending balance				$ 553