Revenue from Contracts with Customers - Summary of Revenue Recognized on Various Performance Obligations and Elected Accounting Expedients (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Revenue From Contract With Customer [Abstract]
Revenue related to deferred revenue balance at beginning of period	$ 36,151	$ 29,401
Revenue related to new performance obligations satisfied during the period	45,306	47,263
Revenue recognized under "right-to-invoice" expedient	61,114	56,811
Reimbursed travel expenses, shipping and other revenue	101	177
Total revenue	$ 142,672	$ 133,652