Accounts Payable and Other Accrued Liabilities - Summary of Accounts Payable and Other Accrued Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Payables And Accruals [Abstract]
Accounts payable	$ 17,233	$ 15,481
Accrued expenses	15,703	11,469
Other business acquisitions purchase price obligations	274	50
Contract liabilities	8,037	6,114
Other current liabilities	1,126	1,507
Income tax payable		256
Total accounts payable and other accrued liabilities	$ 42,373	$ 34,877