Accounts Payable and Accrued Expenses (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Payables and Accruals [Abstract]
Accounts payable	$ 32,982	$ 23,573
Accrued payroll and related expenses	20,311	19,699
Accrued subcontractor fees	13,812	12,203
Accrued agency fees	3,962	5,048
Accrued legal and professional fees	1,687	1,833
Other accrued expenses	1,274	1,500
Accounts payable and accrued expenses	$ 74,028	$ 63,856