Accrued Expenses and Other Current Liabilities - Summary of Accrued Expenses and Other Current Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Accounts Payable and Accrued Liabilities, Current [Abstract]
Accrued expenses	$ 53,139	$ 44,711
Derivative instruments	1,783	3,204
Client liabilities	6,378	6,933
Other current liabilities	9,723	9,321
Accrued expenses and other current liabilities	$ 71,023	$ 64,169