Accrued Expenses and Other Current Liabilities - Schedule of Accrued Expenses and Other Current Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Payables And Accruals [Abstract]
Deposits	$ 9,608	$ 17,485
Accrued IT and software licensing costs	3,983	3,359
Accrued taxes and insurance premiums	3,498	4,160
Accrued facilities rental and lease exit costs	1,223	2,271
Accrued interest	693	308
Accrued professional services	3,929	1,828
Accrued dividends	2,639	2,639
Contingent and contractual liabilities from acquisitions	2,700	2,323
Other accrued expenses and current liabilities	7,469	4,699
Total accrued expenses and other current liabilities	$ 35,742	$ 39,072