Other Liabilities and Accrued Expenses - Table of Other Liabilities and Accrued Expenses (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Other Liabilities Disclosure [Abstract]
Accounts payable and accrued expenses	$ 63,755	$ 52,032
Deferred tax liabilities, net	25,433	22,744
Due to brokers	486	8,669
Commissions payable	11,076	14,185
Accrued interest payable	3,452	3,393
Escrow payable	460	6,753
Other	19,528	13,545
Total other liabilities and accrued expenses	$ 124,190	$ 121,321