Accrued Expenses and Other Liabilities (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Payables and Accruals [Abstract]
Accrued employee compensation	$ 35,393	$ 39,738
Operating lease obligations	9,462	7,857
Accrued interest	12,942	8,436
Accrued professional fees	12,185	9,199
Other accrued expenses	33,782	33,406
Total	$ 103,764	$ 98,636