Accrued Expenses and Other Liabilities (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Payables and Accruals [Abstract]
Accrued employee compensation	$ 26,903	$ 28,698
Operating lease obligations	8,620	9,202
Accrued interest	8,921	6,054
Accrued professional fees	9,974	5,837
Other accrued expenses	43,876	47,439
Total	$ 98,294	$ 97,230