Other Current Liabilities - Schedule of Other Current Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Other Liabilities Disclosure [Abstract]
Accrued expenses	$ 5,080	$ 6,919
Accrued interest	1,315	18,093
Accrued other	13,584	12,258
Total other current liabilities	$ 19,979	$ 37,270