Other Accrued Expenses (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Payables And Accruals [Abstract]
Accrued personnel costs	$ 5,808	$ 15,850
Accrued interest payable	299	2,096
Income tax payable	629	556
Accrued corporate legal fees and professional services	1,467	589
Accrued expenses - other	880	396
Other accrued expenses	$ 9,083	$ 19,487