Debt (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Senior debt:
Less: Debt issuance costs and discount	$ (3,123)	$ (3,485)
Total debt, net of debt issuance costs and discount	188,484	199,410
Less: Current maturities	(10,012)	(9,950)
Long-term debt, net of current maturities	178,472	189,460
Revolving credit facility
Senior debt:
Total debt	147,037	147,037
Term loans
Senior debt:
Total debt	44,570	55,858
ABL Facility
Senior debt:
Total debt	$ 191,607	$ 202,895