Long-Term Debt and Credit Facility - Long-Term Debt (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Long-term Debt
Unamortized discount	$ (1,770)	$ (2,448)
Unamortized deferred financing costs	(2,952)	(4,234)
Total long-term debt	307,778	305,818
Long-term debt, net of current maturities	$ 307,778	305,818
First Lien Credit Facility
Long-term Debt
Interest rate (as a percent)	6.71%
Long-term debt	$ 312,500	$ 312,500