Long-Term Debt and Credit Facility - Long-Term Debt (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014	Sep. 02, 2014
Debt Instrument [Line Items]
Long-term debt	$ 321,500
Unamortized discount	(4,459)	$ (442)
Unamortized deferred financing costs	(8,041)	(614)
Total long-term debt	309,000	178,810
Less current maturities of long-term debt	(9,000)	(6,326)
Long-term debt, excluding current maturities	$ 300,000	172,484
Sellers Note
Debt Instrument [Line Items]
Interest rate (as a percent)	5.00%		5.00%
Long-term debt	$ 9,000	$ 9,000
First Lien Credit Facility
Debt Instrument [Line Items]
Interest rate (as a percent)	5.50%
Long-term debt	$ 312,500
Senior Term Loan
Debt Instrument [Line Items]
Interest rate (as a percent)		3.91%
Long-term debt		$ 170,866