Long-Term Debt and Credit Facility - Letters of Credit (Details) $ in Thousands			12 Months Ended
	Aug. 17, 2015 USD ($)	Sep. 02, 2014 USD ($)	Dec. 31, 2015 USD ($) item	Dec. 31, 2014 USD ($)
Long-term Debt
Loss on early extinguishment of debt			$ (703)	$ (476)
First Lien Credit Facility
Long-term Debt
Fronting fee for letters of credit (as a percent)	0.125%
Senior Term Loan
Long-term Debt
Loss on early extinguishment of debt	$ (703)	$ (476)
Term Loan | First Lien Credit Facility
Long-term Debt
Maximum borrowing capacity	435,000
Revolving Credit Facility | First Lien Credit Facility
Long-term Debt
Number of outstanding letters of credit | item			2
Number of real property lease agreements secured by letters of credit | item			2
Letters of credit outstanding			$ 100
Remaining borrowing capacity			$ 39,900
Fee on outstanding letters of credit (as a percent)			4.50%
Fronting fee for letters of credit (as a percent)			0.125%
Maximum borrowing capacity	$ 40,000