Long-Term Debt and Subordinated Credit Facility (Details 2) $ in Thousands			3 Months Ended		9 Months Ended
	Oct. 15, 2015 USD ($)	Aug. 17, 2015 USD ($)	Sep. 30, 2015 USD ($) item	Sep. 30, 2014 USD ($)	Sep. 30, 2015 USD ($) item	Sep. 30, 2014 USD ($)
Long-term Debt
Loss on early extinguishment of debt			$ (703)	$ (476)	$ (703)	$ (476)
First Lien Credit Facility
Long-term Debt
Maximum net leverage ratio		7.00
Senior Term Loan
Long-term Debt
Amount repaid		$ 158,420
Amount outstanding			0		0
Loss on early extinguishment of debt		(703)
Term Loan | First Lien Credit Facility
Long-term Debt
Maximum borrowing capacity		$ 435,000
Term Loan | First Lien Credit Facility | Subsequent Event [Member]
Long-term Debt
Amount repaid	$ 112,500
Term Loan | Eurodollar rate | First Lien Credit Facility
Long-term Debt
Applicable margin over reference rate (as a percent)		4.50%
Term Loan | Base rate | First Lien Credit Facility
Long-term Debt
Applicable margin over reference rate (as a percent)		3.50%
Revolving Credit Facility | First Lien Credit Facility
Long-term Debt
Maximum borrowing capacity		$ 40,000	39,900		39,900
Fronting fee for letters of credit (as a percent)		0.125%
Amount drawn to trigger net leverage requirement (as a percent)		50.00%
Letters of credit outstanding			$ 100		$ 100
Number of outstanding letters of credit | item			2		2
Number of real property lease agreements secured by letters of credit | item					2
Fee on outstanding letters of credit (as a percent)					4.50%
Revolving Credit Facility | First Lien Credit Facility | Minimum
Long-term Debt
Unused commitment fee (as a percent)		0.375%
Revolving Credit Facility | First Lien Credit Facility | Maximum
Long-term Debt
Unused commitment fee (as a percent)		0.50%
Sellers Note
Long-term Debt
Promissory note			$ 9,000		$ 9,000