Subsequent Events (Details) - USD ($)			3 Months Ended		6 Months Ended
	Jul. 31, 2015	Apr. 20, 2012	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Debt refinancing
Extinguishment of debt			$ 638,000	$ 2,886,000	$ 638,000	$ 2,886,000
First Lien Credit Agreement | Subsequent Event
Debt refinancing
Extinguishment of debt	$ 1,100,000
Write-off of unamortized deferred financing fees	1,000,000
Loss on original issue discount	100,000
Term Loan | First Lien Credit Agreement
Debt refinancing
Payments on debt			223,000,000
Face amount of debt		$ 345,000,000
Extinguishment of debt			638,000
Write-off of unamortized deferred financing fees			489,000
Loss on original issue discount			$ 149,000
Term of debt instrument		6 years
Term Loan | First Lien Credit Agreement | Subsequent Event
Debt refinancing
Payments on debt	183,200,000
Term Loan | 2015 Credit Agreement | Subsequent Event
Debt refinancing
Face amount of debt	$ 185,000,000
Term of debt instrument	5 years
Frequency of periodic payment	quarterly
Periodic payment required	$ 2,300,000
Commencement date of payments	Dec. 31, 2015
Revolving Credit Facility | First Lien Credit Agreement
Debt refinancing
Maximum borrowing capacity		$ 30,000,000
Term of debt instrument		6 years
Revolving Credit Facility | First Lien Credit Agreement | Subsequent Event
Debt refinancing
Maximum borrowing capacity	$ 30,000,000
Revolving Credit Facility | 2015 Credit Agreement | Subsequent Event
Debt refinancing
Maximum borrowing capacity	$ 75,000,000
Term of debt instrument	5 years
Revolving Credit Facility | 2015 Credit Agreement | Subsequent Event | LIBOR | Minimum
Debt refinancing
Variable rate, basis spread (as a percent)	1.50%
Revolving Credit Facility | 2015 Credit Agreement | Subsequent Event | LIBOR | Maximum
Debt refinancing
Variable rate, basis spread (as a percent)	2.25%
Revolving Credit Facility | 2015 Credit Agreement | Subsequent Event | Adjusted Base Rate (ABR) | Minimum
Debt refinancing
Variable rate, basis spread (as a percent)	0.50%
Revolving Credit Facility | 2015 Credit Agreement | Subsequent Event | Adjusted Base Rate (ABR) | Maximum
Debt refinancing
Variable rate, basis spread (as a percent)	1.25%