Subsequent Events (Details) (Subsequent events, Term Loan Facility, USD $)	0 Months Ended
	Jul. 30, 2013
Subsequent events | Term Loan Facility
Subsequent events
Amount of term loan	$ 175,000,000
Uncommitted accordion option base amount	20,000,000
Uncommitted accordion option multiplier of 1st lien net leverage	4.0
Reference rate basis	LIBOR
Interest rate margin (as a percent)	5.00%
Interest rate floor (as a percent)	1.25%
Original issue discount (as a percent)	1.00%
Net cash proceeds after repayment of all outstanding debt obligations and payment of fees and expenses	$ 85,000,000