Long-term Obligations - Term Loan (Details) (USD $)	0 Months Ended
	Jul. 09, 2014	Jul. 09, 2014
Senior Secured Term Loan
Debt Instrument [Line Items]
Face amount of term loan		$ 300,000,000
Interest rate (percent)		7.20%
Contingent interest rate (percent)	6.20%
Amount of principal repayment on quarterly installment payments through July 2016	15,000,000
Amount of principal repayment on quarterly installment payments from October 2016	60,000,000
Debt Instrument, Unamortized Discount		5,300,000
Senior Secured Term Loan Facility
Debt Instrument [Line Items]
Maximum borrowing capacity	$ 200,000,000	$ 200,000,000
Minimum | Senior Secured Term Loan | LIBOR
Debt Instrument [Line Items]
Basis spread on variable rate (percent)	5.00%
Maximum | Senior Secured Term Loan | LIBOR
Debt Instrument [Line Items]
Basis spread on variable rate (percent)	7.50%