Debt - Schedule of Debt Components (Details) (USD $)	Dec. 31, 2013	Dec. 31, 2012	Oct. 08, 2010
Debt Instrument [Line Items]
Debt Instrument, Unamortized Discount	$ 19,800,000	$ 23,300,000	$ 29,600,000
Long-term Debt	1,208,200,000	1,209,500,000
Current maturities of long-term debt	4,720,000	7,420,000
Long-term debt, less current maturities	1,203,517,000	1,202,063,000
Senior Secured Credit Facility, due Oct 2017, variable rate 4.25%
Debt Instrument [Line Items]
Senior Secured Credit Facility Due	467,200,000	472,000,000
Senior Notes, due Oct 2018, fixed rate 9.5%
Debt Instrument [Line Items]
Senior Notes	$ 760,800,000	$ 760,800,000