Long-Term Debt (Issuance of Debt Instrument) (Details) (USD $)	12 Months Ended			3 Months Ended	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2013 2018 Notes	Dec. 31, 2013 2022 Notes	Mar. 31, 2013 2018 Notes [Member]	Dec. 31, 2013 Moody's, B1 Rating [Member]	Dec. 31, 2013 Standard & Poor's, B+ Rating [Member]
Debt Instrument [Line Items]
Debt Instrument, Credit Rating					B1	B+
Debt Instrument, Issuance Date		Feb. 10, 2010	May 24, 2012
Debt Instrument, Face Amount		$ 725,000,000	$ 250,000,000
Debt Instrument, Interest Rate, Stated Percentage		8.875%	7.125%
Debt Instrument, Call Date, Earliest		Feb. 15, 2014	Jun. 01, 2017
Debt Instrument Call Date Mid		Feb. 15, 2015	Jun. 01, 2018
Debt Instrument Call Date 1 Mid			Jun. 01, 2019
Debt Instrument, Call Date, Latest		Feb. 15, 2016	Jun. 01, 2020
Debt Instrument, Maturity Date		Feb. 15, 2018	Jun. 01, 2022
Selling Priceof Debt Instrument		97.907%	100.00%
Debt Instrument, Interest Rate, Effective Percentage		9.25%	7.125%
Redemption Price For Early Redepemption			107.125%
Redemption Amount			35.00%
Redemption Price 1			103.563%
Redemption Price 2			102.375%
Redemption Price 3			101.188%
Redemption Price 4			100.00%
Redemption Price 2018 Note 1		104.438%
Principal Outstanding After Early Redemption			65.00%
Redemption Days			180
Fixed Charge Coverage ratio	2.0 to 1.0
Redemption Price 2018 Note 2		102.219%
Redemption Price 2018 Note 3		100.00%
Debt Instrument, Redemption Price, Percentage of Principal Amount Redeemed				101.00%