Long-Term Debt (Schedule of Early Redemption Prices on 7.125% Senior Notes) (Details) (Senior Notes at 7.125, Due 2020 [Member], Senior Notes [Member])	Mar. 31, 2013
Period from July 15, 2016 to July 14, 2017 [Member]
Debt Instrument [Line Items]
Future Redemption Price of Debt During Eligibility Period, as a Percentage of Principal Amount	103.563%
Period from July 15, 2017 to July 14, 2018 [Member]
Debt Instrument [Line Items]
Future Redemption Price of Debt During Eligibility Period, as a Percentage of Principal Amount	101.781%
Period from July 15, 2018 Thereafter [Member]
Debt Instrument [Line Items]
Future Redemption Price of Debt During Eligibility Period, as a Percentage of Principal Amount	100.00%