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Long-Term Debt (Debt Maturities By Year) (Details) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2014
Long-Term Debt [Abstract]  
Principal Payments 2014 (remaining nine months) $ 245,445
Principal Payments 2015 262,517
Principal Payments 2016 348,143
Principal Payments 2017 610,052
Principal Payments 2018 583,942
Principal Payments 2019 $ 434,565