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Long-Term Debt (Debt Maturities By Year) (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2013
Long-Term Debt [Abstract]  
Principal Payments 2014 $ 257,916
Principal Payments 2015 259,840
Principal Payments 2016 345,466
Principal Payments 2017 607,375
Principal Payments 2018 $ 583,273