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Debt (Schedule of Maturies of Long Term Debt) (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2012
Debt Disclosure [Abstract]  
2013 $ 13,263
2014 55,271
2015 436,418
2016 309,334
2017 24,672
Thereafter 149,773
Long Term Debt Maturities Repayments of Principal Total $ 988,731