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Long-Term Debt (Debt Maturity Schedule) (Details 1) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2012
Indebtedness repayment schedule  
2013 $ 36,966
2014 38,481
2015 39,113
2016 1,388,592
2017 34,965
Thereafter 1,607,737
Total indebtedness $ 3,145,854