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Commitments And Contingencies (Future Minimum Lease Payments Due Under Non-Cancelable Portions Of Leases) (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2011
Commitments And Contingencies [Abstract]  
2012 $ 488,057
2013 426,975
2014 355,366
2015 282,308
2016 208,535
Thereafter 565,820
Total before sublease income 2,327,061
Less sublease income 54,270
Total $ 2,272,791