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Leases (Schedule Of Future Minimum Operating And Capital Lease Payments) (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2011
Leases [Line Items]  
Total future minimum lease payments due in 2012 $ 148,367
Total future minimum lease payments due in 2013 120,663
Total future minimum lease payments due in 2014 92,573
Total future minimum lease payments due in 2015 75,537
Total future minimum lease payments due in 2016 51,483
Total future minimum lease payments due thereafter 207,067
Total minimum payments 695,690
Real Property [Member]
 
Leases [Line Items]  
Operating lease, future minimum lease payments due in 2012 37,545
Operating lease, future minimum lease payments due in 2013 30,787
Operating lease, future minimum lease payments due in 2014 25,755
Operating lease, future minimum lease payments due in 2015 21,987
Operating lease, future minimum lease payments due in 2016 19,210
Operating lease, future minimum lease payments due Thereafter 67,539
Operating lease, Total minimum payments 202,823
Real Property Master Leases [Member]
 
Leases [Line Items]  
Operating lease, future minimum lease payments due in 2012 19,252
Operating lease, future minimum lease payments due in 2013 17,581
Operating lease, future minimum lease payments due in 2014 13,731
Operating lease, future minimum lease payments due in 2015 13,219
Operating lease, future minimum lease payments due in 2016 11,251
Operating lease, future minimum lease payments due Thereafter 39,171
Operating lease, Total minimum payments 114,205
Equipment [Member]
 
Leases [Line Items]  
Operating lease, future minimum lease payments due in 2012 68,848
Operating lease, future minimum lease payments due in 2013 54,827
Operating lease, future minimum lease payments due in 2014 37,153
Operating lease, future minimum lease payments due in 2015 24,653
Operating lease, future minimum lease payments due in 2016 9,009
Operating lease, future minimum lease payments due Thereafter 4,940
Operating lease, Total minimum payments 199,430
Real Property And Equipment [Member]
 
Leases [Line Items]  
Capital lease, future minimum lease payments due in 2012 22,722
Capital lease, future minimum lease payments due in 2013 17,468
Capital lease, future minimum lease payments due in 2014 15,934
Capital lease, future minimum lease payments due in 2015 15,678
Capital lease, future minimum lease payments due in 2016 12,013
Capital lease, future minimum lease payments due Thereafter 95,417
Capital lease, Total minimum payments 179,232
Less amounts representing interest (74,820)
Present value of minimum lease payments $ 104,412