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Taxes On Income (Components Of Income Tax Expense) (Details) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Operating Loss Carryforwards [Line Items]      
Current $ 150,800 $ 123,241 $ 99,661
Deferred (11,552) (11,674) (11,386)
Income Tax Expense (Benefit), Total 139,248 111,567 88,275
Domestic 134,242 110,318 85,626
Foreign 5,006 1,249 2,649
Domestic and foreign tax expense total 139,248 111,567 88,275
State taxes, Current 138,686 112,475 88,398
State taxes, Deferred (4,444) (2,157) (2,772)
State tax expense (Benefit) 134,242 110,318 85,626
Total Foreign Taxes 5,006 1,249 2,649
Taxes on income 139,248 111,567 88,275
Foreign Country [Member]
      
Operating Loss Carryforwards [Line Items]      
Federal taxes, Current 7,809 6,608 7,166
Federal taxes, Deferred 748 (792) 1,281
Federal Income Tax Expense (Benefit) 8,557 5,816 8,447
State taxes, Current 1,061 1,243 977
State taxes, Deferred 819 (52) 423
State tax expense (Benefit) 1,880 1,191 1,400
Other international locations, Current 3,245 2,915 3,120
Other international locations, Deferred (8,676) (8,673) (10,318)
Other international locations tax expense total $ (5,431) $ (5,758) $ (7,198)