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Income Taxes Income Taxes (Table 2) (Details) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Current: [Abstract]      
Current Federal Tax Expense (Benefit) $ 41,280 $ 43,953 $ 36,482
Current State and Local Tax Expense (Benefit) 10,319 8,560 8,253
Current Foreign Tax Expense (Benefit) 11,035 6,814 6,195
Current Income Tax Expense (Benefit) 62,634 59,327 50,930
Deferred: [Abstract]      
Deferred Federal Income Tax Expense (Benefit) 2,272 1,588 (651)
Deferred State and Local Income Tax Expense (Benefit) (396) 676 (147)
Deferred Foreign Income Tax Expense (Benefit) 113 0 0
Deferred Income Tax Expense (Benefit) 1,989 2,264 (798)
Provision for income taxes $ 64,623 $ 61,591 $ 50,132