Annual report pursuant to Section 13 and 15(d)

Income Taxes (Consolidated Income From Continuing Operations Before Income Taxes) (Details)

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Income Taxes (Consolidated Income From Continuing Operations Before Income Taxes) (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Income Taxes [Line Items]      
Income before income tax $ 137,680 $ 104,891 $ 89,850
U.S. Operations [Member]
     
Income Taxes [Line Items]      
Income before income tax 68,412 59,881 59,629
Foreign Operations [Member]
     
Income Taxes [Line Items]      
Income before income tax $ 69,268 $ 45,010 $ 30,221