Annual report pursuant to Section 13 and 15(d)

Income Taxes (Details)

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Income Taxes (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Components of income before income taxes      
Domestic $ 204,382 $ 227,560 $ 228,461
Foreign 11,988 18,695 5,269
Income before income taxes $ 216,370 $ 246,255 $ 233,730