Quarterly report pursuant to Section 13 or 15(d)

Income Taxes (Details)

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Income Taxes (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Mar. 31, 2012
Mar. 31, 2011
Income Taxes [Abstract]    
Income tax expense $ 1,981 $ 10,182
Effective tax rate 38.10% 35.30%
Federal statutory income tax rate 35.00%