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 6 Months Ended
Jun. 30, 2012
Jun. 30, 2011
Jun. 30, 2012
Jun. 30, 2011
Income Taxes (Textual) [Abstract]        
Effective Tax rate 68.20% 41.00% 58.60% 51.90%
Income tax expense $ (2,887) $ (20,846) $ (6,732) $ (19,313)