Quarterly report pursuant to sections 13 or 15(d)

Income Taxes (Details)

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Income Taxes (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 30, 2012
Sep. 30, 2011
Sep. 30, 2012
Sep. 30, 2011
Income Taxes (Textual) [Abstract]        
Income tax benefit $ 219 $ 6,530 $ 774 $ 22,661
Period at which cumulative loss incurred     3 years