Annual report pursuant to Section 13 and 15(d)

Income Taxes NOL (Details)

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Income Taxes NOL (Details) (USD $)
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Sep. 30, 2010
Federal [Member]
Operating Loss Carryforwards [Line Items]      
Deferred Tax Assets, Valuation Allowance $ 569,402,000 [1] $ 436,639,000 [1]  
Existing NOL subject to annual NOL utilization limitation     1,500,000,000
Adjustments to Additional Paid in Capital, Income Tax Benefit from Share-based Compensation $ 22,500,000    
[1]