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           Income Taxes NOL (Details) (USD $) 
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        12 Months Ended | ||||||
|---|---|---|---|---|---|---|---|
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           Dec. 31, 2012 
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           Dec. 31, 2011 
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           Sep. 30, 2010
 
          Federal [Member] 
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| 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 | ||||||
          
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- Definition 
          Operating Loss Carryforwards, Subject to Annual Utilization Limitation No definition available. 
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- Definition 
          Tax benefit associated with any equity-based compensation plan other than an employee stock ownership plan (ESOP). The tax benefit results from the deduction by the entity on its tax return for an award of stock that exceeds the cumulative compensation cost for common stock or preferred stock recognized for financial reporting. Includes any resulting tax benefit that exceeds the previously recognized deferred tax asset (excess tax benefits). Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition 
          Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Details 
          
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