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Income Taxes - Narrative (Details) (USD $)
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Income Tax Disclosure [Abstract]      
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate 35.00%    
Provision for valuation allowance on deferred tax assets $ 15,764,000 $ 0 $ 0
Income Tax Examination, Penalties and Interest Expense 2,000,000 (100,000) 1,300,000
Income Tax Examination, Penalties and Interest Accrued 3,600,000 1,600,000  
Unrecognized Tax Benefits that Would Impact Effective Tax Rate 23,700,000 21,100,000  
Operating Loss Carryforwards 100,400,000    
Deferred Tax Assets, Capital Loss Carryforwards 843,000 665,000  
Operating Loss Carryforwards, Valuation Allowance 44,400,000    
Economic Development Commission Benefit, Term 30 years    
Economic Development Commission Benefit, Tax Impact $ 109,100,000 $ 25,600,000  
Economic Development Commission Benefit, Tax Impact On Diluted Earnings Per Share $ 0.78 $ 0.19