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Income Taxes Income Taxes (Narrative) (Details) (USD $)
 1 Months Ended 12 Months Ended
Jul. 31, 2013
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Operating Loss Carryforwards [Line Items]          
Additional Tax Benefit Due to Change in Accounting Method $ 57,200,000        
Deferred Tax Liabilities, Net   11,915,000 0    
Change in valuation allowance   151,000      
Unrecognized tax benefits   7,832,000 7,747,000 7,617,000 7,396,000
Income tax penalty an interest   500,000      
State
          
Operating Loss Carryforwards [Line Items]          
Operating loss carryforwards   68,800,000      
Income Tax Reconciliation, Deductions   21,700,000      
Federal
          
Operating Loss Carryforwards [Line Items]          
Operating loss carryforwards   10,600,000      
Income Tax Reconciliation, Deductions   $ 23,000,000