Annual report pursuant to Section 13 and 15(d)

Income Taxes (Narrative) (Details)

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Income Taxes (Narrative) (Details) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Income Taxes [Line Items]      
Federal and state net operating losses acquired in business combinations $ 3,012    
Valuation allowance additions in the tax provision 2,093 1,671  
Valuation allowance reductions 2,289 528  
Reserve balance 7,870 13,552 3,036
Potential benefits included in reserve that would impact effective tax rate 4,095    
Liabilities included in the reserve 3,775    
Tax benefit recognized due to decrease in accrued interest 170    
Interest expense   451  
Interest accrued, net of federal benefit $ 933 $ 1,157 $ 707
Minimum [Member]
      
Income Taxes [Line Items]      
Federal Net Operating Losses Expire Period 2013    
State Net Operating Losses Expire Period 2013    
Maximum [Member]
      
Income Taxes [Line Items]      
Federal Net Operating Losses Expire Period 2032    
State Net Operating Losses Expire Period 2033