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Income Taxes (Details) (USD $)
 3 Months Ended 12 Months Ended
Mar. 31, 2013
Mar. 31, 2012
Dec. 31, 2012
Income Taxes (Textual) [Abstract]      
Deferred tax benefits including income tax expense $ 4,400,000    
Valuation allowance 68,300,000    
Net deferred tax assets 68,900,000    
Income tax benefit, including discrete items 83,000 (184,000)  
Uncertain income tax (less than) Less than a 50% likelihood    
Total liability for unrecognized tax benefits included other long-term liabilities 198,000   367,000
Interest expense related to uncertain tax positions 169,000    
Expected unrecognized tax benefits due to expiration of limitations applicable to the 2008 taxable year $ 71,000