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Income Taxes (Narrative) (Details) (USD $)
 12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Income Taxes [Line Items]    
U.S. federal tax statutory rate 35.00% 35.00%
Estimated deferred tax expense   $ 35,600,000
Net operating loss 15,900,000  
Net operating loss expiration year Its statute of limitation for the year ended December 31, 2011 will expire in 2015  
Unrecognized tax benefits 0  
Deferred tax asset related to net operating loss carryforwards 13,110,000 43,455,000
Unrealized excess tax benefits from stock based compensation 300,000  
Unrealized excess tax benefits of stock based compensation 800,000  
Earliest open year for audit by the IRS of any state jurisdiction 2010  
Net current deferred tax asset (liability) 3,200,000 2,500,000
Domestic Country [Member]
    
Income Taxes [Line Items]    
Net operating loss 35,900,000  
Net operating loss expiration year expire in 2030 and 2031  
State and Local Jurisdiction [Member]
    
Income Taxes [Line Items]    
Net operating loss $ 23,900,000  
Net operating loss expiration year expire between 2017 and 2031