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Stock Option Plans Nonvested Share Activity (Details) (USD $)
12 Months Ended
Sep. 30, 2012
Dec. 31, 2011
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]    
Outstanding, beginning of period   1,008,858
Granted 3,000  
Vested (310,591)  
Forfeited (86,995)  
Outstanding, end of period 614,272 1,008,858
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Roll Forward]    
Outstanding, weighted average grant date fair value, beginning of period $ 3.20 $ 3.02
Granted, weighted average grant date fair value $ 3.53  
Vested, weighted average grant date fair value $ 2.59  
Forfeited, weighted average grant date fair value $ 3.28  
Outstanding, weighted average grant date fair value, end of period $ 3.20 $ 3.02