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Stock-based Compensation (Details) (USD $)
In Thousands, except Share data, unless otherwise specified
3 Months Ended 6 Months Ended
Mar. 31, 2012
Mar. 31, 2011
Jun. 30, 2012
Jun. 30, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Fair value assumptions, weighted average expected lives     7 years 6 months 7 years 6 months
Stock options granted     240,775  
Stock-based compensation     $ 423 $ 544
Reversal of stock-based compensation, actual forfeitures $ 230 $ 165    
Stock Options [Member]
       
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Fair value assumptions, risk free interest rate     1.70% 3.00%
Fair value assumptions, weighted average volatility rate     48.00% 46.00%
Stock options, expected forfeiture rate     8.97% 1.64%
Options granted in period, weighted average grant date fair value     $ 5.99 $ 6.43
Minimum [Member] | Stock Options [Member]
       
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Exercise price for stock options granted     $ 10.86  
Maximum [Member] | Stock Options [Member]
       
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Exercise price for stock options granted     $ 11.77