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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, 2014
Mar. 31, 2013
Jun. 30, 2014
Jun. 30, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Stock-based compensation     $ 313 $ 499
Reversal of stock-based compensation, actual forfeitures $ 238 $ 135    
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage     25.00% 25.00%
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period     1 year 1 year
Stock Options [Member]
       
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Fair value assumptions, risk free interest rate     2.00% 1.40%
Fair value assumptions, weighted average volatility rate     34.00% 41.00%
Stock options, expected forfeiture rate     10.30% 11.16%
Fair value assumptions, weighted average expected lives     7 years 2 months 12 days 7 years 6 months
Options granted in period, weighted average grant date fair value     $ 7.72 $ 7.54
Stock options granted     116,990  
Minimum [Member] | Stock Options [Member]
       
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Exercise price for stock options granted     $ 19.55  
Maximum [Member] | Stock Options [Member]
       
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Exercise price for stock options granted     $ 21.57