Quarterly report pursuant to Section 13 or 15(d)

Capital Transactions (Details 3)

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Capital Transactions (Details 3) (USD $)
In Thousands, except Per Share data, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 30, 2014
Sep. 30, 2013
Sep. 30, 2014
Sep. 30, 2013
Dec. 31, 2013
Stock options
         
Share Based Compensation          
Outstanding options to purchase (in shares) 2,122   2,122   1,926
Exercisable (in shares) 1,095   1,095   838
Expected to vest (in shares) 849   849   905
Aggregate Intrinsic value, outstanding $ 7,546   $ 7,546   $ 9,415
Aggregate Intrinsic value, exercisable 5,656   5,656   6,069
Aggregate Intrinsic value, expected to vest 1,795   1,795   3,179
RSUs
         
Share-based compensation, additional disclosures          
Share-based compensation expense 261 49 727 176  
Related tax benefits 103 19 287 70  
Unrecognized share-based compensation expense $ 1,117   $ 1,117   $ 62
Weighted-average period over which the remaining compensation expense is expected to be recognized     2 years    
2012 Stock Incentive Plan | RSUs
         
Number of Shares          
Units outstanding at the beginning of the period (in shares)     32    
Granted (in shares)     156    
Units outstanding at the end of the period (in shares) 181   181    
Issued (in shares)     0    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period     7    
Weighted Average Grant Date Fair Value          
Units outstanding at the beginning of the period (in dollars per share)     $ 12.47    
Granted (in dollars per share)     $ 10.65    
Units outstanding at the end of the period (in dollars per share) $ 12.16   $ 12.16    
Issued (in dollars per share)     $ 0.00    
Forfeited (in dollars per share)     $ 15.38    
Share-based compensation, additional disclosures          
Vesting period     4 years    
Discount for lack of marketability ( as a percent)     17.50%