Quarterly report pursuant to Section 13 or 15(d)

Stock- Based Compensation (Details Textual)

v2.4.0.6
Stock- Based Compensation (Details Textual) (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Jun. 30, 2012
Jun. 30, 2011
Stock Based Compensation (Textual) [Abstract]    
Number of shares authorized under stock incentive plan 1,375  
Number of shares authorized under other than stock option plan 250  
Stock option awards granted 49 9
Stock options vesting period 3 years  
Stock options maximum vesting period 10 years  
Percentage of stock options vesting per year 33.33%  
Restricted Stock Awards 26 27
Percentage of performance shares, vest third anniversary of grant date 100.00%  
Percentage of time vested shares vested on second and fourth anniversary of grant date 50.00%  
Percentage of time vested shares, vest on first anniversary of grant date 100.00%  
Stock Compensation Plan [Member]
   
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Income tax benefit to stock based compensation 55 42
Stock based compensation expense 156 116
Employee Stock Purchase Plan [Member]
   
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Income tax benefit to stock based compensation 5 6
Discounted purchase price of common stock percentage on fair market value 85.00%  
Share purchased under ESPP 200  
Stock based compensation expense under ESPP 15 18