Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensation - Additional Information (Detail)

v2.4.0.8
Stock-Based Compensation - Additional Information (Detail) (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Jun. 30, 2014
Jun. 30, 2013
Restricted Stock [Member]
   
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Stock based compensation expense $ 106 $ 180
Income tax benefit to stock based compensation 37 63
Employee Stock Purchase Plan [Member]
   
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Stock based compensation expense 17 15
Income tax benefit to stock based compensation $ 6 $ 5
Discounted purchase price of common stock percentage on fair market value 85.00% 85.00%
Shares approved for purchase under ESPP 200  
Amended And Restated 2000 Incentive Plan [Member] | Employee Stock Option [Member]
   
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Stock options maximum term 10 years  
Stock option awards granted 0 0
Amended And Restated 2000 Incentive Plan [Member] | Employee Stock Option [Member] | Maximum [Member]
   
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Number of shares authorized 1,375  
Amended And Restated 2000 Incentive Plan [Member] | Restricted Stock [Member]
   
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Restricted stock awards 28 32
Amended And Restated 2000 Incentive Plan [Member] | Restricted Stock [Member] | Performance Vested Restricted Stock [Member] | Officer [Member]
   
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Restricted stock awards 12 14
Share-based compensation vesting percentage 100.00% 100.00%
Amended And Restated 2000 Incentive Plan [Member] | Restricted Stock [Member] | Time Vested Restricted Stock [Member] | Officers and Key Employees [Member]
   
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Restricted stock awards 11 12
Share-based compensation vesting percentage 33.33% 33.33%
Vesting period 3 years 3 years
Amended And Restated 2000 Incentive Plan [Member] | Restricted Stock [Member] | Time Vested Restricted Stock [Member] | Director [Member]
   
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Restricted stock awards 5 6
Share-based compensation vesting percentage 100.00% 100.00%
Vesting period 1 year 1 year
Amended And Restated 2000 Incentive Plan [Member] | Restricted Stock [Member] | Maximum [Member]
   
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Number of shares authorized 250