Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensation - Additional Information (Detail)

v3.7.0.1
Stock-Based Compensation - Additional Information (Detail) - USD ($)
$ in Thousands
3 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Stock Compensation Plan [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Stock based compensation (income) expense $ (67) $ 29
Income tax (expense) benefit to stock based compensation $ (23) $ 10
Employee Stock Option [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Stock options maximum term 10 years  
Amended and Restated 2000 Incentive Plan [Member] | Stock Compensation Plan [Member] | Maximum [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Number of shares authorized 1,375,000  
Amended and Restated 2000 Incentive Plan [Member] | Restricted Stock [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Restricted stock awarded 59,000 82,000
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 awarded 30,000 43,000
Share-based compensation vesting percentage 100.00%  
Vesting period 3 years  
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 awarded 22,000 31,000
Share-based compensation vesting percentage 33.33%  
Vesting period 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 awarded 7,000 8,000
Share-based compensation vesting percentage 100.00%  
Vesting period 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 467,000  
Amended and Restated 2000 Incentive Plan [Member] | Employee Stock Option [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Stock option awards granted 0 0
Employee Stock Purchase Plan [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Maximum discount on purchase price of common stock percentage on fair market value 15.00%  
Stock based compensation expense $ 0 $ 13
Income tax benefit to stock based compensation $ 0 $ 5
Common stock may be purchased 200