Annual report pursuant to Section 13 and 15(d)

Stock-Based Compensation Expense (Details)

v3.21.1
Stock-Based Compensation Expense (Details) - USD ($)
$ / shares in Units, $ in Thousands
12 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Mar. 31, 2019
Apr. 01, 2018
Jul. 28, 2010
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Intrinsic value of stock options exercised $ 646 $ 3,240 $ 555    
Share price (in dollars per share) $ 19.49        
Target number of shares (in shares) 49,716 86,634      
Stock compensation that remained to be expensed $ 1,461        
Stock based compensation, recognition period 1 year 6 months        
Restricted Stock and Stock Option Plan          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Maximum number of shares of the company's common stock that may be awarded         2,767,171
2011 Long-term Incentive Plan          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Maximum number of shares of the company's common stock that may be awarded       2,893,341  
2020 Long-Term Incentive Plan          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Maximum number of shares of the company's common stock that may be awarded 1,400,000        
Stock Options          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Vesting period (in years) 3 years        
Annual vesting percentage 100.00%        
Stock compensation expense $ 3,728 $ 4,960 $ 4,148    
Vested shares 52,098 26,608      
Fair value of vested shares $ 712,000 $ 660,000      
Restricted Stock Units (RSUs)          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Stock compensation expense $ 2,994        
Aggregate intrinsic value of unvested RSU's $ 5,935        
Amortization Period For The Fair Value Share Based Compsensation Award (in years) 1 year 9 months 18 days        
Performance Shares          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Vested shares 4,476 79,144 36,611    
Amortization Period For The Fair Value Share Based Compsensation Award (in years) 3 years        
Forfeited in period (shares) 130,835 5,153      
Performance Shares | Executive Officers          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Fair value of vested shares $ 1,947,000 $ 2,285,000 $ 1,654,000    
Performance Shares | Minimum          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Percentage of target shares 0.00%        
Performance Shares | Maximum          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Percentage of target shares 200.00%