Annual report pursuant to Section 13 and 15(d)

Stock-Based Compensation Expense (Details)

v3.23.1
Stock-Based Compensation Expense (Details) - USD ($)
$ / shares in Units, $ in Thousands
 12 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Mar. 31, 2021
Apr. 01, 2018
Jul. 28, 2010
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Intrinsic value of stock options exercised $ 0 $ 60 $ 646    
Share price (in dollars per share) $ 24.92        
Target number of shares (in shares) 62,530 72,949      
Stock compensation that remained to be expensed $ 5,648        
Stock based compensation, recognition period 1 year        
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]          
Stock compensation expense $ 5,954 $ 3,803 $ 3,728    
Vesting period (in years) 3 years        
Annual vesting percentage 100.00%        
Vested shares 38,137 32,136 52,098    
Fair value of vested shares $ 624,000 $ 570,000 $ 712,000    
Restricted Stock Units (RSUs)          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Stock compensation expense $ 3,272        
Aggregate intrinsic value of unvested RSU's $ 8,373        
Amortization period for the fair value share based compsensation award (in years) 1 year        
Performance Shares          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Vested shares 182,423 91,164 4,476    
Amortization period for the fair value share based compsensation award (in years) 3 years        
Forfeited in period (shares)   67,220 130,835    
Performance Shares | Executive Officers          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Fair value of vested shares $ 2,547,000 $ 1,689,000 $ 1,947,000    
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%