Annual report pursuant to Section 13 and 15(d)

Stock-Based Compensation - Narrative (Details)

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Stock-Based Compensation - Narrative (Details)
 12 Months Ended
Mar. 31, 2024
USD ($)
plan
$ / shares
shares
Mar. 31, 2023
USD ($)
shares
Mar. 31, 2022
USD ($)
shares
May 21, 2020
shares
Apr. 08, 2011
shares
Jul. 28, 2010
shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Number of plans | plan 3          
Intrinsic value of stock options exercised | $ $ 0 $ 0 $ 60,000      
Stock Options            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Stock compensation | $ $ 5,754,000 $ 5,954,000 $ 3,803,000      
Vesting period 3 years          
Annual vesting percentage 100.00%          
Award expiration period 10 years          
Share price (in dollars per share) | $ / shares $ 32.72          
Vested (in shares) 22,829 38,137 32,136      
Fair value of vested awards | $ $ 695,000 $ 624,000 $ 570,000      
Restricted Stock Units (RSUs)            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Share price (in dollars per share) | $ / shares $ 32.72          
Vested (in shares) 176,813 112,157 125,089      
Awards outstanding (in shares) 0          
Aggregate intrinsic value of unvested RSU's | $ $ 9,539,000          
Nonvested award, unrecognized expense | $ $ 3,741,000          
Nonvested award, weighted average recognition period 1 year          
Forfeited in period (shares) 3,590 13,584 24,524      
Performance Shares            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Vested (in shares) 141,608 182,423 91,164      
Nonvested award, unrecognized expense | $ $ 2,368,000          
Nonvested award, weighted average recognition period 1 year          
Amortization period for the fair value share based compensation award (in years) 3 years          
Target number of shares (in shares) 54,655 45,525        
Adjusted EBITDA-based performance awards paid percentage 82.00% 200.00%        
Stock price-related awards paid percentage 200.00% 106.00%        
Vesting rights, percentage 160.00%          
Forfeited in period (shares)     59,297      
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%          
Performance Shares | Executive Officers            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Fair value of vested awards | $ $ 2,277,000 $ 2,547,000 $ 1,689,000      
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 (in shares)           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 (in shares)         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 (in shares)       1,400,000