Annual report pursuant to Section 13 and 15(d)

Stock-Based Compensation Expense (Details)

v3.20.1
Stock-Based Compensation Expense (Details) - USD ($)
$ / shares in Units, $ in Thousands
12 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Mar. 31, 2018
Mar. 31, 2017
Jul. 28, 2010
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Roll Forward]          
Exercised, weighted average exercise price (in dollars per share)     $ 21.51    
Stock compensation expense $ 4,960 $ 4,148 $ 3,519    
Total fair value of options issued   454      
Target number of shares (in shares) 30,075        
Restricted Stock and Stock Option Plan [Member]          
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 [Member]          
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
Stock Options          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Intrinsic value of stock options exercised $ 3,240 $ 555 $ 648    
Vesting period (in years) 5 years        
Annual vesting percentage 20.00%        
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]          
Options outstanding, beginning of period (in shares) 329,386 367,571 411,939    
Exercised (in shares) (26,730)        
Forfeited (in shares) (4,109) (279) (1,412)    
Options outstanding, end of period (in shares) 139,485 329,386 367,571    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Roll Forward]          
Options outstanding, weighted average exercise price (in dollars per share) $ 12.30 $ 8.96 $ 9.12 $ 8.94  
Exercised, weighted average exercise price (in dollars per share) 6.24 10.44 7.00    
Forfeited, weighted average exercise price (in dollars per share) 21.40 $ 21.52 $ 19.83    
Closing price (in dollars per share) $ 15.07        
Stock Options | Maximum          
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Roll Forward]          
Expiration term 10 years        
Common Stock          
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Roll Forward]          
Total fair value of options issued $ 660        
Performance Shares          
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]          
Vested shares 79,144,000 36,611,000 0    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Roll Forward]          
Total unrecognized expense related to non-vested stock option awards $ 2,101        
Stock based compensation, recognition period 2 years 29 days        
Total fair value of options issued $ 2,285 $ 1,654 $ 1,420    
Amortization Period For The Fair Value Share Based Compsensation Award (in years) 3 years        
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period 5,153 0 14,660    
Adjusted EBITDA Awards [Member]          
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Roll Forward]          
Target number of shares (in shares) 62,319