Annual report pursuant to Section 13 and 15(d)

Stock-Based Compensation Expense (Details)

v3.19.2
Stock-Based Compensation Expense (Details) - USD ($)
$ / shares in Units, $ in Thousands
12 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Mar. 31, 2017
Mar. 31, 2016
Jul. 28, 2010
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]          
Exercised (in shares)     (111,611)    
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)     $ 22.74    
Stock compensation expense $ 4,148 $ 3,519 $ 3,402    
Total fair value of options issued   411      
Target number of shares (in shares) 11,533        
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 $ 555 $ 648 $ 627    
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) 367,571.000 411,939 433,726    
Exercised (in shares) (37,906) (42,956) (47,484)    
Forfeited (in shares) (279) (1,412) (2,802)    
Options outstanding, end of period (in shares) 329,386.000 367,571.000 411,939    
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) $ 8.96 $ 9.12 $ 8.94 $ 8.07  
Granted, weighted average exercise price (in dollars per share)     19.64    
Exercised, weighted average exercise price (in dollars per share) 10.44 7.00 6.77    
Forfeited, weighted average exercise price (in dollars per share) 21.52 $ 19.83 $ 19.58    
Granted (in shares)     28,499    
Closing price (in dollars per share) $ 24.51        
Total unrecognized expense related to non-vested stock option awards $ 51        
Stock based compensation, recognition period 9 months 5 days        
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 $ 454        
Performance Shares          
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]          
Vested shares 36,611,000 0 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 $ 1,622        
Stock based compensation, recognition period 1 year 9 months 5 days        
Total fair value of options issued $ 1,654 $ 1,420 $ 881    
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 14,660 0 50,799    
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) 46,032        
Common Stock          
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]          
Exercised (in shares) (37,906) (42,636) (43,121)