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Share-based Payments - Stock Options Activity (Details) - Stock Options [Member] - USD ($)
 6 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Number of Shares [Roll Forward]    
Outstanding at beginning of period (in shares) 1,744,885  
Granted (in shares) 0 345,423
Exercised (in shares) (29,130)  
Forfeited (in shares) (2,592)  
Outstanding at end of period (in shares) 1,713,163  
Weighted Average Exercise Price [Roll Forward]    
Outstanding at beginning of period (in dollars per share) $ 17.51  
Granted (in dollars per share) 0  
Exercised (in dollars per share) 16.01  
Forfeited (in dollars per share) 19.46  
Outstanding at end of period (in dollars per share) $ 17.53  
Number of stock options unvested (in shares) 320,104  
Weighted average exercise price of stock options unvested (in dollars per share) $ 16.53  
Total unrecognized compensation expense $ 1,832,000  
Weighted average remaining vesting period over which compensation expense is expected to be recognized 1 year 4 months 24 days