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Share-based Payments - Restricted Stock Units (Details) - Restricted Stock [Member] - USD ($)
9 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Number of Shares [Roll Forward]    
Non-vested at beginning of period (in shares) 243,134  
Granted (in shares) 113,483 104,725
Vested (in shares) (150,032)  
Forfeited (in shares) (1,701)  
Non-vested at end of period (in shares) 204,884  
Weighted Average Grant Date Fair Value [Roll Forward]    
Non-vested at beginning of period (in dollars per share) $ 21.75  
Granted (in dollars per share) 18.61  
Vested (in dollars per share) 21.61  
Forfeited (in dollars per share) 21.53  
Non-vested at end of period (in dollars per share) $ 20.12  
Estimated fair value of awards granted $ 2,112,000 $ 2,075,000
Total unrecognized compensation expense $ 3,170,000  
Weighted average vesting period over which compensation expense is expected to be recognized 2 years