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Share-based Payments, Restricted Stock Units (Details) - Restricted Stock [Member]
 12 Months Ended
Mar. 31, 2020
USD ($)
Installment
$ / shares
shares
Mar. 31, 2019
USD ($)
$ / shares
shares
Number of Shares [Roll Forward]    
Non-vested at beginning of period (in shares) 243,134  
Granted (in shares) 113,483 179,725
Vested (in shares) (151,182)  
Forfeited (in shares) (3,452)  
Non-vested at end of period (in shares) 201,983 243,134
Weighted Average Grant Date Fair Value [Roll Forward]    
Non-vested at beginning of period (in dollars per share) | $ / shares $ 21.75  
Granted (in dollars per share) | $ / shares 18.61  
Vested (in dollars per share) | $ / shares 21.66  
Forfeited (in dollars per share) | $ / shares 21.10  
Non-vested at end of period (in dollars per share) | $ / shares $ 20.06 $ 21.75
Estimated fair value of awards granted | $ $ 2,112,000 $ 3,490,000
Number of equal annual installments in which awards vest | Installment 3  
Number of shares withheld (in shares) 58,802 14,959
Total unrecognized compensation expense, restricted stock | $ $ 2,643,000  
Weighted average vesting period over which compensation expense is expected to be recognized 1 year 10 months 24 days