Share-based Payments, Restricted Stock Units (Details) - Restricted Stock [Member]	12 Months Ended
	Mar. 31, 2017 USD ($) Installment $ / shares shares	Mar. 31, 2016 USD ($) $ / shares shares
Number of Shares [Roll Forward]
Non-vested at beginning of period (in shares)	153,527
Granted (in shares)	62,367	49,702
Vested (in shares)	(89,617)
Forfeited (in shares)	0
Non-vested at end of period (in shares)	126,277	153,527
Weighted Average Grant Date Fair Value [Roll Forward]
Non-vested at beginning of period (in dollars per share) | $ / shares	$ 22.28
Granted (in dollars per share) | $ / shares	28.44
Vested (in dollars per share) | $ / shares	18.14
Forfeited (in dollars per share) | $ / shares	0
Non-vested at end of period (in dollars per share) | $ / shares	$ 28.26	$ 22.28
Estimated fair value of awards granted | $	$ 1,774,000	$ 1,566,000
Number of equal annual installments in which awards vest | Installment	3
Number of shares withheld (in shares)	36,586	29,003
Total unrecognized compensation expense, restricted stock | $	$ 2,333,000
Unrecognized compensation expense, period of recognition	1 year 7 months 6 days