Employee Benefit Plans (Summary of Financing Arrangements for Leveraged ESOP Debt) (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2015
Issued June, 1991 [Member]
Debt Disclosure [Abstract]
Employee stock ownership plan (ESOP), debt structure, indirect loan, amount	$ 31
Employee stock ownership plan (ESOP), interest payments	2	$ 10	$ 48
Issued July, 2009 [Member]
Debt Disclosure [Abstract]
Employee stock ownership plan (ESOP), debt structure, indirect loan, amount	775
Employee stock ownership plan (ESOP), interest payments	36	33	31
Issued February, 2016 [Member]
Debt Disclosure [Abstract]
Employee stock ownership plan (ESOP), debt structure, indirect loan, amount	5,245
Employee stock ownership plan (ESOP), interest payments