Deposits Interest Expense on Deposits (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Mar. 31, 2013
Deposits [Abstract]
Interest-bearing checking	$ 45	$ 40	$ 42
Savings and clubs	255	256	259
Money market savings	692	536	739
Certificates of deposit	1,836	1,938	2,441
Mortgagors deposits	30	34	37
Interest Expense, NOW Accounts, Money Market Accounts, and Savings Deposits	2,858	2,804	3,518
Penalty for early withdrawal of certificates of deposit	(5)	(7)	(10)
Total interest expense	$ 2,853	$ 2,797	$ 3,508