Summary of Financing Arrangements for Leveraged ESOP Debt (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Mar. 31, 2013
Issued June, 1991 [Member]
Debt Disclosure [Abstract]
Employee stock ownership plan (ESOP), debt structure, indirect loan, amount	$ 240
Employee stock ownership plan (ESOP), interest payments	48	53	250
Issued March, 1999 [Member]
Debt Disclosure [Abstract]
Employee stock ownership plan (ESOP), debt structure, indirect loan, amount
Employee stock ownership plan (ESOP), interest payments
Issued February, 2000 [Member]
Debt Disclosure [Abstract]
Employee stock ownership plan (ESOP), debt structure, indirect loan, amount
Employee stock ownership plan (ESOP), interest payments
Issued April, 2001 [Member]
Debt Disclosure [Abstract]
Employee stock ownership plan (ESOP), debt structure, indirect loan, amount
Employee stock ownership plan (ESOP), interest payments
Issued July, 2009 [Member]
Debt Disclosure [Abstract]
Employee stock ownership plan (ESOP), debt structure, indirect loan, amount	866
Employee stock ownership plan (ESOP), interest payments	$ 31	$ 17	$ 35