Investment Securities Investment Securities Carrying Value (Amortized Cost) and Fair Value by remaining period of contractual maturity (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014		Sep. 30, 2014	Mar. 31, 2014
INVESTMENT SECURITIES [Abstract]
Available-for-sale Securities, Debt Maturities, Next Twelve Months, Amortized Cost Basis	$ 5,533
Available-for-sale Securities, Debt Maturities, Next Twelve Months, Fair Value	5,533
Available-for-sale, Securities, Debt Maturities, within One Year, Weighted Average Rate	0.25%
Available-for-sale Securities, Debt Maturities, Year Two Through Five, Amortized Cost Basis	16,480
Available-for-sale Securities, Debt Maturities, Year Two Through Five, Fair Value	16,404
Available-for-sale Securities, Debt Maturities, after One Through Five Years, Weighted Average Rate	1.34%
Available-for-sale Securities, Debt Maturities, Year Six Through Ten, Amortized Cost Basis	24,349
Available-for-sale Securities, Debt Maturities, Year Six Through Ten, Fair Value	23,616
Available-for-sale Securities, Debt Maturities, after Five Through Ten Years, Weighted Average Rate	1.83%
Available-for-sale Securities, Debt Maturities, after Ten Years, Amortized Cost Basis	56,048
Available-for-sale Securities, Debt Maturities, after Ten Years, Fair Value	54,895
Available-for-sale Securities, Debt Maturities, after Ten Years, Weighted Average Rate	1.74%
Available-for-sale Securities, Debt Maturities, Amortized Cost Basis	102,410
Available-for-sale	100,448			89,461
Available-for-sale Securities, Debt Maturities, Weighted Average Rate	1.61%
Held-to-maturity Securities, Debt Maturities, after Five Through Ten Years, Net Carrying Amount	5,007
Held-to-maturity Securities, Debt Maturities, Year Six Through Ten, Fair Value	4,971
Held-to-maturity Securities, Debt Maturities, after Five Through Ten Years, Weighted Average Rate	2.38%
Held-to-maturity Securities, Debt Maturities, after Ten Years, Net Carrying Amount	7,246
Held-to-maturity Securities, Debt Maturities, after Ten Years, Fair Value	7,462
Held-to-maturity Securities, Debt Maturities, after Ten Years, Weighted Average Rate	2.89%
Held-to-maturity	12,253			9,029
Held-to-maturity Securities, Fair Value	$ 12,433	[1]	$ 12,433	$ 8,971	[1]
Held-to-maturity Securities, Debt Maturities, Weighted Average Rate	2.68%

[1] * The carrying amount and amortized cost are the same for all held-to-maturity securities, as no OTTI has been recorded.