Investment Securities Investment Securities Carrying Value (Amortized Cost) and Fair Value by remaining period of contractual maturity (Details) - USD ($) $ in Thousands		Sep. 30, 2015	Mar. 31, 2015
INVESTMENT SECURITIES [Abstract]
Available-for-sale Securities, Debt Maturities, Year Two Through Five, Amortized Cost Basis		$ 9,983
Available-for-sale Securities, Debt Maturities, Year Two Through Five, Fair Value		$ 9,965
Available-for-sale Securities, Debt Maturities, after One Through Five Years, Weighted Average Rate		1.44%
Available-for-sale Securities, Debt Maturities, Year Six Through Ten, Amortized Cost Basis		$ 19,183
Available-for-sale Securities, Debt Maturities, Year Six Through Ten, Fair Value		$ 18,891
Available-for-sale Securities, Debt Maturities, after Five Through Ten Years, Weighted Average Rate		1.99%
Available-for-sale Securities, Debt Maturities, after Ten Years, Amortized Cost Basis		$ 47,412
Available-for-sale Securities, Debt Maturities, after Ten Years, Fair Value		$ 46,904
Available-for-sale Securities, Debt Maturities, after Ten Years, Weighted Average Rate		1.56%
Available-for-sale Securities, Debt Maturities, Amortized Cost Basis		$ 76,578
Available-for-sale		$ 75,760	$ 101,185
Available-for-sale Securities, Debt Maturities, Weighted Average Rate		1.65%
Held-to-maturity Securities, Debt Maturities, after Five Through Ten Years, Net Carrying Amount		$ 7,076
Held-to-maturity Securities, Debt Maturities, Year Six Through Ten, Fair Value		$ 7,188
Held-to-maturity Securities, Debt Maturities, after Five Through Ten Years, Weighted Average Rate		3.00%
Held-to-maturity Securities, Debt Maturities, after Ten Years, Net Carrying Amount		$ 9,011
Held-to-maturity Securities, Debt Maturities, after Ten Years, Fair Value		$ 9,123
Held-to-maturity Securities, Debt Maturities, after Ten Years, Weighted Average Rate		2.51%
Held-to-maturity		$ 16,087	11,922
Held-to-maturity Securities, Fair Value	[1]	$ 16,311	$ 12,231
Held-to-maturity Securities, Debt Maturities, Weighted Average Rate		2.72%

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