Investment Securities Investment Securities Amortized Cost and Estimated Fair Value (Details) - USD ($) $ in Thousands		6 Months Ended	12 Months Ended
		Sep. 30, 2015	Mar. 31, 2015
Schedule of Investments [Line Items]
Available-for-sale Securities, Amortized Cost Basis		$ 76,578	$ 102,230
Available-for-sale Securities, Gross Unrealized Gain		43	102
Available-for-sale Securities, Gross Unrealized Loss		(861)	(1,147)
Available-for-sale		75,760	101,185
Held-to-maturity Securities, Amortized Cost	[1]	16,087	11,922
Held-to-maturity Securities, Unrecognized Holding Gain	[1]	251	309
Held-to-maturity Securities, Unrecognized Holding Loss	[1]	(27)	0
Held-to-maturity Securities, Fair Value	[1]	16,311	12,231
securities amortized cost		92,665	114,152
Unrealized Gain on Securities		294	411
Unrealized Loss on Securities		(888)	(1,147)
Investments, Fair Value Disclosure		92,071	113,416
Government National Mortgage Association
Schedule of Investments [Line Items]
Available-for-sale Securities, Amortized Cost Basis		5,169	5,575
Available-for-sale Securities, Gross Unrealized Gain		18	9
Available-for-sale Securities, Gross Unrealized Loss		(5)	(57)
Available-for-sale		5,182	5,527
Held-to-maturity Securities, Amortized Cost	[1]	2,657	3,100
Held-to-maturity Securities, Unrecognized Holding Gain	[1]	167	232
Held-to-maturity Securities, Unrecognized Holding Loss	[1]	0	0
Held-to-maturity Securities, Fair Value	[1]	2,824	3,332
Federal Home Loan Mortgage Corporation
Schedule of Investments [Line Items]
Available-for-sale Securities, Amortized Cost Basis		8,398	10,705
Available-for-sale Securities, Gross Unrealized Gain		0	10
Available-for-sale Securities, Gross Unrealized Loss		(127)	(127)
Available-for-sale		8,271	10,588
Federal National Mortgage Association
Schedule of Investments [Line Items]
Available-for-sale Securities, Amortized Cost Basis		8,449	10,925
Available-for-sale Securities, Gross Unrealized Gain		0	35
Available-for-sale Securities, Gross Unrealized Loss		(77)	(103)
Available-for-sale		8,372	10,857
Held-to-maturity Securities, Amortized Cost	[1]	12,430	8,822
Held-to-maturity Securities, Unrecognized Holding Gain	[1]	84	77
Held-to-maturity Securities, Unrecognized Holding Loss	[1]	(27)	0
Held-to-maturity Securities, Fair Value	[1]	12,487	8,899
Other mortgage-backed securities
Schedule of Investments [Line Items]
Available-for-sale Securities, Amortized Cost Basis		46	47
Available-for-sale Securities, Gross Unrealized Gain		0	0
Available-for-sale Securities, Gross Unrealized Loss		0	0
Available-for-sale		46	47
Mortgage-backed securities
Schedule of Investments [Line Items]
Available-for-sale Securities, Amortized Cost Basis		22,062	27,252
Available-for-sale Securities, Gross Unrealized Gain		18	54
Available-for-sale Securities, Gross Unrealized Loss		(209)	(287)
Available-for-sale		21,871	27,019
Held-to-maturity Securities, Amortized Cost	[1]	15,087	11,922
Held-to-maturity Securities, Unrecognized Holding Gain	[1]	251	309
Held-to-maturity Securities, Unrecognized Holding Loss	[1]	(27)	0
Held-to-maturity Securities, Fair Value	[1]	15,311	12,231
US Government Agency Securities
Schedule of Investments [Line Items]
Available-for-sale Securities, Amortized Cost Basis		43,533	58,464
Available-for-sale Securities, Gross Unrealized Gain		25	48
Available-for-sale Securities, Gross Unrealized Loss		(418)	(662)
Available-for-sale		43,140	57,850
Other
Schedule of Investments [Line Items]
Available-for-sale Securities, Amortized Cost Basis		10,983	16,514
Available-for-sale Securities, Gross Unrealized Gain		0	0
Available-for-sale Securities, Gross Unrealized Loss		(234)	(198)
Available-for-sale		10,749	16,316
Held-to-maturity Securities, Amortized Cost	[1]		0
Held-to-maturity Securities, Unrecognized Holding Gain	[1]		0
Held-to-maturity Securities, Unrecognized Holding Loss	[1]		0
Held-to-maturity Securities, Fair Value	[1]		$ 0
Corporate Bond Securities [Member]
Schedule of Investments [Line Items]
Held-to-maturity Securities, Amortized Cost	[1]	1,000
Held-to-maturity Securities, Unrecognized Holding Gain	[1]	0
Held-to-maturity Securities, Unrecognized Holding Loss	[1]	0
Held-to-maturity Securities, Fair Value	[1]	$ 1,000

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