Investment Securities Investment Securities Amortized Cost and Estimated Fair Value (Details) - USD ($) $ in Thousands		6 Months Ended		12 Months Ended
		Sep. 30, 2016		Mar. 31, 2015	Mar. 31, 2016
Schedule of Held-to-maturity Securities [Line Items]
Held-to-maturity, Amortized Cost	[1]	$ 14,458			$ 15,311
Held-to-maturity, Gross Unrealized Gains	[1]	432			342
Held-to-maturity, Gross Unrealized Losses	[1]	0			0
Held-to-maturity, Fair Value	[1]	14,890			15,653
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale, Amortized Cost		54,016			56,486
Available-for-sale, Gross Unrealized Gains		63			72
Available-for-sale, Gross Unrealized Losses		329			378
Available-for-sale, Fair Value		53,750			56,180
securities amortized cost		68,474			71,797
Unrealized Gain on Securities		495		$ 414
Unrealized Loss on Securities		329		$ 378
Investments, Fair Value Disclosure		68,640			71,833
Government National Mortgage Association
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale, Amortized Cost		3,344			4,578
Available-for-sale, Gross Unrealized Gains		0			45
Available-for-sale, Gross Unrealized Losses		15			0
Available-for-sale, Fair Value		3,329			4,623
Federal Home Loan Mortgage Corporation Certificates and Obligations (FHLMC) [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale, Amortized Cost		6,782			7,778
Available-for-sale, Gross Unrealized Gains		13			0
Available-for-sale, Gross Unrealized Losses		43			100
Available-for-sale, Fair Value		6,752			7,678
Federal National Mortgage Association
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale, Amortized Cost		22,520			7,860
Available-for-sale, Gross Unrealized Gains		28			0
Available-for-sale, Gross Unrealized Losses		56			36
Available-for-sale, Fair Value		22,492			7,824
Mortgage Backed Securities, Other [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale, Amortized Cost		45			45
Available-for-sale, Gross Unrealized Gains		0			0
Available-for-sale, Gross Unrealized Losses		0			0
Available-for-sale, Fair Value		45			45
Mortgage-backed securities
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale, Amortized Cost		32,691			20,261
Available-for-sale, Gross Unrealized Gains		41			45
Available-for-sale, Gross Unrealized Losses		114			136
Available-for-sale, Fair Value		32,618			20,170
US Government Agency Securities
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale, Amortized Cost		5,849			26,077
Available-for-sale, Gross Unrealized Gains		22			27
Available-for-sale, Gross Unrealized Losses		0			35
Available-for-sale, Fair Value		5,871			26,069
Corporate Bond Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale, Amortized Cost		5,116
Available-for-sale, Gross Unrealized Gains		0
Available-for-sale, Gross Unrealized Losses		25
Available-for-sale, Fair Value		5,091
Other
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale, Amortized Cost		10,360			10,148
Available-for-sale, Gross Unrealized Gains		0			0
Available-for-sale, Gross Unrealized Losses		190			207
Available-for-sale, Fair Value		10,170			9,941
Government National Mortgage Association
Schedule of Held-to-maturity Securities [Line Items]
Held-to-maturity, Amortized Cost	[1]	2,068			2,379
Held-to-maturity, Gross Unrealized Gains	[1]	153			150
Held-to-maturity, Gross Unrealized Losses	[1]	0			0
Held-to-maturity, Fair Value	[2]	2,221			2,529
Federal National Mortgage Association
Schedule of Held-to-maturity Securities [Line Items]
Held-to-maturity, Amortized Cost	[1]	11,390			11,932
Held-to-maturity, Gross Unrealized Gains	[1]	254			192
Held-to-maturity, Gross Unrealized Losses	[1]	0			0
Held-to-maturity, Fair Value	[2]	11,644			12,124
Mortgage-backed securities
Schedule of Held-to-maturity Securities [Line Items]
Held-to-maturity, Amortized Cost	[1]	13,458			14,311
Held-to-maturity, Gross Unrealized Gains	[1]	407			342
Held-to-maturity, Gross Unrealized Losses	[1]	0			0
Held-to-maturity, Fair Value	[1]	13,865			14,653
Corporate Bond Securities [Member]
Schedule of Held-to-maturity Securities [Line Items]
Held-to-maturity, Amortized Cost		1,000	[1]		1,000
Held-to-maturity, Gross Unrealized Gains	[1]	25			0
Held-to-maturity, Gross Unrealized Losses		0	[1]		0	[2]
Held-to-maturity, Fair Value	[2]	$ 1,025			$ 1,000

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

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