Investment Securities Investment Securities-Unrealized Gain (Loss) on Investments (Details) - USD ($) $ in Thousands		Sep. 30, 2017	Mar. 31, 2017
Schedule of Held-to-maturity Securities [Line Items]
Held-to-maturity	[1]	$ 12,752	$ 13,435
Held-to-maturity, Gross Unrealized Gains	[1]	162	122
Held-to-maturity, Gross Unrealized Losses	[1]	22	60
Held-to-maturity, Fair Value	[1]	12,892	13,497
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale, Amortized Cost		57,918	60,951
Available-for-sale, Gross Unrealized Gains		0	0
Available-for-sale, Gross Unrealized Losses		1,432	1,940
Available-for-sale, Fair Value		56,486	59,011
Government National Mortgage Association (GNMA)
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale, Amortized Cost		2,272	2,576
Available-for-sale, Gross Unrealized Gains		0	0
Available-for-sale, Gross Unrealized Losses		47	89
Available-for-sale, Fair Value		2,225	2,487
Federal Home Loan Mortgage Corporation (FHLMC)
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale, Amortized Cost		7,285	8,053
Available-for-sale, Gross Unrealized Gains		0	0
Available-for-sale, Gross Unrealized Losses		130	195
Available-for-sale, Fair Value		7,155	7,858
Federal National Mortgage Association (FNMA)
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale, Amortized Cost		25,923	27,241
Available-for-sale, Gross Unrealized Gains		0	0
Available-for-sale, Gross Unrealized Losses		658	928
Available-for-sale, Fair Value		25,265	26,313
Mortgage Backed Securities, Other
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		35,525	37,915
Available-for-sale, Gross Unrealized Gains		0	0
Available-for-sale, Gross Unrealized Losses		835	1,212
Available-for-sale, Fair Value		34,690	36,703
US Government Agency Securities
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale, Amortized Cost		6,955	7,574
Available-for-sale, Gross Unrealized Gains		0	0
Available-for-sale, Gross Unrealized Losses		85	92
Available-for-sale, Fair Value		6,870	7,482
Corporate Bonds
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale, Amortized Cost		5,092	5,104
Available-for-sale, Gross Unrealized Gains		0	0
Available-for-sale, Gross Unrealized Losses		79	140
Available-for-sale, Fair Value		5,013	4,964
Other investments
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale, Amortized Cost	[2]	10,346	10,358
Available-for-sale, Gross Unrealized Gains	[2]	0	0
Available-for-sale, Gross Unrealized Losses	[2]	433	496
Available-for-sale, Fair Value	[2]	9,913	9,862
Government National Mortgage Association (GNMA)
Schedule of Held-to-maturity Securities [Line Items]
Held-to-maturity	[1]	1,649	1,797
Held-to-maturity, Gross Unrealized Gains	[1]	85	86
Held-to-maturity, Gross Unrealized Losses	[1]	0	0
Held-to-maturity, Fair Value	[1]	1,734	1,883
Federal National Mortgage Association (FNMA)
Schedule of Held-to-maturity Securities [Line Items]
Held-to-maturity	[1]	10,103	10,638
Held-to-maturity, Gross Unrealized Gains	[1]	42	12
Held-to-maturity, Gross Unrealized Losses	[1]	22	60
Held-to-maturity, Fair Value	[1]	10,123	10,590
Mortgage-backed securities
Schedule of Held-to-maturity Securities [Line Items]
Held-to-maturity	[1]	11,752	12,435
Held-to-maturity, Gross Unrealized Gains	[1]	127	98
Held-to-maturity, Gross Unrealized Losses	[1]	22	60
Held-to-maturity, Fair Value	[1]	11,857	12,473
Corporate Bonds
Schedule of Held-to-maturity Securities [Line Items]
Held-to-maturity	[1]	1,000	1,000
Held-to-maturity, Gross Unrealized Gains	[1]	35	24
Held-to-maturity, Gross Unrealized Losses	[1]	0	0
Held-to-maturity, Fair Value	[1]	$ 1,035	$ 1,024

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

[2] (1) Primarily comprised of an investment in a CRA fund with 95% of its underlying investments consisting of government and agency-backed securities.