Investment Securities Investment Securities-Unrealized Gain (Loss) on Investments (Details) - USD ($) $ in Thousands		Dec. 31, 2017	Mar. 31, 2017
Schedule of Held-to-maturity Securities [Line Items]
Held-to-maturity	[1]	$ 12,394	$ 13,435
Held-to-maturity, Gross Unrealized Gains	[1]	94	122
Held-to-maturity, Gross Unrealized Losses	[1]	72	60
Held-to-maturity, Fair Value	[1]	12,416	13,497
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale, Amortized Cost		56,824	60,951
Available-for-sale, Gross Unrealized Gains		0	0
Available-for-sale, Gross Unrealized Losses		1,737	1,940
Available-for-sale, Fair Value		55,087	59,011
Government National Mortgage Association (GNMA)
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale, Amortized Cost		2,218	2,576
Available-for-sale, Gross Unrealized Gains		0	0
Available-for-sale, Gross Unrealized Losses		69	89
Available-for-sale, Fair Value		2,149	2,487
Federal Home Loan Mortgage Corporation (FHLMC)
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale, Amortized Cost		6,903	8,053
Available-for-sale, Gross Unrealized Gains		0	0
Available-for-sale, Gross Unrealized Losses		167	195
Available-for-sale, Fair Value		6,736	7,858
Federal National Mortgage Association (FNMA)
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale, Amortized Cost		25,275	27,241
Available-for-sale, Gross Unrealized Gains		0	0
Available-for-sale, Gross Unrealized Losses		785	928
Available-for-sale, Fair Value		24,490	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		34,441	37,915
Available-for-sale, Gross Unrealized Gains		0	0
Available-for-sale, Gross Unrealized Losses		1,021	1,212
Available-for-sale, Fair Value		33,420	36,703
US Government Agency Securities
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale, Amortized Cost		6,952	7,574
Available-for-sale, Gross Unrealized Gains		0	0
Available-for-sale, Gross Unrealized Losses		124	92
Available-for-sale, Fair Value		6,828	7,482
Corporate Bonds
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale, Amortized Cost		5,085	5,104
Available-for-sale, Gross Unrealized Gains		0	0
Available-for-sale, Gross Unrealized Losses		96	140
Available-for-sale, Fair Value		4,989	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]	496	496
Available-for-sale, Fair Value	[2]	9,850	9,862
Government National Mortgage Association (GNMA)
Schedule of Held-to-maturity Securities [Line Items]
Held-to-maturity	[1]	1,517	1,797
Held-to-maturity, Gross Unrealized Gains	[1]	59	86
Held-to-maturity, Gross Unrealized Losses	[1]	0	0
Held-to-maturity, Fair Value	[1]	1,576	1,883
Federal National Mortgage Association (FNMA)
Schedule of Held-to-maturity Securities [Line Items]
Held-to-maturity	[1]	9,877	10,638
Held-to-maturity, Gross Unrealized Gains	[1]	0	12
Held-to-maturity, Gross Unrealized Losses	[1]	72	60
Held-to-maturity, Fair Value	[1]	9,805	10,590
Mortgage-backed securities
Schedule of Held-to-maturity Securities [Line Items]
Held-to-maturity	[1]	11,394	12,435
Held-to-maturity, Gross Unrealized Gains	[1]	59	98
Held-to-maturity, Gross Unrealized Losses	[1]	72	60
Held-to-maturity, Fair Value	[1]	11,381	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.