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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.

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