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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.

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