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Investment Securities-Unrealized Gain (Loss) on Investments (Details) - USD ($) $ in Thousands | Mar. 31, 2018 | Mar. 31, 2017
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Schedule of Held-to-maturity Securities [Line Items] |  |
Debt Securities, Held-to-maturity | $ 12,075 | $ 13,435
Held-to-maturity Securities, Gross Unrealized Gains | 81 | 122
Held-to-maturity Securities, Gross Unrealized Losses | 247 | 60
Debt Securities, Held-to-maturity, Fair Value | 11,909 | 13,497
Debt Securities, Available-for-sale [Line Items] |  |
Available-for-sale Securities, Amortized Cost | 63,435 | 60,951
Available-for-sale Securities, Gross Unrealized Gains | 0 | 0
Available-for-sale Securities, Gross Unrealized Losses | 2,726 | 1,940
Available-for-sale Securities | 60,709 | 59,011
Government National Mortgage Association (GNMA) |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Debt Securities, Held-to-maturity | 1,434 | 1,797
Held-to-maturity Securities, Gross Unrealized Gains | 51 | 86
Held-to-maturity Securities, Gross Unrealized Losses | 0 | 0
Debt Securities, Held-to-maturity, Fair Value | 1,485 | 1,883
Debt Securities, Available-for-sale [Line Items] |  |
Available-for-sale Securities, Amortized Cost | 2,163 | 2,576
Available-for-sale Securities, Gross Unrealized Gains | 0 | 0
Available-for-sale Securities, Gross Unrealized Losses | 97 | 89
Available-for-sale Securities | 2,066 | 2,487
Federal Home Loan Mortgage Corporation (FHLMC) |  |
Debt Securities, Available-for-sale [Line Items] |  |
Available-for-sale Securities, Amortized Cost | 6,633 | 8,053
Available-for-sale Securities, Gross Unrealized Gains | 0 | 0
Available-for-sale Securities, Gross Unrealized Losses | 283 | 195
Available-for-sale Securities | 6,350 | 7,858
Federal National Mortgage Association (FNMA) |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Debt Securities, Held-to-maturity | 9,641 | 10,638
Held-to-maturity Securities, Gross Unrealized Gains | 0 | 12
Held-to-maturity Securities, Gross Unrealized Losses | 247 | 60
Debt Securities, Held-to-maturity, Fair Value | 9,394 | 10,590
Debt Securities, Available-for-sale [Line Items] |  |
Available-for-sale Securities, Amortized Cost | 24,638 | 27,241
Available-for-sale Securities, Gross Unrealized Gains | 0 | 0
Available-for-sale Securities, Gross Unrealized Losses | 1,227 | 928
Available-for-sale Securities | 23,411 | 26,313
Mortgage-Backed Securities |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Debt Securities, Held-to-maturity | 11,075 | 12,435
Held-to-maturity Securities, Gross Unrealized Gains | 51 | 98
Held-to-maturity Securities, Gross Unrealized Losses | 247 | 60
Debt Securities, Held-to-maturity, Fair Value | 10,879 | 12,473
Debt Securities, Available-for-sale [Line Items] |  |
Available-for-sale Securities, Amortized Cost | 33,434 | 37,870
Available-for-sale Securities, Gross Unrealized Gains | 0 | 0
Available-for-sale Securities, Gross Unrealized Losses | 1,607 | 1,212
Available-for-sale Securities | 31,827 | 36,658
US Government Agency Securities |  |
Debt Securities, Available-for-sale [Line Items] |  |
Available-for-sale Securities, Amortized Cost | 14,490 | 7,574
Available-for-sale Securities, Gross Unrealized Gains | 0 | 0
Available-for-sale Securities, Gross Unrealized Losses | 258 | 92
Available-for-sale Securities | 14,232 | 7,482
Corporate Bonds |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Debt Securities, Held-to-maturity | 1,000 | 1,000
Held-to-maturity Securities, Gross Unrealized Gains | 30 | 24
Held-to-maturity Securities, Gross Unrealized Losses | 0 | 0
Debt Securities, Held-to-maturity, Fair Value | 1,030 | 1,024
Debt Securities, Available-for-sale [Line Items] |  |
Available-for-sale Securities, Amortized Cost | 5,078 | 5,104
Available-for-sale Securities, Gross Unrealized Gains | 0 | 0
Available-for-sale Securities, Gross Unrealized Losses | 212 | 140
Available-for-sale Securities | 4,866 | 4,964
Other investments |  |
Debt Securities, Available-for-sale [Line Items] |  |
Available-for-sale Securities, Amortized Cost | 10,433 | 10,403
Available-for-sale Securities, Gross Unrealized Gains | 0 | 0
Available-for-sale Securities, Gross Unrealized Losses | 649 | 496
Available-for-sale Securities | $ 9,784 | $ 9,907

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