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INVESTMENT SECURITIES (Details 4) - USD ($) $ in Thousands | Dec. 31, 2018 | Mar. 31, 2018
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Debt Securities, Available-for-sale [Line Items] |  |  |  |  |
Less than 12 months, Estimated Fair Value |  | $ 9,480 |  | $ 111,145 |
Less than 12 months, Unrealized Losses |  | (132) |  | (2,696) |
12 months or longer, Estimated Fair Value |  | 168,775 |  | 100,060 |
12 months or longer, Unrealized Losses |  | (5,519) |  | (3,515) |
Total, Estimated Fair Value |  | 178,255 |  | 211,205 |
Total, Unrealized Losses |  | (5,651) |  | (6,211) |
Municipal securities |  |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |  |
Less than 12 months, Estimated Fair Value |  | 1,103 |  | 6,626 |
Less than 12 months, Unrealized Losses |  | (41) |  | (236) |
12 months or longer, Estimated Fair Value |  | 6,415 |  | 2,106 |
12 months or longer, Unrealized Losses |  | (206) |  | (73) |
Total, Estimated Fair Value |  | 7,518 |  | 8,732 |
Total, Unrealized Losses |  | (247) |  | (309) |
Agency securities |  |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |  |
Less than 12 months, Estimated Fair Value |  | 1,001 |  | 5,301 |
Less than 12 months, Unrealized Losses |  | (2) |  | (112) |
12 months or longer, Estimated Fair Value |  | 9,164 |  | 15,797 |
12 months or longer, Unrealized Losses |  | (244) |  | (199) |
Total, Estimated Fair Value |  | 10,165 |  | 21,098 |
Total, Unrealized Losses |  | (246) |  | (311) |
Real estate mortgage investment conduits |  |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |  |
Less than 12 months, Estimated Fair Value |  | 2,126 | [1] | 31,922 | [2]
Less than 12 months, Unrealized Losses |  | (11) | [1] | (774) | [2]
12 months or longer, Estimated Fair Value |  | 39,284 | [1] | 14,983 | [2]
12 months or longer, Unrealized Losses |  | (1,100) | [1] | (581) | [2]
Total, Estimated Fair Value |  | 41,410 | [1] | 46,905 | [2]
Total, Unrealized Losses |  | (1,111) | [1] | (1,355) | [2]
Residential mortgage-backed securities |  |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |  |
Less than 12 months, Estimated Fair Value | [1] | 4,273 |  | 50,941 |
Less than 12 months, Unrealized Losses | [1] | (64) |  | (1,192) |
12 months or longer, Estimated Fair Value | [1] | 73,365 |  | 37,823 |
12 months or longer, Unrealized Losses | [1] | (2,501) |  | (1,523) |
Total, Estimated Fair Value | [1] | 77,638 |  | 88,764 |
Total, Unrealized Losses | [1] | (2,565) |  | (2,715) |
Other mortgage-backed securities |  |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |  |
Less than 12 months, Estimated Fair Value | [3] | 977 |  | 16,355 |
Less than 12 months, Unrealized Losses | [3] | (14) |  | (382) |
12 months or longer, Estimated Fair Value | [3] | 40,547 |  | 29,351 |
12 months or longer, Unrealized Losses | [3] | (1,468) |  | (1,139) |
Total, Estimated Fair Value | [3] | 41,524 |  | 45,706 |
Total, Unrealized Losses | [3] | $ (1,482) |  | $ (1,521) |
[1] | Comprised of FHLMC, FNMA and GNMA issued securities
[2] | Comprised of FHLMC and FNMA issued securities.
[3] | Comprised of SBA issued and CRE secured securities issued by FNMA.

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