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INVESTMENT SECURITIES: Schedule of Temporarily Impaired Securities, Fair Value and Unrealized losses (Details 2) - USD ($) $ in Thousands | Sep. 30, 2017 | Mar. 31, 2017
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Available for sale: |  |  |  |  |
Less than 12 months, Estimated Fair Value |  | $ 137,486 |  | $ 161,967 |
Less than 12 months, Unrealized Losses |  | (1,693) |  | (2,754) |
12 months or longer, Estimated Fair Value |  | 17,429 |  | 3,442 |
12 months or longer, Unrealized Losses |  | (288) |  | (55) |
Total, Estimated Fair Value |  | 154,915 |  | 165,409 |
Total, Unrealized Losses |  | (1,981) |  | (2,809) |
Municipal securities |  |  |  |  |
Available for sale: |  |  |  |  |
Less than 12 months, Estimated Fair Value |  | 4,140 |  | 2,819 |
Less than 12 months, Unrealized Losses |  | (42) |  | (117) |
Total, Estimated Fair Value |  | 4,140 |  | 2,819 |
Total, Unrealized Losses |  | (42) |  | (117) |
Agency securities |  |  |  |  |
Available for sale: |  |  |  |  |
Less than 12 months, Estimated Fair Value |  | 16,274 |  | 15,785 |
Less than 12 months, Unrealized Losses |  | (125) |  | (203) |
12 months or longer, Estimated Fair Value |  | 4,990 |  |  |
12 months or longer, Unrealized Losses |  | (10) |  |  |
Total, Estimated Fair Value |  | 21,264 |  | 15,785 |
Total, Unrealized Losses |  | (135) |  | (203) |
Real estate mortgage investment conduits |  |  |  |  |
Available for sale: |  |  |  |  |
Less than 12 months, Estimated Fair Value |  | 26,962 | [1] | 32,221 | [2]
Less than 12 months, Unrealized Losses |  | (281) | [1] | (399) | [2]
Total, Estimated Fair Value |  | 26,962 | [1] | 32,221 | [2]
Total, Unrealized Losses |  | (281) | [1] | (399) | [2]
Residential mortgage-backed securities |  |  |  |  |
Available for sale: |  |  |  |  |
Less than 12 months, Estimated Fair Value | [1] | 58,627 |  | 74,388 |
Less than 12 months, Unrealized Losses | [1] | (655) |  | (1,232) |
12 months or longer, Estimated Fair Value | [1] | 5,481 |  | 602 |
12 months or longer, Unrealized Losses | [1] | (115) |  | (10) |
Total, Estimated Fair Value | [1] | 64,108 |  | 74,990 |
Total, Unrealized Losses | [1] | (770) |  | (1,242) |
Other mortgage-backed securities |  |  |  |  |
Available for sale: |  |  |  |  |
Less than 12 months, Estimated Fair Value |  | 31,483 | [3] | 36,754 | [4]
Less than 12 months, Unrealized Losses |  | (590) | [3] | (803) | [4]
12 months or longer, Estimated Fair Value |  | 6,958 | [3] | 2,840 | [4]
12 months or longer, Unrealized Losses |  | (163) | [3] | (45) | [4]
Total, Estimated Fair Value |  | 38,441 | [3] | 39,594 | [4]
Total, Unrealized Losses |  | $ (753) | [3] | $ (848) | [4]
[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 FHLMC.
[4] | Comprised of SBA issued and CRE secured securities issued by FNMA.

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