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INVESTMENT SECURITIES: Temporarily Impaired Securities, Fair Value and Unrealized losses (Details 2) - USD ($) $ in Thousands | Mar. 31, 2018 | Mar. 31, 2017
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Available for sale: |  |  |
Less than 12 months, Estimated Fair Value |  | $ 111,145 | $ 161,967
Less than 12 months, Unrealized Losses |  | (2,696) | (2,754)
12 months or longer, Estimated Fair Value |  | 100,060 | 3,442
12 months or longer, Unrealized Losses |  | (3,515) | (55)
Total, Estimated Fair Value |  | 211,205 | 165,409
Total, Unrealized Losses |  | (6,211) | (2,809)
Municipal securities |  |  |
Available for sale: |  |  |
Less than 12 months, Estimated Fair Value |  | 6,626 | 2,819
Less than 12 months, Unrealized Losses |  | (236) | (117)
12 months or longer, Estimated Fair Value |  | 2,106 | 0
12 months or longer, Unrealized Losses |  | (73) | 0
Total, Estimated Fair Value |  | 8,732 | 2,819
Total, Unrealized Losses |  | (309) | (117)
Agency securities |  |  |
Available for sale: |  |  |
Less than 12 months, Estimated Fair Value |  | 5,301 | 15,785
Less than 12 months, Unrealized Losses |  | (112) | (203)
12 months or longer, Estimated Fair Value |  | 15,797 | 0
12 months or longer, Unrealized Losses |  | (199) | 0
Total, Estimated Fair Value |  | 21,098 | 15,785
Total, Unrealized Losses |  | (311) | (203)
Real estate mortgage investment conduits |  |  |
Available for sale: |  |  |
Less than 12 months, Estimated Fair Value | [1] | 31,922 | 32,221
Less than 12 months, Unrealized Losses | [1] | (774) | (399)
12 months or longer, Estimated Fair Value | [1] | 14,983 | 0
12 months or longer, Unrealized Losses | [1] | (581) | 0
Total, Estimated Fair Value | [1] | 46,905 | 32,221
Total, Unrealized Losses | [1] | (1,355) | (399)
Residential mortgage-backed securities |  |  |
Available for sale: |  |  |
Less than 12 months, Estimated Fair Value | [2] | 50,941 | 74,388
Less than 12 months, Unrealized Losses | [2] | (1,192) | (1,232)
12 months or longer, Estimated Fair Value | [2] | 37,823 | 602
12 months or longer, Unrealized Losses | [2] | (1,523) | (10)
Total, Estimated Fair Value | [2] | 88,764 | 74,990
Total, Unrealized Losses | [2] | (2,715) | (1,242)
Other mortgage-backed securities |  |  |
Available for sale: |  |  |
Less than 12 months, Estimated Fair Value | [3] | 16,355 | 36,754
Less than 12 months, Unrealized Losses | [3] | (382) | (803)
12 months or longer, Estimated Fair Value | [3] | 29,351 | 2,840
12 months or longer, Unrealized Losses | [3] | (1,139) | (45)
Total, Estimated Fair Value | [3] | 45,706 | 39,594
Total, Unrealized Losses | [3] | $ (1,521) | $ (848)
[1] | Comprised of FHLMC and FNMA issued securities.
[2] | Comprised of FHLMC, FNMA and GNMA issued securities.
[3] | Comprised of SBA and CRE secured securities issued by FNMA.

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