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INVESTMENT SECURITIES (Tables) | 3 Months Ended
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Jun. 30, 2023
INVESTMENT SECURITIES |
Schedule of amortized cost and approximate fair value of investment securities | The amortized cost and approximate fair value of investment securities consisted of the following at the dates indicated (in thousands): ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | ​ | ​ |  | Gross |  | Gross |  | Estimated
​ | ​ | Amortized | ​ | Unrealized | ​ | Unrealized | ​ | Fair
​ | ​ | Cost | ​ | Gains | ​ | Losses | ​ | Value
June 30, 2023 |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |
Available for sale: |  | ​ | ​ |  | ​ |  |  | ​ |  |  | ​ |
Municipal securities | ​ | $ | 47,810 | ​ | $ | 24 | ​ | $ | (8,123) | ​ | $ | 39,711
Agency securities | ​ |  | 91,972 | ​ | ​ | — | ​ | ​ | (6,826) | ​ | ​ | 85,146
Real estate mortgage investment conduits (1) | ​ |  | 33,473 | ​ | ​ | — | ​ | ​ | (6,210) | ​ | ​ | 27,263
Residential mortgage-backed securities (1) | ​ |  | 15,738 | ​ | ​ | — | ​ | ​ | (1,201) | ​ | ​ | 14,537
Other mortgage-backed securities (2) | ​ |  | 42,315 | ​ | ​ | 5 | ​ | ​ | (4,658) | ​ | ​ | 37,662
Total available for sale | ​ | $ | 231,308 | ​ | $ | 29 | ​ | $ | (27,018) | ​ | $ | 204,319
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Held to maturity: | ​ |  | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Municipal securities | ​ | $ | 10,338 | ​ | $ | — | ​ | $ | (2,922) | ​ | $ | 7,416
Agency securities | ​ | ​ | 53,985 | ​ | ​ | — | ​ | ​ | (5,462) | ​ | ​ | 48,523
Real estate mortgage investment conduits (1) | ​ | ​ | 34,327 | ​ | ​ | — | ​ | ​ | (5,555) | ​ | ​ | 28,772
Residential mortgage-backed securities (1) | ​ | ​ | 120,651 | ​ | ​ | — | ​ | ​ | (18,517) | ​ | ​ | 102,134
Other mortgage-backed securities (3) | ​ | ​ | 20,552 | ​ | ​ | — | ​ | ​ | (3,628) | ​ | ​ | 16,924
Total held to maturity | ​ | $ | 239,853 | ​ | $ | — | ​ | $ | (36,084) | ​ | $ | 203,769
​ ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | ​ | ​ |  | Gross |  | Gross |  | ​ | ​
​ | ​ | Amortized | ​ | Unrealized | ​ | Unrealized | ​ | Estimated
​ | ​ | Cost | ​ | Gains | ​ | Losses | ​ | Fair Value
March 31, 2023 |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |
Available for sale: |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |
Municipal securities | ​ | $ | 47,857 | ​ | $ | 16 | ​ | $ | (7,612) | ​ | $ | 40,261
Agency securities | ​ |  | 91,858 | ​ | ​ | 23 | ​ | ​ | (5,974) | ​ | ​ | 85,907
Real estate mortgage investment conduits (1) | ​ |  | 34,247 | ​ | ​ | — | ​ | ​ | (5,370) | ​ | ​ | 28,877
Residential mortgage-backed securities (1) | ​ |  | 16,512 | ​ | ​ | — | ​ | ​ | (1,041) | ​ | ​ | 15,471
Other mortgage-backed securities (2) | ​ |  | 45,117 | ​ | ​ | 4 | ​ | ​ | (4,138) | ​ | ​ | 40,983
Total available for sale | ​ | $ | 235,591 | ​ | $ | 43 | ​ | $ | (24,135) | ​ | $ | 211,499
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Held to maturity: | ​ |  | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Municipal securities | ​ | $ | 10,344 | ​ | $ | — | ​ | $ | (2,859) | ​ | $ | 7,485
Agency securities | ​ | ​ | 53,941 | ​ | ​ | — | ​ | ​ | (5,091) | ​ | ​ | 48,850
Real estate mortgage investment conduits (1) | ​ | ​ | 35,186 | ​ | ​ | — | ​ | ​ | (4,769) | ​ | ​ | 30,417
Residential mortgage-backed securities (1) | ​ | ​ | 123,773 | ​ | ​ | — | ​ | ​ | (17,542) | ​ | ​ | 106,231
Other mortgage-backed securities (3) | ​ | ​ | 20,599 | ​ | ​ | — | ​ | ​ | (3,368) | ​ | ​ | 17,231
Total held to maturity | ​ | $ | 243,843 | ​ | $ | — | ​ | $ | (33,629) | ​ | $ | 210,214
​
(1) | Comprised of Federal Home Loan Mortgage Corporation (“FHLMC”), Federal National Mortgage Association (“FNMA”) and Ginnie Mae (“GNMA”) issued securities.
(2) | Comprised of U.S. Small Business Administration (“SBA”) issued securities and commercial real estate (“CRE”) secured securities issued by FNMA and FHLMC.
(3) | Comprised of FHLMC and FNMA issued securities.
Schedule of contractual maturities of investment securities | The contractual maturities of investment securities as of June 30, 2023 are as follows (in thousands): ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Available for Sale | ​ | Held to Maturity
​ |  | ​ | ​ |  | Estimated |  | ​ | ​ |  | Estimated
​ | ​ | Amortized | ​ | Fair | ​ | Amortized | ​ | Fair
​ | ​ | Cost | ​ | Value | ​ | Cost | ​ | Value
Due in one year or less | ​ | $ | 16,786 | ​ | $ | 16,525 | ​ | $ | 3 | ​ | $ | 3
Due after one year through five years | ​ |  | 82,986 | ​ |  | 77,344 | ​ |  | 42,253 | ​ |  | 39,101
Due after five years through ten years | ​ |  | 47,472 | ​ |  | 40,972 | ​ |  | 29,556 | ​ |  | 24,458
Due after ten years | ​ |  | 84,064 | ​ |  | 69,478 | ​ |  | 168,041 | ​ |  | 140,207
Total | ​ | $ | 231,308 | ​ | $ | 204,319 | ​ | $ | 239,853 | ​ | $ | 203,769
Schedule of temporarily impaired securities, fair value and unrealized losses | The fair value of temporarily impaired investment securities, the amount of unrealized losses and the length of time these unrealized losses existed are as follows at the dates indicated (in thousands):
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Less than 12 months | ​ | 12 months or longer | ​ | Total
​ |  | Estimated |  | ​ | ​ |  | Estimated |  | ​ | ​ |  | Estimated |  | ​ | ​
​ | ​ | Fair | ​ | Unrealized | ​ | Fair | ​ | Unrealized | ​ | Fair | ​ | Unrealized
June 30, 2023 | ​ | Value | ​ | Losses | ​ | Value | ​ | Losses | ​ | Value | ​ | Losses
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Available for sale: | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |
Municipal securities | ​ | $ | 3,388 | ​ | $ | (122) | ​ | $ | 35,128 | ​ | $ | (8,001) | ​ | $ | 38,516 | ​ | $ | (8,123)
Agency securities | ​ |  | 43,084 | ​ |  | (1,096) | ​ |  | 42,062 | ​ |  | (5,730) | ​ |  | 85,146 | ​ |  | (6,826)
Real estate mortgage investment conduits (1) | ​ |  | 2,561 | ​ |  | (151) | ​ |  | 24,702 | ​ |  | (6,059) | ​ |  | 27,263 | ​ |  | (6,210)
Residential mortgage-backed securities (1) | ​ |  | 2,685 | ​ |  | (164) | ​ |  | 11,852 | ​ |  | (1,037) | ​ |  | 14,537 | ​ |  | (1,201)
Other mortgage-backed securities (2) | ​ |  | 8,853 | ​ |  | (351) | ​ |  | 28,392 | ​ |  | (4,307) | ​ |  | 37,245 | ​ |  | (4,658)
Total available for sale | ​ | $ | 60,571 | ​ | $ | (1,884) | ​ | $ | 142,136 | ​ | $ | (25,134) | ​ | $ | 202,707 | ​ | $ | (27,018)
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Held to maturity: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Municipal securities | ​ | $ | — | ​ | $ | — | ​ | $ | 7,416 | ​ | $ | (2,922) | ​ | $ | 7,416 | ​ | $ | (2,922)
Agency securities | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 48,523 | ​ | ​ | (5,462) | ​ | ​ | 48,523 | ​ | ​ | (5,462)
Real estate mortgage investment conduits (1) | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 28,772 | ​ | ​ | (5,555) | ​ | ​ | 28,772 | ​ | ​ | (5,555)
Residential mortgage-backed securities (1) | ​ | ​ | 2 | ​ | ​ | — | ​ | ​ | 102,132 | ​ | ​ | (18,517) | ​ | ​ | 102,134 | ​ | ​ | (18,517)
Other mortgage-backed securities (3) | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 16,924 | ​ | ​ | (3,628) | ​ | ​ | 16,924 | ​ | ​ | (3,628)
Total held to maturity | ​ | $ | 2 | ​ | $ | — | ​ | $ | 203,767 | ​ | $ | (36,084) | ​ | $ | 203,769 | ​ | $ | (36,084)
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
March 31, 2023 |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Available for sale: |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |
Municipal securities | ​ | $ | 6,277 | ​ | $ | (133) | ​ | $ | 32,797 | ​ | $ | (7,479) | ​ | $ | 39,074 | ​ | $ | (7,612)
Agency securities | ​ | ​ | 43,451 | ​ |  | (747) | ​ |  | 36,646 | ​ |  | (5,227) | ​ |  | 80,097 | ​ |  | (5,974)
Real estate mortgage investment conduits (1) | ​ |  | 2,693 | ​ |  | (97) | ​ |  | 26,184 | ​ |  | (5,273) | ​ |  | 28,877 | ​ |  | (5,370)
Residential mortgage-backed securities (1) | ​ |  | 3,449 | ​ |  | (147) | ​ |  | 12,022 | ​ |  | (894) | ​ |  | 15,471 | ​ |  | (1,041)
Other mortgage-backed securities (2) | ​ |  | 13,876 | ​ |  | (376) | ​ |  | 26,619 | ​ |  | (3,762) | ​ |  | 40,495 | ​ |  | (4,138)
Total available for sale | ​ | $ | 69,746 | ​ | $ | (1,500) | ​ | $ | 134,268 | ​ | $ | (22,635) | ​ | $ | 204,014 | ​ | $ | (24,135)
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Held to maturity: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Municipal securities | ​ | $ | — | ​ | $ | — | ​ | $ | 7,485 | ​ | $ | (2,859) | ​ | $ | 7,485 | ​ | $ | (2,859)
Agency securities | ​ | ​ | 8,413 | ​ | ​ | (240) | ​ | ​ | 40,437 | ​ | ​ | (4,851) | ​ | ​ | 48,850 | ​ | ​ | (5,091)
Real estate mortgage investment conduits (1) | ​ | ​ | 2,580 | ​ | ​ | (191) | ​ | ​ | 27,837 | ​ | ​ | (4,578) | ​ | ​ | 30,417 | ​ | ​ | (4,769)
Residential mortgage-backed securities (1) | ​ | ​ | 2 | ​ | ​ | — | ​ | ​ | 106,229 | ​ | ​ | (17,542) | ​ | ​ | 106,231 | ​ | ​ | (17,542)
Other mortgage-backed securities (3) | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 17,231 | ​ | ​ | (3,368) | ​ | ​ | 17,231 | ​ | ​ | (3,368)
Total held to maturity | ​ | $ | 10,995 | ​ | $ | (431) | ​ | $ | 199,219 | ​ | $ | (33,198) | ​ | $ | 210,214 | ​ | $ | (33,629)
​
(1) | Comprised of FHLMC, FNMA and GNMA issued securities.
(2) | Comprised of SBA and CRE secured securities issued by FHLMC and FNMA.
(3) | Comprised of FHLMC and FNMA issued securities.

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- Definition Schedule (table) showing the fair value of temporarily impaired securities, the amount of unrealized losses and the length of time these unrealized losses existed, as of the dates indicated. + References No definition available. + Details
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- Definition Tabular disclosure of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -URI https://asc.fasb.org/topic&trid=2196928 + Details
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