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INVESTMENT SECURITIES - Held to maturity (Details) - USD ($) $ in Thousands | Mar. 31, 2022 | Mar. 31, 2021
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INVESTMENT SECURITIES |  |
Amortized Cost | $ 253,100 | $ 39,574
Gross Unrealized Losses | (17,071) | (1,354)
Estimated Fair Value | 236,029 | 38,220
Municipal securities |  |
INVESTMENT SECURITIES |  |
Amortized Cost | 10,368 | 10,391
Gross Unrealized Losses | (1,422) | (509)
Estimated Fair Value | 8,946 | 9,882
Agency securities |  |
INVESTMENT SECURITIES |  |
Amortized Cost | 45,277 | 7,688
Gross Unrealized Losses | (2,450) | (220)
Estimated Fair Value | 42,827 | 7,468
Real estate mortgage investment conduits |  |
INVESTMENT SECURITIES |  |
Amortized Cost | 39,394 | 9,207
Gross Unrealized Losses | (2,457) | (141)
Estimated Fair Value | 36,937 | 9,066
Residential mortgage-backed securities |  |
INVESTMENT SECURITIES |  |
Amortized Cost | 137,343 | 6,175
Gross Unrealized Losses | (8,883) | (119)
Estimated Fair Value | 128,460 | 6,056
Other mortgage-backed securities |  |
INVESTMENT SECURITIES |  |
Amortized Cost | 20,718 | 6,113
Gross Unrealized Losses | (1,859) | (365)
Estimated Fair Value | $ 18,859 | $ 5,748

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- Definition Amount excluding accrued interest, before allowance for credit loss, of investment in debt security measured at amortized cost (held-to-maturity). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 5 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=124255953&loc=SL82919230-210447 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 3B -URI http://asc.fasb.org/extlink&oid=124255953&loc=SL120267963-210447 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=124255206&loc=SL82895884-210446 + Details
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- Definition Amount of accumulated unrealized loss on investment in debt security measured at amortized cost (held-to-maturity). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=123581744&loc=d3e27232-111563 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5A -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=123581744&loc=SL120269820-111563 + Details
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