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INVESTMENT SECURITIES - Additional information (Details) - USD ($) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2021 | Mar. 31, 2023 | Mar. 31, 2022 | Mar. 31, 2021
INVESTMENT SECURITIES |  |  |  |
Available for sale securities transferred to held to maturity | $ 85,800,000 |  |  |
Unrealized after tax gain | 18,000 |  |  |
Gains (losses) recognized at time of transfer | $ 0 |  |  |
Proceeds from the sale of investment securities |  | $ 0 | $ 0 | $ 0
Gross realized gains on sales of investment securities |  | 0 | 0 | $ 0
Available for sale with amortized cost |  | 235,591,000 | 178,874,000 |
Available for sale, estimated fair value |  | 211,499,000 | 165,782,000 |
Debt Securities, Held-to-maturity, Fair Value |  | 210,214,000 | 236,029,000 |
Asset Pledged as Collateral. |  |  |  |
INVESTMENT SECURITIES |  |  |  |
Available for sale with amortized cost |  | 3,200,000 | 1,300,000 |
Available for sale, estimated fair value |  | 2,900,000 | 1,200,000 |
Held to maturity at amortized cost |  | 12,300,000 | 13,700,000 |
Debt Securities, Held-to-maturity, Fair Value |  | $ 10,400,000 | $ 12,600,000 |

X
- Definition Amount, after allowance for credit loss, of debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale) transferred to investment in debt security measured at amortized cost (held-to-maturity). + References No definition available. + Details
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- Definition Amortized cost excluding accrued interest, before allowance for credit loss, 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/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 45 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=124258926&loc=SL82898722-210454 + Details
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