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INVESTMENT SECURITIES - Additional information (Details) - USD ($) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2021 | Mar. 31, 2022 | Mar. 31, 2021 | Mar. 31, 2020
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 | $ 17,800,000
Gross realized gains on sales of investment securities |  | 0 | 0 | $ 30,000
Investment securities available for sale |  |  |  |
INVESTMENT SECURITIES |  |  |  |
Pledged as collateral at amortized cost |  | 1,300,000 | 5,300,000 |
Pledged as collateral at fair value |  | 1,200,000 | 5,400,000 |
Investment securities held to maturity |  |  |  |
INVESTMENT SECURITIES |  |  |  |
Pledged as collateral at amortized cost |  | 13,700,000 | 3,100,000 |
Pledged as collateral at fair value |  | $ 12,600,000 | $ 3,000,000.0 |

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 The amortized cost of investment securities pledged as collateral for government public funds held by the bank, as of the date indicated. + References No definition available. + Details
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- Definition Amount of unrealized and realized gain (loss) on investment in debt and equity securities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(9)(a)) -URI http://asc.fasb.org/extlink&oid=123367319&loc=SL114868664-224227 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(7)(c)) -URI http://asc.fasb.org/extlink&oid=123367319&loc=SL114868664-224227 + Details
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- Definition Amount, after tax, of adjustment from accumulated other comprehensive income (loss) for amortization of gain (loss) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale) from transfer to investment in debt security measured at amortized cost (held-to-maturity). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=124509347&loc=SL7669686-108580 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 35 -Paragraph 10B -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=124260725&loc=SL120268667-111560 + Details
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- Definition The sum of the fair values, as of the date of each statement of financial position presented, of securities that are restricted as collateral for the payment of related debt obligations, primarily secured borrowings and repurchase agreements, and that are reclassified and separately reported in the statement of financial position because the transferee has the right by contract or custom to sell or re-pledge them. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=66007379&loc=d3e113888-111728 + Details
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- Definition The cash inflow associated with the sale of securities classified as trading securities and held for investment purposes. Excludes proceeds from trading securities purchased and held principally for the purpose of selling them in the near term (thus held for only a short period of time). + References No definition available. + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition Amount of unrealized gain (loss) on investment. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3602-108585 + Details
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