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VARIABLE INTEREST ENTITIES - Balances and Activity in Affordable Housing Partnerships (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2021 | Sep. 30, 2020 | Sep. 30, 2021 | Sep. 30, 2020 | Dec. 31, 2020
Variable Interest Entity [Line Items] |  |  |  |  |
Fundings |  |  | $ 6,320 | $ 17,346 |
Variable Interest Entity, Not Primary Beneficiary |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |
Maximum loss exposure |  |  | 27,977 |  |
Maximum loss exposure | $ 25,196 |  | 25,196 |  |
Income tax credits recognized | (491) | $ (185) | 280 | 111 |
Affordable Housing Fund Investment |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |
Unfunded commitment | 12,600 |  | 12,600 |  |
Affordable Housing Fund Investment | Variable Interest Entity, Not Primary Beneficiary |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |
Maximum loss exposure |  |  | 43,209 |  |
Aggregate funding commitment | 61,278 |  | 61,278 |  | $ 61,278
Total amount funded | 48,718 |  | 48,718 |  | 42,991
Unfunded commitment | 12,560 |  | 12,560 |  | $ 18,287
Maximum loss exposure | 40,095 |  | 40,095 |  |
Fundings | 3,563 | 1,602 | 5,727 | 15,473 |
Proportional amortization recognized | 1,051 | 1,724 | 3,114 | 4,019 |
Income tax credits recognized | $ 1,155 | $ 1,007 | $ 3,466 | $ 3,215 |

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- Definition Amount of amortization expense of investment in qualified affordable housing projects. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 740 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=116633289&loc=SL49122993-202985 + Details
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