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GOODWILL, OTHER INTANGIBLE ASSETS AND MORTGAGE SERVICING RIGHTS (Mortgage Servicing Rights) (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2023 | Sep. 30, 2022 | Sep. 30, 2023 | Sep. 30, 2022 | Dec. 31, 2022
Servicing Asset at Amortized Value, Balance [Roll Forward] |  |  |  |  |  |  |  |
Additions—through purchase |  |  |  |  |  | $ 222 | $ 202 |
Servicing Contracts [Member] |  |  |  |  |  |  |  |
Morgage Servicing Rights at Amortized Value [Line Items] |  |  |  |  |  |  |  |
Loans Serviced For Others |  | $ 2,760,000 |  |  |  | 2,760,000 |  | $ 2,770,000
Custodial Accounts |  | 29,100 |  |  |  | 29,100 |  | $ 11,200
Servicing Asset at Amortized Value, Balance [Roll Forward] |  |  |  |  |  |  |  |
Balance, net of valuation allowance, beginning of the period |  | 15,111 |  | $ 17,633 |  | 16,166 | 17,206 |
Additions—amounts capitalized |  | 638 |  | 296 |  | 1,123 | 3,053 |
Additions—through purchase |  | 98 |  | 57 |  |  |  |
Amortization (1) |  | (851) | [1] | (985) | [1] | (2,525) | (3,331) |
Servicing Asset at Fair Value, Other Changes in Fair Value |  | 128 |  | 72 |  | 118 | 201 |
Balance, net of valuation allowance, end of the period | [2] | 14,868 |  | $ 16,929 |  | 14,868 | $ 16,929 |
Valuation allowance, end of period |  | $ 0 |  |  |  | $ 0 |  |
[1] | Amortization of mortgage servicing rights is recorded as a reduction of loan servicing income within mortgage banking operations and any unamortized balance is fully amortized if the loan repays in full.
[2] | There was no valuation allowance on mortgage servicing rights as of both September 30, 2023 and 2022.(3) Fair value adjustments relate to SBA servicing rights. These adjustments are estimated based on an independent dealer analysis by discounting estimated net future cash flows from servicing SBA loans.

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- Definition Amortized amount of contract to service financial assets under which the benefits of servicing are expected to more than adequately compensate the servicer. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 860 -SubTopic 50 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Subparagraph (a)(1) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481229/860-50-50-4 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 860 -SubTopic 50 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481260/860-50-45-1 Reference 3: http://www.xbrl.org/2003/role/recommendedDisclosureRef -Topic 860 -SubTopic 50 -Name Accounting Standards Codification -Section 45 -Paragraph 2 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481260/860-50-45-2 + Details
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