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GOODWILL, OTHER INTANGIBLE ASSETS AND MORTGAGE SERVICING RIGHTS (Mortgage Servicing Rights) (Details) - USD ($) $ in Thousands | 3 Months Ended |
--- | --- | ---
Mar. 31, 2022 | Mar. 31, 2021 | Dec. 31, 2021
Servicing Asset at Amortized Value, Balance [Roll Forward] |  |  |  |
Additions—through purchase |  | $ 62 | $ 27 |
Servicing Contracts [Member] |  |  |  |
Morgage Servicing Rights at Amortized Value [Line Items] |  |  |  |
Loans Serviced For Others |  | 2,840,000 |  | $ 2,770,000
Custodial Accounts |  | 3,500 |  | $ 3,200
Servicing Asset at Amortized Value, Balance [Roll Forward] |  |  |  |
Balance, net of valuation allowance, beginning of the period |  | 17,206 | 15,223 |
Additions—amounts capitalized |  | 1,953 | 2,010 |
Amortization | [1] | (1,231) | (1,853) |
Servicing Asset at Fair Value, Other Changes in Fair Value |  | (18) | 0 |
Balance, net of valuation allowance, end of the period | [2] | 18,008 | $ 15,407 |
Valuation allowance, end of period |  | $ 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 March 31, 2022 and 2021.

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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 -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 50 -Section 50 -Paragraph 4 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=125521744&loc=d3e122739-111746 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 50 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6469459&loc=d3e122492-111745 Reference 3: http://www.xbrl.org/2003/role/recommendedDisclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 50 -Section 45 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6469459&loc=d3e122501-111745 + Details
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- Definition Amount of amortization 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 -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 50 -Section 50 -Paragraph 4 -Subparagraph (a)(4) -URI http://asc.fasb.org/extlink&oid=125521744&loc=d3e122739-111746 + Details
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- Definition Reflects the estimated amount of impairment as of the balance sheet date of recognized servicing assets that are being amortized in proportion to and over the period of estimated net servicing income or loss. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 50 -Section 50 -Paragraph 4 -Subparagraph (e)(1) -URI http://asc.fasb.org/extlink&oid=125521744&loc=d3e122739-111746 + Details
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