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LOANS AND ALLOWANCE FOR CREDIT LOSSES - Mortgage Banking (Details) - USD ($) $ in Thousands	12 Months Ended		24 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2020
Accounts, Notes, Loans and Financing Receivable [Line Items]
Servicing loans for participants	$ 653,400	$ 596,300	$ 596,300
Contractually specified servicing fees	1,600		1,300
Servicing Asset at Amortized Cost, Balance [Roll Forward]
Balance at beginning of year	3,353	3,001
Additions	565	597
Amortization	(245)	(245)
Balance at end of year	3,673	3,353	3,353
Total residential loans included in held for sale loans	5,523	23,988	23,988
Residential mortgages | Total residential real estate
Servicing Asset at Amortized Cost, Balance [Roll Forward]
Total residential loans included in held for sale loans	5,400	24,000	24,000
Forward delivery commitments	14,800	50,600	$ 50,600
Adjustments to fair value of loans	113
Sale of loans	189,300	226,400
Net gains on sales of loans	$ 4,100	$ 5,300

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The amount of forward delivery commitments.

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The amount of adjustments to fair value of loans designated as held for sale.

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Income from mortgage banking activities (fees and commissions) and servicing real estate mortgages, credit cards, and other financial assets held by others net of any related impairment of capitalized service costs. Also includes any premiums received in lieu of regular servicing fees on such loans only as earned over the life of the loans.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher SEC
-Name Regulation S-K (SK)
-Number 229
-Section 1402
-Subsection Instruction 3

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Amount of gain (loss) on sale of financing receivable.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 860
-SubTopic 20
-Section 50
-Paragraph 5
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Amount, before valuation allowance, of financing receivable classified as held-for-sale.

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The cash inflow associated with the sale of loans receivables arising from the financing of goods and services.

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Aggregate amount of servicing assets that are subsequently measured at fair value and servicing assets that are subsequently measured using the amortization method.

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Amortized amount of contract to service financial assets under which the benefits of servicing are expected to more than adequately compensate the servicer.

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Amount of additions from purchases, assumption or transfer to contract to service financial assets under which the benefits of servicing are expected to more than adequately compensate the servicer.

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Amount of amortization of contract to service financial assets under which the benefits of servicing are expected to more than adequately compensate the servicer.

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