FAIR VALUE DISCLOSURES, Changes in Fair Value for Financial Assets (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Changes in fair value for financial assets [Abstract]
Equity securities at fair value			$ 167
Loans held for sale	$ (2,805)	$ 1,962	637
Capitalized mortgage loan servicing rights, net gains (losses)	(2,108)	(16,224)	(9,532)
Impairment charges recognized [Abstract]
Collateral dependent loans, carrying amount	1,400	9,100
Collateral dependent loans, valuation allowance	600	1,800
Additional provision for credit losses on collateral dependent loans	300	700	1,300
Other real estate, carrying amount	0	100
Other real estate, valuation allowance	31	90	92	$ 144
Other real estate, additional charge	0	30	30
Securities [Member]
Changes in fair value for financial assets [Abstract]
Equity securities at fair value			167
Mortgage Loans [Member]
Changes in fair value for financial assets [Abstract]
Loans held for sale	(2,805)	1,962	637
Mortgage Loan Servicing, Net [Member]
Changes in fair value for financial assets [Abstract]
Capitalized mortgage loan servicing rights, net gains (losses)	$ (2,108)	$ (16,224)	$ (9,532)

Loans which are measured for impairment using the fair value of collaterals.

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The valuation allowance on loans measured for impairment, using the fair value of collaterals.

+ References

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Amount of unrealized gain (loss) on loans held for sale measured at fair value with change in fair value recognized in net income.

+ References

No definition available.

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Carrying amount of other real estate that are impaired, net reserves.

+ References

No definition available.

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Amount of unrealized gain (loss) on capitalized servicing rights measured at fair value with change in fair value recognized in net income.

+ References

No definition available.

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Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill.

+ References

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Amount of unrealized gain (loss) on investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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Amount of expense (reversal of expense) for expected credit loss on accounts receivable.

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For each period for which an income statement is required, disclosure of the changes in the allowance, including balances at end of period.

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