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CONTINGENCIES - Trust Department Tax Reporting Contingency (Details) - Trust Department Tax Reporting Contingency - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Trust Department Tax Reporting Contingency
Loss Contingency, Loss in Period	$ 0	$ 200,000	$ 107,000	$ 500,000
Accrued Interest and Other Liabilities
Trust Department Tax Reporting Contingency
Tax compliance matters	$ 429,000		$ 429,000		$ 322,000

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Amount of loss contingency liability.

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