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INCOME TAXES - Effective Tax Rate Reconciliation (Details)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Income Tax Disclosure [Abstract]
Computed expected income tax expense at Federal statutory rate	21.00%	21.00%	21.00%
Increase (decrease) resulting from:
Proportional amortization	2.20%	4.30%	24.10%
Income tax credits (investment tax credits and other)	(2.80%)	(5.50%)	(30.60%)
Other permanent book-tax differences	0.50%	0.90%	1.90%
State tax expense, net of federal benefit	7.80%	7.00%	0.60%
Bank owned life insurance policies	(0.40%)	(0.70%)	(3.60%)
Equity compensation (windfall) shortfall tax impact	(0.10%)	(2.20%)	2.20%
Reserve for uncertain tax positions	0.00%	0.00%	(0.90%)
Other, net	0.20%	(0.30%)	(2.30%)
Effective tax rates	28.40%	24.50%	12.40%

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Effective Income Tax Rate Reconciliation, Other Permanent Book To Tax Differences, Percent

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Effective Income Tax Rate Reconciliation, Reserves, Uncertain Tax Position

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Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

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Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to amortization.

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Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to tax credits. Including, but not limited to, research credit, foreign tax credit, investment tax credit, and other tax credits.

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