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INCOME TAXES - Reconciliation of Effective Income Tax Rate to Statutory Federal Rate (Detail)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Income Tax Disclosure [Abstract]
Statutory federal tax rate	21.00%	21.00%	21.00%
Increase (decrease) resulting from:
State taxes, net of federal benefit	1.50%	1.60%	1.10%
Tax exempt interest income	(2.50%)	(4.10%)	(1.70%)
Income from life insurance	(0.80%)	(1.30%)	(0.90%)
Disallowed interest expense	1.10%	0.30%	0.00%
Low-income housing credits and related expenses	(0.10%)	(0.20%)	(0.20%)
Merger-related expenses	0.30%	0.00%	0.00%
Share-based compensation and related expenses	(0.10%)	(0.50%)	0.20%
Other	0.40%	0.40%	0.10%
Effective income tax rate	20.80%	17.20%	19.60%

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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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-Topic 740
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-Name Accounting Standards Codification
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-Paragraph 12
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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 other adjustments.

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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 state and local income tax contingency.

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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 income (loss) exempt from income taxes.

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