INCOME TAXES - Reconciliation of Effective Income Tax Rate to Statutory Federal Rate (Detail)	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Income Tax Disclosure [Abstract]
Statutory federal tax rate	21.00%	21.00%	21.00%
Increase (decrease) resulting from:
State taxes, net of federal benefit	2.30%	1.50%	1.60%
Tax exempt interest income	(4.60%)	(2.50%)	(4.10%)
Income from life insurance	(2.10%)	(0.80%)	(1.30%)
Disallowed interest expense	2.80%	1.10%	0.30%
Low-income housing credits and related expenses	(0.20%)	(0.10%)	(0.20%)
Merger-related expenses	1.30%	0.30%	0.00%
Share-based compensation and related expenses	(0.90%)	(0.10%)	(0.50%)
Other	1.10%	0.40%	0.40%
Effective income tax rate	20.70%	20.80%	17.20%