INCOME TAXES - Schedule of Income Tax Rates (Details 1) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Income Tax Expense (Benefit), Continuing Operations, Income Tax Reconciliation [Abstract]
Computed statutory federal income tax provision	$ 51,897	$ 66,178	$ 73,028
State taxes, net of federal tax benefit	12,143	17,992	19,728
Low Income Housing Project Investments	(4,496)	(3,740)	(3,364)
Nontaxable interest, net	(3,653)	(3,508)	(3,191)
Increase in cash surrender value of life insurance	(1,794)	(2,133)	(1,885)
Effective Income Tax Rate Reconciliation, Increase in uncertain positions, amount	$ (1,215)	$ (655)	$ (1,035)
Effective Income Tax Rate Reconciliation, Revaluation of Net Deferred Tax Asset, Percent	(0.01%)	0.08%	0.00%
Effective Income Tax Rate Reconciliation, Revaluation of Net Deferred Tax Assets	$ (29)	$ 255	$ 0
Stock-based compensation	165	(127)	(202)
Change in valuation allowance	$ 65	$ 109	$ 52
Other tax credits	0.00%	(0.02%)	0.00%
Other tax credits	$ 0	$ (76)	$ 0
Other, net	1,963	1,337	810
Income tax benefit	$ 55,046	$ 75,632	$ 83,941
Effective Income Tax Rate, Continuing Operations, Tax Rate Reconciliation [Abstract]
Computed statutory federal income tax provision	21.00%	21.00%	21.00%
State taxes, net of federal tax benefit	4.91%	5.71%	5.67%
Low Income Housing Project Investments	(1.82%)	(1.19%)	(0.97%)
Nontaxable interest, net	(1.48%)	(1.11%)	(0.92%)
Increase in cash surrender value of life insurance	(0.73%)	(0.68%)	(0.54%)
Increase (decrease) in uncertain positions	(0.49%)	(0.21%)	(0.30%)
Stock-based compensation	0.07%	(0.04%)	(0.06%)
Change in valuation allowance	0.03%	0.03%	0.01%
Other, net	0.79%	0.43%	0.25%
Total expense	22.27%	24.00%	24.14%