INCOME TAXES - Reconciliation of Income Tax Expense (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
INCOME TAXES [Abstract]
Computed income tax at statutory rate	$ 149,038,000	$ 167,844,000	$ 160,431,000
Federal and state taxes	10,008,000	10,268,000	7,014,000
Benefit of net exempt income	(35,153,000)	(31,266,000)	(20,717,000)
Disallowed NOL carryforwards resulting from net exempt income	0	14,221,000	8,791,000
Deferred tax valuation allowance	0	(8,410,000)	(13,572,000)
Share based compensation windfall	(2,134,000)	(1,492,000)	(1,044,000)
Preferential tax treatment on qualified investing and lending activities	(19,125,000)	(4,500,000)	0
Other permanent differences	(5,138,000)	(3,147,000)	(1,185,000)
Tax return to provision adjustments	(1,709,000)	(519,000)	(406,000)
Other-net	(1,215,000)	(487,000)	7,480,000
Total income tax expense	$ 94,572,000	$ 142,512,000	$ 146,792,000
Computed income tax at statutory tax rate %	37.50%	37.50%	37.50%
Federal and state taxes %	2.40%	2.20%	1.60%
Benefit of net exempt income %	(8.80%)	(7.00%)	(4.80%)
Disallowed NOL carryforward resulting from net exempt income %	0.00%	3.20%	2.00%
Deferred tax valuation allowance %	0.00%	(1.90%)	(3.20%)
Share based compensation windfall %	(0.50%)	(0.30%)	(0.20%)
Preferential tax treatment on qualified investing and lending activities %	(4.80%)	(1.00%)	0.00%
Other permanent differences %	(1.30%)	(0.70%)	(0.30%)
Tax-return provision adjustments %	(0.40%)	(0.10%)	(0.10%)
Other-net %	(0.30%)	(0.10%)	1.70%
Total income tax expense (benefit) %	23.80%	31.80%	34.20%