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LOANS AND ALLOWANCE FOR CREDIT LOSSES - Allowance for Loan Losses (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance, Allowance	$ 341,567	$ 336,218	$ 338,084	$ 307,100
Provision for loan losses	11,176	6,313	30,805	57,184
Loans charged off	(13,631)	(15,352)	(43,241)	(50,654)
Recoveries of loans previously charged off	6,182	7,278	19,646	20,827
Ending balance, Allowance	345,294	334,457	345,294	334,457
Commercial and industrial
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance, Allowance	88,985	66,542	87,242	64,053
Provision for loan losses	6,570	8,463	22,303	31,479
Loans charged off	(9,992)	(12,316)	(32,368)	(40,150)
Recoveries of loans previously charged off	3,786	4,979	12,172	12,286
Ending balance, Allowance	89,349	67,668	89,349	67,668
Consumer
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance, Allowance	6,573	3,479	7,327	3,952
Provision for loan losses	(630)	1,222	(77)	2,102
Loans charged off	(720)	(853)	(2,573)	(2,974)
Recoveries of loans previously charged off	237	309	783	1,077
Ending balance, Allowance	5,460	4,157	5,460	4,157
Mortgage warehouse
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance, Allowance	2,280	2,142	2,262	1,678
Provision for loan losses	(72)	30	(54)	494
Loans charged off	0	0	0	0
Recoveries of loans previously charged off	0	0	0	0
Ending balance, Allowance	2,208	2,172	2,208	2,172
Municipal
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance, Allowance	58	60	58	345
Provision for loan losses	0	137	0	(148)
Loans charged off	0	0	0	0
Recoveries of loans previously charged off	0	0	0	0
Ending balance, Allowance	58	197	58	197
Premium finance
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance, Allowance	783	702	736	602
Provision for loan losses	268	180	1,030	343
Loans charged off	(1,970)	(2,102)	(7,018)	(6,910)
Recoveries of loans previously charged off	1,779	1,860	6,112	6,605
Ending balance, Allowance	860	640	860	640
Real estate – construction and development
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance, Allowance	47,306	77,482	60,421	61,017
Provision for loan losses	2,925	(2,506)	(10,199)	13,911
Loans charged off	0	0	0	0
Recoveries of loans previously charged off	27	6	36	54
Ending balance, Allowance	50,258	74,982	50,258	74,982
Real estate – commercial and farmland
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance, Allowance	127,794	121,963	118,377	110,097
Provision for loan losses	2,002	(1,885)	11,317	9,900
Loans charged off	(692)	(58)	(692)	(571)
Recoveries of loans previously charged off	114	61	216	655
Ending balance, Allowance	129,218	120,081	129,218	120,081
Real estate – residential
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance, Allowance	67,788	63,848	61,661	65,356
Provision for loan losses	113	672	6,485	(897)
Loans charged off	(257)	(23)	(590)	(49)
Recoveries of loans previously charged off	239	63	327	150
Ending balance, Allowance	$ 67,883	$ 64,560	$ 67,883	$ 64,560

X

- Definition

Amount excluding accrued interest, of allowance for credit loss on financing receivable. Excludes net investment in lease.

+ References

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Amount of increase in allowance for credit loss on financing receivable from recovery.

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Amount of writeoff of financing receivable, charged against allowance for credit loss.

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Amount of credit loss expense (reversal of expense) for financing receivable.

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