LOANS AND ALLOWANCE FOR CREDIT LOSSES - Allowance for Loan Losses (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance, Allowance	$ 345,555	$ 320,023	$ 338,084	$ 307,100
Provision for loan losses	3,110	25,348	19,629	50,871
Loans charged off	(14,226)	(16,845)	(29,610)	(35,302)
Recoveries of loans previously charged off	7,128	7,692	13,464	13,549
Ending balance, Allowance	341,567	336,218	341,567	336,218
Commercial and industrial
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance, Allowance	82,621	63,804	87,242	64,053
Provision for loan losses	12,345	10,869	15,733	23,016
Loans charged off	(10,517)	(12,539)	(22,376)	(27,834)
Recoveries of loans previously charged off	4,536	4,408	8,386	7,307
Ending balance, Allowance	88,985	66,542	88,985	66,542
Consumer
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance, Allowance	6,145	3,939	7,327	3,952
Provision for loan losses	1,090	114	553	880
Loans charged off	(913)	(965)	(1,853)	(2,121)
Recoveries of loans previously charged off	251	391	546	768
Ending balance, Allowance	6,573	3,479	6,573	3,479
Mortgage warehouse
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance, Allowance	1,824	1,823	2,262	1,678
Provision for loan losses	456	319	18	464
Loans charged off	0	0	0	0
Recoveries of loans previously charged off	0	0	0	0
Ending balance, Allowance	2,280	2,142	2,280	2,142
Municipal
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance, Allowance	57	63	58	345
Provision for loan losses	1	(3)	0	(285)
Loans charged off	0	0	0	0
Recoveries of loans previously charged off	0	0	0	0
Ending balance, Allowance	58	60	58	60
Premium finance
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance, Allowance	682	616	736	602
Provision for loan losses	567	594	762	163
Loans charged off	(2,719)	(2,802)	(5,048)	(4,808)
Recoveries of loans previously charged off	2,253	2,294	4,333	4,745
Ending balance, Allowance	783	702	783	702
Real estate – construction and development
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance, Allowance	69,086	72,168	60,421	61,017
Provision for loan losses	(21,785)	5,269	(13,124)	16,417
Loans charged off	0	0	0	0
Recoveries of loans previously charged off	5	45	9	48
Ending balance, Allowance	47,306	77,482	47,306	77,482
Real estate – commercial and farmland
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance, Allowance	118,392	110,656	118,377	110,097
Provision for loan losses	9,335	11,311	9,315	11,785
Loans charged off	0	(513)	0	(513)
Recoveries of loans previously charged off	67	509	102	594
Ending balance, Allowance	127,794	121,963	127,794	121,963
Real estate – residential
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance, Allowance	66,748	66,954	61,661	65,356
Provision for loan losses	1,101	(3,125)	6,372	(1,569)
Loans charged off	(77)	(26)	(333)	(26)
Recoveries of loans previously charged off	16	45	88	87
Ending balance, Allowance	$ 67,788	$ 63,848	$ 67,788	$ 63,848

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

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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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