LOANS AND ALLOWANCE FOR CREDIT LOSSES - Allowance for Loan Losses (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period	$ 167,582	$ 199,422	$ 38,189
Initial allowance for PCD assets		9,432
Provision for credit losses	52,610	(35,081)	125,488
Loans charged off	(33,075)	(21,616)	(54,464)
Recoveries of loans previously charged off	18,560	15,425	11,548
Balance at end of period	205,677	167,582	199,422
Accounting Standards Update 2016-13
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period			78,661
Commercial, financial and agricultural
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period	26,829	7,359	4,567
Initial allowance for PCD assets		9,432
Provision for credit losses	21,307	12,071	8,963
Loans charged off	(18,635)	(7,760)	(10,647)
Recoveries of loans previously charged off	9,954	5,727	1,889
Balance at end of period	39,455	26,829	7,359
Commercial, financial and agricultural | Accounting Standards Update 2016-13
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period			2,587
Consumer
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period	6,097	4,076	3,784
Initial allowance for PCD assets		0
Provision for credit losses	3,360	7,330	(3,831)
Loans charged off	(4,926)	(6,248)	(5,642)
Recoveries of loans previously charged off	882	939	1,753
Balance at end of period	5,413	6,097	4,076
Consumer | Accounting Standards Update 2016-13
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period			8,012
Indirect automobile
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period	476	1,929	0
Initial allowance for PCD assets		0
Provision for credit losses	(1,082)	(1,944)	(235)
Loans charged off	(265)	(1,188)	(3,602)
Recoveries of loans previously charged off	1,045	1,679	1,657
Balance at end of period	174	476	1,929
Indirect automobile | Accounting Standards Update 2016-13
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period			4,109
Mortgage warehouse
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period	3,231	3,666	640
Initial allowance for PCD assets		0
Provision for credit losses	(1,113)	(435)	2,563
Loans charged off	0	0	0
Recoveries of loans previously charged off	0	0	0
Balance at end of period	2,118	3,231	3,666
Mortgage warehouse | Accounting Standards Update 2016-13
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period			463
Municipal
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period	401	791	484
Initial allowance for PCD assets		0
Provision for credit losses	(44)	(390)	399
Loans charged off	0	0	0
Recoveries of loans previously charged off	0	0	0
Balance at end of period	357	401	791
Municipal | Accounting Standards Update 2016-13
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period			(92)
Premium finance
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period	2,729	3,879	2,550
Initial allowance for PCD assets		0
Provision for credit losses	(1,317)	(2,352)	(198)
Loans charged off	(5,452)	(3,668)	(6,133)
Recoveries of loans previously charged off	5,065	4,870	3,189
Balance at end of period	1,025	2,729	3,879
Premium finance | Accounting Standards Update 2016-13
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period			4,471
Real estate – construction and development
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period	22,045	45,304	5,995
Initial allowance for PCD assets		0
Provision for credit losses	9,749	(23,532)	26,327
Loans charged off	(27)	(233)	(83)
Recoveries of loans previously charged off	892	506	817
Balance at end of period	32,659	22,045	45,304
Real estate – construction and development | Accounting Standards Update 2016-13
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period			12,248
Real estate – commercial and farmland
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period	77,831	88,894	9,666
Initial allowance for PCD assets		0
Provision for credit losses	(7,049)	(9,784)	78,210
Loans charged off	(3,574)	(1,852)	(27,504)
Recoveries of loans previously charged off	225	573	1,449
Balance at end of period	67,433	77,831	88,894
Real estate – commercial and farmland | Accounting Standards Update 2016-13
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period			27,073
Real estate – residential
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period	27,943	43,524	10,503
Initial allowance for PCD assets		0
Provision for credit losses	28,799	(16,045)	13,290
Loans charged off	(196)	(667)	(853)
Recoveries of loans previously charged off	497	1,131	794
Balance at end of period	$ 57,043	$ 27,943	43,524
Real estate – residential | Accounting Standards Update 2016-13
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period			$ 19,790