LHFI and ACL, LHFI - Change in Allowance for Loan Losses (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance at beginning of period	$ 120,214	$ 99,457	$ 117,306
Loans charged-off	(17,515)	(11,332)	(10,275)
Recoveries	9,306	10,412	13,925
Net (charge-offs) recoveries	(8,209)	(920)	3,650
Provision for credit losses (PCL), LHFI	27,362	21,677	(21,499)
Balance at end of period	139,367	120,214	99,457
Commercial and Industrial Loans [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance at beginning of period	23,140	18,939
Loans charged-off	(2,161)	(671)
Recoveries	1,066	955
Provision for credit losses (PCL), LHFI	4,593	3,917
Balance at end of period	26,638	23,140	18,939
Consumer Loans [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance at beginning of period	5,792	4,774
Loans charged-off	(9,290)	(2,125)
Recoveries	5,192	1,563
Provision for credit losses (PCL), LHFI	4,100	1,580
Balance at end of period	5,794	5,792	4,774
State and Other Political Subdivision Loans [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance at beginning of period	885	2,708
Loans charged-off	0	0
Recoveries	0	0
Provision for credit losses (PCL), LHFI	(239)	(1,823)
Balance at end of period	646	885	2,708
Other Commercial Loans and Leases [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance at beginning of period	4,647
Loans charged-off	(314)
Recoveries	0
Provision for credit losses (PCL), LHFI	2,739
Balance at end of period	7,072	4,647
Other Commercial Loans [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance at beginning of period	4,647	5,348
Loans charged-off		(7,341)
Recoveries		3,890
Provision for credit losses (PCL), LHFI		2,750
Balance at end of period		4,647	5,348
Loans Secured by Real Estate [Member] | Construction, Land Development and Other Land [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance at beginning of period	12,828	6,079
Loans charged-off	(242)	(226)
Recoveries	142	1,280
Provision for credit losses (PCL), LHFI	4,464	5,695
Balance at end of period	17,192	12,828	6,079
Loans Secured by Real Estate [Member] | Other Secured by 1-4 Family Residential Properties [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance at beginning of period	12,374	10,310
Loans charged-off	(320)	(225)
Recoveries	439	597
Provision for credit losses (PCL), LHFI	449	1,692
Balance at end of period	12,942	12,374	10,310
Loans Secured by Real Estate [Member] | Secured by Nonfarm, Nonresidential Properties [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance at beginning of period	19,488	37,912
Loans charged-off	(278)	(306)
Recoveries	2,328	1,724
Provision for credit losses (PCL), LHFI	2,505	(19,842)
Balance at end of period	24,043	19,488	37,912
Loans Secured by Real Estate [Member] | Other Real Estate Secured [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance at beginning of period	4,743	4,713
Loans charged-off	0	(131)
Recoveries	28	14
Provision for credit losses (PCL), LHFI	(283)	147
Balance at end of period	4,488	4,743	4,713
Other Loans Secured by Real Estate [Member] | Other Construction [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance at beginning of period	15,132	5,968
Loans charged-off	(3,453)	(153)
Recoveries	73	222
Provision for credit losses (PCL), LHFI	(5,994)	9,095
Balance at end of period	5,758	15,132	5,968
Other Loans Secured by Real Estate [Member] | Secured by 1-4 Family Residential Properties [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance at beginning of period	21,185	2,706
Loans charged-off	(1,457)	(154)
Recoveries	38	167
Provision for credit losses (PCL), LHFI	15,028	18,466
Balance at end of period	$ 34,794	$ 21,185	$ 2,706