LHFI and ACL, LHFI - Change in Allowance for Loan Losses (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance at beginning of period	$ 99,457	$ 117,306	$ 84,277
Loans charged-off	(11,332)	(10,275)	(11,475)
Recoveries	10,412	13,925	9,608
Net (charge-offs) recoveries	(920)	3,650	(1,867)
Provision for credit losses (PCL), LHFI	21,677	(21,499)	36,113
Balance at end of period	120,214	99,457	117,306
Commercial and Industrial Loans [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance at beginning of period	18,939	14,851
Loans charged-off	(671)	(4,391)
Recoveries	955	4,727
Provision for credit losses (PCL), LHFI	3,917	3,752
Balance at end of period	23,140	18,939	14,851
Consumer Loans [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance at beginning of period	4,774	5,838
Loans charged-off	(2,125)	(1,640)
Recoveries	1,563	1,665
Provision for credit losses (PCL), LHFI	1,580	(1,089)
Balance at end of period	5,792	4,774	5,838
State and Other Political Subdivision Loans [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance at beginning of period	2,708	3,190
Provision for credit losses (PCL), LHFI	(1,823)	(482)
Balance at end of period	885	2,708	3,190
Other Commercial Loans [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance at beginning of period	5,348	7,439
Loans charged-off	(7,341)	(3,750)
Recoveries	3,890	4,024
Provision for credit losses (PCL), LHFI	2,750	(2,365)
Balance at end of period	4,647	5,348	7,439
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	6,079	6,854
Loans charged-off	(226)	(39)
Recoveries	1,280	1,564
Provision for credit losses (PCL), LHFI	5,695	(2,300)
Balance at end of period	12,828	6,079	6,854
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	10,310	9,928
Loans charged-off	(225)	(109)
Recoveries	597	505
Provision for credit losses (PCL), LHFI	1,692	(14)
Balance at end of period	12,374	10,310	9,928
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	37,912	48,523
Loans charged-off	(306)	(169)
Recoveries	1,724	1,245
Provision for credit losses (PCL), LHFI	(19,842)	(11,687)
Balance at end of period	19,488	37,912	48,523
Loans Secured by Real Estate [Member] | Other Real Estate Secured [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance at beginning of period	4,713	7,382
Loans charged-off	(131)
Recoveries	14	20
Provision for credit losses (PCL), LHFI	147	(2,689)
Balance at end of period	4,743	4,713	7,382
Other Loans Secured by Real Estate [Member] | Other Construction [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance at beginning of period	5,968	8,158
Loans charged-off	(153)
Recoveries	222	47
Provision for credit losses (PCL), LHFI	9,095	(2,237)
Balance at end of period	15,132	5,968	8,158
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	2,706	5,143
Loans charged-off	(154)	(177)
Recoveries	167	128
Provision for credit losses (PCL), LHFI	18,466	(2,388)
Balance at end of period	$ 21,185	$ 2,706	5,143
ASU 2016-13 [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
LHFI			(3,039)
Allowance for loan losses, acquired loans transfer			815
Acquired loans ACL adjustment			$ 1,007