LHFI and ACL, LHFI - Summary of Balance in Allowance for Loan Losses (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Individually Evaluated for Credit Loss	$ 12,403	$ 17,687
Individually Evaluated for Credit Loss	49,082	40,288
Collectively Evaluated for Credit Loss	126,964	102,527
Collectively Evaluated for Credit Loss	12,901,442	12,163,751
Total LHFI	12,950,524	12,204,039
Total	139,367	120,214	$ 99,457	$ 117,306
Commercial and Industrial Loans [Member]
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Individually Evaluated for Credit Loss	11,436	9,946
Individually Evaluated for Credit Loss	21,102	24,594
Collectively Evaluated for Credit Loss	15,202	13,194
Collectively Evaluated for Credit Loss	1,901,808	1,796,665
Total LHFI	1,922,910	1,821,259
Total	26,638	23,140	18,939
Consumer Loans [Member]
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Individually Evaluated for Credit Loss	0
Collectively Evaluated for Credit Loss	5,794	5,792
Collectively Evaluated for Credit Loss	165,734	170,230
Total LHFI	165,734	170,230
Total	5,794	5,792	4,774
State and Other Political Subdivision Loans [Member]
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Individually Evaluated for Credit Loss	0	0
Individually Evaluated for Credit Loss	0	0
Collectively Evaluated for Credit Loss	646	885
Collectively Evaluated for Credit Loss	1,088,466	1,223,863
Total LHFI	1,088,466	1,223,863
Total	646	885	2,708
Other Commercial Loans and Leases [Member]
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Individually Evaluated for Credit Loss	967
Individually Evaluated for Credit Loss	967
Collectively Evaluated for Credit Loss	6,105
Collectively Evaluated for Credit Loss	555,068
Total LHFI	556,035	471,930
Total	7,072	4,647
Other Commercial Loans [Member]
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Individually Evaluated for Credit Loss		0
Individually Evaluated for Credit Loss		0
Collectively Evaluated for Credit Loss		4,647
Collectively Evaluated for Credit Loss		471,930
Total LHFI		471,930
Total		4,647	5,348
Loans Secured by Real Estate [Member] | Construction, Land Development and Other Land [Member]
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Individually Evaluated for Credit Loss	0	121
Individually Evaluated for Credit Loss	2,020	1,558
Collectively Evaluated for Credit Loss	17,192	12,707
Collectively Evaluated for Credit Loss	640,866	689,058
Total LHFI	642,886	690,616
Total	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 Loss, Additional Information [Abstract]
Individually Evaluated for Credit Loss	946	482
Collectively Evaluated for Credit Loss	12,942	12,374
Collectively Evaluated for Credit Loss	621,451	590,308
Total LHFI	622,397	590,790
Total	12,942	12,374	10,310
Loans Secured by Real Estate [Member] | Secured by Nonfarm, Nonresidential Properties [Member]
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Individually Evaluated for Credit Loss	20,812	4,841
Collectively Evaluated for Credit Loss	24,043	19,488
Collectively Evaluated for Credit Loss	3,468,622	3,273,989
Total LHFI	3,489,434	3,278,830
Total	24,043	19,488	37,912
Loans Secured by Real Estate [Member] | Other Real Estate Secured [Member]
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Individually Evaluated for Credit Loss	0	0
Collectively Evaluated for Credit Loss	4,488	4,743
Collectively Evaluated for Credit Loss	1,312,551	742,538
Total LHFI	1,312,551	742,538
Total	4,488	4,743	4,713
Other Loans Secured by Real Estate [Member] | Other Construction [Member]
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Individually Evaluated for Credit Loss	0	7,620
Individually Evaluated for Credit Loss	0	7,620
Collectively Evaluated for Credit Loss	5,758	7,512
Collectively Evaluated for Credit Loss	867,793	1,021,306
Total LHFI	867,793	1,028,926
Total	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 Loss, Additional Information [Abstract]
Individually Evaluated for Credit Loss	3,235	1,193
Collectively Evaluated for Credit Loss	34,794	21,185
Collectively Evaluated for Credit Loss	2,279,083	2,183,864
Total LHFI	2,282,318	2,185,057
Total	$ 34,794	$ 21,185	$ 2,706