LHFI and ACL, LHFI - Summary of Balance in Allowance for Loan Losses (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Individually Evaluated for Credit Loss	$ 13,661	$ 12,403
Individually Evaluated for Credit Loss	37,140	49,082
Collectively Evaluated for Credit Loss	146,609	126,964
Collectively Evaluated for Credit Loss	13,052,802	12,901,442
Total LHFI	13,089,942	12,950,524
Total	160,270	139,367	$ 120,214	$ 99,457
Commercial and Industrial Loans [Member]
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Individually Evaluated for Credit Loss	10,518	11,436
Individually Evaluated for Credit Loss	22,503	21,102
Collectively Evaluated for Credit Loss	16,502	15,202
Collectively Evaluated for Credit Loss	1,818,219	1,901,808
Total LHFI	1,840,722	1,922,910
Total	27,020	26,638	23,140
Consumer Loans [Member]
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Individually Evaluated for Credit Loss	0
Collectively Evaluated for Credit Loss	5,141	5,794
Collectively Evaluated for Credit Loss	156,569	165,734
Total LHFI	156,569	165,734
Total	5,141	5,794	5,792
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	1,250	646
Collectively Evaluated for Credit Loss	969,836	1,088,466
Total LHFI	969,836	1,088,466
Total	1,250	646	885
Other Commercial Loans and Leases [Member]
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Individually Evaluated for Credit Loss	892	967
Individually Evaluated for Credit Loss	896	967
Collectively Evaluated for Credit Loss	5,355	6,105
Collectively Evaluated for Credit Loss	588,116	555,068
Total LHFI	589,012	556,035
Total	6,247	7,072	4,647
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	0
Individually Evaluated for Credit Loss	0	2,020
Collectively Evaluated for Credit Loss	6,452	17,192
Collectively Evaluated for Credit Loss	587,244	640,866
Total LHFI	587,244	642,886
Total	6,452	17,192	12,828
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	521	946
Collectively Evaluated for Credit Loss	11,347	12,942
Collectively Evaluated for Credit Loss	650,029	621,451
Total LHFI	650,550	622,397
Total	11,347	12,942	12,374
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	2,251
Individually Evaluated for Credit Loss	9,783	20,812
Collectively Evaluated for Credit Loss	35,645	24,043
Collectively Evaluated for Credit Loss	3,523,499	3,468,622
Total LHFI	3,533,282	3,489,434
Total	37,896	24,043	19,488
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	1,904	0
Collectively Evaluated for Credit Loss	19,491	4,488
Collectively Evaluated for Credit Loss	1,631,926	1,312,551
Total LHFI	1,633,830	1,312,551
Total	19,491	4,488	4,743
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	0
Individually Evaluated for Credit Loss	0	0
Collectively Evaluated for Credit Loss	13,297	5,758
Collectively Evaluated for Credit Loss	829,904	867,793
Total LHFI	829,904	867,793
Total	13,297	5,758	15,132
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	1,533	3,235
Collectively Evaluated for Credit Loss	32,129	34,794
Collectively Evaluated for Credit Loss	2,297,460	2,279,083
Total LHFI	2,298,993	2,282,318
Total	$ 32,129	$ 34,794	$ 21,185

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