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LHFI and ACL, LHFI - Loan Portfolio Held for Investment (Details) - USD ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Loan Portfolio [Abstract]
Total LHFI	$ 13,674,233	$ 13,089,942
Less ACL, LHFI	157,071	160,270	$ 139,367	$ 120,214
Net LHFI	13,517,162	12,929,672
Construction, Land Development and Other Land [Member] | Loans Secured by Real Estate [Member]
Loan Portfolio [Abstract]
Total LHFI	549,353	587,244
Other Secured by 1-4 Family Residential Properties [Member] | Loans Secured by Real Estate [Member]
Loan Portfolio [Abstract]
Total LHFI	704,514	650,550
Secured by 1-4 Family Residential Properties [Member] | Other Loans Secured by Real Estate [Member]
Loan Portfolio [Abstract]
Total LHFI	2,351,675	2,298,993
Other Real Estate Secured [Member] | Loans Secured by Real Estate [Member]
Loan Portfolio [Abstract]
Total LHFI	2,124,272	1,633,830
Other Construction [Member] | Other Loans Secured by Real Estate [Member]
Loan Portfolio [Abstract]
Total LHFI	595,238	829,904
Secured by Nonfarm, Nonresidential Properties [Member] | Loans Secured by Real Estate [Member]
Loan Portfolio [Abstract]
Total LHFI	3,304,523	3,533,282
Less ACL, LHFI	35,183	37,896	24,043
Commercial and Industrial Loans [Member]
Loan Portfolio [Abstract]
Total LHFI	1,999,464	1,840,722
Less ACL, LHFI	20,569	27,020	26,638
Consumer Loans [Member]
Loan Portfolio [Abstract]
Total LHFI	163,754	156,569
Less ACL, LHFI	5,843	5,141	5,794
State and Other Political Subdivision Loans [Member]
Loan Portfolio [Abstract]
Total LHFI	1,061,584	969,836
Less ACL, LHFI	865	1,250	646
Other Commercial Loans and Leases [Member]
Loan Portfolio [Abstract]
Total LHFI	819,856	589,012
Less ACL, LHFI	$ 8,009	$ 6,247	$ 7,072

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