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Loans - Aging analysis of past due loans (Details) - USD ($) $ in Thousands	Mar. 31, 2026	Dec. 31, 2025
Loans and Allowance for Loan Losses
Non-Accruing	$ 293,160	$ 297,155
Total loans	49,496,783	48,598,527
30 days past due
Loans and Allowance for Loan Losses
Total loans	78,674	73,810
60 days past due
Loans and Allowance for Loan Losses
Total loans	13,923	15,034
90 days past due
Loans and Allowance for Loan Losses
Total loans	8,901	4,941
Total Past Due
Loans and Allowance for Loan Losses
Total loans	101,498	93,785
Current
Loans and Allowance for Loan Losses
Total loans	49,102,125	48,207,587
Construction and land development
Loans and Allowance for Loan Losses
Non-Accruing	7,371	7,560
Total loans	2,592,908	2,548,360
Construction and land development | 30 days past due
Loans and Allowance for Loan Losses
Total loans	4,530	3,018
Construction and land development | 60 days past due
Loans and Allowance for Loan Losses
Total loans		472
Construction and land development | 90 days past due
Loans and Allowance for Loan Losses
Total loans		139
Construction and land development | Total Past Due
Loans and Allowance for Loan Losses
Total loans	4,530	3,629
Construction and land development | Current
Loans and Allowance for Loan Losses
Total loans	2,581,007	2,537,171
Consumer owner-occupied
Loans and Allowance for Loan Losses
Non-Accruing	78,674	73,551
Total loans	8,717,832	8,618,434
Consumer owner-occupied | 30 days past due
Loans and Allowance for Loan Losses
Total loans	12,792	16,301
Consumer owner-occupied | 60 days past due
Loans and Allowance for Loan Losses
Total loans	201	901
Consumer owner-occupied | Total Past Due
Loans and Allowance for Loan Losses
Total loans	12,993	17,202
Consumer owner-occupied | Current
Loans and Allowance for Loan Losses
Total loans	8,626,165	8,527,681
Home equity loans
Loans and Allowance for Loan Losses
Non-Accruing	9,051	8,344
Total loans	1,856,065	1,831,789
Home equity loans | 30 days past due
Loans and Allowance for Loan Losses
Total loans	3,124	2,739
Home equity loans | 60 days past due
Loans and Allowance for Loan Losses
Total loans	2,025	1,226
Home equity loans | 90 days past due
Loans and Allowance for Loan Losses
Total loans	2	1
Home equity loans | Total Past Due
Loans and Allowance for Loan Losses
Total loans	5,151	3,966
Home equity loans | Current
Loans and Allowance for Loan Losses
Total loans	1,841,863	1,819,479
Commercial and industrial
Loans and Allowance for Loan Losses
Non-Accruing	94,810	94,766
Total loans	9,385,926	9,181,408
Commercial and industrial | 30 days past due
Loans and Allowance for Loan Losses
Total loans	23,652	24,890
Commercial and industrial | 60 days past due
Loans and Allowance for Loan Losses
Total loans	6,779	5,860
Commercial and industrial | 90 days past due
Loans and Allowance for Loan Losses
Total loans	6,818	2,913
Commercial and industrial | Total Past Due
Loans and Allowance for Loan Losses
Total loans	37,249	33,663
Commercial and industrial | Current
Loans and Allowance for Loan Losses
Total loans	9,253,867	9,052,979
Other income producing property
Loans and Allowance for Loan Losses
Non-Accruing	1,994	2,109
Total loans	1,201,200	1,232,153
Other income producing property | 30 days past due
Loans and Allowance for Loan Losses
Total loans	660	1,582
Other income producing property | 60 days past due
Loans and Allowance for Loan Losses
Total loans	414	827
Other income producing property | 90 days past due
Loans and Allowance for Loan Losses
Total loans		615
Other income producing property | Total Past Due
Loans and Allowance for Loan Losses
Total loans	1,074	3,024
Other income producing property | Current
Loans and Allowance for Loan Losses
Total loans	1,198,132	1,227,020
Consumer
Loans and Allowance for Loan Losses
Non-Accruing	3,649	3,457
Total loans	923,413	955,266
Consumer | 30 days past due
Loans and Allowance for Loan Losses
Total loans	1,728	2,002
Consumer | 60 days past due
Loans and Allowance for Loan Losses
Total loans	481	793
Consumer | Total Past Due
Loans and Allowance for Loan Losses
Total loans	2,209	2,795
Consumer | Current
Loans and Allowance for Loan Losses
Total loans	917,555	949,014
Other loans
Loans and Allowance for Loan Losses
Total loans	50,166	2,366
Other loans | Current
Loans and Allowance for Loan Losses
Total loans	50,166	2,366
Commercial loans
Loans and Allowance for Loan Losses
Total loans	37,649,135	36,858,811
Commercial loans | Construction and land development
Loans and Allowance for Loan Losses
Total loans	2,232,480	2,205,518
Commercial loans | Commercial non-owner-occupied
Loans and Allowance for Loan Losses
Non-Accruing	58,923	67,411
Total loans	17,097,738	16,651,760
Commercial loans | Commercial non-owner-occupied | 30 days past due
Loans and Allowance for Loan Losses
Total loans	23,530	8,457
Commercial loans | Commercial non-owner-occupied | 60 days past due
Loans and Allowance for Loan Losses
Total loans	2,794	304
Commercial loans | Commercial non-owner-occupied | 90 days past due
Loans and Allowance for Loan Losses
Total loans	202	408
Commercial loans | Commercial non-owner-occupied | Total Past Due
Loans and Allowance for Loan Losses
Total loans	26,526	9,169
Commercial loans | Commercial non-owner-occupied | Current
Loans and Allowance for Loan Losses
Total loans	17,012,289	16,575,180
Commercial loans | Commercial owner-occupied
Loans and Allowance for Loan Losses
Non-Accruing	38,688	39,957
Total loans	7,671,535	7,576,991
Commercial loans | Commercial owner-occupied | 30 days past due
Loans and Allowance for Loan Losses
Total loans	8,658	14,821
Commercial loans | Commercial owner-occupied | 60 days past due
Loans and Allowance for Loan Losses
Total loans	1,229	4,651
Commercial loans | Commercial owner-occupied | 90 days past due
Loans and Allowance for Loan Losses
Total loans	1,879	865
Commercial loans | Commercial owner-occupied | Total Past Due
Loans and Allowance for Loan Losses
Total loans	11,766	20,337
Commercial loans | Commercial owner-occupied | Current
Loans and Allowance for Loan Losses
Total loans	7,621,081	7,516,697
Commercial loans | Consumer owner-occupied
Loans and Allowance for Loan Losses
Total loans	117,442	121,394
Commercial loans | Commercial and industrial
Loans and Allowance for Loan Losses
Total loans	9,385,926	9,181,408
Commercial loans | Other income producing property
Loans and Allowance for Loan Losses
Total loans	1,093,848	1,119,374
Commercial loans | Other loans
Loans and Allowance for Loan Losses
Total loans	$ 50,166	$ 2,366

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