Loans - Aging analysis of past due loans (Details) - USD ($) $ in Thousands	Sep. 30, 2026	Dec. 31, 2025
Loans and Allowance for Loan Losses
Non-Accruing	$ 284,335	$ 297,155
Total loans	52,053,093	48,598,527
30 days past due
Loans and Allowance for Loan Losses
Total loans	87,480	73,810
60 days past due
Loans and Allowance for Loan Losses
Total loans	30,013	15,034
90 days past due
Loans and Allowance for Loan Losses
Total loans	10,629	4,941
Total Past Due
Loans and Allowance for Loan Losses
Total loans	128,122	93,785
Current
Loans and Allowance for Loan Losses
Total loans	51,640,636	48,207,587
Construction and land development
Loans and Allowance for Loan Losses
Non-Accruing	4,951	7,560
Total loans	2,917,132	2,548,360
Construction and land development \| 30 days past due
Loans and Allowance for Loan Losses
Total loans	3,498	3,018
Construction and land development \| 60 days past due
Loans and Allowance for Loan Losses
Total loans	17	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	3,515	3,629
Construction and land development \| Current
Loans and Allowance for Loan Losses
Total loans	2,908,666	2,537,171
Consumer owner-occupied
Loans and Allowance for Loan Losses
Non-Accruing	85,063	73,551
Total loans	9,370,164	8,618,434
Consumer owner-occupied \| 30 days past due
Loans and Allowance for Loan Losses
Total loans	16,558	16,301
Consumer owner-occupied \| 60 days past due
Loans and Allowance for Loan Losses
Total loans	553	901
Consumer owner-occupied \| 90 days past due
Loans and Allowance for Loan Losses
Total loans	409
Consumer owner-occupied \| Total Past Due
Loans and Allowance for Loan Losses
Total loans	17,520	17,202
Consumer owner-occupied \| Current
Loans and Allowance for Loan Losses
Total loans	9,267,581	8,527,681
Home equity loans
Loans and Allowance for Loan Losses
Non-Accruing	8,670	8,344
Total loans	1,973,241	1,831,789
Home equity loans \| 30 days past due
Loans and Allowance for Loan Losses
Total loans	4,155	2,739
Home equity loans \| 60 days past due
Loans and Allowance for Loan Losses
Total loans	1,756	1,226
Home equity loans \| 90 days past due
Loans and Allowance for Loan Losses
Total loans		1
Home equity loans \| Total Past Due
Loans and Allowance for Loan Losses
Total loans	5,911	3,966
Home equity loans \| Current
Loans and Allowance for Loan Losses
Total loans	1,958,660	1,819,479
Commercial and industrial
Loans and Allowance for Loan Losses
Non-Accruing	87,831	94,766
Total loans	9,804,607	9,181,408
Commercial and industrial \| 30 days past due
Loans and Allowance for Loan Losses
Total loans	45,714	24,890
Commercial and industrial \| 60 days past due
Loans and Allowance for Loan Losses
Total loans	7,635	5,860
Commercial and industrial \| 90 days past due
Loans and Allowance for Loan Losses
Total loans	8,532	2,913
Commercial and industrial \| Total Past Due
Loans and Allowance for Loan Losses
Total loans	61,881	33,663
Commercial and industrial \| Current
Loans and Allowance for Loan Losses
Total loans	9,654,895	9,052,979
Other income producing property
Loans and Allowance for Loan Losses
Non-Accruing	1,782	2,109
Total loans	1,183,334	1,232,153
Other income producing property \| 30 days past due
Loans and Allowance for Loan Losses
Total loans	1,043	1,582
Other income producing property \| 60 days past due
Loans and Allowance for Loan Losses
Total loans	211	827
Other income producing property \| 90 days past due
Loans and Allowance for Loan Losses
Total loans	340	615
Other income producing property \| Total Past Due
Loans and Allowance for Loan Losses
Total loans	1,594	3,024
Other income producing property \| Current
Loans and Allowance for Loan Losses
Total loans	1,179,958	1,227,020
Consumer
Loans and Allowance for Loan Losses
Non-Accruing	3,679	3,457
Total loans	949,640	955,266
Consumer \| 30 days past due
Loans and Allowance for Loan Losses
Total loans	2,409	2,002
Consumer \| 60 days past due
Loans and Allowance for Loan Losses
Total loans	1,018	793
Consumer \| Total Past Due
Loans and Allowance for Loan Losses
Total loans	3,427	2,795
Consumer \| Current
Loans and Allowance for Loan Losses
Total loans	942,534	949,014
Other loans
Loans and Allowance for Loan Losses
Total loans	6,639	2,366
Other loans \| Current
Loans and Allowance for Loan Losses
Total loans	6,639	2,366
Commercial loans
Loans and Allowance for Loan Losses
Total loans	39,427,243	36,858,811
Commercial loans \| Construction and land development
Loans and Allowance for Loan Losses
Total loans	2,546,615	2,205,518
Commercial loans \| Commercial non-owner-occupied
Loans and Allowance for Loan Losses
Non-Accruing	56,835	67,411
Total loans	17,896,525	16,651,760
Commercial loans \| Commercial non-owner-occupied \| 30 days past due
Loans and Allowance for Loan Losses
Total loans	3,243	8,457
Commercial loans \| Commercial non-owner-occupied \| 60 days past due
Loans and Allowance for Loan Losses
Total loans	14,553	304
Commercial loans \| Commercial non-owner-occupied \| 90 days past due
Loans and Allowance for Loan Losses
Total loans	2	408
Commercial loans \| Commercial non-owner-occupied \| Total Past Due
Loans and Allowance for Loan Losses
Total loans	17,798	9,169
Commercial loans \| Commercial non-owner-occupied \| Current
Loans and Allowance for Loan Losses
Total loans	17,821,892	16,575,180
Commercial loans \| Commercial owner-occupied real estate
Loans and Allowance for Loan Losses
Non-Accruing	35,524	39,957
Total loans	7,951,811	7,576,991
Commercial loans \| Commercial owner-occupied real estate \| 30 days past due
Loans and Allowance for Loan Losses
Total loans	10,860	14,821
Commercial loans \| Commercial owner-occupied real estate \| 60 days past due
Loans and Allowance for Loan Losses
Total loans	4,270	4,651
Commercial loans \| Commercial owner-occupied real estate \| 90 days past due
Loans and Allowance for Loan Losses
Total loans	1,346	865
Commercial loans \| Commercial owner-occupied real estate \| Total Past Due
Loans and Allowance for Loan Losses
Total loans	16,476	20,337
Commercial loans \| Commercial owner-occupied real estate \| Current
Loans and Allowance for Loan Losses
Total loans	7,899,811	7,516,697
Commercial loans \| Consumer owner-occupied
Loans and Allowance for Loan Losses
Total loans	135,968	121,394
Commercial loans \| Commercial and industrial
Loans and Allowance for Loan Losses
Total loans	9,804,607	9,181,408
Commercial loans \| Other income producing property
Loans and Allowance for Loan Losses
Total loans	1,085,078	1,119,374
Commercial loans \| Other loans
Loans and Allowance for Loan Losses
Total loans	$ 6,639	$ 2,366