Loans - Aging analysis of past due loans (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Loans and Allowance for Loan Losses
Non-Accruing	$ 181,971	$ 170,222
Total loans	33,548,192	32,388,489
30 days past due
Loans and Allowance for Loan Losses
Total loans	65,408	60,085
60 days past due
Loans and Allowance for Loan Losses
Total loans	22,230	18,276
90 days past due
Loans and Allowance for Loan Losses
Total loans	7,279	12,479
Total Past Due
Loans and Allowance for Loan Losses
Total loans	94,917	90,840
Current
Loans and Allowance for Loan Losses
Total loans	33,271,304	32,127,427
Non-acquired loans
Loans and Allowance for Loan Losses
Total loans	28,675,822	26,482,763
Construction and land development
Loans and Allowance for Loan Losses
Non-Accruing	1,182	1,433
Total loans	2,458,151	2,923,514
Construction and land development | 30 days past due
Loans and Allowance for Loan Losses
Total loans	652	624
Construction and land development | Total Past Due
Loans and Allowance for Loan Losses
Total loans	652	624
Construction and land development | Current
Loans and Allowance for Loan Losses
Total loans	2,456,317	2,921,457
Consumer Owner-Occupied Loans
Loans and Allowance for Loan Losses
Non-Accruing	36,287	25,271
Total loans	7,133,748	6,595,005
Consumer Owner-Occupied Loans | 30 days past due
Loans and Allowance for Loan Losses
Total loans	13,639	7,903
Consumer Owner-Occupied Loans | 60 days past due
Loans and Allowance for Loan Losses
Total loans	201	552
Consumer Owner-Occupied Loans | 90 days past due
Loans and Allowance for Loan Losses
Total loans		920
Consumer Owner-Occupied Loans | Total Past Due
Loans and Allowance for Loan Losses
Total loans	13,840	9,375
Consumer Owner-Occupied Loans | Current
Loans and Allowance for Loan Losses
Total loans	7,083,621	6,560,359
Home equity loans
Loans and Allowance for Loan Losses
Non-Accruing	8,625	4,932
Total loans	1,515,966	1,398,445
Home equity loans | 30 days past due
Loans and Allowance for Loan Losses
Total loans	3,083	6,500
Home equity loans | 60 days past due
Loans and Allowance for Loan Losses
Total loans	2,091	1,326
Home equity loans | Total Past Due
Loans and Allowance for Loan Losses
Total loans	5,174	7,826
Home equity loans | Current
Loans and Allowance for Loan Losses
Total loans	1,502,167	1,385,687
Commercial and industrial
Loans and Allowance for Loan Losses
Non-Accruing	66,676	63,531
Total loans	5,931,187	5,504,539
Commercial and industrial | 30 days past due
Loans and Allowance for Loan Losses
Total loans	33,834	25,231
Commercial and industrial | 60 days past due
Loans and Allowance for Loan Losses
Total loans	12,392	7,194
Commercial and industrial | 90 days past due
Loans and Allowance for Loan Losses
Total loans	4,378	9,193
Commercial and industrial | Total Past Due
Loans and Allowance for Loan Losses
Total loans	50,604	41,618
Commercial and industrial | Current
Loans and Allowance for Loan Losses
Total loans	5,813,907	5,399,390
Other income producing property
Loans and Allowance for Loan Losses
Non-Accruing	3,299	3,202
Total loans	610,286	656,334
Other income producing property | 30 days past due
Loans and Allowance for Loan Losses
Total loans	847	569
Other income producing property | 60 days past due
Loans and Allowance for Loan Losses
Total loans	149	570
Other income producing property | Total Past Due
Loans and Allowance for Loan Losses
Total loans	996	1,139
Other income producing property | Current
Loans and Allowance for Loan Losses
Total loans	605,991	651,993
Consumer loans
Loans and Allowance for Loan Losses
Non-Accruing	5,510	5,657
Total loans	1,106,382	1,233,650
Consumer loans | 30 days past due
Loans and Allowance for Loan Losses
Total loans	9,226	13,212
Consumer loans | 60 days past due
Loans and Allowance for Loan Losses
Total loans	4,804	7,370
Consumer loans | Total Past Due
Loans and Allowance for Loan Losses
Total loans	14,030	20,582
Consumer loans | Current
Loans and Allowance for Loan Losses
Total loans	1,086,842	1,207,411
Other loans
Loans and Allowance for Loan Losses
Total loans	1,333	7,697
Other loans | Current
Loans and Allowance for Loan Losses
Total loans	1,333	7,697
Commercial loans
Loans and Allowance for Loan Losses
Total loans	23,323,367	22,391,162
Commercial loans | Construction and land development
Loans and Allowance for Loan Losses
Total loans	2,028,387	2,207,965
Commercial loans | Commercial non-owner occupied
Loans and Allowance for Loan Losses
Non-Accruing	18,691	21,309
Total loans	9,246,423	8,571,634
Commercial loans | Commercial non-owner occupied | 30 days past due
Loans and Allowance for Loan Losses
Total loans	1,205	2,194
Commercial loans | Commercial non-owner occupied | 60 days past due
Loans and Allowance for Loan Losses
Total loans	270	123
Commercial loans | Commercial non-owner occupied | 90 days past due
Loans and Allowance for Loan Losses
Total loans	2,711	1,378
Commercial loans | Commercial non-owner occupied | Total Past Due
Loans and Allowance for Loan Losses
Total loans	4,186	3,695
Commercial loans | Commercial non-owner occupied | Current
Loans and Allowance for Loan Losses
Total loans	9,223,546	8,546,630
Commercial loans | Commercial owner-occupied real estate loan
Loans and Allowance for Loan Losses
Non-Accruing	41,701	44,887
Total loans	5,544,716	5,497,671
Commercial loans | Commercial owner-occupied real estate loan | 30 days past due
Loans and Allowance for Loan Losses
Total loans	2,922	3,852
Commercial loans | Commercial owner-occupied real estate loan | 60 days past due
Loans and Allowance for Loan Losses
Total loans	2,323	1,141
Commercial loans | Commercial owner-occupied real estate loan | 90 days past due
Loans and Allowance for Loan Losses
Total loans	190	988
Commercial loans | Commercial owner-occupied real estate loan | Total Past Due
Loans and Allowance for Loan Losses
Total loans	5,435	5,981
Commercial loans | Commercial owner-occupied real estate loan | Current
Loans and Allowance for Loan Losses
Total loans	5,497,580	5,446,803
Commercial loans | Consumer Owner-Occupied Loans
Loans and Allowance for Loan Losses
Total loans	65,205	57,443
Commercial loans | Commercial and industrial
Loans and Allowance for Loan Losses
Total loans	5,931,187	5,504,539
Commercial loans | Other income producing property
Loans and Allowance for Loan Losses
Total loans	506,116	544,213
Commercial loans | Other loans
Loans and Allowance for Loan Losses
Total loans	1,333	7,697
Consumer loans
Loans and Allowance for Loan Losses
Total loans	10,224,825	9,997,327
Consumer loans | 30 days past due
Loans and Allowance for Loan Losses
Total loans	30,948	31,019
Consumer loans | 60 days past due
Loans and Allowance for Loan Losses
Total loans	13,399	12,500
Consumer loans | 90 days past due
Loans and Allowance for Loan Losses
Total loans	21,353	17,087
Consumer loans | Construction and land development
Loans and Allowance for Loan Losses
Total loans	429,764	715,549
Consumer loans | Construction and land development | 30 days past due
Loans and Allowance for Loan Losses
Total loans		111
Consumer loans | Construction and land development | 90 days past due
Loans and Allowance for Loan Losses
Total loans	320	76
Consumer loans | Consumer Owner-Occupied Loans
Loans and Allowance for Loan Losses
Total loans	7,068,543	6,537,562
Consumer loans | Consumer Owner-Occupied Loans | 30 days past due
Loans and Allowance for Loan Losses
Total loans	16,840	10,754
Consumer loans | Consumer Owner-Occupied Loans | 60 days past due
Loans and Allowance for Loan Losses
Total loans	5,048	2,787
Consumer loans | Consumer Owner-Occupied Loans | 90 days past due
Loans and Allowance for Loan Losses
Total loans	14,955	11,561
Consumer loans | Home equity loans
Loans and Allowance for Loan Losses
Total loans	1,515,966	1,398,445
Consumer loans | Home equity loans | 30 days past due
Loans and Allowance for Loan Losses
Total loans	4,524	6,656
Consumer loans | Home equity loans | 60 days past due
Loans and Allowance for Loan Losses
Total loans	2,836	1,842
Consumer loans | Home equity loans | 90 days past due
Loans and Allowance for Loan Losses
Total loans	2,288	1,309
Consumer loans | Other income producing property
Loans and Allowance for Loan Losses
Total loans	104,170	112,121
Consumer loans | Other income producing property | 30 days past due
Loans and Allowance for Loan Losses
Total loans	100	67
Consumer loans | Other income producing property | 60 days past due
Loans and Allowance for Loan Losses
Total loans	154
Consumer loans | Other income producing property | 90 days past due
Loans and Allowance for Loan Losses
Total loans	130	127
Consumer loans | Consumer loans
Loans and Allowance for Loan Losses
Total loans	1,106,382	1,233,650
Consumer loans | Consumer loans | 30 days past due
Loans and Allowance for Loan Losses
Total loans	9,484	13,431
Consumer loans | Consumer loans | 60 days past due
Loans and Allowance for Loan Losses
Total loans	5,361	7,871
Consumer loans | Consumer loans | 90 days past due
Loans and Allowance for Loan Losses
Total loans	$ 3,660	$ 4,014