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Loans - Aging analysis of past due loans (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Loans and Allowance for Loan Losses
Non-Accruing	$ 169,640	$ 170,222
Total loans	32,667,310	32,388,489
30 days past due
Loans and Allowance for Loan Losses
Total loans	54,267	60,085
60 days past due
Loans and Allowance for Loan Losses
Total loans	22,587	18,276
90 days past due
Loans and Allowance for Loan Losses
Total loans	2,632	12,479
Total Past Due
Loans and Allowance for Loan Losses
Total loans	79,486	90,840
Current
Loans and Allowance for Loan Losses
Total loans	32,418,184	32,127,427
Non-acquired loans
Loans and Allowance for Loan Losses
Total loans	27,101,444	26,482,763
Construction and land development
Loans and Allowance for Loan Losses
Non-Accruing	1,562	1,433
Total loans	2,437,343	2,923,514
Construction and land development | 30 days past due
Loans and Allowance for Loan Losses
Total loans	45	624
Construction and land development | 60 days past due
Loans and Allowance for Loan Losses
Total loans	63
Construction and land development | Total Past Due
Loans and Allowance for Loan Losses
Total loans	108	624
Construction and land development | Current
Loans and Allowance for Loan Losses
Total loans	2,435,673	2,921,457
Commercial non-owner occupied
Loans and Allowance for Loan Losses
Non-Accruing	7,873	21,309
Total loans	9,112,474	8,571,634
Commercial non-owner occupied | 30 days past due
Loans and Allowance for Loan Losses
Total loans	4,175	2,194
Commercial non-owner occupied | 60 days past due
Loans and Allowance for Loan Losses
Total loans	7,895	123
Commercial non-owner occupied | 90 days past due
Loans and Allowance for Loan Losses
Total loans	70	1,378
Commercial non-owner occupied | Total Past Due
Loans and Allowance for Loan Losses
Total loans	12,140	3,695
Commercial non-owner occupied | Current
Loans and Allowance for Loan Losses
Total loans	9,092,461	8,546,630
Commercial owner occupied real estate loan
Loans and Allowance for Loan Losses
Non-Accruing	54,895	44,887
Total loans	5,511,855	5,497,671
Commercial owner occupied real estate loan | 30 days past due
Loans and Allowance for Loan Losses
Total loans	9,183	3,852
Commercial owner occupied real estate loan | 60 days past due
Loans and Allowance for Loan Losses
Total loans	1,252	1,141
Commercial owner occupied real estate loan | 90 days past due
Loans and Allowance for Loan Losses
Total loans	80	988
Commercial owner occupied real estate loan | Total Past Due
Loans and Allowance for Loan Losses
Total loans	10,515	5,981
Commercial owner occupied real estate loan | Current
Loans and Allowance for Loan Losses
Total loans	5,446,445	5,446,803
Consumer Owner Occupied Loans
Loans and Allowance for Loan Losses
Non-Accruing	25,528	25,271
Total loans	6,814,472	6,595,005
Consumer Owner Occupied Loans | 30 days past due
Loans and Allowance for Loan Losses
Total loans	6,682	7,903
Consumer Owner Occupied Loans | 60 days past due
Loans and Allowance for Loan Losses
Total loans	80	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	6,762	9,375
Consumer Owner Occupied Loans | Current
Loans and Allowance for Loan Losses
Total loans	6,782,182	6,560,359
Home equity loans
Loans and Allowance for Loan Losses
Non-Accruing	6,624	4,932
Total loans	1,408,594	1,398,445
Home equity loans | 30 days past due
Loans and Allowance for Loan Losses
Total loans	2,106	6,500
Home equity loans | 60 days past due
Loans and Allowance for Loan Losses
Total loans	1,226	1,326
Home equity loans | Total Past Due
Loans and Allowance for Loan Losses
Total loans	3,332	7,826
Home equity loans | Current
Loans and Allowance for Loan Losses
Total loans	1,398,638	1,385,687
Commercial and industrial
Loans and Allowance for Loan Losses
Non-Accruing	64,872	63,531
Total loans	5,544,131	5,504,539
Commercial and industrial | 30 days past due
Loans and Allowance for Loan Losses
Total loans	22,510	25,231
Commercial and industrial | 60 days past due
Loans and Allowance for Loan Losses
Total loans	7,243	7,194
Commercial and industrial | 90 days past due
Loans and Allowance for Loan Losses
Total loans	2,482	9,193
Commercial and industrial | Total Past Due
Loans and Allowance for Loan Losses
Total loans	32,235	41,618
Commercial and industrial | Current
Loans and Allowance for Loan Losses
Total loans	5,447,024	5,399,390
Other income producing property
Loans and Allowance for Loan Losses
Non-Accruing	2,732	3,202
Total loans	640,055	656,334
Other income producing property | 30 days past due
Loans and Allowance for Loan Losses
Total loans	313	569
Other income producing property | 60 days past due
Loans and Allowance for Loan Losses
Total loans	52	570
Other income producing property | Total Past Due
Loans and Allowance for Loan Losses
Total loans	365	1,139
Other income producing property | Current
Loans and Allowance for Loan Losses
Total loans	636,958	651,993
Consumer loans
Loans and Allowance for Loan Losses
Non-Accruing	5,554	5,657
Total loans	1,196,895	1,233,650
Consumer loans | 30 days past due
Loans and Allowance for Loan Losses
Total loans	9,253	13,212
Consumer loans | 60 days past due
Loans and Allowance for Loan Losses
Total loans	4,776	7,370
Consumer loans | Total Past Due
Loans and Allowance for Loan Losses
Total loans	14,029	20,582
Consumer loans | Current
Loans and Allowance for Loan Losses
Total loans	1,177,312	1,207,411
Other loans
Loans and Allowance for Loan Losses
Total loans	1,491	7,697
Other loans | Current
Loans and Allowance for Loan Losses
Total loans	1,491	7,697
Commercial loans
Loans and Allowance for Loan Losses
Total loans	22,572,694	22,391,162
Commercial loans | Construction and land development
Loans and Allowance for Loan Losses
Total loans	1,813,458	2,207,965
Commercial loans | Commercial non-owner occupied
Loans and Allowance for Loan Losses
Total loans	9,112,474	8,571,634
Commercial loans | Commercial owner occupied real estate loan
Loans and Allowance for Loan Losses
Total loans	5,511,855	5,497,671
Commercial loans | Consumer Owner Occupied Loans
Loans and Allowance for Loan Losses
Total loans	59,013	57,443
Commercial loans | Commercial and industrial
Loans and Allowance for Loan Losses
Total loans	5,544,131	5,504,539
Commercial loans | Other income producing property
Loans and Allowance for Loan Losses
Total loans	530,272	544,213
Commercial loans | Other loans
Loans and Allowance for Loan Losses
Total loans	1,491	7,697
Consumer portfolio loans
Loans and Allowance for Loan Losses
Total loans	10,094,616	9,997,327
Consumer portfolio loans | 30 days past due
Loans and Allowance for Loan Losses
Total loans	22,343	31,019
Consumer portfolio loans | 60 days past due
Loans and Allowance for Loan Losses
Total loans	8,268	12,500
Consumer portfolio loans | 90 days past due
Loans and Allowance for Loan Losses
Total loans	16,215	17,087
Consumer portfolio loans | Construction and land development
Loans and Allowance for Loan Losses
Total loans	623,885	715,549
Consumer portfolio loans | Construction and land development | 30 days past due
Loans and Allowance for Loan Losses
Total loans		111
Consumer portfolio loans | Construction and land development | 60 days past due
Loans and Allowance for Loan Losses
Total loans	110
Consumer portfolio loans | Construction and land development | 90 days past due
Loans and Allowance for Loan Losses
Total loans	24	76
Consumer portfolio loans | Consumer Owner Occupied Loans
Loans and Allowance for Loan Losses
Total loans	6,755,459	6,537,562
Consumer portfolio loans | Consumer Owner Occupied Loans | 30 days past due
Loans and Allowance for Loan Losses
Total loans	9,794	10,754
Consumer portfolio loans | Consumer Owner Occupied Loans | 60 days past due
Loans and Allowance for Loan Losses
Total loans	1,246	2,787
Consumer portfolio loans | Consumer Owner Occupied Loans | 90 days past due
Loans and Allowance for Loan Losses
Total loans	9,808	11,561
Consumer portfolio loans | Home equity loans
Loans and Allowance for Loan Losses
Total loans	1,408,594	1,398,445
Consumer portfolio loans | Home equity loans | 30 days past due
Loans and Allowance for Loan Losses
Total loans	2,796	6,656
Consumer portfolio loans | Home equity loans | 60 days past due
Loans and Allowance for Loan Losses
Total loans	1,820	1,842
Consumer portfolio loans | Home equity loans | 90 days past due
Loans and Allowance for Loan Losses
Total loans	2,358	1,309
Consumer portfolio loans | Other income producing property
Loans and Allowance for Loan Losses
Total loans	109,783	112,121
Consumer portfolio loans | Other income producing property | 30 days past due
Loans and Allowance for Loan Losses
Total loans	271	67
Consumer portfolio loans | Other income producing property | 60 days past due
Loans and Allowance for Loan Losses
Total loans	13
Consumer portfolio loans | Other income producing property | 90 days past due
Loans and Allowance for Loan Losses
Total loans	121	127
Consumer portfolio loans | Consumer loans
Loans and Allowance for Loan Losses
Total loans	1,196,895	1,233,650
Consumer portfolio loans | Consumer loans | 30 days past due
Loans and Allowance for Loan Losses
Total loans	9,482	13,431
Consumer portfolio loans | Consumer loans | 60 days past due
Loans and Allowance for Loan Losses
Total loans	5,079	7,871
Consumer portfolio loans | Consumer loans | 90 days past due
Loans and Allowance for Loan Losses
Total loans	$ 3,904	$ 4,014

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