Loans - Aging analysis of past due loans (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Loans and Allowance for Loan Losses
Non-Accruing	$ 170,222	$ 104,225
Total loans	32,388,489	30,177,862
30 days past due
Loans and Allowance for Loan Losses
Total loans	60,085	68,416
60 days past due
Loans and Allowance for Loan Losses
Total loans	18,276	31,607
90 days past due
Loans and Allowance for Loan Losses
Total loans	12,479	4,350
Total Past Due
Loans and Allowance for Loan Losses
Total loans	90,840	104,373
Current
Loans and Allowance for Loan Losses
Total loans	32,127,427	29,969,264
Non-acquired loans
Loans and Allowance for Loan Losses
Total loans	26,482,763	22,805,039
Construction and land development
Loans and Allowance for Loan Losses
Non-Accruing	1,433	827
Total loans	2,923,514	2,860,360
Construction and land development | 30 days past due
Loans and Allowance for Loan Losses
Total loans	624	2,146
Construction and land development | 60 days past due
Loans and Allowance for Loan Losses
Total loans		3,653
Construction and land development | Total Past Due
Loans and Allowance for Loan Losses
Total loans	624	5,799
Construction and land development | Current
Loans and Allowance for Loan Losses
Total loans	2,921,457	2,853,734
Commercial non-owner occupied
Loans and Allowance for Loan Losses
Non-Accruing	21,309	20,425
Total loans	8,571,634	8,072,959
Commercial non-owner occupied | 30 days past due
Loans and Allowance for Loan Losses
Total loans	2,194	1,158
Commercial non-owner occupied | 60 days past due
Loans and Allowance for Loan Losses
Total loans	123	978
Commercial non-owner occupied | 90 days past due
Loans and Allowance for Loan Losses
Total loans	1,378	77
Commercial non-owner occupied | Total Past Due
Loans and Allowance for Loan Losses
Total loans	3,695	2,213
Commercial non-owner occupied | Current
Loans and Allowance for Loan Losses
Total loans	8,546,630	8,050,321
Commercial owner occupied real estate loan
Loans and Allowance for Loan Losses
Non-Accruing	44,887	35,089
Total loans	5,497,671	5,460,193
Commercial owner occupied real estate loan | 30 days past due
Loans and Allowance for Loan Losses
Total loans	3,852	10,748
Commercial owner occupied real estate loan | 60 days past due
Loans and Allowance for Loan Losses
Total loans	1,141	2,059
Commercial owner occupied real estate loan | 90 days past due
Loans and Allowance for Loan Losses
Total loans	988	2,231
Commercial owner occupied real estate loan | Total Past Due
Loans and Allowance for Loan Losses
Total loans	5,981	15,038
Commercial owner occupied real estate loan | Current
Loans and Allowance for Loan Losses
Total loans	5,446,803	5,410,066
Consumer Owner Occupied Loans
Loans and Allowance for Loan Losses
Non-Accruing	25,271	17,307
Total loans	6,595,005	5,162,042
Consumer Owner Occupied Loans | 30 days past due
Loans and Allowance for Loan Losses
Total loans	7,903	6,001
Consumer Owner Occupied Loans | 60 days past due
Loans and Allowance for Loan Losses
Total loans	552	744
Consumer Owner Occupied Loans | 90 days past due
Loans and Allowance for Loan Losses
Total loans	920	40
Consumer Owner Occupied Loans | Total Past Due
Loans and Allowance for Loan Losses
Total loans	9,375	6,785
Consumer Owner Occupied Loans | Current
Loans and Allowance for Loan Losses
Total loans	6,560,359	5,137,950
Home equity loans
Loans and Allowance for Loan Losses
Non-Accruing	4,932	6,316
Total loans	1,398,445	1,313,168
Home equity loans | 30 days past due
Loans and Allowance for Loan Losses
Total loans	6,500	2,527
Home equity loans | 60 days past due
Loans and Allowance for Loan Losses
Total loans	1,326	361
Home equity loans | Total Past Due
Loans and Allowance for Loan Losses
Total loans	7,826	2,888
Home equity loans | Current
Loans and Allowance for Loan Losses
Total loans	1,385,687	1,303,964
Commercial and industrial
Loans and Allowance for Loan Losses
Non-Accruing	63,531	17,129
Total loans	5,504,539	5,313,483
Commercial and industrial | 30 days past due
Loans and Allowance for Loan Losses
Total loans	25,231	24,500
Commercial and industrial | 60 days past due
Loans and Allowance for Loan Losses
Total loans	7,194	11,677
Commercial and industrial | 90 days past due
Loans and Allowance for Loan Losses
Total loans	9,193	1,704
Commercial and industrial | Total Past Due
Loans and Allowance for Loan Losses
Total loans	41,618	37,881
Commercial and industrial | Current
Loans and Allowance for Loan Losses
Total loans	5,399,390	5,258,473
Other income producing property
Loans and Allowance for Loan Losses
Non-Accruing	3,202	2,734
Total loans	656,334	696,242
Other income producing property | 30 days past due
Loans and Allowance for Loan Losses
Total loans	569	1,623
Other income producing property | 60 days past due
Loans and Allowance for Loan Losses
Total loans	570	1,480
Other income producing property | 90 days past due
Loans and Allowance for Loan Losses
Total loans		298
Other income producing property | Total Past Due
Loans and Allowance for Loan Losses
Total loans	1,139	3,401
Other income producing property | Current
Loans and Allowance for Loan Losses
Total loans	651,993	690,107
Consumer loans
Loans and Allowance for Loan Losses
Non-Accruing	5,657	4,398
Total loans	1,233,650	1,278,426
Consumer loans | 30 days past due
Loans and Allowance for Loan Losses
Total loans	13,212	19,713
Consumer loans | 60 days past due
Loans and Allowance for Loan Losses
Total loans	7,370	10,655
Consumer loans | Total Past Due
Loans and Allowance for Loan Losses
Total loans	20,582	30,368
Consumer loans | Current
Loans and Allowance for Loan Losses
Total loans	1,207,411	1,243,660
Other loans
Loans and Allowance for Loan Losses
Total loans	7,697	20,989
Other loans | Current
Loans and Allowance for Loan Losses
Total loans	7,697	20,989
Commercial loans
Loans and Allowance for Loan Losses
Total loans	22,391,162	21,430,337
Commercial loans | Construction and land development
Loans and Allowance for Loan Losses
Total loans	2,207,965	1,956,300
Commercial loans | Commercial non-owner occupied
Loans and Allowance for Loan Losses
Total loans	8,571,634	8,072,959
Commercial loans | Commercial owner occupied real estate loan
Loans and Allowance for Loan Losses
Total loans	5,497,671	5,460,193
Commercial loans | Consumer Owner Occupied Loans
Loans and Allowance for Loan Losses
Total loans	57,443	30,741
Commercial loans | Commercial and industrial
Loans and Allowance for Loan Losses
Total loans	5,504,539	5,313,483
Commercial loans | Other income producing property
Loans and Allowance for Loan Losses
Total loans	544,213	575,672
Commercial loans | Other loans
Loans and Allowance for Loan Losses
Total loans	7,697	20,989
Consumer portfolio loans
Loans and Allowance for Loan Losses
Total loans	9,997,327	8,747,525
Consumer portfolio loans | 30 days past due
Loans and Allowance for Loan Losses
Total loans	31,019	30,013
Consumer portfolio loans | 60 days past due
Loans and Allowance for Loan Losses
Total loans	12,500	14,615
Consumer portfolio loans | 90 days past due
Loans and Allowance for Loan Losses
Total loans	17,087	10,472
Consumer portfolio loans | Construction and land development
Loans and Allowance for Loan Losses
Total loans	715,549	904,060
Consumer portfolio loans | Construction and land development | 30 days past due
Loans and Allowance for Loan Losses
Total loans	111	125
Consumer portfolio loans | Construction and land development | 90 days past due
Loans and Allowance for Loan Losses
Total loans	76	477
Consumer portfolio loans | Consumer Owner Occupied Loans
Loans and Allowance for Loan Losses
Total loans	6,537,562	5,131,301
Consumer portfolio loans | Consumer Owner Occupied Loans | 30 days past due
Loans and Allowance for Loan Losses
Total loans	10,754	7,215
Consumer portfolio loans | Consumer Owner Occupied Loans | 60 days past due
Loans and Allowance for Loan Losses
Total loans	2,787	3,063
Consumer portfolio loans | Consumer Owner Occupied Loans | 90 days past due
Loans and Allowance for Loan Losses
Total loans	11,561	5,874
Consumer portfolio loans | Home equity loans
Loans and Allowance for Loan Losses
Total loans	1,398,445	1,313,168
Consumer portfolio loans | Home equity loans | 30 days past due
Loans and Allowance for Loan Losses
Total loans	6,656	2,658
Consumer portfolio loans | Home equity loans | 60 days past due
Loans and Allowance for Loan Losses
Total loans	1,842	691
Consumer portfolio loans | Home equity loans | 90 days past due
Loans and Allowance for Loan Losses
Total loans	1,309	1,081
Consumer portfolio loans | Other income producing property
Loans and Allowance for Loan Losses
Total loans	112,121	120,570
Consumer portfolio loans | Other income producing property | 30 days past due
Loans and Allowance for Loan Losses
Total loans	67	62
Consumer portfolio loans | Other income producing property | 60 days past due
Loans and Allowance for Loan Losses
Total loans		23
Consumer portfolio loans | Other income producing property | 90 days past due
Loans and Allowance for Loan Losses
Total loans	127	121
Consumer portfolio loans | Consumer loans
Loans and Allowance for Loan Losses
Total loans	1,233,650	1,278,426
Consumer portfolio loans | Consumer loans | 30 days past due
Loans and Allowance for Loan Losses
Total loans	13,431	19,953
Consumer portfolio loans | Consumer loans | 60 days past due
Loans and Allowance for Loan Losses
Total loans	7,871	10,838
Consumer portfolio loans | Consumer loans | 90 days past due
Loans and Allowance for Loan Losses
Total loans	$ 4,014	$ 2,919