Loans - Aging analysis of past due loans (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Loans and Allowance for Loan Losses
Non-Accruing	$ 96,240	$ 75,418
Total loans	28,836,303	23,928,166
30 days past due
Loans and Allowance for Loan Losses
Total loans	71,829	68,136
60 days past due
Loans and Allowance for Loan Losses
Total loans	24,504	33,250
90 days past due
Loans and Allowance for Loan Losses
Total loans	3,788	4,863
Total Past Due
Loans and Allowance for Loan Losses
Total loans	100,121	106,249
Current
Loans and Allowance for Loan Losses
Total loans	28,639,942	23,746,499
Non-acquired loans
Loans and Allowance for Loan Losses
Total loans	20,926,566	16,050,775
Construction and land development
Loans and Allowance for Loan Losses
Non-Accruing	460	1,567
Total loans	2,550,552	2,029,216
Construction and land development | 30 days past due
Loans and Allowance for Loan Losses
Total loans	843	1,176
Construction and land development | 60 days past due
Loans and Allowance for Loan Losses
Total loans	464	59
Construction and land development | 90 days past due
Loans and Allowance for Loan Losses
Total loans	21	43
Construction and land development | Total Past Due
Loans and Allowance for Loan Losses
Total loans	1,328	1,278
Construction and land development | Current
Loans and Allowance for Loan Losses
Total loans	2,548,764	2,026,371
Consumer Owner Occupied Loans
Loans and Allowance for Loan Losses
Non-Accruing	17,186	18,183
Total loans	4,729,790	3,638,364
Consumer Owner Occupied Loans | 30 days past due
Loans and Allowance for Loan Losses
Total loans	4,740	4,046
Consumer Owner Occupied Loans | 60 days past due
Loans and Allowance for Loan Losses
Total loans	368	533
Consumer Owner Occupied Loans | Total Past Due
Loans and Allowance for Loan Losses
Total loans	5,108	4,579
Consumer Owner Occupied Loans | Current
Loans and Allowance for Loan Losses
Total loans	4,707,496	3,615,602
Home equity loans
Loans and Allowance for Loan Losses
Non-Accruing	6,322	6,255
Total loans	1,247,330	1,168,594
Home equity loans | 30 days past due
Loans and Allowance for Loan Losses
Total loans	3,104	2,565
Home equity loans | 60 days past due
Loans and Allowance for Loan Losses
Total loans	659	913
Home equity loans | Total Past Due
Loans and Allowance for Loan Losses
Total loans	3,763	3,478
Home equity loans | Current
Loans and Allowance for Loan Losses
Total loans	1,237,245	1,158,861
Commercial and industrial
Loans and Allowance for Loan Losses
Non-Accruing	13,839	7,441
Total loans	4,977,737	3,761,133
Commercial and industrial | 30 days past due
Loans and Allowance for Loan Losses
Total loans	29,527	50,451
Commercial and industrial | 60 days past due
Loans and Allowance for Loan Losses
Total loans	9,036	26,639
Commercial and industrial | 90 days past due
Loans and Allowance for Loan Losses
Total loans	3,211	3,991
Commercial and industrial | Total Past Due
Loans and Allowance for Loan Losses
Total loans	41,774	81,081
Commercial and industrial | Current
Loans and Allowance for Loan Losses
Total loans	4,922,124	3,672,611
Other income producing property
Loans and Allowance for Loan Losses
Non-Accruing	2,462	4,075
Total loans	676,846	696,804
Other income producing property | 30 days past due
Loans and Allowance for Loan Losses
Total loans	2,191	879
Other income producing property | 60 days past due
Loans and Allowance for Loan Losses
Total loans	1,110	424
Other income producing property | 90 days past due
Loans and Allowance for Loan Losses
Total loans	262	106
Other income producing property | Total Past Due
Loans and Allowance for Loan Losses
Total loans	3,563	1,409
Other income producing property | Current
Loans and Allowance for Loan Losses
Total loans	670,821	691,320
Consumer loans
Loans and Allowance for Loan Losses
Non-Accruing	3,743	3,456
Total loans	1,259,846	904,657
Consumer loans | 30 days past due
Loans and Allowance for Loan Losses
Total loans	18,488	2,672
Consumer loans | 60 days past due
Loans and Allowance for Loan Losses
Total loans	10,963	840
Consumer loans | 90 days past due
Loans and Allowance for Loan Losses
Total loans		1
Consumer loans | Total Past Due
Loans and Allowance for Loan Losses
Total loans	29,451	3,513
Consumer loans | Current
Loans and Allowance for Loan Losses
Total loans	1,226,652	897,688
Other loans
Loans and Allowance for Loan Losses
Total loans	3,516	23,583
Other loans | Current
Loans and Allowance for Loan Losses
Total loans	3,516	23,583
Commercial loans
Loans and Allowance for Loan Losses
Total loans	20,639,107	17,476,982
Commercial loans | Construction and land development
Loans and Allowance for Loan Losses
Total loans	1,669,266	1,342,755
Commercial loans | Commercial non-owner occupied
Loans and Allowance for Loan Losses
Non-Accruing	21,314	19,909
Total loans	7,964,470	6,735,699
Commercial loans | Commercial non-owner occupied | 30 days past due
Loans and Allowance for Loan Losses
Total loans	10,035	3,591
Commercial loans | Commercial non-owner occupied | 60 days past due
Loans and Allowance for Loan Losses
Total loans	586	2,110
Commercial loans | Commercial non-owner occupied | 90 days past due
Loans and Allowance for Loan Losses
Total loans		96
Commercial loans | Commercial non-owner occupied | Total Past Due
Loans and Allowance for Loan Losses
Total loans	10,621	5,797
Commercial loans | Commercial non-owner occupied | Current
Loans and Allowance for Loan Losses
Total loans	7,932,535	6,709,993
Commercial loans | Commercial owner occupied real estate loan
Loans and Allowance for Loan Losses
Non-Accruing	30,914	14,532
Total loans	5,426,216	4,970,116
Commercial loans | Commercial owner occupied real estate loan | 30 days past due
Loans and Allowance for Loan Losses
Total loans	2,901	2,756
Commercial loans | Commercial owner occupied real estate loan | 60 days past due
Loans and Allowance for Loan Losses
Total loans	1,318	1,732
Commercial loans | Commercial owner occupied real estate loan | 90 days past due
Loans and Allowance for Loan Losses
Total loans	294	626
Commercial loans | Commercial owner occupied real estate loan | Total Past Due
Loans and Allowance for Loan Losses
Total loans	4,513	5,114
Commercial loans | Commercial owner occupied real estate loan | Current
Loans and Allowance for Loan Losses
Total loans	5,390,789	4,950,470
Commercial loans | Consumer Owner Occupied Loans
Loans and Allowance for Loan Losses
Total loans	30,839	30,043
Commercial loans | Commercial and industrial
Loans and Allowance for Loan Losses
Total loans	4,977,737	3,761,133
Commercial loans | Other income producing property
Loans and Allowance for Loan Losses
Total loans	567,063	613,653
Commercial loans | Other loans
Loans and Allowance for Loan Losses
Total loans	3,516	23,583
Consumer portfolio loans
Loans and Allowance for Loan Losses
Total loans	8,197,196	6,451,184
Consumer portfolio loans | 30 days past due
Loans and Allowance for Loan Losses
Total loans	28,262	10,878
Consumer portfolio loans | 60 days past due
Loans and Allowance for Loan Losses
Total loans	14,637	4,157
Consumer portfolio loans | 90 days past due
Loans and Allowance for Loan Losses
Total loans	10,452	11,532
Consumer portfolio loans | Construction and land development
Loans and Allowance for Loan Losses
Total loans	881,286	686,461
Consumer portfolio loans | Construction and land development | 30 days past due
Loans and Allowance for Loan Losses
Total loans	137	24
Consumer portfolio loans | Construction and land development | 60 days past due
Loans and Allowance for Loan Losses
Total loans	300	12
Consumer portfolio loans | Construction and land development | 90 days past due
Loans and Allowance for Loan Losses
Total loans	157	104
Consumer portfolio loans | Consumer Owner Occupied Loans
Loans and Allowance for Loan Losses
Total loans	4,698,951	3,608,321
Consumer portfolio loans | Consumer Owner Occupied Loans | 30 days past due
Loans and Allowance for Loan Losses
Total loans	5,495	5,024
Consumer portfolio loans | Consumer Owner Occupied Loans | 60 days past due
Loans and Allowance for Loan Losses
Total loans	2,315	1,841
Consumer portfolio loans | Consumer Owner Occupied Loans | 90 days past due
Loans and Allowance for Loan Losses
Total loans	6,774	7,069
Consumer portfolio loans | Home equity loans
Loans and Allowance for Loan Losses
Total loans	1,247,330	1,168,594
Consumer portfolio loans | Home equity loans | 30 days past due
Loans and Allowance for Loan Losses
Total loans	3,620	2,909
Consumer portfolio loans | Home equity loans | 60 days past due
Loans and Allowance for Loan Losses
Total loans	855	942
Consumer portfolio loans | Home equity loans | 90 days past due
Loans and Allowance for Loan Losses
Total loans	1,307	2,712
Consumer portfolio loans | Other income producing property
Loans and Allowance for Loan Losses
Total loans	109,783	83,151
Consumer portfolio loans | Other income producing property | 30 days past due
Loans and Allowance for Loan Losses
Total loans	165	90
Consumer portfolio loans | Other income producing property | 60 days past due
Loans and Allowance for Loan Losses
Total loans		156
Consumer portfolio loans | Other income producing property | 90 days past due
Loans and Allowance for Loan Losses
Total loans	126	14
Consumer portfolio loans | Consumer loans
Loans and Allowance for Loan Losses
Total loans	1,259,846	904,657
Consumer portfolio loans | Consumer loans | 30 days past due
Loans and Allowance for Loan Losses
Total loans	18,845	2,831
Consumer portfolio loans | Consumer loans | 60 days past due
Loans and Allowance for Loan Losses
Total loans	11,167	1,206
Consumer portfolio loans | Consumer loans | 90 days past due
Loans and Allowance for Loan Losses
Total loans	$ 2,088	$ 1,633