Loans - Summary of loans (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Jun. 30, 2022	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Dec. 31, 2020
Summary of Loans
Total loans	$ 28,836,303		$ 23,928,166
Allowance for Credit Losses on Loans	(324,398)	$ (319,708)	(301,807)	$ (314,144)	$ (350,401)	$ (457,309)
Loans, net	28,511,905		23,626,359
Deferred fees costs	45,900		15,900
Unamortized Discounts	79,500		68,000
Construction and land development
Summary of Loans
Total loans	2,550,552		2,029,216
Consumer Owner Occupied Loans
Summary of Loans
Total loans	4,729,790		3,638,364
Home equity loans
Summary of Loans
Total loans	1,247,330		1,168,594
Commercial and industrial
Summary of Loans
Total loans	4,977,737		3,761,133
Other income producing property
Summary of Loans
Total loans	676,846		696,804
Consumer loans
Summary of Loans
Total loans	1,259,846		904,657
Other loans
Summary of Loans
Total loans	3,516		23,583
Commercial loans
Summary of Loans
Total loans	20,639,107		17,476,982
Commercial loans | Construction and land development
Summary of Loans
Total loans	1,669,266		1,342,755
Commercial loans | Commercial non-owner occupied
Summary of Loans
Total loans	7,964,470		6,735,699
Commercial loans | Commercial non-owner occupied real estate.
Summary of Loans
Total loans	5,426,216		4,970,116
Commercial loans | Consumer Owner Occupied Loans
Summary of Loans
Total loans	30,839		30,043
Commercial loans | Commercial owner occupied real estate loan
Summary of Loans
Total loans	5,426,216		4,970,116
Commercial loans | Commercial and industrial
Summary of Loans
Total loans	4,977,737		3,761,133
Commercial loans | Other income producing property
Summary of Loans
Total loans	567,063		613,653
Commercial loans | Other loans
Summary of Loans
Total loans	3,516		23,583
Consumer portfolio loans
Summary of Loans
Total loans	8,197,196		6,451,184
Consumer portfolio loans | Construction and land development
Summary of Loans
Total loans	881,286		686,461
Consumer portfolio loans | Consumer Owner Occupied Loans
Summary of Loans
Total loans	4,698,951		3,608,321
Consumer portfolio loans | Home equity loans
Summary of Loans
Total loans	1,247,330		1,168,594
Consumer portfolio loans | Other income producing property
Summary of Loans
Total loans	109,783		83,151
Consumer portfolio loans | Consumer loans
Summary of Loans
Total loans	$ 1,259,846		$ 904,657