Loans - Summary of Loans and Leases (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Summary of loans
Gross loans	$ 12,358,017	$ 11,585,458
Unearned income	(6,787)	(7,154)
Loans, net of unearned income	12,351,230	11,578,304
Commercial, financial, agricultural
Summary of loans
Gross loans	1,871,821	1,673,883
Loans, net of unearned income	1,871,821	1,673,883
Lease financing
Summary of loans
Gross loans	122,807	122,167
Loans, net of unearned income	116,020	115,013
Real Estate - Construction
Summary of loans
Gross loans	1,333,397	1,330,337
Loans, net of unearned income	1,333,397	1,330,337
Real Estate - Construction | Residential
Summary of loans
Gross loans	269,616	355,500
Real Estate - Construction | Commercial
Summary of loans
Gross loans	1,063,781	974,837
Real Estate - 1-4 Family Mortgage
Summary of loans
Gross loans	3,439,919	3,216,263
Loans, net of unearned income	3,439,919	3,216,263
Real Estate - 1-4 Family Mortgage | Primary
Summary of loans
Gross loans	2,422,482	2,222,856
Real Estate - 1-4 Family Mortgage | Home equity
Summary of loans
Gross loans	522,688	501,906
Real Estate - 1-4 Family Mortgage | Rental/investment
Summary of loans
Gross loans	373,755	334,382
Real Estate - 1-4 Family Mortgage | Land development
Summary of loans
Gross loans	120,994	157,119
Real Estate - 1-4 Family Mortgage | Land development
Summary of loans
Gross loans	120,994	157,119
Real Estate  - Commercial Mortgage
Summary of loans
Gross loans	5,486,550	5,118,063
Loans, net of unearned income	5,486,550	5,118,063
Real Estate  - Commercial Mortgage | Owner-occupied
Summary of loans
Gross loans	1,648,961	1,539,296
Real Estate  - Commercial Mortgage | Non-owner occupied
Summary of loans
Gross loans	3,733,174	3,452,910
Real Estate  - Commercial Mortgage | Land development
Summary of loans
Gross loans	104,415	125,857
Installment loans to individuals
Summary of loans
Gross loans	103,523	124,745
Loans, net of unearned income	$ 103,523	$ 124,745