Parent Company Financial Statements - Statements of Income (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Expenses
Professional services	$ 17,385	$ 15,805	$ 21,283
Other	21,144	26,238	6,313
Total noninterest expense	418,602	388,649	360,955
Income tax (benefit) expense	(63,309)	51,719	30,464
Net income	232,177	199,759	154,665
Parent
Income
Total income	130	15	0
Expenses
Professional services	4,937	899	7,393
Other	3,706	3,070	222
Total noninterest expense	8,643	3,969	7,615
Loss before income taxes and equity in undistributed income of subsidiaries	(8,513)	(3,954)	(7,615)
Income tax (benefit) expense	(1,773)	269	(11,344)
(Loss) income before equity in undistributed income of subsidiaries	(6,740)	(4,223)	3,729
Equity in undistributed income of subsidiaries	238,917	203,982	150,936
Net income	$ 232,177	$ 199,759	$ 154,665