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Income Taxes - Summary of Differences in Taxes from Continuing Operations Computed at Statutory Rate (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Income Tax Disclosure [Abstract]
Provision at statutory rate of 21%	$ 42,510	$ 29,389	$ 81,995	$ 21,766
Tax-exempt income:
Tax-exempt interest	(4,605)	(3,413)	(9,091)	(6,406)
Section 291/265 interest disallowance	532	38	918	66
Company-owned life insurance income	(945)	(938)	(1,572)	(1,656)
Tax-exempt income	(5,018)	(4,313)	(9,745)	(7,996)
State income taxes	8,552	4,085	16,693	758
Interim period effective rate adjustment	993	(3,967)	(723)	3,073
Tax credit investments - federal	(2,526)	(1,292)	(5,051)	(2,561)
Officer compensation limitation	1,040	402	2,080	651
Non-deductible FDIC premiums	2,037	885	4,147	1,371
Other, net	(195)	(225)	(582)	(812)
Income tax expense (benefit)	$ 47,393	$ 24,964	$ 88,814	$ 16,250
Effective tax rate	23.40%	17.80%	22.80%	15.70%

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