Income Taxes - Components of Net Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Assets:
Deferred compensation expense	$ 51,064	$ 58,497
Allowance for credit losses and nonperforming assets	47,517	50,161
Lease liabilities	17,284	17,534
Investment securities	233,859	40,108
State income taxes	2,619	3,440
Total deferred income tax assets before valuation allowance	352,343	169,740
Valuation allowance	(983)	(1,082)
Total deferred income tax assets after valuation allowance	351,360	168,658
Liabilities:
Leases	(15,739)	(15,785)
Deferred income	(20,893)	(14,213)
Lease right-of-use assets	(16,763)	(17,132)
Intangible assets	(736)	(577)
Other	(34,910)	(24,779)
Total deferred income tax liabilities	(89,041)	(72,486)
Net deferred income tax assets	$ 262,319	$ 96,172