Income Taxes - Reconciliation from Statutory Federal Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Reconciliation from statutory federal income taxes to the company's effective income taxes
Statutory federal income tax provision	$ 80,715	$ 96,773	$ 15,246
State taxes, net of federal income tax effect	27,986	34,001	4,757
Cash surrender life insurance	(2,238)	(1,890)	(1,163)
Tax-exempt interest	(5,215)	(6,803)	(4,073)
Non-deductible merger costs	0	0	703
LIHTC investments	(2,441)	(2,716)	(2,259)
Stock-based compensation shortfall (windfall)	(1,954)	(1,356)	407
Effect of the CARES Act	0	0	(2,636)
Section 162(m) of the Internal Revenue Code	2,956	2,015	968
Other	806	910	300
Total income tax provision	$ 100,615	$ 120,934	$ 12,250