Summary of Significant Accounting Policies - Company's Income from Investments Held in Employee Deferred Compensation Trusts (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Accounting Policies [Abstract]
Dividend income	$ (2,315)	$ (2,556)	$ (2,610)	$ (2,848)
Realized and unrealized (gains) losses	67,937	(25,254)	98,233	(36,949)
(Income) loss from investments held in employee deferred compensation trusts	$ 65,622	$ (27,810)	$ 95,623	$ (39,797)