Income Taxes - Deferred Portion of Tax Provision (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Tax Disclosure [Abstract]
Accrued expenses, deducted for tax when paid	$ (32,741)	$ (33,997)	$ (29,471)
Capitalized costs for books, deducted for tax	462	1,904	3,246
Depreciation	(2,286)	6,732	3,526
Unrealized gains from investments held in employee deferred compensation trusts	8,167	14,882	11,674
Other, net	5,000	(1,260)	2,153
Deferred portion of the tax provision (benefit)	$ (21,398)	$ (11,739)	$ (8,872)