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Income Taxes - Deferred Portion of Tax Provision (Details) - USD ($) $ in Thousands | 12 Months Ended
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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)

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