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Income Taxes (Tables) | 12 Months Ended
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Dec. 31, 2021
Income Tax Disclosure [Abstract] |
Provision (Benefit) for Income Taxes | The provision for income taxes for the years ended December 31, 2021, 2020 and 2019, consisted of the following (in thousands):
|  | Year Ended December 31,
|  | 2021 |  | 2020 |  | 2019
Current: |  |  |  |  |  |
Federal |  | $ | 137,862 |  |  | $ | 79,926 |  |  | $ | 107,699 |
State |  | 47,226 |  |  | 27,401 |  |  | 39,028 |
Foreign |  | 41,464 |  |  | 20,018 |  |  | 33,227 |
Deferred: |  |  |  |  |  |
Federal and state |  | (22,515) |  |  | (9,089) |  |  | (9,959) |
Foreign |  | 1,117 |  |  | (2,650) |  |  | 1,087 |
|  | $ | 205,154 |  |  | $ | 115,606 |  |  | $ | 171,082 |
Income Before Provision for Income Taxes | Income before the provision for income taxes for the years ended December 31, 2021, 2020 and 2019, consisted of the following (in thousands):
|  | Year Ended December 31,
|  | 2021 |  | 2020 |  | 2019
Domestic |  | $ | 676,445 |  |  | $ | 378,876 |  |  | $ | 545,695 |
Foreign |  | 127,335 |  |  | 43,006 |  |  | 79,820 |
|  | $ | 803,780 |  |  | $ | 421,882 |  |  | $ | 625,515 |
Difference of Income Taxes from Statutory Federal Income Tax Rates | The income taxes shown above varied from the statutory federal income tax rates for these periods as follows:
|  | Year Ended December 31,
|  | 2021 |  | 2020 |  | 2019
Federal U.S. income tax rate |  | 21.0 | % |  | 21.0 | % |  | 21.0 | %
State income taxes, net of federal tax benefit |  | 4.5 |  |  | 4.9 |  |  | 4.9 |
Permanent book/tax differences |  | (0.4) |  |  | 0.3 |  |  | 0.5 |
Compensation book/tax differences |  | 0.7 |  |  | 1.3 |  |  | 0.6 |
Non-U.S. income taxed at different rates, net of foreign tax credits |  | 1.9 |  |  | 1.7 |  |  | 2.1 |
Federal tax credits |  | (1.6) |  |  | (1.5) |  |  | (1.4) |
Tax impact of uncertain tax positions |  | 0.3 |  |  | 0.1 |  |  | 0.2 |
Other, net |  | (0.9) |  |  | (0.4) |  |  | (0.5) |
Effective tax rate |  | 25.5 | % |  | 27.4 | % |  | 27.4 | %
Deferred Portion of Tax Provision (Benefit) | The deferred portion of the tax (benefit) provision consisted of the following (in thousands):
|  | Year Ended December 31,
|  | 2021 |  | 2020 |  | 2019
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 |
|  | $ | (21,398) |  |  | $ | (11,739) |  |  | $ | (8,872) |
Components of Deferred Income Tax Amounts | The components of the deferred income tax amounts at December 31, 2021 and 2020, were as follows (in thousands):
|  | December 31,
|  | 2021 |  | 2020
Deferred income tax assets |  |  |  |
Employee deferred compensation and other benefit obligations |  | $ | 155,064 |  |  | $ | 128,702 |
Deferred revenues, foreign royalties and management fees |  | 16,034 |  |  | — |
Deferred Payroll Taxes (CARES Act) |  | 13,355 |  |  | 27,086 |
Credits and net operating loss carryforwards |  | 24,811 |  |  | 30,651 |
Stock-based compensation |  | 3,843 |  |  | 3,637 |
Allowance for credit losses |  | 6,557 |  |  | 5,272 |
Workers’ compensation |  | 3,623 |  |  | 3,774 |
Operating lease liabilities |  | 52,614 |  |  | 59,249 |
Other |  | 18,565 |  |  | 13,361 |
Total deferred income tax assets |  | 294,466 |  |  | 271,732 |
Deferred income tax liabilities |  |  |  |
Amortization of intangible assets |  | (24,391) |  |  | (24,163) |
Property and equipment basis differences |  | (23,305) |  |  | (25,555) |
Unrealized gains from investments held in employee deferred compensation trusts |  | (34,001) |  |  | (26,224) |
Right-of-use assets |  | (43,986) |  |  | (49,833) |
Other |  | (10,549) |  |  | (8,922) |
Total deferred income tax liabilities |  | (136,232) |  |  | (134,697) |
Valuation allowance |  | (24,198) |  |  | (24,132) |
Total deferred income tax assets, net |  | $ | 134,036 |  |  | $ | 112,903 |
Reconciliation of Total Amounts of Gross Unrecognized Tax Benefits | The following table reconciles the total amounts of gross unrecognized tax benefits from January 1, 2019 to December 31, 2021 (in thousands):
|  | December 31,
|  | 2021 |  | 2020 |  | 2019
Balance at beginning of period |  | $ | 9,785 |  |  | $ | 9,354 |  |  | $ | 8,418 |
Gross increases—tax positions in prior years |  | 3 |  |  | 220 |  |  | — |
Gross decreases—tax positions in prior years |  | 0 |  |  | 0 |  |  | (760) |
Gross increases—tax positions in current year |  | 3,370 |  |  | 1,678 |  |  | 1,703 |
Settlements |  | — |  |  | — |  |  | (4) |
Lapse of statute of limitations |  | (1,894) |  |  | (1,467) |  |  | (3) |
Balance at end of period |  | $ | 11,264 |  |  | $ | 9,785 |  |  | $ | 9,354 |

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