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Income Taxes (Tables) | 12 Months Ended
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Dec. 31, 2022
Income Tax Disclosure [Abstract] |
Summary of Components of Deferred Tax Assets and Liabilities | The table below summarizes significant components of deferred tax assets and liabilities:
| December 31,
| 2022 |  | 2021
Deferred tax assets |  |  |
Allowance for expected credit losses | $ | 2,923 |  |  | $ | 2,048 |
Accrued vacation and bonus | 37,776 |  |  | 40,608 |
Share-based compensation | 14,599 |  |  | 14,374 |
Notes receivable from employees | 11,927 |  |  | 12,911 |
State net operating loss carryforward | 537 |  |  | 1,125 |
Foreign net operating and capital loss carryforward | 11,852 |  |  | 8,357 |
Foreign tax credit carryforward | 4,199 |  |  | 3,536 |
Deferred compensation | 3,049 |  |  | 534 |
Operating lease assets | 64,465 |  |  | 64,482 |
Employee benefits obligations | 519 |  |  | 340 |
Other, net | 763 |  |  | 4,037 |
Total deferred tax assets | 152,609 |  |  | 152,352 |
Deferred tax liabilities |  |  |
Revenue recognition | (6,406) |  |  | (6,779) |
Operating lease liabilities | (51,995) |  |  | (52,087) |
Property and equipment, net | (12,956) |  |  | (14,766) |
Equity debt discount | — |  |  | (4,214) |
Goodwill and intangible assets | (204,634) |  |  | (206,105) |
Total deferred tax liabilities | (275,991) |  |  | (283,951) |
Foreign withholding tax | (1,921) |  |  | (1,537) |
Valuation allowance | (6,459) |  |  | (10,315) |
Net deferred tax liabilities | $ | (131,762) |  |  | $ | (143,451) |
Summary of Components of Income Before Income Tax Provision from Continuing Operations | The table below summarizes the components of income before income tax provision from continuing operations:
| Year Ended December 31,
| 2022 |  | 2021 |  | 2020
Domestic | $ | 165,553 |  |  | $ | 136,008 |  |  | $ | 122,800 |
Foreign | 132,196 |  |  | 161,939 |  |  | 139,646 |
Total | $ | 297,749 |  |  | $ | 297,947 |  |  | $ | 262,446 |
Summary of Components of Income Tax Provision from Continuing Operations | The table below summarizes the components of income tax provision from continuing operations:
| Year Ended December 31,
| 2022 |  | 2021 |  | 2020
Current |  |  |  |  |
Federal | $ | 24,227 |  |  | $ | 11,050 |  |  | $ | 22,164 |
State | 12,935 |  |  | 8,328 |  |  | 10,257 |
Foreign | 34,917 |  |  | 37,656 |  |  | 29,390 |
| 72,079 |  |  | 57,034 |  |  | 61,811 |
Deferred |  |  |  |  |
Federal | (2,717) |  |  | 10,766 |  |  | 3,936 |
State | (1,173) |  |  | 3,458 |  |  | 362 |
Foreign | (5,954) |  |  | (8,277) |  |  | (14,345) |
| (9,844) |  |  | 5,947 |  |  | (10,047) |
Income tax provision | $ | 62,235 |  |  | $ | 62,981 |  |  | $ | 51,764 |
Summary of Income Tax Provision from Continuing Operations Resulted in Effective Tax Rates | Our income tax provision from continuing operations resulted in effective tax rates that varied from the federal statutory income tax rate as summarized below:
| Year Ended December 31,
| 2022 |  | 2021 |  | 2020
Income tax expense at federal statutory rate | $ | 62,526 |  |  | $ | 62,569 |  |  | $ | 55,114 |
State income taxes, net of federal benefit | 10,486 |  |  | 8,643 |  |  | 10,567 |
Detriment from foreign tax rates | 5,811 |  |  | 4,375 |  |  | 1,175 |
Other expenses not deductible for tax purposes | 3,365 |  |  | 2,819 |  |  | 3,079 |
Adjustment to reserve for uncertain tax positions | (609) |  |  | 2,665 |  |  | (1,231) |
Share-based compensation | (9,372) |  |  | (6,167) |  |  | (6,560) |
Release of valuation allowance on foreign tax credits | (3,536) |  |  | — |  |  | (7,336) |
Income tax benefit related to the License Agreement, net | (2,034) |  |  | — |  |  | (3,899) |
Release of valuation allowance on Australian deferred tax asset | — |  |  | (5,063) |  |  | — |
U.S. foreign tax credits | (4,049) |  |  | (4,859) |  |  | — |
Valuation allowance on U.S. foreign tax credit carryforwards | — |  |  | 3,536 |  |  | — |
Deferred tax benefit of United Kingdom tax rate change | — |  |  | (3,167) |  |  | — |
Other adjustments, net | (353) |  |  | (2,370) |  |  | 855 |
Income tax provision | $ | 62,235 |  |  | $ | 62,981 |  |  | $ | 51,764 |

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