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Income Taxes (Tables) | 12 Months Ended
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Dec. 31, 2020
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,
| 2020 |  | 2019
Deferred tax assets |  |  |
Allowance for expected credit losses | $ | 14,676 |  |  | $ | 13,041 |
Accrued vacation and bonus | 30,694 |  |  | 27,438 |
Share-based compensation | 13,522 |  |  | 12,647 |
Notes receivable from employees | 13,333 |  |  | 12,187 |
State net operating loss carryforward | 2,090 |  |  | 2,066 |
Foreign net operating loss carryforward | 9,437 |  |  | 9,388 |
Federal tax credit and capital loss carryforward | — |  |  | 7,336 |
Deferred compensation | 240 |  |  | 2,117 |
Operating lease assets | 41,283 |  |  | 43,397 |
Employee benefits obligations | 2,339 |  |  | 1,191 |
Other, net | 3,701 |  |  | 1,898 |
Total deferred tax assets | 131,315 |  |  | 132,706 |
Deferred tax liabilities |  |  |
Revenue recognition | (8,351) |  |  | (6,732) |
Operating lease liabilities | (28,523) |  |  | (29,671) |
Property and equipment, net | (7,663) |  |  | (3,797) |
Equity debt discount | (6,623) |  |  | (8,890) |
Goodwill and intangible assets | (202,842) |  |  | (209,250) |
Total deferred tax liabilities | (254,002) |  |  | (258,340) |
Foreign withholding tax | (1,980) |  |  | (1,195) |
Valuation allowance | (13,300) |  |  | (19,865) |
Net deferred tax liabilities | $ | (137,967) |  |  | $ | (146,694) |
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,
| 2020 |  | 2019 |  | 2018
Domestic | $ | 122,800 |  |  | $ | 150,860 |  |  | $ | 96,543 |
Foreign | 139,646 |  |  | 137,590 |  |  | 111,249 |
Total | $ | 262,446 |  |  | $ | 288,450 |  |  | $ | 207,792 |
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,
| 2020 |  | 2019 |  | 2018
Current |  |  |  |  |
Federal | $ | 22,164 |  |  | $ | 30,651 |  |  | $ | 10,847 |
State | 10,257 |  |  | 7,702 |  |  | 4,447 |
Foreign | 29,390 |  |  | 37,083 |  |  | 21,056 |
| 61,811 |  |  | 75,436 |  |  | 36,350 |
Deferred |  |  |  |  |
Federal | 3,936 |  |  | (1,767) |  |  | 14,538 |
State | 362 |  |  | 785 |  |  | 503 |
Foreign | (14,345) |  |  | (2,730) |  |  | 5,790 |
| (10,047) |  |  | (3,712) |  |  | 20,831 |
Income tax provision | $ | 51,764 |  |  | $ | 71,724 |  |  | $ | 57,181 |
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,
| 2020 |  | 2019 |  | 2018
Income tax expense at federal statutory rate | $ | 55,114 |  |  | $ | 60,575 |  |  | $ | 43,636 |
State income taxes, net of federal benefit | 10,567 |  |  | 8,430 |  |  | 4,950 |
Detriment from foreign tax rates | 1,175 |  |  | 3,425 |  |  | 3,655 |
Other expenses not deductible for tax purposes | 3,079 |  |  | 4,362 |  |  | 3,543 |
Adjustment to reserve for uncertain tax positions | (1,231) |  |  | 2,504 |  |  | (132) |
Impact of 2017 U.S. tax reform | — |  |  | (1,088) |  |  | (656) |
Sale of Ringtail business | — |  |  | (2,097) |  |  | 3,798 |
Share-based compensation | (6,560) |  |  | (4,447) |  |  | (1,371) |
Release of valuation allowance on foreign tax credits | (7,336) |  |  | — |  |  | — |
Income tax benefit related to the License Agreement, net | (3,899) |  |  | — |  |  | — |
Other adjustments, net | 855 |  |  | 60 |  |  | (242) |
Income tax provision | $ | 51,764 |  |  | $ | 71,724 |  |  | $ | 57,181 |

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- Definition Tabular disclosure of the components of income tax expense attributable to continuing operations for each year presented including, but not limited to: current tax expense (benefit), deferred tax expense (benefit), investment tax credits, government grants, the benefits of operating loss carryforwards, tax expense that results from allocating certain tax benefits either directly to contributed capital or to reduce goodwill or other noncurrent intangible assets of an acquired entity, adjustments of a deferred tax liability or asset for enacted changes in tax laws or rates or a change in the tax status of the entity, and adjustments of the beginning-of-the-year balances of a valuation allowance because of a change in circumstances that causes a change in judgment about the realizability of the related deferred tax asset in future years. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32639-109319 + Details
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- Definition Tabular disclosure of the components of net deferred tax asset or liability recognized in an entity's statement of financial position, including the following: the total of all deferred tax liabilities, the total of all deferred tax assets, the total valuation allowance recognized for deferred tax assets. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32537-109319 + Details
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