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Income Taxes (Tables) | 12 Months Ended
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Dec. 31, 2023
Income Tax Disclosure [Abstract] |
Schedule of Components of Income Tax Expense | Income tax expense (benefit) includes the following components:
|  |  | Federal |  |  | State |  |  | Foreign |  |  | Total |
| 2023 |  |  |  |  |  |  |  |  |  |  |  |
| Current |  | $ | 87,461 |  |  | $ | 24,481 |  |  | $ | 174,223 |  |  | $ | 286,165 |
| Deferred |  |  | (20,795 | ) |  |  | (2,121 | ) |  |  | — |  |  |  | (22,916 | )
|  |  | $ | 66,666 |  |  | $ | 22,360 |  |  | $ | 174,223 |  |  | $ | 263,249 |
| 2022 |  |  |  |  |  |  |  |  |  |  |  |
| Current |  | $ | 149,840 |  |  | $ | 63,140 |  |  | $ | 295,546 |  |  | $ | 508,526 |
| Deferred |  |  | (27,904 | ) |  |  | (5,336 | ) |  |  | — |  |  |  | (33,240 | )
|  |  | $ | 121,936 |  |  | $ | 57,804 |  |  | $ | 295,546 |  |  | $ | 475,286 |
| 2021 |  |  |  |  |  |  |  |  |  |  |  |
| Current |  | $ | 126,840 |  |  | $ | 54,484 |  |  | $ | 328,137 |  |  | $ | 509,461 |
| Deferred |  |  | (3,981 | ) |  |  | 291 |  |  |  | — |  |  |  | (3,690 | )
|  |  | $ | 122,859 |  |  | $ | 54,775 |  |  | $ | 328,137 |  |  | $ | 505,771 |
Schedule of U.S. and Foreign Components of Income Before Income Tax Expense/(Benefit) | The components of earnings before income taxes are as follows:
|  |  | 2023 |  |  | 2022 |  |  | 2021 |
| United States |  | $ | 512,682 |  |  | $ | 987,186 |  |  | $ | 823,009 |
| Foreign |  |  | 502,346 |  |  |  | 848,705 |  |  |  | 1,101,607 |
|  |  | $ | 1,015,028 |  |  | $ | 1,835,891 |  |  | $ | 1,924,616 |
Schedule of Effective Income Tax Rate Reconciliation | Income tax expense differs from amounts computed by applying the United States Federal income tax rate of 21% when compared to earnings before income taxes as a result of the following:
|  |  | 2023 |  |  | 2022 |  |  | 2021 |
| Computed “expected” tax expense |  | $ | 213,156 |  |  | $ | 385,537 |  |  | $ | 404,169 |
| Increase (decrease) in income taxes resulting from: |  |  |  |  |  |  |  |  |
| Effect of foreign taxes |  |  | 27,711 |  |  |  | 32,293 |  |  |  | 46,644 |
| State income taxes, net of Federal income tax benefit |  |  | 17,665 |  |  |  | 45,665 |  |  |  | 43,272 |
| Nondeductible executive compensation |  |  | 4,965 |  |  |  | 8,019 |  |  |  | 8,981 |
| Stock compensation expense, net |  |  | (1,321 | ) |  |  | 454 |  |  |  | (6,238 | )
| Other, net |  |  | 1,073 |  |  |  | 3,318 |  |  |  | 8,943 |
|  |  | $ | 263,249 |  |  | $ | 475,286 |  |  | $ | 505,771 |
Schedule of Deferred Tax Assets and Liabilities | The tax effects of temporary differences and tax credits that give rise to significant portions of deferred tax assets and deferred tax liabilities are as follows:
| Years ended December 31, |  | 2023 |  |  | 2022 |
| Deferred Tax Assets: |  |  |  |  |  |
| Deductible stock compensation expense, net |  | $ | 7,199 |  |  | $ | 9,707 |
| Operating lease liabilities |  |  | 75,659 |  |  |  | 72,506 |
| Capitalized R&D expenses |  |  | 39,723 |  |  |  | 23,246 |
| Accrued third party obligations, deductible for taxes upon economic performance |  |  | 10,878 |  |  |  | 9,601 |
| Excess of financial statement over tax depreciation |  |  | 12,532 |  |  |  | 10,280 |
| Foreign currency translation adjustments |  |  | 15,400 |  |  |  | 12,184 |
| Retained liability for cargo claims |  |  | 1,040 |  |  |  | 1,592 |
| Provision for credit losses on accounts receivable |  |  | 856 |  |  |  | 3,550 |
| Total gross deferred tax assets |  |  | 163,287 |  |  |  | 142,666 |
| Deferred Tax Liabilities: |  |  |  |  |  |
| Unremitted foreign earnings, net of related foreign tax credits |  |  | 28,275 |  |  |  | 36,542 |
| Operating lease assets |  |  | 71,322 |  |  |  | 68,675 |
| Total gross deferred tax liabilities |  |  | 99,597 |  |  |  | 105,217 |
| Net deferred tax assets |  | $ | 63,690 |  |  | $ | 37,449 |

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