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Information Regarding Reportable Business Segments (Detail) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 28, 2019 | Sep. 29, 2018 | Sep. 28, 2019 | Sep. 29, 2018 | Dec. 29, 2018
Segment Reporting Information [Line Items] |  |  |  |  |
External revenue | $ 1,011,658 | $ 1,202,081 | $ 3,089,698 | $ 3,432,793 |
Internal revenue | 9,611 | 7,496 | 36,978 | 30,413 |
Investment income | 1,315 | 1,002 | 3,736 | 2,754 |
Operating income | 70,638 | 87,068 | 232,385 | 245,647 |
Expenditures on long-lived assets | 5,975 | 3,204 | 15,199 | 7,325 |
Goodwill | 38,232 | 38,560 | 38,232 | 38,560 | $ 38,232
Transportation Logistics |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
External revenue | 997,552 | 1,188,737 | 3,047,329 | 3,394,298 |
Operating income | 64,848 | 80,878 | 200,767 | 227,176 |
Expenditures on long-lived assets | 5,975 | 3,204 | 15,199 | 7,325 |
Goodwill | 38,232 | 38,560 | 38,232 | 38,560 |
Insurance |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
External revenue | 14,106 | 13,344 | 42,369 | 38,495 |
Internal revenue | 9,611 | 7,496 | 36,978 | 30,413 |
Investment income | 1,315 | 1,002 | 3,736 | 2,754 |
Operating income | $ 5,790 | $ 6,190 | $ 31,618 | $ 18,471 |

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