Information Regarding Reportable Business Segments (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended	6 Months Ended
Jun. 28, 2014	Jun. 29, 2013	Jun. 28, 2014	Jun. 29, 2013	Dec. 28, 2013
Segment Reporting Information [Line Items]
External revenue from continuing operations	$ 814,443	$ 674,390	$ 1,502,640	$ 1,297,270
Investment income	332	371	695	745
Internal revenue	10,790	10,809	16,582	16,809
Operating income from continuing operations	58,572	48,427	103,586	90,235
Expenditures on long-lived assets from continuing operations	622	1,022	1,354	2,744
Goodwill	31,134	57,470	31,134	57,470	31,134
Transportation Logistics
Segment Reporting Information [Line Items]
External revenue from continuing operations	804,820	665,328	1,483,673	1,279,168
Operating income from continuing operations	53,218	40,933	92,202	75,821
Expenditures on long-lived assets from continuing operations	622	1,022	1,354	2,744
Goodwill	31,134	57,470	31,134	57,470
Insurance
Segment Reporting Information [Line Items]
External revenue from continuing operations	9,623	9,062	18,967	18,102
Investment income	332	371	695	745
Internal revenue	10,790	10,809	16,582	16,809
Operating income from continuing operations	$ 5,354	$ 7,494	$ 11,384	$ 14,414

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

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Amount of operating interest income, including, but not limited to, amortization and accretion of premiums and discounts on securities.

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The net result for the period of deducting operating expenses from operating revenues.

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The cash outflow associated with the acquisition of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale; includes cash outflows to pay for construction of self-constructed assets.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Investing Activities

-URI http://asc.fasb.org/extlink&oid=6516133

Reference 2: http://www.xbrl.org/2003/role/presentationRef

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-Name Accounting Standards Codification

-Topic 230

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-Paragraph 13

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Amount of revenue, fees and commissions earned from transactions between (a) a parent company and its subsidiaries; (b) subsidiaries of a common parent; (c) an entity and trusts for the benefit of employees, for example, but not limited to, pension and profit-sharing trusts that are managed by or under the trusteeship of the entity's management; (d) an entity and its principal, owners, management, or members of their immediate families; and (e) affiliates.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

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-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.1(e))

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Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

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-Article 5

Reference 3: http://www.xbrl.org/2003/role/presentationRef

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-Subparagraph (SX 210.6-07.1(c))

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Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

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