Information Regarding Reportable Business Segments (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 28, 2013	Sep. 28, 2013	Jun. 29, 2013	Mar. 30, 2013	Dec. 29, 2012	Sep. 29, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 28, 2013	Dec. 29, 2012	Dec. 31, 2011
Segment Reporting Information [Line Items]
External revenue from continuing operations	$ 691,975	$ 675,535	$ 674,390	$ 622,880	$ 685,093	$ 711,467	$ 730,160	$ 644,079	$ 2,664,780	$ 2,770,799	$ 2,628,374
Internal revenue									28,811	28,446	27,544
Investment income									1,475	1,563	1,705
Interest and debt expense from continuing operations									3,211	3,110	3,109
Depreciation and amortization from continuing operations									27,667	25,213	23,905
Operating income from continuing operations	39,741	46,614	48,427	41,808	47,800	53,056	57,247	42,636	176,590	200,739	180,827
Expenditures on long-lived assets from continuing operations									6,373	5,388	3,624
Goodwill	31,134				57,470				31,134	57,470	57,470
Capital lease additions									49,138	43,077	34,044
Total assets	970,696				879,421				970,696	879,421	808,449
Transportation Logistics
Segment Reporting Information [Line Items]
External revenue from continuing operations									2,628,225	2,734,938	2,594,031
Interest and debt expense from continuing operations									3,211	3,110	3,109
Depreciation and amortization from continuing operations									27,667	25,213	23,905
Operating income from continuing operations									151,188	167,626	153,936
Expenditures on long-lived assets from continuing operations									6,373	5,388	3,624
Goodwill	31,134				57,470				31,134	57,470	57,470
Capital lease additions									49,138	43,077	34,044
Total assets	754,904				708,233				754,904	708,233	647,002
Insurance
Segment Reporting Information [Line Items]
External revenue from continuing operations									36,555	35,861	34,343
Internal revenue									28,811	28,446	27,544
Investment income									1,475	1,563	1,705
Operating income from continuing operations									25,402	33,113	26,891
Total assets	$ 215,792				$ 171,188				$ 215,792	$ 171,188	$ 161,447