Accumulated Other Comprehensive Loss - Summary of Impact of Accumulated Other Comprehensive Income (Loss) on Income Statement (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 03, 2016	Jun. 28, 2015	Jul. 03, 2016	Jun. 28, 2015
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Cost of sales	$ 520,677	$ 377,366	$ 902,235	$ 646,246
Selling, delivery and administrative expenses	264,971	199,001	496,468	366,472
Subtotal pre-tax	(27,962)	(46,483)	(13,851)	(50,949)
Income tax expense	10,638	17,562	5,560	19,075
Total after tax effect	(15,652)	(26,934)	(5,611)	(29,158)
Reclassification out of Accumulated Other Comprehensive Income [Member] | Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member]
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Cost of sales	37	71	74	136
Selling, delivery and administrative expenses	458	611	916	1,228
Subtotal pre-tax	495	682	990	1,364
Income tax expense	190	263	382	527
Total after tax effect	305	419	608	837
Net Pension Activity [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member] | Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member]
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Cost of sales	75	88	150	169
Selling, delivery and administrative expenses	672	716	1,345	1,440
Subtotal pre-tax	747	804	1,495	1,609
Income tax expense	287	310	576	621
Total after tax effect	460	494	919	988
Net Postretirement Benefits Activity [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member] | Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member]
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Cost of sales	(38)	(17)	(76)	(33)
Selling, delivery and administrative expenses	(214)	(105)	(429)	(212)
Subtotal pre-tax	(252)	(122)	(505)	(245)
Income tax expense	(97)	(47)	(194)	(94)
Total after tax effect	$ (155)	$ (75)	$ (311)	$ (151)