Comprehensive Income and Accumulated Other Comprehensive Income (Loss) - Summary of Effects of Reclassifications from Accumulated Other Comprehensive Income (Loss) (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 02, 2016	Sep. 27, 2015	Oct. 02, 2016	Sep. 27, 2015
Amortization of pension and other postretirement benefit plan items:
Net of tax	$ 4,952	$ 877	$ 5,934	$ 2,568
Pension and Other Postretirement Benefit Plans [Member] | Reclassified from Accumulated Other Comprehensive Income (Loss) [Member]
Amortization of pension and other postretirement benefit plan items:
Settlement loss			7,385
Actuarial losses			2,327
Prior service credit			(62)
Total before tax			9,650
Tax benefit			(3,716)
Net of tax			$ 5,934