Comprehensive Income and Accumulated Other Comprehensive Income (Loss) - Summary of Effects of Reclassifications from Accumulated Other Comprehensive Income (Loss) (Detail) $ in Thousands	6 Months Ended
	Jul. 02, 2017 USD ($)
Pension and Other Postretirement Benefit Plans
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Total net of tax	$ 774
Reclassification out of Accumulated Other Comprehensive Income [Member] | Actuarial losses [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Total before tax	1,278
Reclassification out of Accumulated Other Comprehensive Income [Member] | Prior service credit [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Total before tax	20
Reclassification out of Accumulated Other Comprehensive Income [Member] | Pension and Other Postretirement Benefit Plans
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Total before tax	1,258
Tax benefit	(484)
Total net of tax	$ (774)