Pension and Postretirement Benefit Obligations - Components of Net Periodic Pension Cost (Detail) - Pension Plans [Member] - USD ($) $ in Thousands	3 Months Ended
	Apr. 01, 2018	Apr. 02, 2017
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 1,412	$ 150
Interest cost	2,856	2,979
Expected return on plan assets	(3,852)	(3,399)
Recognized net actuarial loss	933	807
Amortization of prior service cost	6	7
Net periodic pension cost	$ 1,355	$ 544