Pension and Postretirement Benefit Obligations - Components of Net Periodic Pension Cost (Detail) - Pension Plans [Member] - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 01, 2017	Oct. 02, 2016	Oct. 01, 2017	Oct. 02, 2016
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 150	$ 28	$ 450	$ 85
Interest cost	2,978	3,031	8,936	9,093
Expected return on plan assets	(3,399)	(3,458)	(10,197)	(10,373)
Recognized net actuarial loss	807	741	2,421	2,222
Amortization of prior service cost	7	7	21	21
Net periodic pension cost	$ 543	$ 349	$ 1,631	$ 1,048