Schedule of Net Periodic Pension and Postretirement Cost (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 04, 2015	Sep. 28, 2014	Oct. 04, 2015	Sep. 28, 2014
United States Pension Plans, Defined Benefit
Defined Benefit Plan Disclosure
Service cost	$ 616	$ 555	$ 1,847	$ 1,663
Interest cost	3,285	3,219	9,856	9,656
Expected return on plan assets	(3,629)	(3,126)	(10,888)	(9,375)
Amortization of prior service cost (benefit)	34	34	101	101
Actuarial (gain) loss			(3)	362
Total net periodic	306	682	913	2,407
Foreign Pension Plans, Defined Benefit
Defined Benefit Plan Disclosure
Service cost	259	206	768	705
Interest cost	357	431	1,101	1,446
Expected return on plan assets	(185)	(209)	(595)	(685)
Total net periodic	431	428	1,274	1,466
Postretirement Benefit Plans
Defined Benefit Plan Disclosure
Service cost	12	15	36	44
Interest cost	59	84	177	252
Amortization of prior service cost (benefit)	(150)	(150)	(449)	(449)
Actuarial (gain) loss			(19)	(247)
Total net periodic	$ (79)	$ (51)	$ (255)	$ (400)