Accumulated Other Comprehensive Income - (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Oct. 02, 2015	Sep. 30, 2016	Oct. 02, 2015	Jul. 01, 2016	Dec. 31, 2015	Jul. 03, 2015	Dec. 31, 2014
Accumulated Other Comprehensive Income (Loss) [Rollward]
Accumulated other comprehensive loss	$ (75,353)	$ (82,205)	$ (75,353)	$ (82,205)	$ (76,625)	$ (80,705)	$ (82,288)	$ (82,237)
Activity
Other comprehensive income (loss) before reclassifications	341	(88)	1,347	1,317
Amounts reclassified from accumulated other comprehensive income	1,351	(27)	3,838	(835)
Net current period other comprehensive income (loss) before tax	1,692	(115)	5,185	482
Deferred taxes on current period activity	420	(198)	(167)	450
Net change in other comprehensive income	1,272	83	5,352	32
Pension and Post Employment Benefits [Member]
Accumulated Other Comprehensive Income (Loss) [Rollward]
Accumulated other comprehensive loss	(73,873)	(78,957)	(73,873)	(78,957)	(74,546)	(76,796)	(79,858)	(81,662)
Activity
Other comprehensive income (loss) before reclassifications	0	0	0	14
Amounts reclassified from accumulated other comprehensive income	1,015	1,396	3,045	4,186
Net current period other comprehensive income (loss) before tax	1,015	1,396	3,045	4,200
Deferred taxes on current period activity	342	495	122	1,495
Net change in other comprehensive income	673	901	2,923	2,705
Foreign Currency Translation [Member]
Accumulated Other Comprehensive Income (Loss) [Rollward]
Accumulated other comprehensive loss	(2,570)	(5,048)	(2,570)	(5,048)	(3,037)	(5,488)	(5,407)	(4,153)
Activity
Other comprehensive income (loss) before reclassifications	467	359	2,918	(895)
Amounts reclassified from accumulated other comprehensive income	0	0	0	0
Net current period other comprehensive income (loss) before tax	467	359	2,918	(895)
Deferred taxes on current period activity	0	0	0	0
Net change in other comprehensive income	467	359	2,918	(895)
Forward Contract | Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent [Member]
Accumulated Other Comprehensive Income (Loss) [Rollward]
Accumulated other comprehensive loss	1,090	1,800	1,090	1,800	$ 958	$ 1,579	$ 2,977	$ 3,578
Activity
Other comprehensive income (loss) before reclassifications	(126)	(447)	(1,571)	2,198
Amounts reclassified from accumulated other comprehensive income	336	(1,423)	793	(5,021)
Net current period other comprehensive income (loss) before tax	210	(1,870)	(778)	(2,823)
Deferred taxes on current period activity	78	(693)	(289)	(1,045)
Net change in other comprehensive income	$ 132	$ (1,177)	$ (489)	$ (1,778)