Accumulated Other Comprehensive Income - (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 28, 2013	Jun. 29, 2012	Jun. 28, 2013	Jun. 29, 2012
Accumulated Other Comprehensive Income (Loss) [Rollward]
Beginning balance	$ (123,373)	$ (98,562)	$ (123,114)	$ (98,839)
Other comprehensive income (loss) before reclassifications	(590)	(152)	(2,486)	(693)
Amounts reclassified from accumulated other comprehensive income	1,447	1,215	3,084	2,033
Net current period other comprehensive income (loss)	857	1,063	598	1,340
Ending balance	(122,516)	(97,499)	(122,516)	(97,499)
Pension and Post Employment Benefits [Member]
Accumulated Other Comprehensive Income (Loss) [Rollward]
Beginning balance	(125,665)	(103,952)	(127,541)	(105,236)
Other comprehensive income (loss) before reclassifications	0	0	0	0
Amounts reclassified from accumulated other comprehensive income	1,876	1,284	3,752	2,568
Net current period other comprehensive income (loss)	1,876	1,284	3,752	2,568
Ending balance	(123,789)	(102,668)	(123,789)	(102,668)
Foreign Currency Translation [Member]
Accumulated Other Comprehensive Income (Loss) [Rollward]
Beginning balance	1,323	4,193	4,077	4,947
Other comprehensive income (loss) before reclassifications	(626)	(68)	(3,380)	(822)
Amounts reclassified from accumulated other comprehensive income	0	0	0	0
Net current period other comprehensive income (loss)	(626)	(68)	(3,380)	(822)
Ending balance	697	4,125	697	4,125
Foreign Currency [Member] | Gains and Losses On Cash Flow Hedges [Member]
Accumulated Other Comprehensive Income (Loss) [Rollward]
Beginning balance	969	1,197	253	1,399
Other comprehensive income (loss) before reclassifications	13	466	871	679
Amounts reclassified from accumulated other comprehensive income	(429)	(462)	(571)	(877)
Net current period other comprehensive income (loss)	(416)	4	300	(198)
Ending balance	553	1,201	553	1,201
Precious Metals [Member] | Gains and Losses On Cash Flow Hedges [Member]
Accumulated Other Comprehensive Income (Loss) [Rollward]
Beginning balance	0	0	97	51
Other comprehensive income (loss) before reclassifications	23	(550)	23	(550)
Amounts reclassified from accumulated other comprehensive income	0	393	(97)	342
Net current period other comprehensive income (loss)	23	(157)	(74)	(208)
Ending balance	$ 23	$ (157)	$ 23	$ (157)