Financial Statements of Guarantors (Details 3) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 30, 2013	Mar. 31, 2012
Net income	$ 9,021	$ 18,773
Foreign currency translation adjustment	(3,502)	8,889
Foreign currency translation adjustment, income tax benefit (expense)	486	(534)
Change in net actuarial loss and prior service credit	1,039	(320)
Change in net actuarial loss and prior service credit, income tax benefit (expense)	136
Comprehensive income	6,558	27,342
Combined Guarantor Subsidiaries
Net income	2,463	13,453
Comprehensive income	2,463	13,453
Combined Non-Guarantor Subsidiaries
Net income	13,624	15,210
Foreign currency translation adjustment	(4,277)	8,302
Change in net actuarial loss and prior service credit	1,039	(320)
Comprehensive income	10,386	23,192
The Company
Net income	9,021	18,773
Foreign currency translation adjustment	700	(271)
Equity in earnings of subsidiaries	(3,163)	8,840
Comprehensive income	6,558	27,342
Eliminations
Net income	(16,087)	(28,663)
Foreign currency translation adjustment	75	858
Equity in earnings of subsidiaries	3,163	(8,840)
Comprehensive income	$ (12,849)	$ (36,645)