Income Taxes (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 23, 2012	Sep. 25, 2011	Sep. 23, 2012	Sep. 25, 2011	Dec. 25, 2011
Income Taxes [Line Items]
Effective tax rate			0.70%	(570.20%)
Goodwill impairment	$ 0	$ 0	$ 64,437,000	$ 0
Restructuring related asset impairment			6,156,000	7,479,000
Tax effect of discrete items			(1,200,000)
Net deferred tax assets	11,300,000		11,300,000		11,700,000
Valuation allowance		48,000,000		48,000,000
Other Assets, Current	45,602,000		45,602,000		44,548,000	[1]
Current income tax receivable	9,300,000		9,300,000
Estimated tax payments	8,500,000		8,500,000
Income tax benefit			800,000
Other Liabilities, Current	28,727,000		28,727,000		32,867,000	[1]
Current deferred tax liability	4,600,000		4,600,000
Unrecognized tax benefit, if recognized, would affect the effective tax rate	11,000,000		11,000,000		13,200,000
Interest and penalties expense			700,000	(200,000)
Accrued interest and penalties related to unrecognized tax benefits	3,800,000		3,800,000		4,600,000
Expected change of gross unrecognized tax benefits, minimum	2,300,000		2,300,000
Expected change of gross unrecognized tax benefits, maximum	$ 3,700,000		$ 3,700,000
Maximum [Member] | Germany [Member]
Income Taxes [Line Items]
Open tax years currently under audit			2009
Maximum [Member] | Finland [Member]
Income Taxes [Line Items]
Open tax years currently under audit			2009
Maximum [Member] | India [Member]
Income Taxes [Line Items]
Open tax years currently under audit			2012
Minimum [Member] | Germany [Member]
Income Taxes [Line Items]
Open tax years currently under audit			2006
Minimum [Member] | Finland [Member]
Income Taxes [Line Items]
Open tax years currently under audit			2008
Minimum [Member] | India [Member]
Income Taxes [Line Items]
Open tax years currently under audit			2008

[1] Derived from the Company’s audited Consolidated Financial Statements at December 25, 2011.