Income Taxes (Narrative) (Details) - USD ($)	3 Months Ended	12 Months Ended
	Sep. 28, 2014	Dec. 27, 2015	Dec. 28, 2014	Dec. 29, 2013	Dec. 25, 2011	Dec. 26, 2010
Income Taxes [Line Items]
(Gross) windfall benefit on stock based compensation			$ 0	$ 1,500,000	$ 1,100,000	$ 3,500,000
Foreign tax credit carryforward		$ 58,900,000
Income tax holiday, income tax benefits (usd per share)		$ 0.02	$ 0.02
Net deferred tax assets		$ 7,981,000	$ 12,754,000
Valuation allowance		150,154,000	148,838,000
Deferred tax asset, net		27,448,000	29,762,000
Unremitted foreign earnings		4,400,000
Amount of unrecognized deferred tax liability, undistributed earnings of foreign subsidiaries		500,000
Deferred tax liability		8,235,000	6,177,000
Deferred tax liabilities, future repatriated foreign earnings		3,200,000
Deferred tax liabilities, undistributed foreign earnings		5,000,000
Accrued interest and penalties related to unrecognized tax benefits		3,100,000	4,300,000
Unrecognized tax benefit, if recognized, would affect the effective tax rate		12,000,000	16,400,000
Interest and penalties expense		(100,000)	(100,000)	100,000
Foreign Country
Income Taxes [Line Items]
Net operating loss carryforwards		21,200,000
Operating loss carryforwards, with no expiration		15,800,000
Operating loss carryforwards, with expiration		5,400,000
Federal
Income Taxes [Line Items]
Operating loss carryforwards		4,700,000
Valuation allowance		115,800,000
Deferred tax asset, net		104,500,000
IRC 382 Limitations
Income Taxes [Line Items]
Operating loss carryforwards		5,500,000
NETHERLANDS
Income Taxes [Line Items]
Change in valuation allowance	$ 2,400,000
Multiple Jurisdictions
Income Taxes [Line Items]
Change in valuation allowance				(900,000)
BELGIUM
Income Taxes [Line Items]
Change in valuation allowance				$ 1,000,000
GERMANY
Income Taxes [Line Items]
Change in valuation allowance	(14,000,000)
CANADA
Income Taxes [Line Items]
Change in valuation allowance	$ (300,000)
China
Income Taxes [Line Items]
Valuation allowance		400,000
Other Liabilities
Income Taxes [Line Items]
Accrued interest and penalties related to unrecognized tax benefits		10,500,000	$ 16,100,000
Minimum
Income Taxes [Line Items]
Expected change of gross unrecognized tax benefits, maximum		$ 3,600,000