Income Taxes (Schedule Of Reconciliation Of Unrecognized Tax Benefit) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 28, 2012	Dec. 30, 2011	Dec. 31, 2010
Income Taxes [Line Items]
Unrecognized tax Benefits, Ending Balance	$ 22,343	$ 15,733
Federal, State And Foreign Tax [Member]
Income Taxes [Line Items]
Unrecognized tax Benefits, Beginning Balance	25,984	25,473	38,262
Additions for tax positions related to the current year	11,700	7,438	4,091
Additions for tax positions related to prior year	(96)	706	4,600
Other reductions for tax positions related to prior years	(5,338)	(7,508)	(21,453)
Foreign exchange	0	(125)	(27)
Unrecognized tax Benefits, Ending Balance	32,250	25,984	25,473
Total unrecognized tax benefits that, if recognized, would impact the effective tax rate	32,250	25,984	25,473
Accrued Interest And Penalties [Member]
Income Taxes [Line Items]
Unrecognized tax Benefits, Beginning Balance	2,734	2,640	5,035
Additions for tax positions related to the current year	833	1,877	1,372
Additions for tax positions related to prior year		62	0
Other reductions for tax positions related to prior years	(634)	(1,831)	(3,767)
Foreign exchange	7	(14)
Unrecognized tax Benefits, Ending Balance	2,940	2,734	2,640
Total unrecognized tax benefits that, if recognized, would impact the effective tax rate	2,940	2,734	2,640
Unrecognized Income Tax Benefits [Member]
Income Taxes [Line Items]
Unrecognized tax Benefits, Beginning Balance	28,718	28,113	43,297
Additions for tax positions related to the current year	12,533	9,315	5,463
Additions for tax positions related to prior year	(96)	768	4,600
Other reductions for tax positions related to prior years	(5,972)	(9,339)	(25,220)
Foreign exchange	7	(139)	(27)
Unrecognized tax Benefits, Ending Balance	35,190	28,718	28,113
Total unrecognized tax benefits that, if recognized, would impact the effective tax rate	$ 35,190	$ 28,718	$ 28,113