Income Taxes (Reconciliation Of The Beginning And Ending Amount Of Unrecognized Tax Benefits) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 28, 2014	Dec. 29, 2013	Dec. 30, 2012
Income Tax Disclosure [Abstract]
Gross unrecognized tax benefits at beginning of year	$ 26,592	$ 24,436	$ 22,543
Increases in tax positions for prior years	585	910	225
Decreases in tax positions for prior years	0	(1,083)	(1,068)
Increases in tax positions for current year	1,164	4,003	5,209
Settlements	0	0	(683)
Acquisition reserves	0	0	1,166
Lapse in statute of limitations	(2,442)	(1,674)	(2,956)
Gross unrecognized tax benefits at end of year	$ 25,899	$ 26,592	$ 24,436