Stockholders' Equity (Components Of Accumulated Other Comprehensive Loss) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 30, 2018	Dec. 31, 2017	Jan. 01, 2017	Jan. 03, 2016
Cumulative Translation Adjustment Summary [Roll Forward]
Foreign currency translation adjustment, net of tax, beginning of year	$ (46,582)	$ (100,923)	$ (46,846)
Current year change	(123,388)	54,341	(54,077)
Foreign currency translation adjustment, net of tax, end of year	(176,459)	(46,582)	(100,923)
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, after Tax	0
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Net of Tax	0
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	(6,489)
Other Comprehensive Income (Loss), after Reclassifications, Net of Tax	(123,474)
Unrecognized prior service costs, net of tax	245	322	399	$ 1,259
Unrecognized prior service costs, net of tax, current year change	(77)	(77)	(860)
Unrealized (losses) gains on securities, net of tax	(267)	(258)	(337)	(369)
Unrealized (losses) gains on securities, net of tax, current year change	(9)	79	32
Other comprehensive (loss) income	(129,963)	54,343	(54,905)
Accumulated other comprehensive income (loss)	(176,481)	(46,518)	(100,861)	$ (45,956)
Other Comprehensive Income (Loss), Foreign Currency Translation Adjustments Reclassification From AOCI to Earnings Due to ASU 2018-02	$ 6,489	$ 0	$ 0