Derivative Instruments (Change In Unrealized Net of Tax Gains (Losses) Included In Other Comprehensive Income Due To Fluctuations In Interest Rates And Foreign Exchange Rates) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 02, 2016	Jul. 04, 2015	Jul. 02, 2016	Jul. 04, 2015
Derivative [Line Items]
Derivatives qualifying as hedges, net of tax, portion attributable to parent	$ (503)	$ 845	$ (1,627)	$ 4
Interest Rate Swap
Derivative [Line Items]
Derivatives qualifying as hedges, net of tax, portion attributable to parent	(503)	845	(1,627)	4
Derivatives qualifying as hedges, tax, portion attributable to parent	$ 319	$ (527)	$ 1,028	$ (2)