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
	Apr. 02, 2016	Apr. 04, 2015
Derivative [Line Items]
Derivatives qualifying as hedges, net of tax, portion attributable to parent	$ (1,124)	$ (841)
Interest Rate Swap
Derivative [Line Items]
Derivatives qualifying as hedges, net of tax, portion attributable to parent	(1,124)	(841)
Derivatives qualifying as hedges, tax, portion attributable to parent	$ 709	$ 525