Stockholders' Equity (Schedule Of Changes in Accumulated Other Comprehensive Income by Component Net of Tax) (Details) $ in Thousands	6 Months Ended
	Jun. 28, 2015 USD ($)
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	$ 38
Other comprehensive income (loss) before reclassifications	(866)
Amounts reclassified from accumulated other comprehensive income	771
Net current period other comprehensive income (loss)	(95)
Ending balance	(57)
Gain and losses on available for for securities [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	(5)
Other comprehensive income (loss) before reclassifications	17
Amounts reclassified from accumulated other comprehensive income	0
Net current period other comprehensive income (loss)	17
Ending balance	12
Gains and losses on derivatives [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	43
Other comprehensive income (loss) before reclassifications	(883)
Amounts reclassified from accumulated other comprehensive income	771
Net current period other comprehensive income (loss)	(112)
Ending balance	$ (69)