Stockholders' Equity (Schedule Of Changes in Accumulated Other Comprehensive Income by Component Net of Tax) (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 28, 2014
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Accumulated Other Comprehensive Income (Loss), Net of Tax	$ 69
Other comprehensive income (loss) before reclassifications	(155)
Amounts reclassified from accumulated other comprehensive income	236
Net current period other comprehensive income (loss)	81
Accumulated Other Comprehensive Income (Loss), Net of Tax	150
Accumulated Net Unrealized Investment Gain (Loss) [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Accumulated Other Comprehensive Income (Loss), Net of Tax	4
Other comprehensive income (loss) before reclassifications	15
Amounts reclassified from accumulated other comprehensive income	0
Net current period other comprehensive income (loss)	15
Accumulated Other Comprehensive Income (Loss), Net of Tax	19
Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Accumulated Other Comprehensive Income (Loss), Net of Tax	65
Other comprehensive income (loss) before reclassifications	(170)
Amounts reclassified from accumulated other comprehensive income	236
Net current period other comprehensive income (loss)	66
Accumulated Other Comprehensive Income (Loss), Net of Tax	$ 131