Accumulated Other Comprehensive Income (Schedule of Accumulated Other Comprehensive Income) (Details) - Accumulated Net Investment Gain (Loss) Attributable to Parent [Member] - USD ($) $ in Thousands	12 Months Ended
	Dec. 26, 2015	Dec. 27, 2014
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive income balance, beginning balance	$ 4,829	$ 3,939
Other comprehensive (loss) income before reclassifications	(52)	927
Amounts reclassified from accumulated other comprehensive income	(16)	(37)
Net current period other comprehensive (loss) income	(68)	890
Accumulated other comprehensive income balance, ending balance	$ 4,761	$ 4,829