Accumulated Other Comprehensive Income (Tables)

3 Months Ended

Mar. 30, 2013

Equity [Abstract]

Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]

		Unrealized Gains on
		Available-for-Sale
(dollars in thousands)		Marketable Securities
Accumulated other comprehensive income balance as of December 29, 2012	$	5,019
Other comprehensive income before reclassifications		607
Amounts reclassified from accumulated other comprehensive income		(26	)
Net current period other comprehensive income		581
Accumulated other comprehensive income balance as of March 30, 2013	$	5,600

Reclassification out of Accumulated Other Comprehensive Income [Table Text Block]

		Gains (Losses) Reclassified from
		Accumulated Other Comprehensive
		Income to the Consolidated
		Statements of Income
		13 Weeks Ended
(dollars in thousands)	Location	March 30, 2013			March 31, 2012
Unrealized gains on available-for-sale marketable securities	Investment income	$	47		$	3
	Provision for income taxes		(21	)		(1	)
Total amount reclassified, net of tax		$	26		$	2