Accumulated Other Comprehensive Income (Tables)

6 Months Ended

Jun. 28, 2014

Accumulated Other Comprehensive Income [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 28, 2013	$	3,939
Other comprehensive income before reclassifications		1,168
Amounts reclassified from accumulated other comprehensive income		(26)
Net current period other comprehensive income		1,142
Accumulated other comprehensive income balance as of June 28, 2014	$	5,081

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			26 Weeks Ended
(dollars in thousands)	Location		June 28, 2014		June 29, 2013		June 28, 2014		June 29, 2013
Unrealized gains on available-for-sale marketable securities
	Investment income	$	5	$	1,322	$	46	$	1,369
	Provision for income taxes		(2)		(587)		(20)		(608)
Total amount reclassified, net of tax		$	3	$	735	$	26	$	761