Consolidated Statements of Comprehensive Income (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 28, 2013	Sep. 29, 2012	Sep. 28, 2013	Sep. 29, 2012
Consolidated Statements of Comprehensive Income [Abstract]
Net income	$ 11,692	$ 17,178	$ 56,000	$ 60,407
Other comprehensive (loss) income by component, net of tax:
Unrealized holding (losses) gains arising during period (Net of deferred taxes of $85 and $180 respectively for the 13 weeks ended and $257 and $697 respectively for the 39 Weeks Ended)	(154)	241	(512)	926
Reclassification adjustment for gains included in net income (Net of deferred taxes of $162 and $0 respectively for the 13 weeks ended and $771 and $314 respectively for the 39 weeks ended)	(202)	0	(963)	(394)
Other comprehensive (loss) income, net of tax	(356)	241	(1,475)	532
Comprehensive income, net of tax	$ 11,336	$ 17,419	$ 54,525	$ 60,939