Consolidated Statements of Comprehensive Income (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 29, 2014	Mar. 30, 2013
Consolidated Statements of Comprehensive Income [Abstract]
Net income	$ 14,766	$ 20,129
Other comprehensive income by component, net of tax:
Unrealized holding gains arising during period (Net of deferred taxes of $658 and $427, respectively)	933	607
Reclassification adjustment for gains included in net income (Net of deferred taxes of $18 and $21, respectively)	(23)	(26)
Other comprehensive income, net of tax	910	581
Comprehensive income, net of tax	$ 15,676	$ 20,710