CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jul. 01, 2012	Jul. 03, 2011	Jul. 01, 2012	Jul. 03, 2011
Net income	$ 111,387	$ 87,252	$ 144,951	$ 184,096
Other comprehensive income, net of tax:
Foreign currency translation reclassification adjustment included in net income				2,266
Unrealized gains on marketable securities:
Unrealized gains on marketable securities arising during period	452	1,421	1,196	1,620
Less: Reclassification adjustment for gains included in net income	(24)	(126)	(490)	(310)
Unrealized gains on marketable securities	428	1,295	706	1,310
Defined benefit pension and post-retirement plans:
Amortization of prior service (benefit) cost included in net periodic pension and post-retirement costs	(92)	5	(183)	11
Other comprehensive income	336	1,300	523	3,587
Comprehensive income	$ 111,723	$ 88,552	$ 145,474	$ 187,683