CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 03, 2016	Jul. 05, 2015	Jul. 03, 2016	Jul. 05, 2015
Net (loss) income	$ (223,546)	$ 102,879	$ (173,560)	$ 135,666
Other comprehensive (loss) income, net of tax:
Foreign currency translation adjustments, net of tax of $0, $0, $0, $0	(5,041)	(6,267)	5,229	(6,267)
Available-for-sale marketable securities:
Unrealized gains (losses) on marketable securities arising during period, net of tax of $1,102, $(1,648), $2,354, $(944), respectively	2,375	(2,675)	5,446	(876)
Less: Reclassification adjustment for gains included in net income, net of tax of $(13), $(40), $(2), $(209), respectively	(51)	(231)	(134)	(561)
Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax, Total	2,324	(2,906)	5,312	(1,437)
Defined benefit pension and post-retirement plans:
Amortization of prior service income included in net periodic pension and post-retirement cost/income, net of tax of $(47), $(42), $(93), $(85), respectively	(83)	(74)	(163)	(147)
Prior service income arising during period, net of tax of $34, $0, $34, $0, respectively	59		59
Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax	(24)	(74)	(104)	(147)
Other comprehensive (loss) income	(2,741)	(9,247)	10,437	(7,851)
Comprehensive (loss) income	$ (226,287)	$ 93,632	$ (163,123)	$ 127,815