Other Income, Net (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Jan. 02, 2016	Jan. 03, 2015
Other Income (Expense), Net
Interest income	$ 2,917	$ 2,667	$ 1,827
Gains on sale of marketable debt and equity securities, net	317	21	722
Gains on sale of non-marketable equity investments	2,668	2,348	2,524
Gains (losses) on securities in NQDC trust	1,741	(369)	3,415
Gains on foreign exchange	6,879	5,606	1,742
Gain on sale of property, plant and equipment	923	0	0
Write-down of non-marketable investments	0	0	(1,956)
Other income, net	477	204	205
Total other income, net	$ 15,922	$ 10,477	$ 8,479