Net Income Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 28, 2019	Sep. 29, 2018	Sep. 28, 2019	Sep. 29, 2018
Earnings Per Share, Basic and Diluted [Abstract]
Net income	$ 101,514	$ 99,318	$ 329,304	$ 247,352
Weighted average common shares used to calculate basic net income per share	273,329	273,716	273,224	273,718
Stock-based awards	7,337	7,930	7,593	7,673
Weighted average common shares used to calculate diluted net income per share	280,666	281,646	280,817	281,391
Net income per share - basic	$ 0.37	$ 0.36	$ 1.21	$ 0.90
Net income per share - diluted	$ 0.36	$ 0.35	$ 1.17	$ 0.88