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, Diluted [Line Items]
Net income (loss) attributable to shareholders		$ 92,131	$ 176,533	$ (316,100)	$ 485,542
Weighted-average shares outstanding - basic		82,711	87,602	84,246	87,785
Net effect of various dilutive stock-based compensation awards		686	1,006	0	974
Weighted-average shares outstanding - diluted		83,397	88,608	84,246	88,759
Net income (loss) per share:
Basic		$ 1.11	$ 2.02	$ (3.75)	$ 5.53
Diluted	[1]	$ 1.10	$ 1.99	$ (3.75)	$ 5.47
Stock Compensation Plan [Member]
Net income (loss) per share:
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount		1,086	582	1,886	540

[1] As the company reported a net loss attributable to shareholders for the first nine months of 2019, basic and diluted net loss per share attributable to shareholders are the same and stock-based compensation awards for the issuance of 1,886 shares were excluded from the computation of net income per share on a diluted basis as their effect was anti-dilutive. Stock-based compensation awards for the issuance of 1,086 shares for the third quarter of 2019, and 582 and 540 shares for the third quarter and first nine months of 2018, respectively, were excluded from the computation of net income per share on a diluted basis as their effect was anti-dilutive.