Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 29, 2019	Sep. 30, 2018	Sep. 29, 2019	Sep. 30, 2018	Dec. 30, 2018
Effective Income Tax Rate	13.50%	21.60%	20.50%	20.60%
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent	21.00%	21.00%	21.00%	21.00%
Employee Service Share-based Compensation, Tax Benefit from Exercise of Stock Options	$ 1,103	$ 5,251	$ 4,028	$ 12,142
(Provision for) benefit from income taxes	(7,184)	$ (107,668)	(28,527)	(114,250)
Unrecognized Tax Benefits, Reduction Resulting from Lapse of Applicable Statute of Limitations	5,639		6,475
Decrease in Unrecognized Tax Benefits is Reasonably Possible	2,081		2,081
Income Taxes Receivable	6,719		6,719		$ 14,475
Income Taxes Receivable, Noncurrent	$ 0		$ 0		$ 0
Tax Act
(Provision for) benefit from income taxes				(2,076)
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Amount				(2,426)
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Share-based Compensation Cost, Amount				(991)
Effective Income Tax Rate Reconciliation, Tax Credit, Foreign, Amount				$ 1,341