Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended
	Apr. 01, 2018	Apr. 02, 2017	Dec. 31, 2017
Effective Income Tax Rate	(40.50%)	30.50%
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent	21.00%	35.00%
Employee Service Share-based Compensation, Tax Benefit from Exercise of Stock Options	$ 6,093
Benefit from (provision for) income taxes	5,806	$ (9,793)
Accounts and notes receivable, net
Income Taxes Receivable	24,697		$ 26,262
Tax Act
Benefit from (provision for) income taxes	3,623
Release of valuation allowances on foreign tax credits	5,578
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Amount	$ (1,955)