Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 01, 2018	Jul. 02, 2017	Jul. 01, 2018	Jul. 02, 2017	Dec. 31, 2017
Effective Income Tax Rate Reconciliation, Percent	29.30%		11.60%	35.60%
Income (loss) before income taxes	$ 42,264	$ (297)	$ 56,617	$ 31,837
(Provision for) benefit from income taxes	$ (12,388)	$ (1,548)	$ (6,582)	$ (11,341)
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent	21.00%	35.00%	21.00%	35.00%
Employee Service Share-based Compensation, Tax Benefit from Exercise of Stock Options	$ 798		$ 6,891
Quantifying Misstatement in Current Year Financial Statements, Amount		$ 2,248		$ 2,248
Accounts and notes receivable, net
Income Taxes Receivable	17,768		17,768		$ 26,262
Income Taxes Receivable, Noncurrent	$ 5,523		5,523		$ 0
Tax Act
(Provision for) benefit from income taxes			2,795
Release of valuation allowances on foreign tax credits			4,750
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Amount			$ (1,955)
System Optimization
(Provision for) benefit from income taxes		$ (2,166)