Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended
	Apr. 05, 2020	Mar. 31, 2019
Income Tax Contingency [Line Items]
Share-based Payment Arrangement, Expense	$ 3,050	$ 6,097
Provision for income taxes	974	1,312
Unrecognized tax benefits, gross	34,900
Uncertain tax benefits if recognized that could affect the continuing operations effective tax rate	33,200
Uncertain tax positions including accrued interest, net of tax benefits and penalties, to be resolved within the next year	$ 4,100
Open Tax Years by Major Tax Jurisdiction, Begin Date	2010
Tax Adjustments, Settlements, and Unusual Provisions	$ (4,900)	(4,000)
Discontinued Operation, Tax Effect of Discontinued Operation	50	41
Income Tax Expense (Benefit), Intraperiod Tax Allocation	1,024	1,353
Excess Income Tax Benefit on Stock Compensation	(1,600)	$ (2,900)
Valuation allowance adjustments [Member]
Income Tax Contingency [Line Items]
Tax Adjustments, Settlements, and Unusual Provisions	$ (3,800)