Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended
	Apr. 02, 2017	Apr. 03, 2016
Income Tax Contingency [Line Items]
Provision for income taxes	$ 3,921	$ 7,747
Unrecognized tax benefits, gross	29,400
Uncertain tax benefits if recognized that could affect the continuing operations effective tax rate	27,700
Uncertain tax positions including accrued interest, net of tax benefits and penalties, to be resolved within the next year	$ 4,600
Open Tax Years by Major Tax Jurisdiction, Begin Date	2010
Tax Adjustments, Settlements, and Unusual Provisions	$ (2,500)	(800)
Discontinued Operation, Tax Effect of Discontinued Operation	1,218	2,465
Income Tax Expense (Benefit), Intraperiod Tax Allocation	5,139	$ 10,212
Excess Income Tax Benefit on Stock Compensation	$ (1,100)