Income Taxes (Unrecognized Tax Benefits - Text) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 29, 2019	Dec. 30, 2018	Dec. 31, 2017	Dec. 25, 2016
Income Tax Contingency [Line Items]
Unrecognized tax benefits	$ 27,201	$ 25,190	$ 23,663	$ 19,583
Portion of unrecognized tax benefits, including accrued interest and penalties, that if recognized, would impact the effective tax rate	27,000	25,000
Unrecognized tax benefits, income tax penalties and interest accrued	1,900	1,500
Unrecognized tax benefits, increase resulting from prior period tax positions	869	$ 2,461	$ 4,149
Minimum [Member]
Income Tax Contingency [Line Items]
Unrecognized tax benefits, increase resulting from prior period tax positions	2,000
Maximum [Member]
Income Tax Contingency [Line Items]
Unrecognized tax benefits, increase resulting from prior period tax positions	$ 3,000