Income Taxes (Valuation Allowance Rollforward) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 29, 2019	Dec. 30, 2018	Dec. 31, 2017
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at the beginning of period	$ 16,373	$ 13,912	$ 36,800
Additions charged to expense and other	2,863	12,590	5,566
Deductions	(3,667)	(10,129)	(28,454)
Balance at the end of period	$ 15,569	$ 16,373	$ 13,912