Income Taxes (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jul. 01, 2018	Jun. 30, 2019	Jul. 01, 2018
Income Tax Disclosure [Abstract]
Tax impact	$ 756	$ 1,271	$ 2,963	$ 1,185
Effective tax rate	47.40%	70.50%	17.80%	43.30%
Possible reduction in liabilities for uncertain tax positions	$ 1,100		$ 1,100