Income Taxes - Income Tax Expense (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]
Income tax expense	$ 9,415	$ 9,999	$ 10,719	$ 15,250
Effective income tax rate from continuing operations	27.20%	29.80%	16.20%	25.10%