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Income Taxes - Change in Effective Rate (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 29, 2019
Sep. 30, 2018
Sep. 29, 2019
Sep. 30, 2018
Income Tax Disclosure [Abstract]        
(Benefit) provision for income taxes $ (660) $ (3,317) $ 6,051 $ (6,516)
Effective income tax rate (7.60%)   5.50% (7.20%)
Change in effective income tax rate, percent     12.70%  
Blended federal and state statutory income tax rate     26.00%