Organization and Significant Accounting Policies - Summary of Level 3 Activity (Details) $ in Thousands	6 Months Ended
	Jun. 28, 2019 USD ($)
Pension Obligation [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Beginning balance	$ 3,531
Fair value adjustments	(238)
Ending balance	3,293
Purchase Obligation [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Beginning balance	8,500
Ending balance	8,500
Contingent Earn-out Liability [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Beginning balance	3,924
Additions	1,428
Fair value adjustments	(1,482)
Ending balance	$ 3,870