Reorganization and Realignment Costs Summary (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 29, 2019	Sep. 30, 2018	Sep. 29, 2019	Sep. 30, 2018
Restructuring Cost and Reserve
Reorganization and realignment costs	$ 403	$ 941	$ 4,771	$ 6,691
G&A Realignment – May 2017 Plan
Restructuring Cost and Reserve
Reorganization and realignment costs	396	629	4,695	6,375
System Optimization
Restructuring Cost and Reserve
Reorganization and realignment costs	$ 7	$ 312	$ 76	$ 316

Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation.

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