Reorganization and Realignment Costs Summary (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2019	Jul. 01, 2018	Jun. 30, 2019	Jul. 01, 2018
Restructuring Cost and Reserve
Reorganization and realignment costs	$ 3,570	$ 3,124	$ 4,368	$ 5,750
G&A Realignment – May 2017 Plan
Restructuring Cost and Reserve
Reorganization and realignment costs	3,517	3,120	4,299	5,746
System Optimization
Restructuring Cost and Reserve
Reorganization and realignment costs	$ 53	$ 4	$ 69	$ 4

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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