Reorganization and Realignment Costs Summary (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 27, 2020	Sep. 29, 2019	Sep. 27, 2020	Sep. 29, 2019
Restructuring Cost and Reserve
Reorganization and realignment costs	$ 3,375	$ 403	$ 10,196	$ 4,771
Operations and Field Realignment
Restructuring Cost and Reserve
Reorganization and realignment costs	3,021	0	3,021	0
IT Realignment
Restructuring Cost and Reserve
Reorganization and realignment costs	403	0	6,809	0
G&A Realignment
Restructuring Cost and Reserve
Reorganization and realignment costs	(49)	396	282	4,695
System Optimization
Restructuring Cost and Reserve
Reorganization and realignment costs	$ 0	$ 7	$ 84	$ 76

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.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
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