Restructuring Charges Narrative (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 27, 2020	Jun. 27, 2020	Jun. 29, 2019
Restructuring Cost and Reserve [Line Items]
Severance costs		$ 4,669	$ 377
Aerospace Segment
Restructuring Cost and Reserve [Line Items]
Restructuring, settlement and impairment provisions	$ 100	400
Severance costs	$ 4,800	$ 5,000

Amount of expenses for special or contractual termination benefits provided to current employees involuntarily terminated under a benefit arrangement associated exit or disposal activities pursuant to an authorized plan. Excludes expenses related to one-time termination benefits, a discontinued operation or an asset retirement obligation.

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