Goodwill - (Details) - USD ($) $ in Thousands	Jul. 03, 2021	Dec. 31, 2020
Goodwill [Line Items]
Gross goodwill		$ 252,552
Accumulated goodwill impairment		(81,722)
Goodwill [Roll Forward]
Goodwill	$ 170,830	170,830
Electronic Systems
Goodwill [Line Items]
Gross goodwill		199,157
Accumulated goodwill impairment		(81,722)
Goodwill [Roll Forward]
Goodwill	117,435	117,435
Structural Systems
Goodwill [Line Items]
Gross goodwill		53,395
Accumulated goodwill impairment		0
Goodwill [Roll Forward]
Goodwill	$ 53,395	$ 53,395

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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- Definition

Amount before accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

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-Publisher FASB
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Amount of accumulated impairment loss for an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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