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Goodwill By Reportable Segment (Details) - USD ($) $ in Thousands | Apr. 03, 2020 | Dec. 31, 2019
--- | --- | ---
Goodwill [Line Items] |  |
Goodwill | $ 419,948 | $ 425,939
Accumulated impairment of goodwill | (151,229) | (151,229)
Total | 268,719 | 274,710
Photonics |  |
Goodwill [Line Items] |  |
Goodwill | 210,107 | 213,413
Accumulated impairment of goodwill | (102,461) | (102,461)
Total | 107,646 | 110,952
Vision |  |
Goodwill [Line Items] |  |
Goodwill | 158,347 | 160,086
Accumulated impairment of goodwill | (31,722) | (31,722)
Total | 126,625 | 128,364
Precision Motion |  |
Goodwill [Line Items] |  |
Goodwill | 51,494 | 52,440
Accumulated impairment of goodwill | (17,046) | (17,046)
Total | $ 34,448 | $ 35,394

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