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Acquisitions - Consideration Paid (Details) - USD ($) $ in Millions |  |  |  | 9 Months Ended
--- | --- | --- | --- | ---
Jun. 30, 2020 | Jun. 15, 2020 | Feb. 27, 2019 | Sep. 27, 2020 | Sep. 29, 2019
Business Acquisition [Line Items] |  |  |  |  |
Total consideration |  |  |  | $ 43.9 | $ 17.6
FTT |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Cash paid |  |  | $ 20.7 |  |
Deferred purchase consideration |  |  | 15.3 |  |
Common stock issued |  |  | 27.0 |  |
Total |  |  | 63.0 |  |
Less: Cash acquired |  |  | (3.0) |  |
Total consideration |  |  | $ 60.0 |  |
CPI ASC Signal Division, Inc. |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Cash paid | $ 34.9 | $ 35.0 |  |  |
Less: Cash acquired | (2.0) |  |  |  |
Total consideration | $ 32.9 |  |  |  |

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