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Acquisitions - Narrative (Details) $ in Millions |  |  | 12 Months Ended |  |
--- | --- | --- | --- | --- | ---
May 23, 2022 USD ($) | Mar. 09, 2022 USD ($) | Dec. 29, 2024 USD ($) | Dec. 31, 2023 USD ($) | Dec. 25, 2022 USD ($) | Oct. 03, 2024 USD ($) | Oct. 03, 2023 USD ($) shares
Business Acquisition [Line Items] |  |  |  |  |  |  |
Deferred tax assets, net |  |  | $ 59.5 | $ 64.0 |  |  |
Goodwill |  |  | 568.9 | 569.1 |  |  |
Level 3 | Discount Rate | Income Approach |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Discount rate | 0.064 |  |  |  |  |  |
Level 3 | Royalty Rate | Income Approach | Minimum |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Discount rate | 0.11 |  |  |  |  |  |
Level 3 | Royalty Rate | Income Approach | Maximum |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Discount rate | 0.12 |  |  |  |  |  |
Southern Research Engineering Division |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Business combination, consideration transferred | $ 79.4 | $ 79.4 |  |  |  |  |
Cash paid | 74.4 | 74.4 |  |  |  |  |
Common stock issued | 5.0 | $ 5.0 |  |  |  |  |
Net liabilities | 2.5 |  |  |  |  |  |
Deferred tax assets, net | 0.2 |  |  |  |  |  |
Business combination, pro forma information, revenue of acquiree since acquisition date, actual |  |  | 63.5 | 53.2 | $ 26.8 |  |
Business combination, pro forma information, earnings or loss of acquiree since acquisition date, actual |  |  | $ 5.1 | $ 3.6 | $ 2.9 |  |
Goodwill | 34.3 |  |  |  |  |  |
Accounts receivable | 2.9 |  |  |  |  |  |
Southern Research Engineering Division | Trade names |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Finite-lived intangible assets acquired | $ 0.5 |  |  |  |  |  |
Acquired finite-lived intangible assets, weighted average useful life | 5 years |  |  |  |  |  |
Southern Research Engineering Division | Contracts and backlog |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Finite-lived intangible assets acquired | $ 2.5 |  |  |  |  |  |
Acquired finite-lived intangible assets, weighted average useful life | 3 years |  |  |  |  |  |
Southern Research Engineering Division | In orocess research and development |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Finite-lived intangible assets acquired | $ 7.3 |  |  |  |  |  |
Southern Research Engineering Division | Developed technology and technical know-how |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Finite-lived intangible assets acquired | $ 0.5 |  |  |  |  |  |
Acquired finite-lived intangible assets, weighted average useful life | 3 years |  |  |  |  |  |
Sierra Technical Services Inc |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Number of common stock shares acquired (in shares) | shares |  |  |  |  |  |  | 866,026
Business acquisition, common stock value acquired |  |  |  |  |  |  | $ 12.8
Number of additional common shares to be acquired (in shares) | shares |  |  |  |  |  |  | 42,523
Additional equity interests issuable |  |  |  |  |  | $ 1.1 |
Net assets |  |  |  |  |  |  | $ 12.6
Goodwill |  |  |  |  |  |  | 10.7
Accounts receivable |  |  |  |  |  |  | 11.0
Finite-lived intangible assets acquired |  |  |  |  |  |  | 14.0
Deferred revenue |  |  |  |  |  |  | $ 11.4

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