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Other Business Combinations - Narrative (Details) - USD ($) $ in Millions | Feb. 04, 2022 | Nov. 19, 2021 | Nov. 24, 2020 | Mar. 06, 2020
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Contracts and backlog intangible |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Acquired finite-lived intangible assets, weighted average useful life |  |  | 9 years |
Buffalo Group |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Consideration transferred |  |  | $ 190.1 |
Business combination consideration paid in cash |  |  | 182.4 |
Contingent consideration |  |  | 7.7 |
Long term liabilities |  |  | 7.7 |
Cash and cash equivalents |  |  | $ 8.4 |
Wood Group |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Goodwill recognized expected to be deductible for tax purposes |  |  |  | $ 0.0
Business combination, enterprise value |  |  |  | 246.0
Business combinations, less cash |  |  |  | 317.9
Cash and cash equivalents |  |  |  | $ 24.3
Wood Group | Technology |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Acquired finite-lived intangible assets, weighted average useful life |  |  |  | 15 years
Wood Group | Contracts and backlog intangible |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Acquired finite-lived intangible assets, weighted average useful life |  |  |  | 12 years
StreetLightData, Inc. |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Business combination consideration paid in cash | $ 190.8 |  |  |
Goodwill recognized expected to be deductible for tax purposes | 0.0 |  |  |
Cash and cash equivalents | 7.3 |  |  |
Business combination consideration equity issued | 0.9 |  |  |
Money stock options | 5.2 |  |  |
Transferred liabilities incurred | $ 1.0 |  |  |
StreetLightData, Inc. | Technology |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Acquired finite-lived intangible assets, weighted average useful life | 5 years |  |  |
StreetLightData, Inc. | Customer Relationships, Contracts and Backlog |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Acquired finite-lived intangible assets, weighted average useful life | 4 years |  |  |
StreetLightData, Inc. | Contracts and backlog intangible |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Acquired finite-lived intangible assets, weighted average useful life | 9 years |  |  |
BlackLynx |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Business combination consideration paid in cash |  | $ 235.4 |  |
Long term liabilities |  | 5.3 |  |
Goodwill recognized expected to be deductible for tax purposes |  | 0.0 |  |
Cash and cash equivalents |  | $ 5.1 |  |
BlackLynx | Technology |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Acquired finite-lived intangible assets, weighted average useful life |  | 8 years |  |
BlackLynx | Contracts and backlog intangible |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Acquired finite-lived intangible assets, weighted average useful life |  | 4 years |  |

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