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Acquisitions - Narrative (Details) - USD ($) | 3 Months Ended | 4 Months Ended | 6 Months Ended | 18 Months Ended
--- | --- | --- | --- | ---
Jun. 30, 2022 | Jun. 30, 2021 | Jun. 30, 2022 | Jun. 30, 2022 | Jun. 30, 2022 | Jun. 30, 2021 | Jun. 30, 2022
Business Acquisition [Line Items] |  |  |  |  |  |  |
Goodwill acquired during period |  |  |  | $ 48,768,000 |  |  | $ 126,600,000
Goodwill deductible for tax purposes | $ 2,000,000 |  | $ 2,000,000 | 2,000,000 | $ 2,000,000 |  | $ 2,000,000
Transaction costs, excluding integration and transformation costs | 400,000 | $ 2,000,000 |  | 4,900,000 |  | $ 6,100,000 |
Customer relationships | Series of Individually Immaterial Asset Acquisitions |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Finite-lived intangible assets acquired | 0 | $ 0 |  | $ 0 |  | $ 0 |
BA Insight |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Revenues since acquisition date | 2,000,000 |  | $ 2,800,000 |  |  |  |
Objectif Lune |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Revenues since acquisition date | $ 5,600,000 |  |  |  | $ 10,500,000 |  |

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- Definition This element represents the amount of revenue of the acquiree since the acquisition date included in the consolidated income statement for the reporting period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1) -URI https://asc.fasb.org/extlink&oid=79982066&loc=d3e1392-128463 + Details
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- Definition Amount of increase in assets, excluding financial assets, lacking physical substance with a definite life, from an acquisition. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (a)(1) -URI https://asc.fasb.org/extlink&oid=66006027&loc=d3e16265-109275 + Details
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