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Business Combinations - Narrative (Details) - USD ($) $ in Millions |  | 1 Months Ended | 3 Months Ended | 6 Months Ended | 9 Months Ended | 12 Months Ended |
--- | --- | --- | --- | --- | --- | --- | ---
Jun. 07, 2021 | Apr. 30, 2022 | Sep. 30, 2021 | Jul. 31, 2021 | Jun. 30, 2021 | Dec. 31, 2021 | Sep. 30, 2022 | Sep. 30, 2022 | Dec. 31, 2021 | Dec. 31, 2020
2022 Business Acquisitions |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Cash consideration |  | $ 150.6 |  |  |  |  | $ 150.6 |  |  |
Conversion of Note Receivable |  | 10.0 |  |  |  |  | 10.0 |  |  |
Business combination, contingent consideration, equity awards |  | $ 3.7 |  |  |  |  |  |  |  |
Value of consideration transferred |  |  |  |  |  |  | $ 160.6 |  |  |
2022 Business Acquisitions | Restricted Stock Units |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Number of shares issued (in shares) |  | 448,740 |  |  |  |  |  |  |  |
Equity interests issued and issuable |  | $ 26.8 |  |  |  |  |  |  |  |
Insent |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Cash consideration |  |  |  |  | $ 32.9 |  |  |  |  |
Value of consideration transferred |  |  |  |  | 34.0 |  |  |  |  |
Deferred purchase consideration | $ 1.1 |  |  |  | 1.1 |  |  |  |  |
Incentive compensation |  |  |  |  | $ 2.0 |  |  |  |  |
Insent | Restricted Stock Units |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Number of shares issued (in shares) |  |  |  |  | 36,118 |  |  |  |  |
Equity interests issued and issuable |  |  |  |  | $ 2.4 |  |  |  |  |
Chorus.ai |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Value of consideration transferred |  |  |  | $ 547.4 |  |  |  |  |  |
Incentive compensation |  |  |  | 6.0 |  |  |  |  |  |
Cash refund from Chorus.ai acquisition |  |  |  |  |  | $ 33.9 |  |  |  |
Certain unvested options issued |  |  |  | $ 31.8 |  |  |  |  |  |
Chorus.ai | Restricted Stock Units |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Number of shares issued (in shares) |  |  |  | 572,921 |  |  |  |  |  |
Equity interests issued and issuable |  |  |  | $ 30.3 |  |  |  |  |  |
RingLead |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Cash consideration |  |  | $ 114.9 |  |  |  |  |  |  |
Value of consideration transferred |  |  | 116.0 |  |  |  |  |  |  |
Deferred purchase consideration |  |  | 1.1 |  |  |  |  |  |  |
Incentive compensation |  |  | $ 3.7 |  |  |  |  |  |  |
RingLead | Restricted Stock Units |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Number of shares issued (in shares) |  |  | 42,854 |  |  |  |  |  |  |
Equity interests issued and issuable |  |  | $ 2.8 |  |  |  |  |  |  |
2021 Business Acquisitions |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Value of consideration transferred |  |  |  |  |  |  |  | $ 697.4 |  |
Deferred purchase consideration |  |  |  |  |  |  |  | 2.2 |  |
Cash refund from Chorus.ai acquisition |  |  |  |  |  |  |  | $ 0.0 |  |
Revenue from acquired companies |  |  |  |  |  |  |  |  | $ 13.2 |
Transaction costs incurred |  |  |  |  |  | $ 12.6 |  |  | $ 12.6 | $ 12.6

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