Business Acquisitions - Schedule of Supplemental Pro-Forma Information (Detail) $ in Millions	3 Months Ended
Mar. 31, 2024 USD ($)
Business Acquisition [Line Items]
Total pro-forma revenues	$ 138.1
Total pro-forma net income	11.5
Insurtech [Member]
Business Acquisition [Line Items]
Total pro-forma revenues	3.9
Total pro-forma net income	0.7
2024 Acquisitions [Member]
Business Acquisition [Line Items]
Total pro-forma revenues	0.8
Total pro-forma net income	(0.2)
Emerald Revenue [Member]
Business Acquisition [Line Items]
Total pro-forma revenues	133.4
Emerald net Income [Member]
Business Acquisition [Line Items]
Total pro-forma net income	$ 11.0

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 805
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479907/805-20-50-5

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- Definition

The pro forma net Income or Loss for the period as if the business combination or combinations had been completed at the beginning of a period.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 805
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (h)(2)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479328/805-10-50-2

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 805
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (h)(3)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479328/805-10-50-2

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The pro forma revenue for a period as if the business combination or combinations had been completed at the beginning of the period.

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