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Fair Value Measurement (Tables)
9 Months Ended
Sep. 30, 2023
Fair Value Disclosures [Abstract]  
Summary of Fair Value, Assets Measured on Recurring Basis
The following table summarizes the Company’s fair value hierarchy for its financial assets and liabilities measured at fair value on a recurring basis (in millions):
September 30, 2023
Level 1Level 2Level 3Total
Financial assets:
Cash, cash equivalents, and restricted cash$269.4 $— $— $269.4 
Fixed maturities available-for-sale:
U.S. government and agencies22.1 — — 22.1 
States and other territories— 9.5 — 9.5 
Corporate securities— 69.4 — 69.4 
Foreign securities— 0.9 — 0.9 
Residential mortgage-backed securities— 18.9 — 18.9 
Commercial mortgage-backed securities— 7.0 — 7.0 
Asset backed securities— 13.7 — 13.7 
Total fixed maturities available-for-sale22.1 119.4 — 141.5 
Short-term investments
U.S. government and agencies123.3 — — 123.3 
Commercial paper— 47.6 — 47.6 
Corporate securities— 17.6 — 17.6 
Total short-term investments123.3 65.2 — 188.5 
Total financial assets$414.8 $184.6 $— $599.4 
Financial liabilities:
Contingent consideration liability$— $— $13.5 $13.5 
Public warrants0.1 — — 0.1 
Private placement warrants— 0.1 — 0.1 
Total financial liabilities$0.1 $0.1 $13.5 $13.7 
December 31, 2022
Level 1Level 2Level 3Total
Financial assets:
Cash, cash equivalents, and restricted cash$244.5 $— $— $244.5 
Fixed maturities available-for-sale:
U.S. government and agencies21.1 — — 21.1 
States and other territories— 8.3 — 8.3 
Corporate securities— 52.5 — 52.5 
Foreign securities— 0.8 — 0.8 
Residential mortgage-backed securities— 18.9 — 18.9 
Commercial mortgage-backed securities— 5.8 — 5.8 
Asset backed securities— 13.7 — 13.7 
Total fixed maturities available-for-sale21.1 100.0 — 121.1 
Short-term investments
U.S. government and agencies128.9 — — 128.9 
Commercial paper— 146.5 — 146.5 
Corporate securities— 49.4 — 49.4 
Total short-term investments128.9 195.9 — 324.8 
Total financial assets$394.5 $295.9 $— $690.4 
Financial liabilities:
Contingent consideration liability$— $— $11.9 $11.9 
Public warrants0.2 — — 0.2 
Private placement warrants— 0.1 — 0.1 
Total financial liabilities$0.2 $0.1 $11.9 $12.2 
Summary of Liabilities Measured on at Fair Value, Unobservable Input Reconciliation The table below presents the changes in the contingent consideration liability valued using Level 3 inputs (in millions):
20232022
Balance as of January 1,$11.9 $11.6 
Payments of contingent consideration(2.9)(2.4)
Changes in fair value4.5 2.6 
Balance as of September 30,$13.5 $11.8