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Fair Value (Tables) | 9 Months Ended
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Sep. 30, 2024
Fair Value Disclosures [Abstract] |
Assets Measured on Recurring Basis | The table below sets forth the Company’s financial assets that are measured at fair value on a recurring, monthly basis in accordance with ASC 820.
|  |  |  | Fair Value
(in millions) |  | Level in Fair Value Hierarchy |  | September 30, 2024 |  | December 31, 2023
Equity investment in TuSimple (1) |  | 1 |  | $ | 0.1 |  |  | $ | 0.3 |
Marketable securities (2) |  | 2 |  | 52.6 |  |  | 57.2 |
(1)Our equity investment in TuSimple is classified as Level 1 in the fair value hierarchy as shares of TuSimple’s Class A common stock are traded on an Over the Counter (“OTC”) market beginning February 8, 2024 and the NASDAQ prior to that date. See Note 5, Investments, for additional information. (2)Marketable securities are classified as Level 2 in the fair value hierarchy as they are valued based on quoted prices for similar assets in active markets or quoted prices for identical or similar assets in markets that are not active. See Note 5, Investments, for additional information.

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- Definition Tabular disclosure of assets, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, by class that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 + Details
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