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Investments (Tables) | 12 Months Ended
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Dec. 31, 2022
Schedule Of Investments [Abstract] |
Schedule of Contractual Maturities of Held to Maturity Investments | The contractual maturities of the Company’s held to maturity investments as of December 31, 2022 and 2021 are summarized below (in thousands):
|  | December 31, 2022 |  |  | December 31, 2021 |
|  | Amortized Cost Basis |  |  | Aggregate Fair Value |  |  | Amortized Cost Basis |  |  | Aggregate Fair Value |
Due in one year or less(1) |  |  | 152,862 |  |  |  | 156,976 |  |  | $ | 103,733 |  |  | $ | 103,669 |
Due after one year through five years |  |  | 1,961 |  |  |  | 1,948 |  |  |  | 56,619 |  |  |  | 56,433 |
Total |  |  | 154,823 |  |  |  | 158,924 |  |  | $ | 160,352 |  |  | $ | 160,102 |
___________________________
(1) | The investments due in one year or less include cash equivalents of $51.8 million as of December 31, 2022 and $23.8 million as of December 31, 2021.
Schedule of Fair Value of Assets and Financing Liability on Total Investments | The fair value of the cash equivalents, long-term and short-term investments are disclosed below (in millions):
|  | December 31, 2022 |
|  | Investment Level |  | Amortized Cost (Carrying Value) |  |  | Gross Unrealized Holding Losses |  |  | Estimated Fair Value |
Commercial bonds and paper |  | Level 2 |  | $ | 66.8 |  |  | $ | (0.6 | ) |  | $ | 66.2 |
Money market funds |  | Level 1 |  |  | 51.8 |  |  |  | — |  |  | $ | 51.8 |
U.S. Treasuries |  | Level 2 |  |  | 36.3 |  |  |  | (0.6 | ) |  | $ | 35.7 |
Total cash equivalents and investments |  |  |  | $ | 154.9 |  |  | $ | (1.2 | ) |  | $ | 153.7 |
Less cash equivalents |  |  |  |  | (51.8 | ) |  |  | — |  |  |  | (51.8 | )
Total Investments |  |  |  | $ | 103.1 |  |  | $ | (1.2 | ) |  | $ | 101.9 |
|  | December 31, 2021 |
|  | Investment Level |  | Amortized Cost (Carrying Value) |  |  | Gross Unrealized Holding Losses |  |  | Estimated Fair Value |
Commercial bonds and paper |  | Level 2 |  | $ | 115.2 |  |  | $ | 0.2 |  |  | $ | 115.0 |
Money market funds |  | Level 1 |  |  | 21.3 |  |  |  | — |  |  |  | 21.3 |
U.S. Treasuries |  | Level 2 |  |  | 23.9 |  |  |  | 0.1 |  |  |  | 23.8 |
Total cash equivalents and investments |  |  |  | $ | 160.4 |  |  | $ | 0.3 |  |  | $ | 160.1 |
Less cash equivalents |  |  |  |  | (23.8 | ) |  |  | — |  |  |  | (23.8 | )
Total Investments |  |  |  | $ | 136.6 |  |  | $ | 0.3 |  |  | $ | 136.3 |

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