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Financial Instruments - Narrative (Details) - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Debt Securities, Available-for-Sale [Line Items] |  |  |
Unrealized gains (losses) on equity securities | $ 0 | $ 0 |
Cash and cash equivalents | 283,043,000 | 227,380,000 |
Credit losses recorded for available-for-sale debt securities | 0 | 0 |
12 months or longer, gross unrealized losses | 4,000 | 0 |
Sales of marketable securities | 0 | 861,000 | $ 0
Available-for-sale | 259,251,000 |  | 0
Money market mutual funds |  |  |
Debt Securities, Available-for-Sale [Line Items] |  |  |
Cash and cash equivalents |  |  | $ 0
Fair Value, Nonrecurring |  |  |
Debt Securities, Available-for-Sale [Line Items] |  |  |
Material impairments on assets | 0 | 0 |
Fair Value, Inputs, Level 2 |  |  |
Debt Securities, Available-for-Sale [Line Items] |  |  |
Fair value of debt | 478,500,000 | 451,000,000 |
Cash and cash equivalents | $ 22,177,000 | $ 8,499,000 |

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- Definition Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(1)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147483467/210-10-45-1 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 4 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482740/230-10-45-4 + Details
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