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Fair Value Measurements (Tables) | 3 Months Ended
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Mar. 31, 2024
Fair Value Disclosures [Abstract] |
Schedule of Fair Value of Assets | he Company recognized the following assets at fair value on a recurring basis in the consolidated balance sheets:
| Fair Value Measurements at Reporting Date Using
(in thousands) | Total |  | Level 1 |  | Level 2 |  | Level 3
As of March 31, 2024 |  |  |  |  |  |  |
Equity securities | $ | 109,861 |  |  | $ | 109,861 |  |  | $ | — |  |  | $ | — |
Mutual funds(1) | 40,413 |  |  | 40,413 |  |  | — |  |  | — |
Money market funds(1) | 4,653 |  |  | — |  |  | 4,653 |  |  | — |
Total | $ | 154,927 |  |  | $ | 150,274 |  |  | $ | 4,653 |  |  | $ | — |
As of December 31, 2023 |  |  |  |  |  |  |
Equity securities | $ | 116,374 |  |  | $ | 116,374 |  |  | $ | — |  |  | $ | — |
Mutual funds(1) | 36,810 |  |  | 36,810 |  |  | — |  |  | — |
Money market funds(1) | 4,767 |  |  | — |  |  | 4,767 |  |  | — |
Total | $ | 157,951 |  |  | $ | 153,184 |  |  | $ | 4,767 |  |  | $ | — |
(1) The current assets at fair value noted above are presented in prepaid expenses and other current assets in the consolidated balance sheets. The long-term assets at fair value noted above are presented in investments for employee benefit plans, at fair value in the consolidated balance sheets.
Schedule of Investments in Equity Securities | The following table is a summary of the unrealized gains and losses of the investments in equity securities:
|  | As of March 31, 2024 |  | As of December 31, 2023
(in thousands) |  | Cost |  | Gross Unrealized Gains |  | Gross Unrealized Losses |  | Estimated Fair Value |  | Cost |  | Gross Unrealized Gains |  | Gross Unrealized Losses |  | Estimated Fair Value
Equity securities |  | $ | 111,190 |  |  | $ | — |  |  | $ | (1,329) |  |  | $ | 109,861 |  |  | $ | 112,420 |  |  | $ | 3,954 |  |  | $ | — |  |  | $ | 116,374 |
Schedule of Carrying Amounts and Fair Values | As of March 31, 2024 and December 31, 2023, the carrying amounts and the fair values were as follows:
| March 31, 2024 |  | December 31, 2023
(in thousands) | Carrying Amount |  | Fair Value |  | Carrying Amount |  | Fair Value
2020 Senior Notes | $ | 445,842 |  |  | $ | 395,127 |  |  | $ | 445,690 |  |  | $ | 389,241 |
2019 Senior Notes | $ | 396,590 |  |  | $ | 358,660 |  |  | $ | 396,440 |  |  | $ | 355,068 |

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- Definition Tabular disclosure of equity method investments including, but not limited to, name of each investee or group of investments, percentage ownership, difference between recorded amount of an investment and the value of the underlying equity in the net assets, and summarized financial information. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 323 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481687/323-10-50-3 + Details
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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://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482106/820-10-50-2 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -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 + Details
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- Definition Tabular disclosure of information pertaining to carrying amount and estimated fair value of short-term and long-term debt instruments or arrangements, including but not limited to, identification of terms, features, and collateral requirements. + References No definition available. + Details
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