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Equity Investments (Narrative) (Details) - USD ($) shares in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022
Schedule of Equity Method Investments [Line Items] |  |
Carrying value | $ 8,896,000 | $ 11,697,000
Long-term investments | $ 564,488,000 | 388,055,000
Tractor [Member] |  |
Schedule of Equity Method Investments [Line Items] |  |
Investment shares owned | 4,325 |
Ownership percentage | 10.20% |
Cash consideration | $ 10,000,000 |
Equity method investment, impairment | 0 | 0
Carrying value | 8,896,000 | 11,697,000
Tractor Warrants [Member] |  |
Schedule of Equity Method Investments [Line Items] |  |
Carrying value | $ 8,675,000 | 10,747,000
Number of shares that may be called by warrants | 2,162 |
Nuro [Member] |  |
Schedule of Equity Method Investments [Line Items] |  |
Investment shares owned | 766 |
Recognized gain | $ 5,968,000 |
Long-term investments | 15,968,000 | 15,968,000
Cultivate Fund [Member] |  |
Schedule of Equity Method Investments [Line Items] |  |
Carrying value | $ 21,221,000 | $ 6,140,000

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