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Goodwill and Intangible Assets - Additional Information (Details) - USD ($) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2026 | Sep. 30, 2025 | Mar. 31, 2025 | Dec. 31, 2025
Goodwill [Line Items] |  |  |  |
Impairments | $ 0 |  |  | $ 126,600,000
Amortization of intangible assets | 1,656,000 |  | $ 1,600,000 |
Sphere |  |  |  |
Goodwill [Line Items] |  |  |  |
Impairments | 0 | $ 0 |  | 0
MSG Networks |  |  |  |
Goodwill [Line Items] |  |  |  |
Impairments | $ 0 | $ 65,400,000 |  | $ 126,600,000

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