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Fair Value Measurements - Schedule of Estimated Fair Values and Carrying Amounts of Long-term Debt Not Measured at Fair Value on a Recurring Basis (Parenthetical) (Details) - Fair Value, Nonrecurring [Member] - Nexstar [Member] - Senior Subordinated Notes [Member] | Jun. 30, 2025 | Dec. 31, 2024
--- | --- | ---
5.625 % Notes due 2027 [Member] |  |
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |  |
Interest rate | 5.625% | 5.625%
4.75% Notes due 2028 [Member] |  |
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |  |
Interest rate | 4.75% | 4.75%

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