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] |
Mar. 31, 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% |