Long-Term Debt - Narrative (Details)						3 Months Ended		7 Months Ended	12 Months Ended
	Jul. 31, 2023 USD ($)	Jan. 07, 2021 USD ($)	Dec. 30, 2020 USD ($)	Jul. 26, 2019 USD ($)	May 01, 2019 USD ($)	Dec. 31, 2022 USD ($)	Mar. 31, 2022 USD ($)	Jul. 31, 2023 USD ($)	Dec. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Mar. 10, 2025 USD ($)	Feb. 28, 2023 USD ($)	Oct. 02, 2017 USD ($)
Debt Instrument [Line Items]
Long-term debt									$ 2,605,307,000	$ 2,950,919,000
Gain on extinguishment of debt						$ 7,400,000	$ 1,200,000		0	0	$ 8,589,000
Senior Notes
Debt Instrument [Line Items]
Aggregate principal amount of reduction													$ 500,000,000
Revolving credit facility | Letter of Credit
Debt Instrument [Line Items]
Outstanding letter of credits									6,900,000	6,700,000
Revolving credit facility | Revolving credit facility
Debt Instrument [Line Items]
Long-term debt									$ 0	$ 330,000,000
Weighted average interest rate, over the period									8.03%	8.20%
Net leverage ratio requirement	5.0							5.0
Revolving credit facility | Revolving credit facility | Minimum
Debt Instrument [Line Items]
Percentage of commitment fees of total unused commitment under revolving credit facility	0.30%
LIBOR plus margin range	1.75%
Revolving credit facility | Revolving credit facility | Maximum
Debt Instrument [Line Items]
Percentage of commitment fees of total unused commitment under revolving credit facility	0.50%
LIBOR plus margin range	2.75%
Term loan, due in 2024
Debt Instrument [Line Items]
Weighted average interest rate, over the period								7.22%
Debt issued														$ 300,000,000
Redemption of senior notes	$ 283,000,000
Write off of deferred financing costs	400,000
Term loan, due in 2026
Debt Instrument [Line Items]
LIBOR plus margin range					2.56%
Long-term debt									$ 721,213,000	$ 728,825,000
Weighted average interest rate, over the period									7.84%	8.01%
Annual principal payment					$ 7,600,000
Debt issuance costs					23,000,000.0
Variable interest rate									7.03%	8.03%
Minimum LIBOR rate		0.75%
Term loan, due in 2028
Debt Instrument [Line Items]
LIBOR plus margin range		3.00%
Long-term debt									$ 543,000,000	$ 551,000,000
Minimum LIBOR rate		0.75%
Annual principal payments		$ 8,000,000
Redemption of senior notes											100,000,000
Write off of deferred financing costs											$ 1,100,000
Term loan, due in 2028 | Medium-Term Note
Debt Instrument [Line Items]
Weighted average interest rate, over the period									8.28%	8.44%
Debt stated rate									7.47%	8.47%
Sixth Amendment Facility
Debt Instrument [Line Items]
Debt issuance costs		23,400,000
Senior secured notes 3.875%, due in 2029 | Senior Notes
Debt Instrument [Line Items]
Debt issued			$ 550,000,000
Debt issuance costs			$ 13,800,000
Debt stated rate			3.875%
Debt issuance price as percentage of par			100.00%
Redemption of senior notes							$ 26,600,000
Senior secured notes 3.875%, due in 2029 | Senior unsecured notes
Debt Instrument [Line Items]
Debt redemption price							93.59%
Eighth Amendment to the Third Amended Restated Credit Agreement | Revolving credit facility
Debt Instrument [Line Items]
Revolving credit and term loan agreement	585,000,000							$ 585,000,000
Proceeds from lines of credit	$ 283,000,000
Eighth Amendment to the Third Amended Restated Credit Agreement | Revolving credit facility | Debt Covenant Period Two
Debt Instrument [Line Items]
Net leverage ratio requirement	4.75							4.75
Eighth Amendment to the Third Amended Restated Credit Agreement | Revolving credit facility | Debt Covenant Period Three
Debt Instrument [Line Items]
Net leverage ratio requirement	4.50							4.50
Senior unsecured notes, due in 2027 | Senior Notes
Debt Instrument [Line Items]
Debt issued				$ 500,000,000
Debt issuance costs				$ 10,700,000
Debt stated rate				5.875%
Debt issuance price as percentage of par				100.00%
Redemption of senior notes						$ 16,800,000	$ 42,200,000
Senior unsecured notes, due in 2027 | Senior unsecured notes
Debt Instrument [Line Items]
Long-term debt									$ 425,667,000	$ 425,667,000
Debt redemption price						90.63%	100.61%
Senior unsecured notes, due in 2031 | Senior Notes
Debt Instrument [Line Items]
Debt issued			$ 500,000,000
Debt issuance costs			$ 12,500,000
Debt stated rate			5.375%
Debt issuance price as percentage of par			100.00%
Debt redemption price			100.00%
Redemption of senior notes						$ 31,400,000	$ 54,500,000
Senior unsecured notes, due in 2031 | Senior unsecured notes
Debt Instrument [Line Items]
Long-term debt									$ 392,071,000	$ 392,071,000
Debt redemption price						78.71%	95.73%
TSA, Revolving Credit Facility | Revolving credit facility | Subsequent Event
Debt Instrument [Line Items]
Revolving credit and term loan agreement												$ 208,000,000
TSA, Accounts Receivable Securitization Facility | Secured Debt | Subsequent Event
Debt Instrument [Line Items]
Revolving credit and term loan agreement												$ 450,000,000
Cordillera Communications, LLC And Nexstar Media Group, Inc. | Term loan, due in 2026
Debt Instrument [Line Items]
Debt issued					$ 765,000,000
ION Media | Term loan, due in 2028 | Medium-Term Note
Debt Instrument [Line Items]
Debt issued		$ 800,000,000