Acquisitions - Acquisition Information (Details) | Sep. 19, 2019USD ($)television_station | Jun. 10, 2019USD ($) | May 01, 2019USD ($)television_station | Jan. 01, 2019USD ($) | Nov. 30, 2018USD ($) | Sep. 30, 2019USD ($) | Dec. 31, 2018USD ($) |
Business Acquisition [Line Items] | | | | | | | |
Goodwill | | | | | | $ 1,323,312,000 | $ 834,013,000 |
Indefinite-lived intangible assets - FCC licenses | | | | | | 354,615,000 | $ 157,215,000 |
Nexstar Media Group, Inc. | | | | | | | |
Business Acquisition [Line Items] | | | | | | | |
Number of businesses acquired | television_station | 8 | | | | | | |
Business acquisition, purchase price | $ 582,000,000 | | | | | | |
Revenue of acquiree since acquisition date | | | | | | 9,800,000 | |
Other current assets | 3,541,000 | | | | | | |
Property and equipment | 59,373,000 | | | | | | |
Right-of-use assets | 82,447,000 | | | | | | |
Goodwill | 212,065,000 | | | | | | |
Accrued expenses | (1,635,000) | | | | | | |
Other current liabilities | (2,867,000) | | | | | | |
Operating lease liabilities | (79,766,000) | | | | | | |
Net purchase price | 582,358,000 | | | | | | |
Cordillera Communications, LLC | | | | | | | |
Business Acquisition [Line Items] | | | | | | | |
Number of businesses acquired | television_station | | | 15 | | | | |
Business acquisition, purchase price | | | $ 521,000,000 | | | | |
Net working capital adjustment used in combination | | | 23,900,000 | | | | |
Revenue of acquiree since acquisition date | | | | | | 64,800,000 | |
Accounts receivable | | | 26,264,000 | | | | |
Other current assets | | | 986,000 | | | | |
Property and equipment | | | 53,671,000 | | | | |
Right-of-use assets | | | 4,667,000 | | | | |
Goodwill | | | 253,735,000 | | | | |
Accounts payable | | | (15,000) | | | | |
Accrued expenses | | | (3,835,000) | | | | |
Other current liabilities | | | (280,000) | | | | |
Operating lease liabilities | | | (4,387,000) | | | | |
Net purchase price | | | 544,906,000 | | | | |
Cordillera Communications, LLC and Nexstar Media Group, Inc. | | | | | | | |
Business Acquisition [Line Items] | | | | | | | |
Transaction related costs | | | | | | 19,900,000 | |
Raycom Media, Inc. | | | | | | | |
Business Acquisition [Line Items] | | | | | | | |
Business acquisition, purchase price | | | | $ 55,000,000 | | | |
Revenue of acquiree since acquisition date | | | | | | 17,600,000 | |
Property and equipment | | | | 11,721,000 | | | |
Right-of-use assets | | | | 296,000 | | | |
Goodwill | | | | 18,349,000 | | | |
Operating lease liabilities | | | | (296,000) | | | |
Net purchase price | | | | 54,970,000 | | | |
Raycom Media, Inc., Cordillera Communications, LLC And Nexstar Media Group, Inc. | | | | | | | |
Business Acquisition [Line Items] | | | | | | | |
Accounts receivable | | | | | | 26,264,000 | |
Other current assets | | | | | | 4,527,000 | |
Property and equipment | | | | | | 124,765,000 | |
Right-of-use assets | | | | | | 87,410,000 | |
Goodwill | | | | | | 484,149,000 | |
Accounts payable | | | | | | (15,000) | |
Accrued expenses | | | | | | (5,470,000) | |
Other current liabilities | | | | | | (3,147,000) | |
Operating lease liabilities | | | | | | (84,449,000) | |
Net purchase price | | | | | | 1,182,234,000 | |
Raycom Media, Inc. And Cordillera Communications, LLC | | | | | | | |
Business Acquisition [Line Items] | | | | | | | |
Goodwill | | | | | | 484,000,000 | |
Omny Studio | | | | | | | |
Business Acquisition [Line Items] | | | | | | | |
Business acquisition, purchase price | | $ 8,500,000 | | | | | |
Goodwill | | 5,200,000 | | | | | |
Triton Digital Canada, Inc. | | | | | | | |
Business Acquisition [Line Items] | | | | | | | |
Business acquisition, purchase price | | | | | $ 160,000,000 | | |
Cash | | | | | 10,515,000 | | |
Accounts receivable | | | | | 8,879,000 | | |
Other current assets | | | | | 679,000 | | |
Property and equipment | | | | | 705,000 | | |
Goodwill | | | | | 83,876,000 | | |
Other intangible assets | | | | | 75,000,000 | | |
Accounts payable | | | | | (1,881,000) | | |
Accrued expenses | | | | | (2,964,000) | | |
Other current liabilities | | | | | (19,000) | | |
Deferred tax liability | | | | | (14,577,000) | | |
Net purchase price | | | | | 160,213,000 | | |
Television network affiliation relationships | Nexstar Media Group, Inc. | | | | | | | |
Business Acquisition [Line Items] | | | | | | | |
Other intangible assets | 157,000,000 | | | | | | |
Television network affiliation relationships | Cordillera Communications, LLC | | | | | | | |
Business Acquisition [Line Items] | | | | | | | |
Other intangible assets | | | 168,700,000 | | | | |
Television network affiliation relationships | Raycom Media, Inc. | | | | | | | |
Business Acquisition [Line Items] | | | | | | | |
Other intangible assets | | | | 17,400,000 | | | |
Television network affiliation relationships | Raycom Media, Inc., Cordillera Communications, LLC And Nexstar Media Group, Inc. | | | | | | | |
Business Acquisition [Line Items] | | | | | | | |
Other intangible assets | | | | | | $ 343,100,000 | |
Television network affiliation relationships | Raycom Media, Inc. And Cordillera Communications, LLC | | | | | | | |
Business Acquisition [Line Items] | | | | | | | |
Intangible asset, estimated amortization period | | | | | | 20 years | |
Advertiser relationships | Nexstar Media Group, Inc. | | | | | | | |
Business Acquisition [Line Items] | | | | | | | |
Other intangible assets | 7,300,000 | | | | | | |
Advertiser relationships | Cordillera Communications, LLC | | | | | | | |
Business Acquisition [Line Items] | | | | | | | |
Other intangible assets | | | 5,900,000 | | | | |
Advertiser relationships | Raycom Media, Inc. | | | | | | | |
Business Acquisition [Line Items] | | | | | | | |
Other intangible assets | | | | 700,000 | | | |
Advertiser relationships | Raycom Media, Inc., Cordillera Communications, LLC And Nexstar Media Group, Inc. | | | | | | | |
Business Acquisition [Line Items] | | | | | | | |
Other intangible assets | | | | | | $ 13,900,000 | |
Advertiser relationships | Raycom Media, Inc. And Cordillera Communications, LLC | Minimum | | | | | | | |
Business Acquisition [Line Items] | | | | | | | |
Intangible asset, estimated amortization period | | | | | | 5 years | |
Advertiser relationships | Raycom Media, Inc. And Cordillera Communications, LLC | Maximum | | | | | | | |
Business Acquisition [Line Items] | | | | | | | |
Intangible asset, estimated amortization period | | | | | | 10 years | |
Shared Service Agreements | Cordillera Communications, LLC | | | | | | | |
Business Acquisition [Line Items] | | | | | | | |
Other intangible assets | | | $ 13,000,000 | | | | |
Intangible asset, estimated amortization period | | | 20 years | | | | |
Shared Service Agreements | Raycom Media, Inc., Cordillera Communications, LLC And Nexstar Media Group, Inc. | | | | | | | |
Business Acquisition [Line Items] | | | | | | | |
Other intangible assets | | | | | | $ 13,000,000 | |
Developed Technology Rights | Omny Studio | | | | | | | |
Business Acquisition [Line Items] | | | | | | | |
Other intangible assets | | $ 3,800,000 | | | | | |
Intangible asset, estimated amortization period | | 10 years | | | | | |
Developed Technology Rights | Triton Digital Canada, Inc. | | | | | | | |
Business Acquisition [Line Items] | | | | | | | |
Other intangible assets | | | | | $ 39,000,000 | | |
Developed Technology Rights | Triton Digital Canada, Inc. | Minimum | | | | | | | |
Business Acquisition [Line Items] | | | | | | | |
Intangible asset, estimated amortization period | | | | | 8 years | | |
Developed Technology Rights | Triton Digital Canada, Inc. | Maximum | | | | | | | |
Business Acquisition [Line Items] | | | | | | | |
Intangible asset, estimated amortization period | | | | | 12 years | | |
Customer Relationships | Triton Digital Canada, Inc. | | | | | | | |
Business Acquisition [Line Items] | | | | | | | |
Other intangible assets | | | | | $ 31,000,000 | | |
Intangible asset, estimated amortization period | | | | | 12 years | | |
Trade Names | Triton Digital Canada, Inc. | | | | | | | |
Business Acquisition [Line Items] | | | | | | | |
Other intangible assets | | | | | $ 5,000,000 | | |
Intangible asset, estimated amortization period | | | | | 10 years | | |
Indefinite-lived intangible assets - FCC licenses | Nexstar Media Group, Inc. | | | | | | | |
Business Acquisition [Line Items] | | | | | | | |
Indefinite-lived intangible assets - FCC licenses | $ 144,900,000 | | | | | | |
Indefinite-lived intangible assets - FCC licenses | Cordillera Communications, LLC | | | | | | | |
Business Acquisition [Line Items] | | | | | | | |
Indefinite-lived intangible assets - FCC licenses | | | $ 26,500,000 | | | | |
Indefinite-lived intangible assets - FCC licenses | Raycom Media, Inc. | | | | | | | |
Business Acquisition [Line Items] | | | | | | | |
Indefinite-lived intangible assets - FCC licenses | | | | $ 6,800,000 | | | |
Indefinite-lived intangible assets - FCC licenses | Raycom Media, Inc., Cordillera Communications, LLC And Nexstar Media Group, Inc. | | | | | | | |
Business Acquisition [Line Items] | | | | | | | |
Indefinite-lived intangible assets - FCC licenses | | | | | | $ 178,200,000 | |
Term Loan B, Maturing 2026 | Nexstar Media Group, Inc. | | | | | | | |
Business Acquisition [Line Items] | | | | | | | |
Proceeds from issuance of debt | | | 240,000,000 | | | | |
Term Loan B, Maturing 2026 | Cordillera Communications, LLC | | | | | | | |
Business Acquisition [Line Items] | | | | | | | |
Proceeds from issuance of debt | | | 525,000,000 | | | | |
Term Loan B, Maturing 2026 | Cordillera Communications, LLC and Nexstar Media Group, Inc. | | | | | | | |
Business Acquisition [Line Items] | | | | | | | |
Debt face value | | | $ 765,000,000 | | | | |