Basis Of Presentation And Significant Accounting Policies (Details)				3 Months Ended		6 Months Ended
		Feb. 07, 2019	Nov. 30, 2018 USD ($) $ / shares	Jun. 30, 2019 USD ($)	Jun. 30, 2018 USD ($)	Jun. 30, 2019 USD ($)	Jun. 30, 2018 USD ($)	Jul. 31, 2019 station	Apr. 08, 2019 station	Mar. 20, 2019 station	Dec. 31, 2018 USD ($)
Investment Holdings [Line Items]
Total operating revenues				$ 484,036,000	$ 489,358,000	$ 939,024,000	$ 932,993,000
Operating profit (loss)	[1]			73,281,000	98,066,000	127,984,000	285,351,000
Topix LLC | Variable Interest Entity, Not Primary Beneficiary
Investment Holdings [Line Items]
Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount				4,000,000		4,000,000					$ 5,000,000
Corporate and Other
Investment Holdings [Line Items]
Total operating revenues				1,479,000	2,941,000	3,040,000	5,874,000
Operating profit (loss)	[1]			(26,322,000)	(21,701,000)	(51,544,000)	(46,268,000)
Dreamcatcher Stations | Variable Interest Entity, Primary Beneficiary
Investment Holdings [Line Items]
Total operating revenues				20,000,000	19,000,000	38,000,000	37,000,000
Operating profit (loss)				$ 4,000,000	$ 5,000,000	$ 8,000,000	$ 8,000,000
Nexstar Merger
Investment Holdings [Line Items]
Business Acquisition, Share Price | $ / shares			$ 46.50
Business Acquisition, Share Price, Daily Price Increase After Target Close Date			$ 0.009863
Hart-Scott-Rodino Antitrust Improvement Act of 1976 Waiting Period		30 days
Television Stations Nexstar Proposes to Divest | station										19
Television Markets Nexstar Proposes to Divest										15
Contract Termination Fee			135,000,000
Contract Termination Fees Nexstar Cost Reimbursement			$ 15,000,000
Nexstar Merger | Tribune Media Company
Investment Holdings [Line Items]
Television Stations Nexstar Proposes to Divest | station										10
Nexstar Merger | Dreamcatcher Stations
Investment Holdings [Line Items]
Television Stations Nexstar Proposes to Divest | station										3
Nexstar Merger | Nexstar
Investment Holdings [Line Items]
Television Stations Nexstar Proposes to Divest | station									2
Nexstar Merger | Subsequent Event
Investment Holdings [Line Items]
Television Markets Proposed to Divest in Filed Complaint | station								13

[1] (1) Operating profit (loss) for each segment excludes income and loss on equity investments, interest income, interest expense, pension and other postretirement period benefit cost (credit), non-operating items, reorganization costs and income taxes.