Basis Of Presentation And Significant Accounting Policies - Dreamcatcher (Details) - USD ($) $ in Thousands		Mar. 31, 2019	Dec. 31, 2018
Variable Interest Entity [Line Items]
Broadcast rights		$ 82,132	$ 95,876
Other intangible assets, net		1,405,559	1,442,456
Other assets		141,999	152,992
Total Assets (1)	[1]	8,420,134	8,251,391
Contracts payable for broadcast rights		220,255	232,687
Other liabilities		118,613	154,599
Total Liabilities (1)	[1]	4,794,369	4,728,294
Variable Interest Entity, Primary Beneficiary
Variable Interest Entity [Line Items]
Total Assets (1)		69,000	73,000
Total Liabilities (1)		27,000	28,000
Dreamcatcher | Variable Interest Entity, Primary Beneficiary
Variable Interest Entity [Line Items]
Broadcast rights		1,671	2,355
Other intangible assets, net		58,754	61,386
Other assets		8,515	8,770
Total Assets (1)		68,940	72,511
Contracts payable for broadcast rights		1,528	2,186
Long-term deferred revenue		23,948	24,164
Other liabilities		1,248	1,291
Total Liabilities (1)		$ 26,724	$ 27,641

[1] (1) The Company’s consolidated total assets as of March 31, 2019 and December 31, 2018 include total assets of variable interest entities (“VIEs”) of $69 million and $73 million, respectively, which can only be used to settle the obligations of the VIEs. The Company’s consolidated total liabilities as of March 31, 2019 and December 31, 2018 include total liabilities of the VIEs of $27 million and $28 million, respectively, for which the creditors of the VIEs have no recourse to the Company (see Note 1).