Contracts Payable for Broadcast Rights Narrative (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Contracts Payable For Broadcast Rights [Abstract]
Program Rights Obligations	$ 553,664	$ 556,000

Total amount of obligations related to rights to programming, including, but not limited to, feature films and episodic series, acquired under license agreements.

No definition available.

Name:	us-gaap_ProgramRightsObligations
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant