Number of operating segments. An operating segment is a component of an enterprise: (a) that engages in business activities from which it may earn revenues and incur expenses (including revenues and expenses relating to transactions with other components of the same enterprise), (b) whose operating results are regularly reviewed by the enterprise's chief operating decision maker to make decisions about resources to be allocated to the segment and assess its performance, and (c) for which discrete financial information is available. An operating segment may engage in business activities for which it has yet to earn revenues, for example, start-up operations may be operating segments before earning revenues.

No definition available.

Name:	us-gaap_NumberOfOperatingSegments
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

Description Of Business And Basis Of Presentation (Details) $ in Thousands	3 Months Ended			6 Months Ended
	Sep. 30, 2017 USD ($)	Jun. 30, 2017 USD ($)	Jun. 30, 2016 USD ($)	Jun. 30, 2017 USD ($) segment network	Jun. 30, 2016 USD ($)
Subsequent Event [Line Items]
Program Rights Write Offs		$ 1,382	$ 1,080	$ 1,779	$ 1,080
Number of Operating Segments \| segment				2
Number of Nationally Distributed Programming Networks \| network				5
Impairment charges		$ 17,112	$ 0	$ 17,112	$ 0
Subsequent Event [Member]
Subsequent Event [Line Items]
Expected Pre-tax Loss on Asset Held for Sale	$ 12,100