Employee Termination Programs - Summary of Rollforward of the Liability Related to the Restructuring Charges by Segment (Details) - Voluntary Early Retirement Program, Employee Termination and Contract Termination Costs [Member] - USD ($) $ in Thousands		6 Months Ended
		Jun. 30, 2016	Jun. 30, 2015
Restructuring Cost And Reserve [Line Items]
Liability, beginning balance		$ 5,919	$ 14,072
Net accruals		(310)	11,175
Payments		(4,925)	(14,482)
Non-cash	[1]	333	(946)
Liability, ending balance		1,017	9,819
U.S. Networks [Member]
Restructuring Cost And Reserve [Line Items]
Liability, beginning balance		605	12,041
Net accruals		5	5,261
Payments		(610)	(12,913)
Liability, ending balance			4,389
Corporate and Other [Member]
Restructuring Cost And Reserve [Line Items]
Liability, beginning balance		5,314	2,031
Net accruals		(315)	5,914
Payments		(4,315)	(1,569)
Non-cash	[1]	333	(946)
Liability, ending balance		$ 1,017	$ 5,430

[1] Primarily represents the reclassification of current period charges for accelerated depreciation, pension payments made from the pension plan and share-based compensation