Voluntary Early Retirement Program, Employee Termination and Contract Termination Costs - Summary of Voluntary Early Retirement, Employee Termination and Contract Termination Cost Activity (Details) - Voluntary Early Retirement Program, Employee Termination and Contract Termination Costs [Member] $ in Thousands	9 Months Ended
	Sep. 30, 2015 USD ($)
Restructuring Cost and Reserve [Line Items]
Liability as of December 31, 2014	$ 14,072
Net accruals	14,419
Payments	(17,253)
Noncash	(1,419)	[1]
Liability as of September 30, 2015	9,819
U.S. Networks [Member] |
Restructuring Cost and Reserve [Line Items]
Liability as of December 31, 2014	12,041
Net accruals	6,117
Payments	(13,774)
Liability as of September 30, 2015	4,384
Corporate And Other [Member]
Restructuring Cost and Reserve [Line Items]
Liability as of December 31, 2014	2,031
Net accruals	8,302
Payments	(3,479)
Noncash	(1,419)	[1]
Liability as of September 30, 2015	$ 5,435

[1] Amount primarily represents the reclassification of accelerated depreciation included in current period charges.