Segment Information - Operating Revenues And Long Lived Assets By Geographic Location (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016
Operating revenues by geographic location:
Total operating revenues	$ 855,120	$ 816,878
Assets:
Total assets	6,202,592		$ 6,200,294
Long-lived assets by geographic location:
Total long-lived assets	4,450,301		4,366,904
Operating Segments [Member] | U.S. Networks [Member]
Operating revenues by geographic location:
Total operating revenues	736,889	702,195
Assets:
Total assets	2,782,139		2,800,137
Operating Segments [Member] | International Networks [Member]
Operating revenues by geographic location:
Total operating revenues	125,525	121,338
Assets:
Total assets	3,077,875		2,991,607
Corporate and Other [Member]
Operating revenues by geographic location:
Total operating revenues	(7,294)	(6,655)
Assets:
Total assets	342,578		408,550
United States
Operating revenues by geographic location:
Total operating revenues	738,094	701,888
Long-lived assets by geographic location:
Total long-lived assets	1,803,591		1,809,919
Poland
Operating revenues by geographic location:
Total operating revenues	99,284	97,758
Long-lived assets by geographic location:
Total long-lived assets	2,251,449		2,172,743
Other International
Operating revenues by geographic location:
Total operating revenues	17,742	$ 17,232
Long-lived assets by geographic location:
Total long-lived assets	$ 395,261		$ 384,242