Program Rights (Amortization of Owned and Licensed Program Rights) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Owned original program rights
Predominantly Monetized Individually	$ 112,620	$ 74,597	$ 197,447	$ 235,868
Predominantly Monetized as a Group	12,912	11,854	25,049	27,831
Total	125,532	86,451	222,496	263,699
Licensed program rights
Predominantly Monetized Individually	19,579	20,479	65,464	61,741
Predominantly Monetized as a Group	123,181	100,019	313,680	296,764
Total	142,760	120,498	379,144	358,505
Predominantly Monetized Individually	132,199	95,076	262,911	297,609
Predominantly Monetized as a Group	136,093	111,873	338,729	324,595
Total	$ 268,292	$ 206,949	$ 601,640	$ 622,204