Program Rights (Amortization of Owned and Licensed Program Rights) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Owned original program rights
Predominantly Monetized Individually	$ 33,906	$ 105,561
Predominantly Monetized as a Group	4,566	0
Total	38,472	105,561
Licensed program rights
Predominantly Monetized Individually	25,020	21,352
Predominantly Monetized as a Group	87,495	97,069
Total	112,515	118,421
Predominantly Monetized Individually	58,926	126,913
Predominantly Monetized as a Group	92,061	97,069
Total	$ 150,987	$ 223,982