Goodwill and Intangible Assets - Indefinite Lived Net Balance (Details) $ in Thousands	Sep. 30, 2020 USD ($)
Changes in the goodwill
Net balance at the beginning of the period	$ 167,322
Net balance at the end of the period	167,322
Changes in the goodwill and other indefinite lived intangible assets, on a net basis
Net balance at the beginning of the period	225,364
Net balance at the end of the period	225,364
Broadcast license
Changes in other indefinite-lived intangible assets
Net balance at the beginning of the period	41,356
Net balance at the end of the period	41,356
Goodwill
Changes in the goodwill
Net balance at the beginning of the period	167,322
Net balance at the end of the period	167,322
Brands
Changes in other indefinite-lived intangible assets
Net balance at the beginning of the period	15,986
Net balance at the end of the period	15,986
Other intangibles
Changes in other indefinite-lived intangible assets
Net balance at the beginning of the period	700
Net balance at the end of the period	$ 700