Goodwill and Intangible Assets - Indefinite Lived Net Balance (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2019 USD ($)
Changes in the goodwill
Net balance at the beginning of the period	$ 169,994
Net balance at the end of the period	170,068
Changes in the goodwill and other indefinite lived intangible assets, on a net basis
Net balance at the beginning of the period	228,036
Additions	74
Net balance at the end of the period	228,110
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	169,994
Additions	74
Net balance at the end of the period	170,068
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