Revenue Recognition (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Revenues
Total revenue	$ 37,239	$ 32,173	$ 101,065	$ 100,512
Affiliate fees
Revenues
Total revenue	20,287	19,021	58,231	58,008
Advertising revenue
Revenues
Total revenue	15,855	12,518	40,539	40,962
Other
Revenues
Total revenue	$ 1,097	$ 634	$ 2,295	$ 1,542
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2018-09-30 | Affiliate fees
Revenues
Revenue, remaining performance obligation, expected timing of satisfaction, period	60 days		60 days
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2018-09-30 | Advertising revenue
Revenues
Revenue, remaining performance obligation, expected timing of satisfaction, period	30 days		30 days