Goodwill and Intangible Assets - Schedule of Intangible Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 35,221	$ 35,776
Accumulated Amortization	24,703	20,656
Net Carrying Value	10,518	15,120
Amortization of Intangible Assets	4,047	4,312	$ 4,956
Subscriber relationships
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	17,570	17,912
Accumulated Amortization	10,337	8,347
Net Carrying Value	7,233	9,565
Distribution rights
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	4,233	4,385
Accumulated Amortization	1,731	1,450
Net Carrying Value	2,502	2,935
Internally developed software
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	2,327	2,324
Accumulated Amortization	2,327	2,206
Net Carrying Value	0	118
Proprietary content
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	8,164	8,223
Accumulated Amortization	7,439	5,908
Net Carrying Value	725	2,315
Intellectual property
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	2,284	2,284
Accumulated Amortization	2,284	2,284
Net Carrying Value	0	0
Favorable lease
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	643	648
Accumulated Amortization	585	461
Net Carrying Value	58	187
Cost of service sales
Finite-Lived Intangible Assets [Line Items]
Amortization of Intangible Assets	1,532	1,477	2,068
General administrative expense
Finite-Lived Intangible Assets [Line Items]
Amortization of Intangible Assets	$ 2,515	$ 2,835	$ 2,888