Other Assets and Accrued Liabilities - Current Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Jan. 01, 2019	Dec. 31, 2018
Other Liabilities Disclosure [Abstract]
Sales and property taxes payable	$ 3,789		$ 4,281
Asset retirement obligations	148		582
Accrued programming costs	3,023		2,886
Financing leases	94		0
FCC spectrum license obligations	105		0
Other current liabilities	7,232		6,814
Accrued liabilities and other	$ 14,391	$ 14,151	$ 14,563