Broadcast Licenses, Goodwill and Other Intangible Assets (Amortizable intangible assets) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 16,330,000	$ 16,315,000
Accumulated Amortization	15,984,000	15,944,000
Net Amount	346,000	371,000
Amortization Expense	42,000	48,000	$ 387,000
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	4,660,000	4,660,000
Accumulated Amortization	4,660,000	4,660,000
Noncompete Agreements
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	3,861,000	3,861,000
Accumulated Amortization	3,861,000	3,861,000
Favorable lease agreements
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	5,965,000	5,965,000
Accumulated Amortization	5,652,000	5,624,000
Net Amount	313,000	341,000
Other intangibles
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	1,844,000	1,829,000
Accumulated Amortization	1,811,000	1,799,000
Net Amount	$ 33,000	$ 30,000