Acquisitions and Dispositions - Additional Information (Details) - USD ($)		1 Months Ended		12 Months Ended
	May 09, 2017	Jan. 31, 2019	Oct. 29, 2018	Dec. 31, 2019	Dec. 31, 2018	Jan. 09, 2019	Sep. 02, 2017
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets			$ 9,300,000	$ 210,000	$ 9,961,000
Disposal Group, Including Discontinued Operation, Consideration	$ 23,000,000		9,300,000			$ 210,000
Disposal Group, Including Discontinued Operation, Accounts, Notes and Loans Receivable, Net	3,400,000		566,000				$ 1,300,000
Discontinued Operation, Disposal of Discontinued Operation, Transaction Costs	$ 500,000		$ 25,000	$ 50,000
Payments to Acquire Businesses, Gross		$ 553,000
Ocala Broadcasting Corp [Member]
Business Acquisition [Line Items]
Proceeds from Divestiture of Businesses, Net of Cash Divested					$ 9,840,000