Discontinued Operations (Details Textual) - USD ($)						9 Months Ended
		Nov. 03, 2017	Oct. 05, 2017	Sep. 01, 2017	May 09, 2017	Sep. 30, 2017		Sep. 30, 2016		Dec. 31, 2016
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Disposal Group, Including Discontinued Operation, Consideration					$ 23,000,000
Disposal Group, Including Discontinued Operation, Income Tax Rate	[1]					41.00%
Discontinued Operation, Disposal of Discontinued Operation ,Transaction Costs						$ 50,000
Proceeds from Divestiture of Businesses, Net of Cash Divested						69,528,000		$ 0
Disposal Group, Including Discontinued Operation, Accounts, Notes and Loans Receivable, Net						1,300,000
Payments to Acquire Businesses, Net of Cash Acquired				$ 24,200,000		24,200,000
Subsequent Event [Member] | Revolving Credit Facility [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Repayments of Lines of Credit		$ 5,000,000	$ 5,287,000
Joplin, Missouri and Victoria, Texas Television Stations [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Recognized gain on net of tax						29,900,000
Disposal Group, Including Discontinued Operation, Consideration					66,600,000
Discontinued Operation, Disposal of Discontinued Operation ,Transaction Costs					500,000
Proceeds from Divestiture of Businesses, Net of Cash Divested					69,500,000	69,500,000	[2]	$ 0	[2]
Disposal Group, Including Discontinued Operation, Accounts, Notes and Loans Receivable, Net					$ 1,300,000	0				$ 3,868,000
Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal						$ 50,800,000

[1] No depreciation expense was recorded by the Company beginning May 9, 2017, the date the Television segment’s assets were held for sale.

[2] Net proceeds from the sale of the television stations reflect the sale price of $66.6 million, and the proceeds from sale of accounts receivable of approximately $3.4 million, offset by certain closing adjustments and transactional costs of approximately $500 thousand.