Disposal of Assets (Narrative) (Details) $ in Thousands				3 Months Ended			9 Months Ended
	Oct. 01, 2020 USD ($)	Apr. 03, 2020 USD ($)	May 17, 2019 USD ($)	Sep. 30, 2020 USD ($)	Sep. 30, 2019 USD ($) customer	Mar. 31, 2019 customer	Sep. 30, 2020 USD ($)	Sep. 30, 2019 USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of local and national commercial print customers | customer					5	30
Loss on disposal of newspaper production assets and website software					$ 1,362
Proceeds from sale of assets							$ 5	$ 4,597
Current notes receivable				$ 22,775			22,775
(Gain) loss on sale/disposal of assets, net				$ (61)	(1,362)		$ (56)	$ 24,546
Dallas, Texas [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
(Gain) loss on sale/disposal of assets, net					$ (25,908)
Charter DMN Holdings, LP [Member] | Subsequent Event [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from interest payment by Purchaser	$ 253
Charter DMN Holdings, LP [Member] | Dallas, Texas [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Sale of real estate assets, amount			$ 28,000
Proceeds from sale of assets			4,597
Real estate assets selling costs			1,000
Long-term note receivable			$ 22,400
Notes receivable term			2 years
Additional contingency payment receivable if certain conditions are met			$ 1,000
Interest rate on promissory note during first year							3.50%
Interest rate on promissory note during second year							4.50%
Second Promissory Note [Member] | Charter DMN Holdings, LP [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Current notes receivable		$ 375
Note receivable, due date		Jun. 30, 2021
Second Promissory Note [Member] | Charter DMN Holdings, LP [Member] | Deferred Purchaser's Interest Payment [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Current notes receivable		$ 195
Second Promissory Note [Member] | Charter DMN Holdings, LP [Member] | 2019 Real Property Tax Reconciliation Payment Due from Purchaser [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Current notes receivable		$ 180