Significant Accounting Policies and Recently Issued Accounting Standards (Property, Plant and Equipment by Type) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Property, Plant and Equipment
Total	$ 343,893	$ 422,966
Less accumulated depreciation	(325,440)	(396,705)
Property, plant and equipment, net	18,453	26,261
Land [Member]
Property, Plant and Equipment
Total	2,191	2,220
Buildings and improvements
Property, Plant and Equipment
Total	$ 85,316	111,411
Buildings and improvements | Minimum [Member]
Property, Plant and Equipment
Estimated useful life	5 years
Buildings and improvements | Maximum [Member]
Property, Plant and Equipment
Estimated useful life	30 years
Publishing equipment
Property, Plant and Equipment
Total	$ 174,019	216,891
Publishing equipment | Minimum [Member]
Property, Plant and Equipment
Estimated useful life	3 years
Publishing equipment | Maximum [Member]
Property, Plant and Equipment
Estimated useful life	20 years
Other
Property, Plant and Equipment
Total	$ 80,678	92,293
Other | Minimum [Member]
Property, Plant and Equipment
Estimated useful life	3 years
Other | Maximum [Member]
Property, Plant and Equipment
Estimated useful life	10 years
Construction In Progress [Member]
Property, Plant and Equipment
Total	$ 1,689	$ 151