Business Segment Information (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Segment Reporting Information [Line Items]
Operating Revenues	$ 489,369	$ 476,978	$ 948,439	$ 937,616
Operating Income (net of depreciation, amortization, asset impairment and facility consolidation charges)	150,080	159,736	273,191	312,038
Depreciation, amortization, asset impairment and facility consolidation charges	20,056	23,981	40,845	44,936
Operating Segments | Media
Segment Reporting Information [Line Items]
Operating Revenues	489,369	474,268	948,439	932,181
Operating Income (net of depreciation, amortization, asset impairment and facility consolidation charges)	164,576	179,238	303,291	348,397
Depreciation, amortization, asset impairment and facility consolidation charges	19,809	21,290	40,326	41,152
Operating Segments | Digital
Segment Reporting Information [Line Items]
Operating Revenues	0	2,710	0	5,435
Operating Income (net of depreciation, amortization, asset impairment and facility consolidation charges)	0	(2,819)	0	(5,468)
Depreciation, amortization, asset impairment and facility consolidation charges	0	359	0	732
Corporate
Segment Reporting Information [Line Items]
Operating Income (net of depreciation, amortization, asset impairment and facility consolidation charges)	(14,496)	(16,683)	(30,100)	(30,891)
Depreciation, amortization, asset impairment and facility consolidation charges	$ 247	$ 2,332	$ 519	$ 3,052