Segment Information - Schedule of Business Segments (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Information regarding business segments
Total operating revenues	$ 231,820	$ 227,817	$ 442,821	$ 437,315
Segment profit (loss)	20,893	26,759	22,382	39,072
Acquisition and related integration costs	0	0	0	(578)
Depreciation and amortization of intangibles	(14,649)	(14,786)	(29,373)	(29,197)
(Losses) gains, net on disposal of property and equipment	(224)	(22)	(311)	(18)
Interest expense	(8,248)	(4,432)	(12,443)	(9,011)
Defined benefit pension plan expense	(3,467)	(3,449)	(6,934)	(6,899)
Miscellaneous, net	5,103	(458)	4,224	(649)
(Loss) income from operations before income taxes	14,281	18,420	7,229	22,513
Depreciation:
Total depreciation	9,153	8,928	18,142	17,584
Amortization of intangibles:
Total amortization of intangibles	5,496	5,858	11,231	11,613
Additions to property and equipment:
Total additions to property and equipment	5,430	6,907	9,674	10,328
Television
Information regarding business segments
Total operating revenues	193,304	191,745	373,102	371,649
Segment profit (loss)	49,785	53,298	84,500	94,985
Depreciation:
Total depreciation	8,002	7,932	15,828	15,397
Amortization of intangibles:
Total amortization of intangibles	3,632	4,240	7,505	8,479
Additions to property and equipment:
Total additions to property and equipment	4,855	6,519	8,802	9,630
Radio
Information regarding business segments
Total operating revenues	17,246	18,183	31,242	32,786
Segment profit (loss)	2,909	3,903	4,517	6,046
Depreciation:
Total depreciation	603	543	1,201	1,080
Amortization of intangibles:
Total amortization of intangibles	265	265	530	530
Additions to property and equipment:
Total additions to property and equipment	367	83	554	316
Digital
Information regarding business segments
Total operating revenues	19,349	15,207	34,706	27,533
Segment profit (loss)	(4,199)	(4,715)	(10,376)	(7,848)
Depreciation:
Total depreciation	15	54	31	108
Amortization of intangibles:
Total amortization of intangibles	1,260	1,014	2,519	1,927
Additions to property and equipment:
Total additions to property and equipment	186	13	197	17
Other
Information regarding business segments
Total operating revenues	1,921	2,682	3,771	5,347
Segment profit (loss)	(1,763)	(1,045)	(1,445)	(152)
Depreciation:
Total depreciation	59	65	126	129
Additions to property and equipment:
Total additions to property and equipment	0	26	0	41
Shared services and corporate
Information regarding business segments
Segment profit (loss)	(10,966)	(9,874)	(25,130)	(24,166)
Depreciation:
Total depreciation	474	334	956	870
Amortization of intangibles:
Total amortization of intangibles	339	339	677	677
Additions to property and equipment:
Total additions to property and equipment	$ 22	$ 266	$ 121	$ 324