Segment Information - Schedule of Business Segments (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Information regarding business segments
Total operating revenues	$ 337,495	$ 283,395	$ 629,658	$ 537,586
Segment profit (loss)	22,172	22,469	22,312	21,841
Acquisition and related integration costs	(2,788)	0	(6,268)	0
Restructuring costs	(957)	(2,330)	(1,895)	(6,137)
Depreciation and amortization of intangible assets	(20,237)	(15,382)	(38,029)	(30,802)
Gains (losses), net on disposal of property and equipment	(144)	66	(317)	(651)
Interest expense	(18,023)	(9,279)	(26,939)	(18,038)
Defined benefit pension plan expense	(1,564)	(1,389)	(3,136)	(2,777)
Miscellaneous, net	369	(156)	(431)	11
Income (loss) from continuing operations before income taxes	2,954	11,645	(8,194)	1,037
Depreciation:
Total depreciation	9,995	7,890	18,970	15,989
Amortization of intangible assets:
Total amortization of intangible assets	10,242	7,492	19,059	14,813
Additions to property and equipment:
Total additions to property and equipment	17,131	14,677	31,343	25,911
Local Media
Information regarding business segments
Total operating revenues	236,715	213,248	440,102	405,307
Segment profit (loss)	54,329	53,368	88,502	84,987
Depreciation:
Total depreciation	8,391	7,331	15,982	14,887
Amortization of intangible assets:
Total amortization of intangible assets	5,468	3,705	9,426	7,410
Additions to property and equipment:
Total additions to property and equipment	12,411	10,613	21,891	20,113
National Media
Information regarding business segments
Total operating revenues	98,506	68,226	185,823	128,947
Segment profit (loss)	6,573	2,037	11,514	4,072
Depreciation:
Total depreciation	1,198	134	2,202	230
Amortization of intangible assets:
Total amortization of intangible assets	4,435	3,448	8,956	6,726
Additions to property and equipment:
Total additions to property and equipment	4,346	4,051	8,636	5,725
Other
Information regarding business segments
Total operating revenues	2,274	1,921	3,733	3,332
Segment profit (loss)	(1,485)	(1,643)	(1,918)	(1,894)
Depreciation:
Total depreciation	39	38	77	76
Additions to property and equipment:
Total additions to property and equipment	179	0	210	0
Shared services and corporate
Information regarding business segments
Segment profit (loss)	(13,119)	(13,647)	(29,277)	(27,734)
Depreciation:
Total depreciation	367	387	709	796
Amortization of intangible assets:
Total amortization of intangible assets	339	339	677	677
Additions to property and equipment:
Total additions to property and equipment	$ 195	$ 13	$ 606	$ 73