Segment Information - Schedule of Business Segments (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Segment operating revenues:
Total operating revenues	$ 272,692	$ 233,040	$ 227,817	$ 209,498	$ 204,808	$ 189,691	$ 198,134	$ 123,023	$ 943,047	$ 715,656	$ 498,752
Segment profit (loss):
Operating Income (Loss)									126,650	(82,872)	25,533
Defined benefit pension plan expense									(14,332)	(58,674)	(5,671)
Acquisition and related integration costs									(578)	(37,988)	(9,708)
Depreciation and amortization of intangibles	(14,492)	(14,892)	(14,786)	(14,411)	(14,018)	(16,273)	(13,366)	(8,295)	(58,581)	(51,952)	(32,180)
Impairment of goodwill and intangibles	0	0				(24,613)			0	(24,613)	0
Gains (losses), net on disposal of property and equipment	(499)	(26)	(22)	4	96	(200)	(215)	(164)	(543)	(483)	2,872
Interest expense	(4,436)	(4,592)	(4,432)	(4,579)	(4,576)	(4,246)	(4,225)	(2,052)	(18,039)	(15,099)	(8,494)
Miscellaneous, net	(1,401)	$ (596)	$ (458)	$ (191)	(1,433)	$ 1,061	$ 387	$ (1,436)	(2,646)	(1,421)	(7,693)
Income (loss) from continuing operations before income taxes, extraordinary items, noncontrolling interest									105,965	(99,392)	9,346
Depreciation:
Total depreciation									34,791	34,178	24,168
Amortization of intangibles:
Total amortization of intangibles									23,790	17,774	8,012
Additions to property, plant and equipment:
Total additions to property, plant and equipment									24,562	25,305	16,300
Assets
Total assets	1,728,373				1,680,860				1,728,373	1,680,860	1,031,104
Continuing Operations
Assets
Total assets	1,728,373				1,680,860				1,728,373	1,680,860	811,696
Discontinued Operations
Assets
Total assets	0				0				0	0	219,408
Television
Segment operating revenues:
Total operating revenues									802,134	609,551	466,965
Segment profit (loss):
Operating Income (Loss)									249,268	139,797	136,319
Depreciation:
Total depreciation									30,184	29,685	21,676
Amortization of intangibles:
Total amortization of intangibles									16,958	14,607	7,092
Additions to property, plant and equipment:
Total additions to property, plant and equipment									21,064	20,988	13,039
Assets
Total assets	1,248,808				1,251,733				1,248,808	1,251,733	509,652
Radio
Segment operating revenues:
Total operating revenues									70,860	58,881	0
Segment profit (loss):
Operating Income (Loss)									12,797	12,837	0
Depreciation:
Total depreciation									2,317	1,366	0
Amortization of intangibles:
Total amortization of intangibles									1,060	795	0
Additions to property, plant and equipment:
Total additions to property, plant and equipment									2,037	2,317	0
Assets
Total assets	146,175				147,579				146,175	147,579	0
Digital
Segment operating revenues:
Total operating revenues									62,076	38,928	22,881
Segment profit (loss):
Operating Income (Loss)									(16,358)	(17,103)	(22,828)
Depreciation:
Total depreciation									164	525	413
Amortization of intangibles:
Total amortization of intangibles									4,419	2,034	920
Additions to property, plant and equipment:
Total additions to property, plant and equipment									54	66	208
Assets
Total assets	148,994				103,432				148,994	103,432	41,034
Syndication and other
Segment operating revenues:
Total operating revenues									7,977	8,296	8,906
Segment profit (loss):
Operating Income (Loss)									(801)	(1,074)	(1,499)
Depreciation:
Total depreciation									263	258	119
Additions to property, plant and equipment:
Total additions to property, plant and equipment									124	83	1,127
Assets
Total assets	7,954				7,794				7,954	7,794	3,101
Shared services and corporate
Segment profit (loss):
Operating Income (Loss)									(44,222)	(43,619)	(41,772)
Depreciation:
Total depreciation									1,863	2,344	1,960
Amortization of intangibles:
Total amortization of intangibles									1,353	338	0
Additions to property, plant and equipment:
Total additions to property, plant and equipment									1,283	1,851	1,926
Assets
Total assets	$ 176,442				$ 170,322				$ 176,442	$ 170,322	$ 257,909