Condensed Consolidated Statements of Operations (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Revenue (less agency commissions)	$ 279,310	$ 218,977	$ 755,912	$ 649,119
Operating expenses before depreciation, amortization and (gain) loss on disposal of assets, net:
Broadcast	145,091	139,542	436,664	406,781
Corporate and administrative	11,041	8,330	30,134	24,472
Depreciation	13,350	13,085	40,587	38,555
Amortization of intangible assets	4,998	6,460	15,587	18,684
(Gain) loss on disposals of assets, net	(3,572)	1,660	(5,187)	(75,139)
Operating expenses	170,908	169,077	517,785	413,353
Operating income	108,402	49,900	238,127	235,766
Other income (expense):
Miscellaneous income, net	930	152	2,192	407
Interest expense	(25,104)	(24,207)	(74,185)	(71,189)
Loss from early extinguishment of debt				(2,851)
Income before income taxes	84,228	25,845	166,134	162,133
Income tax expense	22,342	10,529	43,598	65,751
Net income	$ 61,886	$ 15,316	$ 122,536	$ 96,382
Basic per share information:
Net income (in dollars per share)	$ 0.71	$ 0.21	$ 1.39	$ 1.34
Weighted-average shares outstanding (in shares)	87,765	71,636	88,191	71,777
Diluted per share information:
Net income (in dollars per share)	$ 0.70	$ 0.21	$ 1.38	$ 1.33
Weighted-average shares outstanding (in shares)	88,565	72,454	88,810	72,491
Dividends declared per common share (in dollars per share)	$ 0	$ 0