Condensed Consolidated Statements of Operations (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Revenue (less agency commissions)	$ 250,344	$ 226,681	$ 476,602	$ 430,142
Operating expenses before depreciation, amortization and loss (gain) on disposal of assets, net:
Broadcast	141,919	133,683	291,573	267,239
Corporate and administrative	10,833	8,432	19,093	16,142
Depreciation	13,543	12,841	27,237	25,470
Amortization of intangible assets	5,153	6,657	10,589	12,224
Gain on disposals of assets, net	(794)	(77,326)	(1,615)	(76,799)
Operating expenses	170,654	84,287	346,877	244,276
Operating income	79,690	142,394	129,725	185,866
Other income (expense):
Miscellaneous income, net	702	162	1,262	255
Interest expense	(24,831)	(23,791)	(49,081)	(46,982)
Loss from early extinguishment of debt		(311)		(2,851)
Income before income taxes	55,561	118,454	81,906	136,288
Income tax expense	14,856	47,893	21,256	55,222
Net income	$ 40,705	$ 70,561	$ 60,650	$ 81,066
Basic per share information:
Net income (in dollars per share)	$ 0.46	$ 0.98	$ 0.69	$ 1.13
Weighted-average shares outstanding (in shares)	87,765	71,821	88,408	71,849
Diluted per share information:
Net income (in dollars per share)	$ 0.46	$ 0.97	$ 0.68	$ 1.12
Weighted-average shares outstanding (in shares)	88,305	72,501	88,937	72,510
Dividends declared per common share (in dollars per share)	$ 0	$ 0