Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Income Statement [Abstract]
Revenues	$ 536,932	$ 524,080	$ 1,053,685	$ 1,026,170
Operating expenses:
Cost of revenues, exclusive of depreciation	285,293	264,294	566,604	522,787
Business units - Selling, general and administrative expenses, exclusive of depreciation	73,941	78,933	145,406	152,554
Corporate - General and administrative expenses, exclusive of depreciation	15,836	11,221	30,571	23,929
Depreciation	14,533	13,861	29,450	27,332
Amortization of intangible assets	8,823	7,962	17,512	14,744
Spectrum repacking reimbursements and other	(4,306)	(6,326)	(11,319)	(6,326)
Total	394,120	369,945	778,224	735,020
Operating income	142,812	154,135	275,461	291,150
Non-operating income (expense):
Equity (loss) income in unconsolidated investments, net	(615)	15,547	11,413	14,309
Interest expense	(46,327)	(49,104)	(92,712)	(96,829)
Other non-operating items, net	8,964	(311)	7,425	(12,791)
Total	(37,978)	(33,868)	(73,874)	(95,311)
Income before income taxes	104,834	120,267	201,587	195,839
Provision for income taxes	24,879	27,755	47,653	48,140
Net income	$ 79,955	$ 92,512	$ 153,934	$ 147,699
Net income per share – basic (In dollars per share)	$ 0.37	$ 0.43	$ 0.71	$ 0.68
Net income per share – diluted (In dollars per share)	$ 0.37	$ 0.43	$ 0.71	$ 0.68
Weighted average number of common shares outstanding:
Basic shares (in shares)	217,089	216,342	216,900	216,309
Diluted shares (in shares)	217,905	216,515	217,555	216,753