Condensed Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Income Statement [Abstract]
Revenues	$ 900,510	$ 665,582	$ 1,744,666	$ 1,308,756
Costs and operating expenses:
Cost of revenues	456,967	315,757	884,647	614,070
Sales and marketing	107,832	81,248	214,422	159,864
General and administrative	168,462	119,578	334,366	233,218
Acquisition costs	15,594	9,866	52,130	11,022
Gains on asset sales	0	0	(5,242)	0
Total costs and operating expenses	748,855	526,449	1,480,323	1,018,174
Income from continuing operations	151,655	139,133	264,343	290,582
Interest income	841	921	1,766	1,441
Interest expense	(100,332)	(74,496)	(201,195)	(143,287)
Other income (expense)	1,555	1,386	(59,155)	872
Loss on debt extinguishment	(605)	0	(605)	0
Income from continuing operations before income taxes	53,114	66,944	5,154	149,608
Income tax expense	(13,812)	(7,485)	(3,179)	(13,697)
Net income from continuing operations	39,302	59,459	1,975	135,911
Net income from discontinued operations, net of tax	5,409	0	11,625	0
Net income	$ 44,711	$ 59,459	$ 13,600	$ 135,911
Earnings per share (“EPS”):
Basic EPS from continuing operations (in dollars per share)	$ 0.56	$ 1.04	$ 0.03	$ 2.39
Basic EPS from discontinued operations (in dollars per share)	0.08	0.00	0.17	0.00
Basic EPS (in dollars per share)	$ 0.64	$ 1.04	$ 0.20	$ 2.39
Weighted-average shares	69,729	56,935	68,931	56,798
Diluted EPS from continuing operations (in dollars per share)	$ 0.56	$ 1.03	$ 0.03	$ 2.37
Diluted EPS from discontinued operations (in dollars per share)	0.08	0.00	0.17	0.00
Diluted EPS (in dollars per share)	$ 0.64	$ 1.03	$ 0.20	$ 2.37
Weighted-average shares for diluted EPS	70,364	57,499	69,575	57,410