Condensed Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Income Statement [Abstract]
Revenues	$ 844,156	$ 643,174
Costs and operating expenses:
Cost of revenues	427,680	298,313
Sales and marketing	106,590	78,616
General and administrative	165,904	113,640
Acquisition costs	36,536	1,156
Gains on asset sales	(5,242)	0
Total costs and operating expenses	731,468	491,725
Income from continuing operations	112,688	151,449
Interest income	925	520
Interest expense	(100,863)	(68,791)
Other expense	(60,710)	(514)
Income (loss) from continuing operations before income taxes	(47,960)	82,664
Income tax benefit (expense)	10,633	(6,212)
Net income (loss) from continuing operations	(37,327)	76,452
Net income from discontinued operations	6,216	0
Net income (loss)	$ (31,111)	$ 76,452
Earnings (loss) per share (“EPS”):
Basic EPS from continuing operations (in dollars per share)	$ (0.55)	$ 1.35
Basic EPS from discontinued operations (in dollars per share)	0.09	0.00
Basic EPS (in dollars per share)	$ (0.46)	$ 1.35
Weighted-average shares	68,132	56,661
Diluted EPS from continuing operations (in dollars per share)	$ (0.55)	$ 1.34
Diluted EPS from discontinued operations (in dollars per share)	0.09	0.00
Diluted EPS (in dollars per share)	$ (0.46)	$ 1.34
Weighted-average shares for diluted EPS	68,132	57,227