Segment Information - EBITDA Reconciliation (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Segment Information
Net (loss) income attributable to controlling interests and available to common shareholders	$ 15,954	$ (175,561)	$ 15,158	$ (901)	$ 24,969	$ 27,490	$ 20,148	$ 15,384	$ (145,350)	$ 87,991	$ 67,080
Interest expense, net									35,036	17,360	19,451
Amortization of deferred financing costs and note discount									12,574	11,529	11,363
Income tax (benefit) expense									(9,292)	26,622	39,342
Depreciation and accretion expense									122,036	90,953	85,030
Amortization of intangible assets									57,866	36,822	38,799
EBITDA									72,870	271,277	261,065
Loss (gain) on disposal and impairment of assets									33,275	81	(14,010)
Other expense									3,524	2,958	3,780
Noncontrolling interests									(25)	(67)	(996)
Share-based compensation expense									14,395	21,430	19,421
Acquisition and divestiture-related expenses									18,917	9,513	27,127
Goodwill and intangible asset impairment									194,521
Redomicile-related expenses									782	13,747
Restructuring expenses	$ 2,200			$ 8,200					10,354
Adjusted EBITDA									348,613	318,939	296,387
Depreciation and accretion expense									122,029	90,927	84,608
Adjusted EBITA									$ 226,584	$ 228,012	$ 211,779