COMBINED CONSOLIDATED STATEMENTS OF EQUITY - USD ($) $ in Thousands	Common Stock	Additional Paid-in Capital	Net Parent Investment	Accumulated Deficit	Total shareholders' equity	Noncontrolling interests	Total
Balance at Dec. 31, 2015			$ 5,087,494		$ 5,087,494		$ 5,087,494
Increase (decrease) in parent company equity
Net (loss) income			185,875		185,875		185,875
Net distributions to parent			(413,404)		(413,404)		(413,404)
Balance at Sep. 30, 2016			$ 4,859,965		4,859,965		4,859,965
Balance at Dec. 31, 2016	$ 936	$ 3,163,954		$ (130,094)	3,034,796	$ 497	3,035,293
Increase (decrease) in parent company equity
Net (loss) income				(382,776)	(382,776)	61	(382,715)
Stock-based compensation	2	5,836			5,838		5,838
Distributions on preferred shares		(235)			(235)	(61)	(296)
Balance at Sep. 30, 2017	$ 938	$ 3,169,555		$ (512,870)	$ 2,657,623	$ 497	$ 2,658,120