Earnings (Losses) Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Net income (loss) (numerator):
Income (loss) from continuing operations, net of tax	$ (97,839)	$ (250,879)	$ (681,048)	$ (168,407)
Less: net (income) loss attributable to noncontrolling interest	(1,185)	320	990	453
Less: (earnings) losses allocated to unvested shareholders	2,698	5,834	14,683	4,523
Adjusted income (loss) from continuing operations, net of tax - basic	(96,326)	(244,725)	(665,375)	(163,431)
Income (loss) from discontinued operations, net of tax	$ (12,187)	$ (45,275)	$ (14,097)	$ (41,067)
Weighted-average number of shares outstanding - basic	276,707	284,112	276,369	285,186
Earnings (losses) Per Share - Basic
Basic from continuing operations (in dollars per share)	$ (0.35)	$ (0.86)	$ (2.41)	$ (0.57)
Basic from discontinued operations (in dollars per share)	(0.04)	(0.16)	(0.05)	(0.15)
Total Basic (in dollars per share)	$ (0.39)	$ (1.02)	$ (2.46)	$ (0.72)
DILUTED EPS:
Adjusted income (loss) from continuing operations, net of tax - basic	$ (96,326)	$ (244,725)	$ (665,375)	$ (163,431)
Adjusted income (loss) from continuing operations, net of tax - diluted	(96,326)	(244,725)	(665,375)	(163,431)
Income (loss) from discontinued operations, net of tax	$ (12,187)	$ (45,275)	$ (14,097)	$ (41,067)
Weighted-average number of shares outstanding - basic	276,707	284,112	276,369	285,186
Weighted-average number of shares outstanding - diluted	276,707	284,112	276,369	285,186
Earnings (losses) per share:
Diluted from continuing operations (in dollars per share)	$ (0.35)	$ (0.86)	$ (2.41)	$ (0.57)
Diluted from discontinued operations (in dollars per share)	(0.04)	(0.16)	(0.05)	(0.15)
Total Diluted (in dollars per share)	$ (0.39)	$ (1.02)	$ (2.46)	$ (0.72)