INCOME (LOSS) PER SHARE - Schedule of Weighted-Average Potentially Dilutive Instruments (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Income (loss) from continuing operations	$ 79,208	$ (14,685)	$ (37,645)	$ (41,170)	$ 49,862	$ 47,175	$ (92,254)	$ (2,795)	$ (14,292)	$ 1,988	$ 28,601
Net income attributable to noncontrolling interests									10,682
Net income (loss) attributable to common stockholders - continuing operations									(24,974)
Income (loss) from discontinued operations, net of tax	435	0	0	2,162	0	0	0	0	2,597	0	(1,974)
Net income (loss) attributable to parent	$ 77,041	$ (16,685)	$ (40,246)	$ (42,487)	$ 46,228	$ 44,615	$ (95,034)	$ (6,888)	$ (22,377)	$ (11,079)	$ 14,040
Weighted-average common shares outstanding (in shares)									567,408,340	566,511,108	559,367,075
Weighted Average Number of Shares Outstanding, Diluted									567,408,340	566,511,108	568,418,371
Continuing operations (in usd per share)	$ 0.14	$ (0.03)	$ (0.07)	$ (0.08)	$ 0.08	$ 0.08	$ (0.17)	$ (0.01)	$ (0.04)	$ (0.02)	$ 0.03
Income (Loss) from Continuing Operations, Per Diluted Share	0.13	(0.03)	(0.07)	(0.08)	0.08	0.08	(0.17)	(0.01)	(0.04)	(0.02)	0.03
Discontinued operations (in usd per share)	0.00	0	0	0.01	0	0	0	0	0.00	0	0.00
Discontinued Operation, Income (Loss) from Discontinued Operation, Net of Tax, Per Diluted Share	0.00	0	0	0.01	0	0	0	0	$ 0.00	$ 0	$ (0.01)
Antidilutive securities excluded from computation of earnings per share (in shares)									128,143,892	125,185,727	100,693,145
Earnings Per Share, Diluted	0.13	(0.03)	(0.07)	(0.07)	0.08	0.08	(0.17)	(0.01)	$ (0.04)	$ (0.02)	$ 0.02
Basic net income (loss) per share (in usd per share)	$ 0.14	$ (0.03)	$ (0.07)	$ (0.07)	$ 0.08	$ 0.08	$ (0.17)	$ (0.01)	$ (0.04)	$ (0.02)	$ 0.03
Common Class A [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Income (loss) from continuing operations										$ 1,988	$ 28,601
Net income attributable to noncontrolling interests										13,067	12,587
Net income (loss) attributable to common stockholders - continuing operations										(11,079)	16,014
Income (loss) from discontinued operations, net of tax										0	(1,974)
Net income (loss) attributable to parent										$ (11,079)	$ 14,040
Restricted Stock Units (RSUs)
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share (in shares)									33,040,043	30,552,028	8,087,545
Other stock-based compensation awards
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share (in shares)									2,511,249	2,041,099	13,000
Convertible Debt [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share (in shares)									46,296,300	46,296,300	46,296,300
Warrants
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share (in shares)									46,296,300	46,296,300	46,296,300
Market-based Performance Share Units [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number	6,820,041				0				6,820,041	0