CONDENSED CONSOLIDATED STATEMENTS OF EQUITY (Unaudited) - USD ($) $ in Thousands	Total	Common stock	Additional paid-in capital	Accumulated deficit	Accumulated other comprehensive loss	Non controlling interest
Balance at Dec. 31, 2017	$ 1,021,944	$ 22	$ 1,059,120	$ (39,266)	$ (147)	$ 2,215
Total comprehensive loss	(81,650)			(81,008)	(256)	(386)
Issuance of common stock	3	5	(2)
Amortization of restricted stock units	5,611		5,611
Acquisition of non-controlling interests	(2,000)		(1,126)			(874)
Balance at Sep. 30, 2018	943,908	27	1,063,603	(120,274)	(403)	955
Balance at Jun. 30, 2018	975,526	26	1,064,039	(89,378)	(403)	1,242
Total comprehensive loss	(31,183)			(30,896)		(287)
Issuance of common stock	1	1
Amortization of restricted stock units	(436)		(436)
Balance at Sep. 30, 2018	943,908	27	1,063,603	(120,274)	(403)	955
Balance at Dec. 31, 2018	1,144,923	37	1,352,388	(210,783)	2,194	1,087
Total comprehensive loss	(80,645)			(81,890)		1,245
Issuance of common stock from exercise of warrants	2	2
Amortization/cancellation of restricted stock units	13,484		13,484
Balance at Sep. 30, 2019	1,077,764	39	1,365,872	(292,673)	2,194	2,332
Balance at Jun. 30, 2019	1,115,539	38	1,359,842	(248,473)	2,194	1,938
Total comprehensive loss	(43,806)			(44,200)		394
Issuance of common stock from exercise of warrants		1	(1)
Amortization/cancellation of restricted stock units	6,031		6,031
Balance at Sep. 30, 2019	$ 1,077,764	$ 39	$ 1,365,872	$ (292,673)	$ 2,194	$ 2,332