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	(50,467)			(50,112)	(256)	(99)
Issuance of common stock	2	4	(2)
Amortization of restricted stock units	6,047		6,047
Acquisition of non-controlling interests	(2,000)		(1,126)			(874)
Balance at Jun. 30, 2018	975,526	26	1,064,039	(89,378)	(403)	1,242
Balance at Mar. 31, 2018	985,481	24	1,061,983	(78,438)	(446)	2,358
Total comprehensive loss	(11,139)			(10,940)	43	(242)
Issuance of common stock		2	(2)
Amortization of restricted stock units	3,184		3,184
Acquisition of non-controlling interests	(2,000)		(1,126)			(874)
Balance at Jun. 30, 2018	975,526	26	1,064,039	(89,378)	(403)	1,242
Balance at Dec. 31, 2018	1,144,923	37	1,352,388	(210,783)	2,194	1,087
Total comprehensive loss	(36,839)			(37,690)		851
Issuance of common stock from exercise of warrants	2	1	1
Amortization/cancellation of restricted stock units	7,453		7,453
Balance at Jun. 30, 2019	1,115,539	38	1,359,842	(248,473)	2,194	1,938
Balance at Mar. 31, 2019	1,127,685	37	1,356,436	(232,514)	2,194	1,532
Total comprehensive loss	(15,553)			(15,959)		406
Issuance of common stock from exercise of warrants	1	1
Amortization/cancellation of restricted stock units	3,406		3,406
Balance at Jun. 30, 2019	$ 1,115,539	$ 38	$ 1,359,842	$ (248,473)	$ 2,194	$ 1,938