CONDENSED CONSOLIDATED STATEMENTS OF EQUITY (Unaudited) - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Retained Earnings	Accumulated other comprehensive income (loss)	Noncontrolling Interest
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
Balance at Dec. 31, 2019	1,016,410	40	1,367,521	(352,526)	(236)	1,611
Total comprehensive loss	(128,371)			(129,068)	817	(120)
Adoption of credit loss accounting standard	(163)			(163)
Amortization/cancellation of restricted stock units	2,124		2,124
Balance at Jun. 30, 2020	890,000	40	1,369,645	(481,757)	581	1,491
Balance at Mar. 31, 2020	998,896	40	1,368,325	(371,134)	133	1,532
Total comprehensive loss	(110,216)			(110,623)	448	(41)
Amortization/cancellation of restricted stock units	1,320		1,320
Balance at Jun. 30, 2020	$ 890,000	$ 40	$ 1,369,645	$ (481,757)	$ 581	$ 1,491