EARNINGS PER SHARE - (Details) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
EARNINGS PER SHARE
Net loss available for stockholders :	$ (9,662)	$ (160,423)
Less: Adjustments for earnings attributable to participating securities	0	0
Net loss used in calculating earnings per share	$ (9,662)	$ (160,423)
Weighted average shares outstanding (including participating securities)	215,538	215,007
Adjustment for participating securities	(2,579)	(2,696)
Shares used in calculating basic and diluted earnings per share	212,959	212,311