SHARE-BASED COMPENSATION Restricted Shares (Details) - Restricted stock	3 Months Ended
	Mar. 31, 2020 $ / shares shares
Number of non-vested restricted shares
Balance at December 31, 2019 (in shares) | shares	873,087
Granted (in shares) | shares	451,353
Vested (in shares) | shares	(95,848)
Balance at March 31, 2020 (in shares) | shares	1,209,891
Weighted average grant date fair value
Balance at December 31, 2019 (in dollars per share)	$ 12.83
Granted (in dollars per share)	6.72
Vested (in dollars per share)	21.65
Forfeited (in dollars per share)	12.78
Balance at March 31, 2020 (in dollars per share)	$ 9.85