COMMON STOCK AND SHARE-BASED COMPENSATION (Performance Shares) (Details) - Performance shares - $ / shares	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Number of Performance Shares
Nonvested (in shares)	1,438,091
Granted (in shares)	130,251
Vested (in shares)	(255,324)
Forfeited (in shares)	(624,595)
Nonvested (in shares)	688,423	1,438,091
Weighted Average Grant- Date Fair Value
Nonvested (ins dollars per share)	$ 56.32
Granted (in dollars per share)	15.39	$ 36.92	$ 77.00
Vested (in dollars per share)	40.74
Forfeited (in dollars per share)	75.54
Nonvested (in dollars per share)	$ 36.92	$ 56.32