EARNINGS PER COMMON SHARE - Anti-dilutive Securities (Details) - shares	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
EARNINGS (LOSS) PER COMMON SHARE
Total potentially dilutive securities	546,093	1,167,331
Stock Options
EARNINGS (LOSS) PER COMMON SHARE
Total potentially dilutive securities	339,199	592,714
Convertible Preferred D Shares
EARNINGS (LOSS) PER COMMON SHARE
Total potentially dilutive securities	75,850	151,700
Time Vesting Units
EARNINGS (LOSS) PER COMMON SHARE
Total potentially dilutive securities	88,333	179,990
Financial Performance Units
EARNINGS (LOSS) PER COMMON SHARE
Total potentially dilutive securities	8,069	20,840
Market Performance Units
EARNINGS (LOSS) PER COMMON SHARE
Total potentially dilutive securities		21,467
Restricted Stock Awards
EARNINGS (LOSS) PER COMMON SHARE
Total potentially dilutive securities	34,642	105,264
Maximum number of shares issuable under the Make Whole Right
EARNINGS (LOSS) PER COMMON SHARE
Total potentially dilutive securities		95,356