GOODWILL AND OTHER INTANGIBLE ASSETS - Summary of Changes in Goodwill (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2018 USD ($)
Goodwill [Roll Forward]
Balance at beginning of period	$ 1,585
Impairment of goodwill	(1,585)
Balance at end of period	0
Corporate Entity and Other Business Units
Goodwill [Roll Forward]
Balance at beginning of period	1,585
Impairment of goodwill	(1,585)
Balance at end of period	$ 0