REDEEMABLE PREFERRED STOCK - Aggregate Dividends Accumulated (Details) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended				9 Months Ended
	Dec. 31, 2017	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Class of Stock [Line Items]
Dividends Accumulated		$ 3,152			$ 0	$ 9,456	$ 0
Series L Preferred Stock
Class of Stock [Line Items]
Number of shares (in shares)	8,080,740	8,080,740	8,080,740	8,080,740		8,080,740
Dividends Accumulated	$ 1,436	$ 3,152	$ 3,152	$ 3,152