EARNINGS (LOSS) PER SHARE - (Details) - shares shares in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Reconciliation of weighted average shares outstanding from basic to diluted
Weighted average shares outstanding - basic	86,567	49,753	49,543	49,114	49,232	49,402	49,423	49,484	58,822	49,385	49,560
Potential dilutive common shares									0	0	0
Weighted average shares outstanding - diluted	86,567	50,131	49,543	49,114	49,232	49,402	49,423	49,484	58,822	49,385	49,560
Common stock and unvested shares of restricted stock not included because their effect would have been antidilutive (in shares)									2,500	8,000	8,200