EQUITY - Summary of Stockholder Share Activity (in shares) (Details)	6 Months Ended
	Jun. 30, 2018 shares
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Shares outstanding, beginning of period	48,497,942
Shares issued under stock incentive plan, net of awards surrendered to pay applicable taxes	194,641
Shares issued to Board of Directors in lieu of cash	1,838
Shares outstanding, end of period	48,694,421