DEBT - Interest Rates (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Interest rates on debt
Effective Interest Rate (as a percent)	5.42%	4.47%	5.24%	4.40%
Minimum
Interest rates on debt
Range of Interest Rates (excluding unused commitment fees)	3.65%	3.13%	3.36%	2.69%
Maximum
Interest rates on debt
Range of Interest Rates (excluding unused commitment fees)	7.46%	6.96%	7.46%	6.96%