RELATED PARTY TRANSACTIONS - Additional Information (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2018 USD ($)	Mar. 31, 2017 USD ($)	Dec. 31, 2017 USD ($)
Related Party Transaction [Line Items]
Ratio of percentage of stockholders' equity	0.000875
Ratio of independent directors or holders of a majority of the outstanding shares	0.0066666667
Compensation and management fee	$ 44,529	$ 39,262
Management Agreement
Related Party Transaction [Line Items]
Compensation and management fee	44,500	$ 39,300
Management fee payable	$ 14,500		$ 13,800
Renewal term	2 years
Management Agreement | Minimum
Related Party Transaction [Line Items]
Management agreement, required period to terminate from the date of the notice	1 year