INCOME TAXES - Preliminary Taxability of Distributions on Common Shares (Detail)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Ordinary income	36.34%	33.53%	33.05%
Non-taxable return of capital	59.83%	60.55%	52.10%
Long-term capital gain	3.83%	5.92%	14.85%
Total distribution (in dollars per share)	100.00%	100.00%	100.00%