RELATED PARTY TRANSACTIONS - Summary of Fees and Expenses Incurred by Company (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Expensed:
Asset management fees	$ 23,938	$ 23,964	$ 22,470
Asset management fees related to dispositions	982	1,435	496
Other expense reimbursements	5,096	5,055	4,301
Total	30,016	30,454	27,267
Asset management fees, payable	(3)	(69)
Asset management fees related to dispositions, payable	0	0
Other expense reimbursements, payable	0	(510)
Total	(3)	(579)
Capitalized:
Acquisition fees	309	845	6,148
Development acquisition fees	2,555	1,281	778
Total	2,864	2,126	6,926
Acquisition fees, payable	0	(62)
Development acquisition fees, payable	11	(61)
Total	11	(123)
Additional Paid-In Capital:
Sales commissions	0	0	4,491
Dealer manager fees	0	0	3,026
Offering costs	557	568	4,415
Distribution fees - current	8,226	7,489	5,790
Distribution fees - trailing	0	0	0
Total	8,783	8,057	17,722
Sales commissions, payable	0	0
Dealer manager fees, payable	0	0
Offering costs, payable	0	(70)
Distribution fees - current, payable	0	(657)
Distribution fees payable to affiliates	(10,188)	(18,492)	(26,071)
Total	(10,188)	(19,219)
Advisor
Additional Paid-In Capital:
Expenses reimbursements for services	$ 4,400	$ 4,000	$ 4,000