DISTRIBUTIONS (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended												12 Months Ended
	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Class of Stock [Line Items]
Percentage of taxable income required for REIT distribution	90.00%												90.00%
Declared daily distribution rate, before adjustment for class-specific expenses (usd per share)	$ 0.22493054	$ 0.22499034	$ 0.21749364	$ 0.20785050	$ 0.19804288	$ 0.19181264	$ 0.18261880	$ 0.17734500	$ 0.18045340	$ 0.17696108	$ 0.17763473	$ 0.18070416
Distributions paid or payable in cash	$ 2,095	$ 2,140	$ 2,217	$ 2,020	$ 1,841	$ 1,703	$ 1,526	$ 1,337	$ 1,342	$ 1,303	$ 1,330	$ 1,369	$ 8,472	$ 6,407	$ 5,344
Distributions reinvested	2,479	2,410	2,464	2,210	1,950	1,668	1,429	1,374	1,411	1,377	1,355	1,339	9,563	6,421	5,482
Distributions declared	4,574	4,550	4,681	4,230	3,791	3,371	2,955	2,711	2,753	2,680	2,685	2,708	18,035	12,828	10,826
Common Stock
Class of Stock [Line Items]
Distributions reinvested													$ 5	$ 4	$ 4
Stock issued during period, dividend reinvestment plan (in shares)													556,592	415,624	383,881
Class A
Class of Stock [Line Items]
Distributions declared	$ 790	$ 786	$ 837	$ 786	$ 728	$ 672	$ 617	$ 601	$ 605	$ 594	$ 611	$ 643	$ 3,199	$ 2,618	$ 2,453
Class A | Common Stock
Class of Stock [Line Items]
Stock issued during period, dividend reinvestment plan (in shares)	28,157	27,308	28,747	27,036	25,992	25,173	23,507	23,374	23,876	23,778	24,380	25,107	111,248	98,046	97,141
Class I
Class of Stock [Line Items]
Distributions declared	$ 2,677	$ 2,726	$ 2,853	$ 2,610	$ 2,409	$ 2,242	$ 2,031	$ 1,933	$ 1,952	$ 1,889	$ 1,875	$ 1,866	$ 10,866	$ 8,615	$ 7,582
Class I | Common Stock
Class of Stock [Line Items]
Stock issued during period, dividend reinvestment plan (in shares)	78,213	76,719	80,232	75,809	72,519	71,425	66,872	66,027	69,727	68,581	67,373	63,595	310,973	276,843	269,276
Class T
Class of Stock [Line Items]
Distributions declared	$ 67	$ 80	$ 121	$ 139	$ 171	$ 172	$ 163	$ 159	$ 164	$ 162	$ 164	$ 163	$ 407	$ 665	$ 653
Class T | Common Stock
Class of Stock [Line Items]
Stock issued during period, dividend reinvestment plan (in shares)	1,840	1,852	2,114	2,447	3,138	3,352	3,377	3,832	4,336	4,371	4,451	4,177	8,253	13,699	17,335
Class D
Class of Stock [Line Items]
Distributions declared	$ 722	$ 679	$ 666	$ 540	$ 423	$ 253	$ 127	$ 9	$ 30	$ 35	$ 35	$ 36	$ 2,607	$ 812	$ 136
Class D | Common Stock
Class of Stock [Line Items]
Stock issued during period, dividend reinvestment plan (in shares)	30,040	26,490	25,795	20,428	15,323	6,105	370	643	4	0	0	0	102,753	22,441	4
Class N
Class of Stock [Line Items]
Distributions declared	$ 146	$ 137	$ 103	$ 74	$ 25	$ 16	$ 13	$ 9	$ 2	$ 0	$ 0	$ 0	$ 460	$ 63	$ 2
Class N | Common Stock
Class of Stock [Line Items]
Stock issued during period, dividend reinvestment plan (in shares)	2,304	2,211	2,141	1,565	951	798	627	476	125	0	0	0	8,221	2,852	125
Class M-I
Class of Stock [Line Items]
Distributions declared	$ 72	$ 61	$ 44	$ 36	$ 18	$ 10	$ 4	$ 0					$ 213	$ 32
Class M-I | Common Stock
Class of Stock [Line Items]
Stock issued during period, dividend reinvestment plan (in shares)	2,716	2,378	1,614	1,224	578	414	205	0					7,932	1,197
Class T2
Class of Stock [Line Items]
Distributions declared	$ 83	$ 64	$ 39	$ 28	$ 16	$ 6	$ 0	$ 0					$ 214	$ 22
Class T2 | Common Stock
Class of Stock [Line Items]
Stock issued during period, dividend reinvestment plan (in shares)	3,012	2,138	1,177	885	402	142	2	0					7,212	546
Class Z
Class of Stock [Line Items]
Distributions declared	$ 17	$ 17	$ 18	$ 17	$ 1	$ 0	$ 0	$ 0					$ 69	$ 1
Class Z | Common Stock
Class of Stock [Line Items]
Stock issued during period, dividend reinvestment plan (in shares)					0	0	0	0						0