SEGMENTS (Details) - USD ($) $ in Thousands	2 Months Ended	3 Months Ended										8 Months Ended	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Oct. 31, 2018	Jul. 31, 2018	Apr. 30, 2018	Jan. 31, 2018	Oct. 31, 2017	Jul. 31, 2017	Dec. 31, 2018	Dec. 31, 2019	Apr. 30, 2018	Apr. 30, 2017
Segment Reporting Information, Profit (Loss) [Abstract]
REVENUE	$ 30,287	$ 45,777	$ 47,436	$ 46,934	$ 45,608	$ 45,638	$ 45,946	$ 44,185	$ 42,716	$ 41,866	$ 40,978	$ 121,871	$ 185,755	$ 169,745	$ 160,104
Costs and Expenses												116,786	174,338	193,449	190,214
Operating income (loss)												5,085	11,417	(23,704)	(30,110)
Casualty loss												(915)	(1,116)	(500)	(414)
Depreciation and amortization												(50,456)	(74,271)	(82,070)	(44,253)
General and administrative expenses												(9,812)	(14,450)	(14,203)	(15,871)
Acquisition and investment related costs												0	0	(51)	(3,276)
Interest expense												(21,359)	(30,537)	(34,178)	(34,314)
Gain (loss) on extinguishment of debt												(556)	(2,360)	(940)	(1,651)
Interest and other income												1,233	2,092	1,508	1,146
Income (loss) before gain (loss) on sale of real estate and other investments, gain (loss) on litigation settlement, and income (loss) from discontinued operations												(15,597)	(19,388)	(57,314)	(64,929)
Gain (loss) on sale of real estate and other investments												9,707	97,624	20,120	18,701
Gain (loss) on litigation settlement												0	6,586	0	0
Income (loss) from continuing operations												(5,890)	84,822	(37,194)	(46,228)
Income (loss) from discontinued operations												570	0	164,823	76,753
NET INCOME (LOSS)												(5,320)	84,822	127,629	30,525
Segment assets
Property owned	1,643,078	1,643,078						1,669,764				1,627,636	1,643,078	1,669,764
Less accumulated depreciation	(349,122)	(349,122)						(311,324)				(353,871)	(349,122)	(311,324)
Total property owned	1,293,956	1,293,956						1,358,440				1,273,765	1,293,956	1,358,440
Cash and cash equivalents	26,579	26,579						11,891				13,792	26,579	11,891
Restricted cash	19,538	19,538						4,225				5,464	19,538	4,225
Other assets	34,829	34,829						30,297				27,265	34,829	30,297
Unimproved land	1,376	1,376						11,476				5,301	1,376	11,476
Mortgage loans receivable	16,140	16,140						10,329				10,410	16,140	10,329
TOTAL ASSETS	1,392,418	1,392,418						1,426,658				1,335,997	1,392,418	1,426,658
Operating Segments
Segment Reporting Information, Profit (Loss) [Abstract]
REVENUE												121,871	185,755	169,745	160,104
Costs and Expenses												50,719	78,315	73,034	64,326
Operating income (loss)												71,152	107,440	96,711	95,778
Segment Reconciling Items
Segment Reporting Information, Profit (Loss) [Abstract]
Casualty loss												(915)	(1,116)	(500)	(414)
Depreciation and amortization												(50,456)	(74,271)	(82,070)	(44,253)
Impairment of real estate investments												(1,221)		(18,065)	(57,028)
General and administrative expenses												(9,812)	(14,450)	(14,203)	(15,871)
Acquisition and investment related costs														(51)	(3,276)
Multifamily
Segment assets
Property owned	1,609,471	1,609,471						1,606,421				1,428,226	1,609,471	1,606,421
Less accumulated depreciation	(339,272)	(339,272)						(294,477)				(277,709)	(339,272)	(294,477)
Total property owned	1,270,199	1,270,199						1,311,944				1,150,517	1,270,199	1,311,944
Multifamily | Operating Segments
Segment Reporting Information, Profit (Loss) [Abstract]
REVENUE												100,136	161,434	159,983	142,214
Costs and Expenses												41,391	67,186	70,460	60,895
Operating income (loss)												58,745	94,248	89,523	81,319
All Other
Segment assets
Property owned	33,607	33,607						63,343				199,410	33,607	63,343
Less accumulated depreciation	(9,850)	(9,850)						(16,847)				(76,162)	(9,850)	(16,847)
Total property owned	$ 23,757	$ 23,757						$ 46,496				123,248	23,757	46,496
All Other | Operating Segments
Segment Reporting Information, Profit (Loss) [Abstract]
REVENUE												21,735	24,321	9,762	17,890
Costs and Expenses												9,328	11,129	2,574	3,431
Operating income (loss)												12,407	13,192	7,188	14,459
Management Service
Segment Reporting Information, Profit (Loss) [Abstract]
Property management expenses												(3,663)	(6,186)	(5,526)	(5,046)
Management Service | Segment Reconciling Items
Segment Reporting Information, Profit (Loss) [Abstract]
Property management expenses												$ (3,663)	$ (6,186)	$ (5,526)	$ (5,046)