DISCONTINUED OPERATIONS (Details) $ in Thousands	3 Months Ended								12 Months Ended
	Apr. 30, 2018 USD ($)	Jan. 31, 2018 USD ($)	Oct. 31, 2017 USD ($)	Jul. 31, 2017 USD ($)	Apr. 30, 2017 USD ($)	Jan. 31, 2017 USD ($)	Oct. 31, 2016 USD ($)	Jul. 31, 2016 USD ($)	Apr. 30, 2018 USD ($) property	Apr. 30, 2017 USD ($) property	Apr. 30, 2016 USD ($) property
Revenues [Abstract]
TOTAL REVENUE	$ 44,185	$ 42,716	$ 41,866	$ 40,978	$ 42,811	$ 39,797	$ 39,195	$ 38,301	$ 169,745	$ 160,104	$ 145,500
EXPENSES
Property operating expenses, excluding real estate taxes									54,292	47,587	43,741
Real estate taxes									18,742	16,739	14,407
Depreciation and amortization									82,070	44,253	39,273
Impairment of real estate investments									18,065	57,028	5,543
TOTAL EXPENSES									193,449	190,214	121,244
Operating income									(23,704)	(30,110)	24,256
Interest expense									(34,178)	(34,314)	(28,417)
Gain (loss) on extinguishment of debt									(940)	(1,651)	(106)
Interest income									1,197	366	78
Other income									311	780	307
Gain on sale of discontinued operations									183,687	74,847	33,423
INCOME FROM DISCONTINUED OPERATIONS									164,823	76,753	67,420
Property Sale Data
Gain on sale of discontinued operations									$ 183,687	$ 74,847	33,423
Discontinued Operations [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of real estate properties classified as discontinued operations | property									27	0
Revenues [Abstract]
Real estate rentals									$ 19,744	$ 43,984	69,623
EXPENSES
Property operating expenses, excluding real estate taxes									6,350	9,051	17,470
Real estate taxes									5,191	6,848	11,611
Depreciation and amortization									8,445	10,772	24,725
Impairment of real estate investments									0	0	440
TRS senior housing expenses									0	3,113	3,366
TOTAL EXPENSES									20,192	30,358	59,569
Operating income									11,202	32,954	37,443
Interest expense									(4,172)	(11,628)	(25,757)
Gain (loss) on extinguishment of debt									(6,508)	(3,238)	29,336
Interest income									661	2,179	2,179
Other income									73	340	437
Income from discontinued operations before gain on sale									1,256	20,607	43,638
Gain on sale of discontinued operations									163,567	56,146	23,782
INCOME FROM DISCONTINUED OPERATIONS									164,823	76,753	67,420
Default interest											4,700
Non-recourse loan											122,600
Gain on extinguishment of debt from transfer of ownership											$ 36,500
Number of loan properties | property											9
Property Sale Data
Sales price									437,652	239,436	$ 373,460
Net book value and sales costs									(274,085)	(183,290)	(349,678)
Gain on sale of discontinued operations									163,567	56,146	23,782
Discontinued Operations [Member] | All Other [Member]
EXPENSES
INCOME FROM DISCONTINUED OPERATIONS									164,823	$ 76,753	$ 67,420
Discontinued Operations, Disposed of by Sale [Member] | Office [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of real estate properties classified as discontinued operations | property											48
Discontinued Operations, Disposed of by Sale [Member] | Retail Site [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of real estate properties classified as discontinued operations | property											17
Discontinued Operations, Disposed of by Sale [Member] | Commercial Healthcare [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of real estate properties classified as discontinued operations | property											1
Discontinued Operations, Disposed of by Sale [Member] | Senior Housing Properties [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of real estate properties disposed | property										32
Discontinued Operations, Held-for-sale [Member] | Senior Housing Properties [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of properties classified as held for sale | property											34
Tenant Reimbursement [Member] | Discontinued Operations [Member]
Revenues [Abstract]
TOTAL REVENUE									11,650	$ 16,110	$ 23,434
TRS Senior Housing [Member] | Discontinued Operations [Member]
Revenues [Abstract]
TOTAL REVENUE									0	3,218	3,955
Real Estate [Member]
EXPENSES
Cost of revenue									73,034	64,326	58,148
Real Estate [Member] | Discontinued Operations [Member]
Revenues [Abstract]
TOTAL REVENUE									31,394	63,312	97,012
Management Service [Member]
EXPENSES
Cost of revenue									5,526	5,046	3,714
Management Service [Member] | Discontinued Operations [Member]
EXPENSES
Cost of revenue									$ 206	$ 574	$ 1,957