DISCONTINUED OPERATIONS, Effect on Net Income from Properties Classified as Discontinued Operations (Details) (Imported) - USD ($) $ in Thousands	3 Months Ended
	Jul. 31, 2016	Jul. 31, 2015
REVENUE [Abstract]
Real estate rentals	$ 44,985	$ 40,750
Tenant reimbursement	4,626	4,295
TOTAL REVENUE	49,611	45,045
EXPENSES [Abstract]
Property operating expenses, excluding real estate taxes	16,057	13,488
Real estate taxes	5,577	4,816
Depreciation and amortization	14,267	11,217
Impairment of real estate investments	54,153	1,285
TOTAL EXPENSES	93,555	33,684
Interest expense	(10,364)	(7,814)
Other income	473	51
INCOME FROM DISCONTINUED OPERATIONS	3,711	748
Discontinued Operations, Disposed of by Sale [Member]
REVENUE [Abstract]
Real estate rentals	5,010	18,440
Tenant reimbursement	114	6,265
TRS senior housing revenue	873	1,038
TOTAL REVENUE	5,997	25,743
EXPENSES [Abstract]
Property operating expenses, excluding real estate taxes		6,100
Real estate taxes	112	3,520
Depreciation and amortization	16	7,089
Impairment of real estate investments		440
TRS senior housing expenses	784	769
TOTAL EXPENSES	912	17,918
Operating income	5,085	7,825
Interest expense	(1,374)	(7,147)
Other income		70
INCOME FROM DISCONTINUED OPERATIONS	$ 3,711	748
Default interest		1,500
Non-recourse loan		$ 122,600