CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	8 Months Ended	12 Months Ended
	Dec. 31, 2018	Apr. 30, 2018	Apr. 30, 2017	Apr. 30, 2016
CASH FLOWS FROM OPERATING ACTIVITIES
Net income (loss)	$ (5,320)	$ 127,629	$ 30,525	$ 76,602
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization	51,394	83,276	46,135	41,098
Depreciation and amortization from discontinued operations	0	8,526	10,477	24,357
(Gain) loss on sale of real estate, land, other investments and discontinued operations	(10,277)	(183,687)	(74,847)	(33,423)
(Gain) loss on extinguishment of debt and discontinued operations	482	6,839	3,848	(30,135)
Gain on bargain purchase	0	0	0	(3,424)
Share-based compensation expense	845	1,587	6	2,256
Impairment of real estate investments	1,221	18,065	57,028	5,983
Other, net	629	1,457	499	651
Write off of development pursuit costs	0	0	3,161	0
Changes in other assets and liabilities:
Other assets	(1,145)	(646)	(214)	2,588
Accounts payable and accrued expenses	2,205	(7,851)	2,434	(14,292)
Net cash provided (used) by operating activities	40,034	55,195	79,052	72,261
CASH FLOWS FROM INVESTING ACTIVITIES
Principal proceeds on mortgage loan receivable	545	0	0	0
Increase in loans receivable	(918)	(15,480)	0	0
Decrease in other investments	0	0	50	279
Proceeds from sale of discontinued operations	0	426,131	237,135	365,845
Proceeds from sale of real estate and other investments	62,695	64,639	47,354	40,306
Insurance proceeds received	1,344	584	88	1,320
Payments for acquisitions of real estate assets	(977)	(374,081)	0	(121,821)
Payments for development of real estate assets	0	(2,655)	(18,274)	(122,801)
Payments for improvements of real estate assets	(11,518)	(17,980)	(41,083)	(26,904)
Payments for improvements of real estate assets from discontinued operations	0	(1,046)	(1,110)	(7,672)
Net cash provided (used) by investing activities	51,171	80,112	224,160	128,552
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from mortgages payable	0	0	84,150	143,574
Principal payments on mortgages payable	(67,016)	(205,159)	(298,984)	(241,206)
Proceeds from revolving lines of credit	53,017	370,350	246,000	82,000
Principal payments on revolving lines of credit	(119,517)	(303,400)	(206,450)	(125,000)
Proceeds from notes payable and other debt	0	3,252	19,341	94,142
Principal payments on notes payable and other debt	0	(21,689)	(49,080)	(24,754)
Payoff of financing liability	0	(7,900)	0	0
Proceeds from term loan	74,352	69,462	0	0
Proceeds from sale of common shares under distribution reinvestment and share purchase program	0	0	0	1,493
Additions to notes receivable from noncontrolling partner – consolidated real estate entities	0	0	(9,211)	0
Proceeds from noncontrolling partner – consolidated real estate entities	0	0	9,749	1,120
Payments for acquisition of noncontrolling interests – consolidated real estate entities	0	0	(4,938)	0
Proceeds from sale of preferred shares	0	99,467	0	0
Repurchase of common shares	(2,172)	(9,935)	(4,501)	(35,000)
Repurchase of preferred shares	0	(115,017)	(28,752)	0
Repurchase of partnership units	(498)	(8,775)	(966)	0
Distributions paid to common shareholders	(16,724)	(33,689)	(55,907)	(60,063)
Distributions paid to preferred shareholders	(5,116)	(8,763)	(10,744)	(11,514)
Distributions paid to noncontrolling interests – Unitholders of the Operating Partnership	(1,959)	(4,096)	(7,453)	(7,101)
Distributions paid to noncontrolling interests – consolidated real estate entities	(2,432)	(99)	(174)	(7,029)
Net cash provided (used) by financing activities	(88,065)	(175,991)	(317,920)	(189,338)
NET INCREASE (DECREASE) IN CASH, CASH EQUIVALENTS, AND RESTRICTED CASH	3,140	(40,684)	(14,708)	11,475
CASH, CASH EQUIVALENTS, AND RESTRICTED CASH AT BEGINNING OF YEAR	16,116	56,800	71,508	60,033
CASH, CASH EQUIVALENTS, AND RESTRICTED CASH AT END OF YEAR	19,256	16,116	56,800	71,508
SUPPLEMENTARY SCHEDULE OF NON-CASH INVESTING AND FINANCING ACTIVITIES
Distribution reinvestment plan – shares issued	0	0	0	3,997
Operating partnership distribution reinvestment plan – shares issued	0	0	0	130
Operating partnership units converted to shares	649	34	875	1,477
Real estate assets acquired through the issuance of operating partnership units	0	0	0	18,226
(Decrease) increase to accounts payable included within real estate investments	(329)	(3,415)	(1,851)	(10,420)
Conversion to equity of notes receivable from noncontrolling interests – consolidated real estate entities	670	0	9,846	0
Construction debt reclassified to mortgages payable	0	23,300	10,549	123,553
Increase in mortgage notes receivable	0	10,329	0	0
Decrease in real estate assets in connection with transfer of real estate assets in settlement of debt	0	0	0	87,213
Decrease in debt in connection with transfer of real estate assets in settlement of debt	0	0	0	122,610
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION
Cash paid for interest, net of amounts capitalized of $0, $0, $431 and $4,396, respectively	$ 24,135	$ 35,758	$ 34,432	$ 39,668