CONSOLIDATED STATEMENT OF STOCKHOLDERS' EQUITY (UNAUDITED) - USD ($) $ in Thousands	Preferred Stock [Member] 6.75% Series G Cumulative Preferred Stock [Member]	Preferred Stock [Member] Series H Preferred Stock [Member]	Preferred Stock [Member] Series K Preferred Stock [Member]	Common Stock [Member] Common Stock [Member]	Common Stock [Member] Class A Common Stock [Member]	Additional Paid In Capital [Member]	Cumulative Distributions In Excess of Net Income [Member]	Cumulative Distributions In Excess of Net Income [Member] Cumulative Effect, Period of Adoption, Adjustment [Member]	Cumulative Distributions In Excess of Net Income [Member] Common Stock [Member]	Cumulative Distributions In Excess of Net Income [Member] Class A Common Stock [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Accumulated Other Comprehensive Income (Loss) [Member] Cumulative Effect, Period of Adoption, Adjustment [Member]	Total	Cumulative Effect, Period of Adoption, Adjustment [Member]	Common Stock [Member]	Class A Common Stock [Member]
Balance at Oct. 31, 2018	$ 75,000	$ 115,000		$ 99	$ 298	$ 518,136	$ (133,858)	$ 569			$ 7,466	$ (569)	$ 582,141	$ 0
Balance (in shares) at Oct. 31, 2018	3,000,000	4,600,000		9,822,006	29,814,814
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income applicable to Common and Class A common stockholders							18,922						18,922		$ 3,983	$ 14,939
Change in unrealized income on interest rate swap											(12,081)		(12,081)
Cash dividends paid :
Common stock									$ (7,321)	$ (24,617)					(7,321)	(24,617)
Issuance of shares under dividend reinvestment plan				$ 0	$ 0	146							146
Issuance of shares under dividend reinvestment plan (in shares)				3,550	4,217
Shares issued under restricted stock plan				$ 1	$ 1	(2)							0
Shares issued under restricted stock plan (in shares)				137,200	111,450
Shares withheld for employee taxes					$ 0	(269)							(269)
Shares withheld for employee taxes (in shares)					(14,290)
Forfeiture of restricted stock					$ 0								0
Forfeiture of restricted stock (in shares)					(24,150)
Restricted stock compensation and other adjustments						3,229							3,229
Adjustments to redeemable noncontrolling interests							(1,760)						(1,760)
Balance at Jul. 31, 2019	$ 75,000	$ 115,000		$ 100	$ 299	521,240	(148,065)				(5,184)		558,390
Balance (in shares) at Jul. 31, 2019	3,000,000	4,600,000		9,962,756	29,892,041
Balance at Oct. 31, 2018	$ 75,000	$ 115,000		$ 99	$ 298	518,136	(133,858)	$ 569			7,466	$ (569)	582,141	$ 0
Balance (in shares) at Oct. 31, 2018	3,000,000	4,600,000		9,822,006	29,814,814
Balance at Oct. 31, 2019		$ 115,000	$ 110,000	$ 101	$ 299	520,988	(158,213)				(8,451)		579,724
Balance (in shares) at Oct. 31, 2019		4,600,000	4,400,000	9,963,751	29,893,241
Balance at Apr. 30, 2019	$ 75,000	$ 115,000		$ 100	$ 299	520,074	(144,319)				(201)		565,953
Balance (in shares) at Apr. 30, 2019	3,000,000	4,600,000		9,961,609	29,901,146
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income applicable to Common and Class A common stockholders							7,270						7,270		1,531	5,739
Change in unrealized income on interest rate swap											(4,983)		(4,983)
Cash dividends paid :
Common stock									(2,441)	(8,195)					(2,441)	(8,195)
Issuance of shares under dividend reinvestment plan				$ 0	$ 0	48							48
Issuance of shares under dividend reinvestment plan (in shares)				1,147	1,345
Shares withheld for employee taxes						0							0
Shares withheld for employee taxes (in shares)					0
Forfeiture of restricted stock					$ 0								0
Forfeiture of restricted stock (in shares)					(10,450)
Restricted stock compensation and other adjustments						1,118							1,118
Repurchase of Common stock					$ 0	0							0
Repurchase of Common stock (in shares)					0
Adjustments to redeemable noncontrolling interests							(380)						(380)
Balance at Jul. 31, 2019	$ 75,000	$ 115,000		$ 100	$ 299	521,240	(148,065)				(5,184)		558,390
Balance (in shares) at Jul. 31, 2019	3,000,000	4,600,000		9,962,756	29,892,041
Balance at Oct. 31, 2019		$ 115,000	$ 110,000	$ 101	$ 299	520,988	(158,213)				(8,451)		579,724
Balance (in shares) at Oct. 31, 2019		4,600,000	4,400,000	9,963,751	29,893,241
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income applicable to Common and Class A common stockholders							9,446						9,446		2,047	7,399
Change in unrealized income on interest rate swap											(9,994)		(9,994)
Cash dividends paid :
Common stock									(5,664)	(18,896)					(5,664)	(18,896)
Issuance of shares under dividend reinvestment plan				$ 0	$ 0	118							118
Issuance of shares under dividend reinvestment plan (in shares)				3,321	4,722
Shares issued under restricted stock plan				$ 1	$ 1	(2)							0
Shares issued under restricted stock plan (in shares)				105,450	120,800
Shares withheld for employee taxes					$ 0	(573)							(573)
Shares withheld for employee taxes (in shares)					0
Forfeiture of restricted stock					$ 0								0
Forfeiture of restricted stock (in shares)					(24,373)
Restricted stock compensation and other adjustments						4,443							4,443
Adjustments to redeemable noncontrolling interests							14,176						14,176
Balance at Jul. 31, 2020		$ 115,000	$ 110,000	$ 102	$ 300	524,974	(159,151)				(18,445)		572,780
Balance (in shares) at Jul. 31, 2020		4,600,000	4,400,000	10,072,522	29,994,390
Balance at Apr. 30, 2020		$ 115,000	$ 110,000	$ 102	$ 300	524,050	(161,165)				(17,498)		570,789
Balance (in shares) at Apr. 30, 2020		4,600,000	4,400,000	10,071,981	29,994,064
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income applicable to Common and Class A common stockholders							1,576						1,576		342	1,234
Change in unrealized income on interest rate swap											(947)		(947)
Cash dividends paid :
Common stock									$ (630)	$ (2,100)					$ (630)	$ (2,100)
Issuance of shares under dividend reinvestment plan				$ 0	$ 0	14							14
Issuance of shares under dividend reinvestment plan (in shares)				541	826
Shares withheld for employee taxes					$ 0	0							0
Shares withheld for employee taxes (in shares)					0
Forfeiture of restricted stock					$ 0								0
Forfeiture of restricted stock (in shares)					(500)
Restricted stock compensation and other adjustments						910							910
Adjustments to redeemable noncontrolling interests							3,168						3,168
Balance at Jul. 31, 2020		$ 115,000	$ 110,000	$ 102	$ 300	$ 524,974	$ (159,151)				$ (18,445)		$ 572,780
Balance (in shares) at Jul. 31, 2020		4,600,000	4,400,000	10,072,522	29,994,390