SCHEDULE OF SELECTED QUARTERLY FINANCIAL DATA (Details) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended												12 Months Ended
		Sep. 30, 2019		Jun. 30, 2019		Mar. 31, 2019		Dec. 31, 2018		Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2017
Quarterly Financial Information Disclosure [Abstract]
Rental and Reimbursement Revenue		$ 40,597		$ 39,472		$ 39,306		$ 39,147		$ 36,617	$ 34,736	$ 34,344	$ 33,465
Total Expenses		21,337		20,646		20,490		19,825		19,488	17,611	17,643	16,991	$ 82,298	$ 71,733	$ 59,602
Unrealized Holding Gains (Losses) Arising During the Periods (1)	[1]	13,988		(11,609)		15,568		(42,627)		0	0	0	0
Other Income (Expense)		8,553	[1]	(17,198)	[1]	9,485	[1]	(47,264)	[1]	(4,969)	(4,651)	(5,056)	(4,442)	(46,424)	(19,118)	(16,512)
Income from Operations		$ 27,814		$ 1,628		$ 28,301		$ (27,943)		$ 12,160	$ 12,474	$ 11,645	$ 12,242
Income from Operations per diluted share		$ 0.29		$ 0.02		$ 0.30		$ (0.31)		$ 0.15	$ 0.16	$ 0.15	$ 0.16
Net Income (Loss)		$ 27,814	[1]	$ 1,628	[1]	$ 28,301	[1]	$ (27,943)	[1]	$ 12,160	$ 14,571	$ 11,645	$ 17,630	$ 29,800	$ 56,006	$ 40,271
Net Income per diluted share		$ 0.29	[1]	$ 0.02	[1]	$ 0.30	[1]	$ (0.31)	[1]	$ 0.15	$ 0.18	$ 0.15	$ 0.23	$ 0.12	$ 0.49	$ 0.32
Net Income Attributable to Common Shareholders		$ 22,690	[1]	$ (3,121)	[1]	$ 23,821	[1]	$ (32,364)	[1]	$ 7,782	$ 10,323	$ 7,397	$ 13,313	$ 11,026	$ 38,815	$ 22,942
Net Income Attributable to Common Shareholders per diluted share		$ 0.24	[1]	$ (0.03)	[1]	$ 0.26	[1]	$ (0.36)	[1]	$ 0.10	$ 0.13	$ 0.10	$ 0.17	$ 0.12	$ 0.49	$ 0.32
Lease Termination Income										$ 0	$ 0	$ 0	$ 210	$ 0	$ 210	$ 0
Gain on Sale of Real Estate Investment										$ 0	$ 2,097	$ 0	$ 5,388	$ 0	$ 7,485	$ 0

[1] Effective October 1, 2018 we adopted ASU 2016-01. This new accounting standard requires unrealized gains or losses on our securities investments to flow through our income statement. Periods shown here prior to October 1, 2018 do not include the effect of this accounting change and therefore Net Income Attributable to Common Shareholders between these periods are not comparable.