Consolidated Statements of Comprehensive Income (Loss) (Unaudited) - USD ($)	3 Months Ended		6 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2018	Mar. 31, 2017
Statement of Comprehensive Income [Abstract]
Net Income	$ 11,645,003	$ 8,424,611	$ 29,275,404	$ 18,278,532
Other Comprehensive Income:
Unrealized Holding Gains (Losses) Arising During the Period	(26,970,847)	2,175,171	(37,583,831)	234,130
Reclassification Adjustment for Net Gains Realized in Income	(11,234)	0	(111,387)	(806,108)
TOTAL COMPREHENSIVE INCOME (LOSS)	(15,337,078)	10,599,782	(8,419,814)	17,706,554
Less: Preferred Dividends	4,248,219	3,582,036	8,565,165	7,279,796
COMPREHENSIVE INCOME (LOSS) ATTRIBUTABLE TO COMMON SHAREHOLDERS	$ (19,585,297)	$ 7,017,746	$ (16,984,979)	$ 10,426,758