Consolidated Statements of Comprehensive Income (Loss) (Unaudited) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Income Statement [Abstract]
Net Income	$ 3,262,001	$ 3,200,013	$ 9,137,418	$ 8,157,944
Other Comprehensive Income (Loss):
Unrealized Holding Gain (Loss) Arising During the Period	2,486,402	5,489,522	(2,367,127)	24,911,089
Reclassification Adjustment for Net Gains Realized in Income	(466,521)	(884,458)	(1,518,289)	(1,898,836)
Change in Fair Value of Interest Rate Swap Agreements	(3,164)	25,410	3,983	(15,455)
Comprehensive Income	5,278,718	7,830,487	5,255,985	31,154,742
Less: Preferred Dividends	(4,938,937)	(3,789,747)	(12,518,431)	(10,313,685)
Less: Redemption of Preferred Stock	(3,502,487)	0	(3,502,487)	0
Comprehensive Income (Loss) Attributable to Common Shareholders	$ (3,162,706)	$ 4,040,740	$ (10,764,933)	$ 20,841,057