Consolidated Statements of Comprehensive Income (Loss) - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Income Statement [Abstract]
Net Income	$ 12,668,034	$ 11,534,559	$ 2,144,205
Other Comprehensive Income (Loss):
Unrealized Holding Gains (Losses) Arising During the Year	(3,450,061)	21,057,498	(6,930,717)
Reclassification Adjustment for Net Gains Realized in Income	(1,747,528)	(2,285,301)	(204,230)
Change in Fair Value of Interest Rate Swap Agreements	3,983	(2,283)	37,985
Comprehensive Income (Loss)	7,474,428	30,304,473	(4,952,757)
Less: Preferred Dividends	(16,844,812)	(14,103,432)	(8,267,198)
Less: Redemption of Preferred Stock	(3,502,487)	0	0
Comprehensive Income (Loss) Attributable to Common Shareholders	$ (12,872,871)	$ 16,201,041	$ (13,219,955)