Consolidated Statements of Comprehensive Income (Loss) (Unaudited) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Income Statement [Abstract]
Net Income	$ 3,589,871	$ 3,051,462	$ 5,875,417	$ 4,957,931
Other Comprehensive Income (Loss):
Unrealized Holding Gain (Loss) Arising During the Period	(2,838,005)	10,664,758	(4,853,529)	19,421,567
Reclassification Adjustment for Net Gains Realized in Income	(1,019,877)	(782,373)	(1,051,768)	(1,014,378)
Change in Fair Value of Interest Rate Swap Agreements	(2,794)	(5,720)	7,147	(40,865)
Comprehensive Income (Loss)	(270,805)	12,928,127	(22,733)	23,324,255
Less: Preferred Dividends	(3,789,747)	(3,734,191)	(7,579,494)	(6,523,937)
Comprehensive Income (Loss) Attributable to Common Shareholders	$ (4,060,552)	$ 9,193,936	$ (7,602,227)	$ 16,800,318