Federal Income Taxes (Details Textual) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Federal Income Taxes (Textual)
Percentage of adjusted taxable income require to distribute among shareholders, Minimum	90.00%
Preferred Dividends Paid, net	$ 7,556,588	$ 7,556,588	$ 5,068,697
Preferred stock, dividend declared per share, paid	$ 2.0625	$ 2.0625	$ 2.0625
Percentage of distributions taxed as ordinary income	$ 1.66551	$ 1.41816	$ 0.99966
Percentage of distributions taxed as capital gains	$ 0.39699	$ 0.64434	$ 1.06284
Amount of operating losses of S&F	3,946,571	2,746,526	3,081,837
Federal state and franchise taxes included in general and administrative expenses	$ 15,000	$ 5,000	$ 5,000