Summary of Significant Accounting Policies (Details Textual) (USD $)	3 Months Ended		12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Noncontrolling Interest, Ownership Percentage By Parent	97.05%	96.59%	97.05%	96.59%
Estimated Current Market Interest Rate			3.76%	4.87%
Amortization			$ 1,712,530	$ 1,105,087	$ 409,920
Common Stock, Dividends, Per Share, Declared	$ 0.40	$ 0.40	$ 1.60	$ 1.60	$ 2.04
Real Estate, Federal Income Tax Basis	$ 18,700,000		$ 18,700,000
Acquired Finite-Lived Intangible Assets, Weighted Average Useful Life			19 years 10 months 24 days
Building and Building Improvements [Member] | Minimum [Member]
Property, Plant and Equipment, Useful Life			20 years
Building and Building Improvements [Member] | Maximum [Member]
Property, Plant and Equipment, Useful Life			40 years
Equipment and Fixtures [Member] | Minimum [Member]
Property, Plant and Equipment, Useful Life			5 years
Equipment and Fixtures [Member] | Maximum [Member]
Property, Plant and Equipment, Useful Life			10 years