Summary of Significant Accounting Policies (Details Textual) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Significant Accounting Policies [Line Items]
Noncontrolling Interest, Ownership Percentage By Parent	97.72%	97.05%
Estimated Current Market Interest Rate	5.04%	3.76%
Amortization	$ 2,483,217	$ 1,712,530	$ 1,105,087
Common Stock, Dividends, Per Share, Declared	$ 1.64	$ 1.60	$ 1.60
Real Estate, Federal Income Tax Basis	$ 18,900,000
Acquired Finite-Lived Intangible Assets, Weighted Average Useful Life	19 years 4 months 24 days
Building and Building Improvements [Member] | Minimum [Member]
Significant Accounting Policies [Line Items]
Property, Plant and Equipment, Useful Life	20 years
Building and Building Improvements [Member] | Maximum [Member]
Significant Accounting Policies [Line Items]
Property, Plant and Equipment, Useful Life	40 years
Equipment and Fixtures [Member] | Minimum [Member]
Significant Accounting Policies [Line Items]
Property, Plant and Equipment, Useful Life	5 years
Equipment and Fixtures [Member] | Maximum [Member]
Significant Accounting Policies [Line Items]
Property, Plant and Equipment, Useful Life	10 years