Mortgages Payable (Details) (USD $)	Feb. 28, 2013	Dec. 31, 2012	Dec. 31, 2011
Mortgage Loans on Real Estate [Line Items]
Long-term Debt, Current Maturities		$ 13,339,707
Long-term Debt, Maturities, Repayments of Principal in Year Two		17,661,871
Long-term Debt, Maturities, Repayments of Principal in Year Three		6,122,301
Long-term Debt, Maturities, Repayments of Principal in Year Four		0
Long-term Debt, Maturities, Repayments of Principal in Year Five		1,995,628
Long-term Debt, Maturities, Repayments of Principal after Year Five		0
Long-term Debt	$ 7,500,000	$ 39,119,507	$ 35,464,455

Carrying amount of long-term debt, net of unamortized discount or premium, including current and noncurrent amounts. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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