Mortgages Payable - Additional Information (Detail) (USD $)	3 Months Ended	12 Months Ended					3 Months Ended		1 Months Ended		3 Months Ended	1 Months Ended
	Mar. 31, 2013	Dec. 31, 2004	Dec. 31, 2000	Dec. 31, 1999	Dec. 31, 2012	Nov. 05, 2009 Secured debt [Member]	Mar. 31, 2013 Second Mortgage [Member]	Nov. 05, 2009 Second Mortgage [Member]	Jul. 05, 2007 First Mortgage [Member]	Nov. 29, 2004 First Mortgage [Member]	Mar. 31, 2013 First Mortgage [Member]	Nov. 29, 2004 Pre Existing First Mortgage [Member]	Nov. 29, 2004 Pre Existing Second Mortgage [Member]
Debt Instrument [Line Items]
Debt instrument amount	$ 100,000,000							$ 16,000,000		$ 84,000,000
Repayments of debt									35,000,000	49,000,000		12,020,814	27,979,186
Debt instrument, interest rate							7.00%		5.34%
Loan, monthly payments							113,085				507,838
Loan, amortization schedule							25 years				25 years
Loan, balance amount							15,113,064				73,383,432
Principal amount on maturity date							14,613,782				69,797,589
Debt maturity date							Nov. 05, 2014				Nov. 05, 2014
Maximum period for no prepayment penalty at the end of term	60 days
Fair value of mortgage debt	92,905,010
Mortgage financing costs	2,935,131
Estimated cost of building improvements program				22,800,000
Increase in estimated cost of building improvements program			28,000,000
Further increase in estimated cost of building improvement		100,000,000
Cost incurred by Registrant related to building improvements program	78,393,622
Estimated cost of initial building improvements program on completion	100,000,000
Total funds available under mortgage						100,000,000
Additional approved funds under mortgage						16,000,000
Payable to Lessee, a related party	$ 21,951				$ 21,951