Related-Party Transactions - Rent Income - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2012 Renewals OptionPlan	Dec. 31, 2011
Operating Leased Assets [Line Items]
Number of options	4
Additional renewal period	25 years
Lease expiring date	2103
First renewal period of lease	From October 1, 2003 through September 30, 2028
Second renewal period of lease	From October 1, 2028 through September 30, 2053
Effective date of third modification lease	May 01, 1975
Number of additional renewals	2
Annual basic rent	$ 3,534,344	$ 3,288,666
Primary Overage rent	752,000	752,000
Percentage of monthly distributions	20.00%
Participants original cash investment	3,600,000
Monthly supervisory services expense additional payment	1,667
Amount of interest earned on funds borrowed for improvement program	148	111
Lease surrender descriptions	The Lessee may surrender the Lease at the end of any month, upon 60 days prior written notice; the liability of the Lessee will end on the effective date of such surrender.
Written notice lease surrender period	60 days
Lessee [Member]
Operating Leased Assets [Line Items]
Percentage of excess of the net operating profit, as defined	50.00%
Lessee reported net operating profit	7,869,124	9,452,901
Real estate taxes paid directly by the Lessee	4,400,949	4,156,415
Monthly additional rent [Member]
Operating Leased Assets [Line Items]
Primary Overage rent	62,667
Base [Member]
Operating Leased Assets [Line Items]
Annual basic rent	$ 28,000