Supervisory Services - Additional Information (Detail) (USD $)	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012	Dec. 31, 2012
Operating Cash Flows Direct Method [Abstract]
Supervisory services basic rate, annual since inception			$ 100,000
Basic fee payable at rate per month			8,333
Increase in basic payment plus annual Consumer Price Index adjustment			725,000
Adjustment in Basic Payment			761,888
Additional payment of distributions received by the participants			6.00%
Required rate of return on cash investment for additional payment			9.00%
Original cash investment	33,000,000		33,000,000
Supervisory service fees			380,944	375,654
Annual minimum Additional fee			29,708
Basis of minimum Additional fee due to debt service reductions			6.00%
Remuneration paid to member			0	0
Accrued supervisory fees					846,000
Professional Fee Amount	151,238	124,086	466,059	320,066
Due from Supervisor, distribution amounts			324,111		324,111
Due to supervisor, distribution amounts	2,895,026		2,895,026		2,193,548
Extra or special benefit not shared on a pro rata basis			$ 0