Related Parties - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2014 Acquisition	Dec. 31, 2013	Dec. 31, 2012
Related Party Transaction [Line Items]
Cash Distributions	$ (708,399)	$ (677,478)	$ (645,142)
Number of other partnerships formed for acquisition	3
General Partner [Member]
Related Party Transaction [Line Items]
Cash Distributions	$ (7,084)	$ (6,775)	$ (6,451)
General partner, partnership interest percentage	1.00%	1.00%	1.00%