Distributions - Additional Information (Detail) (USD $)	1 Months Ended			3 Months Ended
	Aug. 31, 2012	May 31, 2012	Feb. 29, 2012	Sep. 30, 2012
Total cash distributions declared and paid	$ 223,802	$ 212,180	$ 173,685
Distribution to limited partner, declaration date				Oct. 25, 2012
Distribution to limited partners amount approved				229,839
Declaration to limited partner, per unit amount declared				$ 4.86
Distribution to limited partner, distribution date				Nov. 05, 2012
Distributions to general partner				$ 2,322
General partner, partnership interest percentage				1.00%
Distribution to general partner, distribution date				Nov. 30, 2012