Consolidated Statements of Partners' Capital (Unaudited) (USD $)	General Partner Capital [Member]	Limited Partners' Capital [Member]	Total OMIF Partners' Capital [Member]	Noncontrolling Interest [Member]	Total
Balances at Dec. 31, 2010	$ 2,259,916	$ 216,841,448	$ 219,101,364	$ 16,467	$ 219,117,831
Balances (in Shares) at Dec. 31, 2010		290,019,136
Net (loss) income	(68,619)	(6,600,916)	(6,669,535)	681,244	(5,988,291)
Net (loss) income (in Shares)		55,745
Noncontrolling interests of newly consolidated LLC’s				16,257,427	16,257,427
Contribution from noncontrolling interest				135,944	135,944
Partners’ capital distributions	(87,705)	(8,499,997)	(8,587,702)		(8,587,702)
Partners’ capital distributions (in Shares)		(8,499,999)
Partners’ income distributions	(14,911)	(1,389,180)	(1,404,091)	(14,092)	(1,418,183)
Balances at Sep. 30, 2011	2,088,681	200,351,355	202,440,036	17,076,990	219,517,026
Balances (in Shares) at Sep. 30, 2011		281,574,882
Balances at Dec. 31, 2011	1,848,993	179,196,966	181,045,959	17,519,828	198,565,787
Balances (in Shares) at Dec. 31, 2011		278,605,524
Net (loss) income	2,513	240,087	242,600	515,289	757,889
Change in ownership interests in consolidated LLC (Note 5)	28,150	2,731,617	2,759,767	(9,959,767)	(7,200,000)
Partners’ income distributions	(6,413)	(621,455)	(627,868)	(16,187)	(644,055)
Balances at Sep. 30, 2012	$ 1,873,243	$ 181,547,215	$ 183,420,458	$ 8,059,163	$ 191,479,621
Balances (in Shares) at Sep. 30, 2012		278,605,524