Per-Unit Amounts	12 Months Ended
Dec. 31, 2011
Per-Unit Amounts [Abstract]
Per-Units Amounts [Text Block]	PER-UNIT AMOUNTS Income (loss) per limited partnership unit amounts are calculated based upon weighted-average units outstanding during the respective periods. Income (loss) per limited partnership unit, as presented in the accompanying financial statements, will vary from the per-unit amounts attributable to the individual limited partners due to the differences between the GAAP and tax basis treatment of certain items of income and expense and the fact that, within the respective classes of Class A Units and Class B Units, individual units have different characteristics including capital bases, cumulative operating and net property sales proceeds distributions, and cumulative earnings allocations as a result of, among other things, the ability of limited partners to elect that their units be treated as Class A Units or Class B Units, or to change their prior elections, on a quarterly basis. For the reasons mentioned above, distributions of net sale proceeds per unit also vary among individual limited partners. Distributions of net sale proceeds have been calculated at the investor level pursuant to the partnership agreement and allocated between the Class A and Class B limited partners in the period paid. Accordingly, distributions of net sale proceeds per unit, as presented in the accompanying financial statements, vary from the per-unit amounts attributable to the individual limited partners.

PER-UNIT AMOUNTS

Income (loss) per limited partnership unit amounts are calculated based upon weighted-average units outstanding during the respective periods. Income (loss) per limited partnership unit, as presented in the accompanying financial statements, will vary from the per-unit amounts attributable to the individual limited partners due to the differences between the GAAP and tax basis treatment of certain items of income and expense and the fact that, within the respective classes of Class A Units and Class B Units, individual units have different characteristics including capital bases, cumulative operating and net property sales proceeds distributions, and cumulative earnings allocations as a result of, among other things, the ability of limited partners to elect that their units be treated as Class A Units or Class B Units, or to change their prior elections, on a quarterly basis.

For the reasons mentioned above, distributions of net sale proceeds per unit also vary among individual limited partners. Distributions of net sale proceeds have been calculated at the investor level pursuant to the partnership agreement and allocated between the Class A and Class B limited partners in the period paid. Accordingly, distributions of net sale proceeds per unit, as presented in the accompanying financial statements, vary from the per-unit amounts attributable to the individual limited partners.