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Equity and Capital Noncontrolling Interest of Partnership Units (Details)	Dec. 31, 2011	Dec. 31, 2010
Noncontrolling Interest of Partnership Units (details) [Abstract]
Other Ownership Interests, Units Outstanding		177,164
Limited Partners' Capital Account [Line Items]
Limited Partners' Capital Account, Units Outstanding	177,164	177,164

- Definition

The number of limited partner units outstanding.

+ References+ Details

- Definition

The number of units of other ownership interests outstanding in a limited partnership or master limited partnership. Does not include limited or general partners' ownership interests.

+ References+ Details