Basis of Presentation (Details)	Jun. 30, 2011
Basis of Presentation [Abstract]
Number of the Partnership's common units owned (in shares)	102.7
Number of Partnership's class B units owned (in shares)	22.9
Percent of general partner interest owned (in hundredths)	2.00%
Percent owned of Partnership's equity interests (in hundredths)	64.00%