XML 29 R18.htm IDEA: XBRL DOCUMENT v2.4.0.6
Units Outstanding (Tables)
9 Months Ended
Sep. 30, 2012
Units Outstanding [Abstract]  
Changes in Holding Units Outstanding
Changes in Holding Units outstanding during the nine-month period ended September 30, 2012 were as follows:

Outstanding as of December 31, 2011
  105,173,342 
Options exercised
   
Units issued
   
Units forfeited
   
Outstanding as of September 30, 2012
  105,173,342