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Units Outstanding (Tables)
6 Months Ended
Jun. 30, 2012
Units Outstanding [Abstract]  
Changes in Holding Units Outstanding
Changes in Holding Units outstanding during the six-month period ended June 30, 2012 were as follows:

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