Units Outstanding (Tables)

3 Months Ended

Mar. 31, 2014

Units Outstanding [Abstract]

Changes in Holding Units Outstanding

Changes in Holding Units outstanding during the three-month period ended March 31, 2014 are as follows:

Outstanding as of December 31, 2013	96,028,494
Options exercised	273,084
Units issued	8,337
Units retired	(71,933	)
Outstanding as of March 31, 2014	96,237,982