Units Outstanding (Tables)

6 Months Ended

Jun. 30, 2014

Units Outstanding [Abstract]

Changes in Holding Units Outstanding

Changes in Holding Units outstanding during the six-month period ended June 30, 2014 are as follows:

Outstanding as of December 31, 2013	96,028,494
Options exercised	705,310
Units issued	181,068
Units retired	(103,245	)
Outstanding as of June 30, 2014	96,811,627