That's no longer news, as that was a part of the secondary offering just executed by the underwriters. Here is the relevant line from the SEC filing:
" The Underwriting Agreement provides for the issuance and sale by the Partnership of up to 3,025,000 common units representing limited partner interests in the Partnership ("Common Units") and for the sale by the Selling Unitholders of 1,849,366 Common Units in an underwritten public offering (the "Units Offering") at a price to the public of $29.25 per Common Unit. The Partnership has also granted the Underwriters a 30-day option to purchase up to 731,155 additional Common Units to cover over-allotments, which was exercised on February 7, 2011. "
He is getting ready to retire. What's most important for investors is the company's successful business model and the accelerating business coming from the aging of the Babby Boomer cohort.