XML 17 R3.htm IDEA: XBRL DOCUMENT v2.3.0.15
CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) Parenthetical
Sep. 30, 2011
Dec. 31, 2010
CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) Parenthetical [Abstract]  
Common units175,721,916169,721,916
Class B units22,866,66722,866,677