Partners' Capital and Distributions Unit Activity (Details)	9 Months Ended
	Sep. 30, 2013	Dec. 31, 2012
Common Units [Member]
Capital Unit [Line Items]
Limited Partners' Capital Account, Units Outstanding	210,700,852	170,951,457
Stock Issued During Period, Shares, Share-based Compensation, Net of Forfeitures, Net of Tax	35,615
Stock Issued During Period, Shares, Issued for Cash	5,712,138
Partners' Capital Account, Units, Converted	2,629,223
Noncash or Part Noncash Acquisition, Noncash Financial or Equity Instrument Consideration, Shares Issued	31,372,419
Class F Units [Member]
Capital Unit [Line Items]
Limited Partners' Capital Account, Units Outstanding	6,274,483	0
Stock Issued During Period, Shares, Share-based Compensation, Net of Forfeitures, Net of Tax	0
Stock Issued During Period, Shares, Issued for Cash	0
Partners' Capital Account, Units, Converted	0
Noncash or Part Noncash Acquisition, Noncash Financial or Equity Instrument Consideration, Shares Issued	6,274,483