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Consolidated Balance Sheets (Parentheticals) - shares
Dec. 31, 2015
Dec. 31, 2014
Consolidated Balance Sheets [Abstract]    
Limited Partners - Common Units Issued 120,409,456 104,079,960
Limited Partners - Common Units Outstanding 120,409,456 104,079,960
Limited Partners - Preferred Units Issued 12,983,333 14,223,737
Limited Partners - Preferred Units Outstanding 12,983,333 14,223,737