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Consolidated Balance Sheets (Parentheticals) - shares | Dec. 31, 2016 | Dec. 31, 2015
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Consolidated Balance Sheets [Abstract] |  |
Limited Partners - Common Units Issued | 122,094,633 | 120,409,456
Limited Partners - Common Units Outstanding | 122,094,633 | 120,409,456
Limited Partners - Preferred Units Issued | 12,983,333 | 12,983,333
Limited Partners - Preferred Units Outstanding | 12,983,333 | 12,983,333

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