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Consolidated Statements of Comprehensive Income / (Loss) (USD $) In Thousands, except Share data, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011
Revenue: |  |  |
Revenues | $ 116,520 | $ 84,012 | $ 98,517
Revenues - related party (Note 4) | 54,974 | 69,938 | 31,799
Total revenues | 171,494 | 153,950 | 130,316
Expenses: |  |  |
Voyage expenses (Note 10) | 5,776 | 5,114 | 11,565
Voyage expenses - related party (Notes 4, 10) | 314 | 554 | 165
Vessel operating expenses (Note 10) | 38,284 | 22,126 | 4,949
Vessel operating expenses - related party (Notes 4, 10) | 17,039 | 23,634 | 30,516
General and administrative expenses (Note 4) | 9,477 | 9,159 | 10,609
Loss / (gain) on sale of vessels to third parties (Note 5) | 7,073 | (1,296) | 0
Depreciation & amortization (Note 5) | 52,208 | 48,235 | 37,214
Vessels' impairment charge (Note 5) | 0 | 43,178 | 0
Operating income | 41,323 | 3,246 | 35,298
Non operating income: |  |  |
Gain on sale of claim (Note 16) | 31,356 | 0 | 0
Gain from bargain purchase (Note 3) | 42,256 | 0 | 82,453
Total non operating income | 73,612 | 0 | 82,453
Other income (expense): |  |  |
Interest expense and finance cost | (15,991) | (26,658) | (33,820)
Gain on interest rate swap agreement (Note 8) | 4 | 1,448 | 2,310
Interest and other income | 533 | 775 | 879
Total other expense, net | (15,454) | (24,435) | (30,631)
Partnership's Net income/ (loss) | 99,481 | (21,189) | 87,120
Preferred unit holders' interest in Partnership's net income | 18,805 | 10,809 | 0
General Partner's interest in Partnership's net income / (loss) | 1,598 | (640) | 1,742
Common unit holders' interest in Partnership's net income / (loss) | 79,078 | (31,358) | 85,378
Net income / (loss) per (Note 15): |  |  |
Common unit basic | $ 1.04 | $ (0.46) | $ 1.78
Weighted-average units outstanding: |  |  |
Common unit basic | 75,645,207 | 68,256,072 | 47,138,336
Net income per (Note 15): |  |  |
Common unit diluted | $ 1.01 | $ (0.46) | $ 1.78
Weighted-average units outstanding: |  |  |
Common units diluted | 97,369,136 | 68,256,072 | 47,138,336
Comprehensive income / (loss): |  |  |
Partnership's net income / (loss) | 99,481 | (21,189) | 87,120
Other Comprehensive income: |  |  |
Unrealized gain on derivative instruments (Note 8) | 462 | 10,762 | 17,518
Comprehensive income/ (loss) | $ 99,943 | $ (10,427) | $ 104,638

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