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Net (Loss) / Income Per Unit (Tables)
 12 Months Ended
Dec. 31, 2012
Net (Loss) / Income Per Unit (Abstract)  
Schedule of (Loss)/ Income Per Unit Basic and Diluted (Table Text Block)
 
 
 
 
 
 
 
 
 
 
 
 
Numerators
 
2012
 
 
2011
 
 
2010
Partnership's net (loss) /  income
 
$
(21,189)
  
 
$
87,120
  
 
$
17,936
Less:
 
 
 
 
 
 
 
 
 
 
 
Partnership's net income available to preferred unit holders
 
 
10,809
 
 
 
—
 
 
 
—
General Partner's interest in Partnership's net (loss) / income
 
 
(640)
  
 
 
1,742
  
 
 
359
Partnership's net (loss) / income allocable to unvested units
 
 
—
  
 
 
1,571
  
 
 
147
Partnership's net (loss) / income available to common unit holders
 
$
(31,358)
  
 
$
83,807
  
 
$
17,430
Denominators
 
 
 
 
 
 
 
 
 
 
 
Weighted average number of common units outstanding, basic and diluted
 
 
68,256,072
  
 
 
47,138,336
  
 
 
32,437,314
Net (loss) / income per common unit:
 
 
 
 
 
 
 
 
 
 
 
Basic and diluted
 
$
(0.46)
  
 
$
1.78
  
 
$
0.54