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Condensed Consolidated Statements Of Partners' Capital (USD $)
In Thousands
Number of Common Units [Member]
Common Unitholders [Member]
USD ($)
General Partner [Member]
USD ($)
Accumulated Other Comprehensive Loss [Member]
USD ($)
Non-controlling Interests [Member]
USD ($)
Total
USD ($)
Partners' capital at Dec. 31, 2009 $ 585,554$ 11,152$ (829)$ 23,056$ 618,933
Partners' capital, Number of Common Units at Dec. 31, 200939,488     
Comprehensive income:      
Net income 20,0526,139 (2,082)24,109
Current period reclassification to earnings-interest rate swaps   1,0351,0772,112
Changes in derivative financial instruments-interest rate swaps   (206)(218)(424)
Cash contributions  37  37
Cash distributions (43,644)(7,909) (5)(51,558)
Contribution for executive compensation  1,289  1,289
Unit based compensation expense 20   20
Unit based compensation expense, Number of Common Units98     
Acquisition of non-controlling interest in DG Marine (4,903)(100) (21,268)(26,271)
Partners' capital at Sep. 30, 2010 557,07910,608 560568,247
Partners' capital, Number of Common Units at Sep. 30, 201039,586     
Partners' capital at Dec. 31, 2010 669,264   669,264
Partners' capital, Number of Common Units at Dec. 31, 201064,615    64,615
Comprehensive income:      
Net income 43,476   43,476
Cash distributions (82,067)    
Issuance of units, Value 184,969    
Issuance of units7,350     
Partners' capital at Sep. 30, 2011 $ 815,642   $ 815,642
Partners' capital, Number of Common Units at Sep. 30, 201171,965    71,965