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SEGMENT INFORMATION Table 4 (Details) - USD ($)
$ in Thousands
Dec. 31, 2015
Dec. 31, 2014
Segment Information    
Total consolidated assets $ 5,149,262 $ 4,918,796
Operating Segments [Member]    
Segment Information    
Total consolidated assets 4,647,353 4,432,036
Operating Segments [Member] | Pipeline Segment    
Segment Information    
Total consolidated assets 2,051,866 1,962,821
Operating Segments [Member] | Storage Segment    
Segment Information    
Total consolidated assets 2,438,621 2,241,573
Operating Segments [Member] | Fuels Marketing Segment    
Segment Information    
Total consolidated assets 156,866 227,642
Operating Segments [Member] | Other partnership assets    
Segment Information    
Total consolidated assets $ 501,909 $ 486,760