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ACQUISITIONS - Jefferson Terminal Additional Information (Details) - USD ($)
12 Months Ended
Aug. 27, 2014
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Business Acquisition [Line Items]        
Transaction related costs   $ 6,316,000 $ 5,683,000 $ 11,450,000
Jefferson Terminal        
Business Acquisition [Line Items]        
Aggregate purchase price $ 608,300,000      
Assumed liabilities (522,522,000)      
Equity consideration 38,200,000      
Percent interest acquired     60.00%  
Remaining non-controlling interest     40.00%  
Loan obtained through acquisition 100,000,000      
Decrease in assumed fixed assets     $ 947,000  
Increase of assumed intangible assets     128,000  
Increase of assumed goodwill     1,358,000  
Increase in assumed accounts payable and accrued liabilities     390,000  
Measurement period adjustments for goodwill and estimated liabilities assumed     $ 149,000  
Jefferson Terminal | Retaining Shareholders        
Business Acquisition [Line Items]        
Remaining non-controlling interest     20.00%  
Jefferson Terminal | Subsidiary        
Business Acquisition [Line Items]        
Long-term debt $ 97,600,000      
Goodwill expected to be tax-deductible     $ 45,000,000