DEBT - Bonds Payable, Additional Information(Details)
12 Months Ended
Aug. 01, 2012
USD ($)
Dec. 31, 2014
USD ($)
Dec. 31, 2015
USD ($)
Aug. 27, 2014
USD ($)
Dec. 01, 2010
Debt Instrument [Line Items]          
Tendered bonds   $ 298,000,000 $ 0    
Debt   592,867,000 271,057,000    
Jefferson Terminal          
Debt Instrument [Line Items]          
Fair value of bonds at acquisition       $ 115,000,000  
Bonds payable          
Debt Instrument [Line Items]          
Unamortized premium     1,751,000    
Debt   346,521,000 47,261,000    
Bonds payable | Series 2010 Bonds          
Debt Instrument [Line Items]          
Repayments of debt   2,000,000      
Repayments of bonds   298,000,000      
Debt   298,000,000 0    
Bonds payable | Series 2010 Bonds | Jefferson Terminal          
Debt Instrument [Line Items]          
Debt face amount     300,000,000    
Interest rate         0.60%
Bonds payable | Series 2012 Bonds          
Debt Instrument [Line Items]          
Unamortized premium   $ 1,791,000 1,751,000    
Service coverage ratio   1.25      
Debt   $ 48,521,000 $ 47,261,000    
Bonds payable | Series 2012 Bonds | Jefferson Terminal          
Debt Instrument [Line Items]          
Fair value of bonds at acquisition       48,554,000  
Unamortized premium       $ 1,823,000  
Bonds payable | Series 2012 Bonds | Jefferson Terminal          
Debt Instrument [Line Items]          
Debt face amount $ 46,875,000        
Period of interest reserve 6 months        
Interest rate     8.25%