Amount of assets pledged to secure a debt instrument.

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Face (par) amount of debt instrument at time of issuance.

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Contractual interest rate for funds borrowed, under the debt agreement.

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Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity.

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DEBT, NET - Narrative (Details) - USD ($)	3 Months Ended		6 Months Ended
DEBT, NET - Narrative (Details) - USD ($)	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Feb. 11, 2020
Debt Instrument [Line Items]
Loss on extinguishment of debt	$ 0	$ 0	$ 4,724,000	$ 0
Revolving Credit Facility
Debt Instrument [Line Items]
Debt instrument collateral amount	150,000,000		$ 150,000,000
Jefferson Terminal
Debt Instrument [Line Items]
Loss on extinguishment of debt	$ 4,700,000
Series 2020 Bonds
Debt Instrument [Line Items]
Debt instrument face amount					$ 264,000,000.0
Series 2020A Dock and Wharf Facility Revenue Bonds
Debt Instrument [Line Items]
Debt instrument face amount					184,900,000
Series 2020B Taxable Facility Revenue Bonds
Debt Instrument [Line Items]
Debt instrument face amount					$ 79,100,000
Stated percentage					6.00%
Series 2020A Maturing in 2035
Debt Instrument [Line Items]
Debt instrument face amount					$ 53,500,000
Stated percentage					3.625%
Series 2020A Maturing in 2050
Debt Instrument [Line Items]
Debt instrument face amount					$ 131,400,000
Stated percentage					4.00%