CONTINGENCIES (Narrative) (Details)	6 Months Ended
	Jun. 30, 2020 USD ($)
Galveston Accident [Member]
Loss Contingencies [Line Items]
Loss Contingency, Damages Sought, Value	$ 25,000,000
Merchant Navy Officers Pension Fund [Member]
Loss Contingencies [Line Items]
Multiemployer plans deficit amount for entity	0
Merchant Navy Ratings Pension Fund [Member]
Loss Contingencies [Line Items]
Multiemployer plans deficit amount for entity	$ 0
Multiemployer period of performance in the past	20 years