REVENUE (Narrative) (Details)	3 Months Ended		6 Months Ended
	Jun. 30, 2020 USD ($)	Jun. 30, 2019 USD ($)	Jun. 30, 2020 USD ($) property	Jun. 30, 2019 USD ($)
Revenues, Total	$ 139,725,000	$ 69,010,000	$ 265,062,000	$ 170,884,000
Contract with customer, performance obligation satisfied in previous period	0		15,000,000
Capitalized contract cost, gross	$ 0		$ 0
Term of profit sharing arrangement			1 year
Profit Loss To Be Shared, Percentage	25
Lease cancellation period notice			90 days
Contract with customer adjustment to estimates of performance obligations decrease		$ 53,000,000		$ (481,000,000)
Panamaxes [Member]
Number of vessels party to contracts | property			6
Very Large Crude Carrier [Member]
Number of vessels party to contracts | property			4