LEASES (Future Minimum Revenues on Charters-Out) (Details) - Charters-Out [Member] $ in Thousands	6 Months Ended
	Jun. 30, 2020 USD ($)
Operating Leases, Future Minimum Payments Receivable [Abstract]
2020	$ 51,815
2021	20,139
2022	16,425
2023	3,195
Net minimum lease payments	$ 91,574
2020, revenue days	1057 days
2021, revenue days	431 days
2022, revenue days	365 days
2023, revenue days	71 days
Revenue Days	1924 days