LEASES (Future Minimum Revenues on Charters-Out) (Details) - Charters-Out [Member] $ in Thousands	3 Months Ended
	Mar. 31, 2020 USD ($)
Operating Leases, Future Minimum Payments Receivable [Abstract]
2020	$ 33,718
2021	21,354
2022	16,425
2023	3,195
Net minimum lease payments	$ 74,692
2020, revenue days	1015 days
2021, revenue days	458 days
2022, revenue days	365 days
2023, revenue days	71 days
Revenue Days	1909 days