CASH FLOW INFORMATION - Non-cash (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Non-cash investing and financing activities
Cash paid for interest	$ 14,577	$ 21,927
Cash paid for estimated income taxes	0	0
Reclassification from vessels to vessels held for sale	20,889
Accounts payable and accrued expenses
Non-cash investing and financing activities
Purchase of scrubbers	25	7,420
Purchases of vessels and ballast water treatment systems	1,241	2,478
Purchase of other fixed assets	451	$ 427
Non-cash financing activities net proceeds from sale of assets	123
Non-cash financing activities cash dividends paid	$ 108