CASH FLOW INFORMATION - Non-cash (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Non-cash investing and financing activities
Reclassification from deposits on vessels to vessels, net of accumulated depreciation	$ 18,543
Reclassification from vessels to vessels held for sale		$ 7,798
Cash dividends paid	61,572	2,983
Cash paid for interest	3,739	6,764
Cash paid for estimated income taxes	0	0
Accounts payable and accrued expenses
Non-cash investing and financing activities
Purchases of vessels and ballast water treatment systems	3,965	497
Purchase of scrubbers		27
Purchase of other fixed assets	1,036	35
Net proceeds from sale of vessels		7
Non-cash financing activities cash dividends payable	599	$ 86
Prepaid expenses and other current assets
Non-cash investing and financing activities
Purchases of vessels and ballast water treatment systems	$ 348