BUSINESS AND SEGMENT REPORTING (Reportable Segments Information) (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2025 USD ($) segment	Dec. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)
Segment Reporting Information [Line Items]
Number of reportable segments | segment	2
Revenues, services	$ 843,302	$ 951,613	$ 1,071,775
Vessel expenses	266,143	275,661	259,539
Charter hire expenses	33,261	29,839	39,404
Depreciation and amortization	163,586	149,440	129,038
(Gain) loss on disposal of vessels and other assets, net of impairments	(42,537)	(32,657)	(35,934)
Adjusted income/(loss) from vessel operations	356,624	478,163	627,538
Adjusted total assets	2,476,491	2,443,442	2,309,491
Expenditures for vessels and vessel improvements	340,480	278,794	205,159
Payments for drydocking	84,211	58,642	34,539
Time Charter Equivalent Services [Member]
Segment Reporting Information [Line Items]
Revenues, services	819,614	933,103	1,055,519
Time charter equivalent revenues	819,614	933,103	1,055,519
Vessel Operations [Member]
Segment Reporting Information [Line Items]
(Gain) loss on disposal of vessels and other assets, net of impairments	(42,537)	(32,657)	(35,934)
Adjusted income/(loss) from vessel operations	356,624	478,163	627,538
International Crude Tankers Segment [Member]
Segment Reporting Information [Line Items]
Revenues, services	439,611	451,351	524,006
Vessel expenses	119,290	130,107	115,708
Charter hire expenses	14,419	14,322	11,870
Depreciation and amortization	76,347	80,988	76,877
(Gain) loss on disposal of vessels and other assets, net of impairments	(9,833)	8,704	(12)
Adjusted income/(loss) from vessel operations	213,211	211,678	307,764
Adjusted total assets	1,411,798	1,437,883	1,523,713
Expenditures for vessels and vessel improvements	120,922	1,135	184,467
Payments for drydocking	22,781	9,893	5,659
International Crude Tankers Segment [Member] | Time Charter Equivalent Services [Member]
Segment Reporting Information [Line Items]
Revenues, services	423,267	437,095	512,220
International Product Carriers Segment [Member]
Segment Reporting Information [Line Items]
Revenues, services	403,691	500,262	547,769
Vessel expenses	146,853	145,554	143,831
Charter hire expenses	18,842	15,517	27,534
Depreciation and amortization	87,239	68,452	52,160
(Gain) loss on disposal of vessels and other assets, net of impairments	(32,704)	(41,361)	(35,922)
Adjusted income/(loss) from vessel operations	143,413	266,485	319,775
Adjusted total assets	1,064,693	1,005,559	785,778
Expenditures for vessels and vessel improvements	219,558	277,659	20,692
Payments for drydocking	61,430	48,749	28,880
International Product Carriers Segment [Member] | Time Charter Equivalent Services [Member]
Segment Reporting Information [Line Items]
Revenues, services	$ 396,347	$ 496,008	543,299
Other Segments [Member]
Segment Reporting Information [Line Items]
Depreciation and amortization			1
Adjusted income/(loss) from vessel operations			$ (1)