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Segment Reporting - Revenue and Income from Vessel Operations by Segment (Detail) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Segment Reporting Information [Line Items] |  |  |
Revenue | $ 1,220,374 | $ 1,464,975 | $ 1,190,184
Operating Income (Loss) | 365,247 | 531,725 | 245,766
General and administrative expenses | (61,058) | (57,590) | (57,552)
Restructuring charges | (5,632) | (1,677) | (11,579)
Income (Loss) from Equity Method Investments | 2,767 | 3,432 | 244
Interest Expense | (7,542) | (28,009) | (38,580)
Interest income | 37,218 | 24,128 | 6,689
Other - net (note 17) | 4,334 | (1,691) | (3,066)
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest | 402,024 | 529,585 | 211,053
Voyage expenses | 405,546 | 474,371 | 495,604
Operating Costs and Expenses | (252,594) | (241,585) | (275,139)
Operating Lease, Expense | (74,795) | (70,836) | (27,374)
Depreciation, Depletion and Amortization | (93,582) | (97,551) | (99,033)
Gain on sale and write-down of assets (note 15) | 38,080 | 10,360 | 21,863
Intersegment Eliminations |  |  |
Segment Reporting Information [Line Items] |  |  |
General and administrative expenses | (320) |  |
Restructuring charges | 320 |  |
Tankers [Member] | Operating Segments |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenue | 1,106,278 | 1,364,452 | 1,063,111
Operating Income (Loss) | 365,461 | 535,910 | 255,949
General and administrative expenses | (48,833) | (45,936) | (41,769)
Restructuring charges | (5,952) | (1,248) | (1,822)
Income (Loss) from Equity Method Investments | 2,767 | 3,432 | 244
Voyage expenses | 405,546 | 474,371 | 495,604
Operating Costs and Expenses | (150,605) | (148,960) | (150,448)
Operating Lease, Expense | (74,379) | (70,836) | (27,374)
Depreciation, Depletion and Amortization | (93,582) | (97,551) | (99,033)
Gain on sale and write-down of assets (note 15) | 38,080 | 10,360 | 8,888
Marine Services and Other | Operating Segments |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenue | 114,096 | 100,523 | 127,073
Operating Income (Loss) | (214) | (4,185) | (10,183)
General and administrative expenses | (11,905) | (11,654) | (15,783)
Restructuring charges | 0 | (429) | (9,757)
Voyage expenses | 0 | 0 | 0
Operating Costs and Expenses | (101,989) | (92,625) | (124,691)
Operating Lease, Expense | (416) | 0 | 0
Depreciation, Depletion and Amortization | 0 | 0 | 0
Gain on sale and write-down of assets (note 15) | $ 0 | $ 0 | $ 12,975

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