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Operating Leases - Charters-in (Detail) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2024 USD ($) vessel yr | Dec. 31, 2023 USD ($) vessel | Dec. 31, 2022 USD ($)
Property Subject to or Available for Operating Lease [Line Items] |  |  |
Operating Lease, Right-of-Use Asset | $ 52,162 | $ 76,314 |
Charter hire expenses | (74,795) | (70,836) | $ (27,374)
Lessee, Operating Lease, Liability, Payments, Due | 93,783 |  |
Lessee, Operating Lease, Liability, Payments, Due Year Five | $ 7,388 |  |
Aframax/LR2 Tankers | May 2023 and September 2023 |  |  |
Property Subject to or Available for Operating Lease [Line Items] |  |  |
Operating Lease, Liability |  | $ 12,600 |
Teekay Tankers |  |  |
Property Subject to or Available for Operating Lease [Line Items] |  |  |
Number Of Vessels Chartered In | vessel | 11 | 10 |
Lessee, Operating Lease, Term of Contract | 54 months |  |
Lessee, Operating Lease, Liability, Payments, Due Year Five |  | $ 6,300 |
Teekay Tankers | Suezmax Tanker |  |  |
Property Subject to or Available for Operating Lease [Line Items] |  |  |
Number Of Vessels Chartered In | yr | 1 |  |
Teekay Tankers | Suezmax, Aframax and LR2 Vessels |  |  |
Property Subject to or Available for Operating Lease [Line Items] |  |  |
Number Of Vessels Chartered In | vessel | 4 |  |
Lessor, Operating Lease, Option to Extend | one |  |
Operating lease arrangement period, lessor (in years) | 1 year |  |
Teekay Tankers | Suezmax |  |  |
Property Subject to or Available for Operating Lease [Line Items] |  |  |
Lessor, Operating Lease, Option to Extend | one |  |
Teekay Tankers | Suezmax | March 2022 Sale Leaseback |  |  |
Property Subject to or Available for Operating Lease [Line Items] |  |  |
Number of vessels | vessel |  | 8 |
Teekay Tankers | Aframax/LR2 Tankers |  |  |
Property Subject to or Available for Operating Lease [Line Items] |  |  |
Operating Lease, Right-of-Use Asset |  | $ 56,200 |
Number Of Vessels Chartered In | vessel | 1 | 3 |
Lessee, Operating Lease, Term of Contract |  | 12 months |
Operating Lease, Liability |  | $ 56,200 |
Teekay Tankers | Aframax/LR2 Tankers | March 2023 |  |  |
Property Subject to or Available for Operating Lease [Line Items] |  |  |
Lessee, Operating Lease, Term of Contract |  | 24 months |
Teekay Tankers | Aframax/LR2 Tankers | February 2023 |  |  |
Property Subject to or Available for Operating Lease [Line Items] |  |  |
Lessee, Operating Lease, Term of Contract |  | 36 months |
Teekay Tankers | Aframax/LR2 Tankers | January 2023 |  |  |
Property Subject to or Available for Operating Lease [Line Items] |  |  |
Lessee, Operating Lease, Term of Contract |  | 84 months |
Teekay Tankers | Aframax/LR2 Tankers | May 2023 and September 2023 |  |  |
Property Subject to or Available for Operating Lease [Line Items] |  |  |
Operating Lease, Right-of-Use Asset |  | $ 12,600 |
Teekay Tankers | Aframax/LR2 Tankers | May 2024 |  |  |
Property Subject to or Available for Operating Lease [Line Items] |  |  |
Operating Lease, Right-of-Use Asset | $ 8,600 |  |
Operating Lease, Liability | $ 8,600 |  |
Teekay Tankers | Ship-to-ship Support Vessel |  |  |
Property Subject to or Available for Operating Lease [Line Items] |  |  |
Number Of Vessels Chartered In | vessel | 1 | 1 |
Lessee, Operating Lease, Term of Contract |  | 18 months |
Teekay Tankers | Ship-to-ship Support Vessel | September 2023 |  |  |
Property Subject to or Available for Operating Lease [Line Items] |  |  |
Operating Lease, Right-of-Use Asset |  | $ 900 |
Teekay Tankers | Ship-to-ship Support Vessel | May 2024 |  |  |
Property Subject to or Available for Operating Lease [Line Items] |  |  |
Operating Lease, Right-of-Use Asset | $ 500 |  |
Operating Lease, Liability | 500 |  |
Teekay Tankers | Ship-to-ship Support Vessel | September 2023 |  |  |
Property Subject to or Available for Operating Lease [Line Items] |  |  |
Operating Lease, Liability |  | 900 |
Teekay Tankers | Bunker Tanker |  |  |
Property Subject to or Available for Operating Lease [Line Items] |  |  |
Operating Lease, Right-of-Use Asset | $ 8,800 |  |
Number Of Vessels Chartered In | vessel | 1 |  |
Operating Lease, Liability | $ 8,800 |  |
Time Charter Expenses |  |  |
Property Subject to or Available for Operating Lease [Line Items] |  |  |
Charter hire expenses | $ (74,800) | $ (70,800) |
Operating Lease, Weighted Average Remaining Lease Term | 2 years 10 months 24 days | 3 years |
Operating Lease, Weighted Average Discount Rate, Percent | 6.36% | 6.40% |
Lease Component [Member] | Time Charter Expenses |  |  |
Property Subject to or Available for Operating Lease [Line Items] |  |  |
Charter hire expenses | $ (45,100) | $ (41,100) |
Lease [Member] |  |  |
Property Subject to or Available for Operating Lease [Line Items] |  |  |
Operating Lease, Liability | 53,591 |  |
Lessee, Operating Lease, Liability, Payments, Due | 58,844 |  |
Lessee, Operating Lease, Liability, Payments, Due Year Five | 3,944 |  |
Non-lease Component [Member] |  |  |
Property Subject to or Available for Operating Lease [Line Items] |  |  |
Lessee, Operating Lease, Liability, Payments, Due | 34,939 |  |
Lessee, Operating Lease, Liability, Payments, Due Year Five | 3,444 |  |
Non-lease Component [Member] | Time Charter Expenses |  |  |
Property Subject to or Available for Operating Lease [Line Items] |  |  |
Charter hire expenses | (29,700) | $ (29,700) |
Total Long-term Lease | Teekay Tankers |  |  |
Property Subject to or Available for Operating Lease [Line Items] |  |  |
Lessee, Operating Lease, Liability, Payments, Due Year Five | $ 7,400 |  |

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