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Short-Term Debt (Details) - USD ($) $ in Thousands | 9 Months Ended |  |  |  |
--- | --- | --- | --- | --- | ---
Sep. 30, 2021 | Dec. 31, 2021 | Dec. 31, 2020 | Jun. 28, 2019 | Nov. 30, 2018
Short-term Debt [Line Items] |  |  |  |  |
Short-term Debt |  | $ 25,000 | $ 10,000 |  |
Teekay Tankers |  |  |  |  |
Short-term Debt [Line Items] |  |  |  |  |
Short-term Debt |  | $ 25,000 | $ 10,000 |  |
Short-term Debt, Weighted Average Interest Rate, at Point in Time |  | 3.60% | 3.60% |  |
Undrawn amount of revolving credit facility |  | $ 45,400 | $ 32,000 |  |
Teekay Tankers | Short-term Debt [Member] |  |  |  |  |
Short-term Debt [Line Items] |  |  |  |  |
Debt Instrument, Term | 6 months |  |  |  |
Credit facility, maximum borrowing capacity |  |  |  | $ 80,000 | $ 40,000
Teekay Tankers | Minimum |  |  |  |  |
Short-term Debt [Line Items] |  |  |  |  |
Debt Covenant, Required Capital Invested |  | 20,000 |  |  |
Teekay Tankers | Maximum |  |  |  |  |
Short-term Debt [Line Items] |  |  |  |  |
Debt Covenant, Required Capital Invested |  | $ 30,000 |  |  |
Teekay Tankers | LIBOR |  |  |  |  |
Short-term Debt [Line Items] |  |  |  |  |
Short-term Debt, Percentage Bearing Variable Interest Rate |  | 3.50% |  |  |

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