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Capital Stock - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands | 1 Months Ended | 12 Months Ended
--- | --- | ---
Apr. 30, 2019 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Class of Stock [Line Items] |  |  |  |
Preferred stock, shares authorized (in shares) |  | 25,000,000 |  |
Preferred stock, par value (in dollars per share) |  | $ 1 |  |
Common stock, share authorized (in shares) |  | 725,000,000 | 725,000,000 |
Common stock, par value (in dollars per share) |  | $ 0.001 | $ 0.001 |
Common stock, share issued (in shares) |  | 100,784,422 | 100,435,210 |
Preferred stock, share issued (in shares) |  | 0 |  |
Net cash proceeds |  | $ 0 | $ 0 | $ 172,930
Common stock conversion (in shares) |  | 1 |  |
Minimum Percentage Of Shares Acquired In Exercisable Rights |  | 20.00% |  |
Minimum percentage of common stock acquired by stockholders for higher thresholds |  | 15.00% |  |
Tender Offers [Member] |  |  |  |
Class of Stock [Line Items] |  |  |  |
Minimum Percentage Of Shares Acquired In Exercisable Rights |  | 20.00% |  |
Continuous Offering Program |  |  |  |
Class of Stock [Line Items] |  |  |  |
Sale of Stock, Offering Amount | $ 63,000 |  |  |
Teekay Parent | Continuous Offering Program |  |  |  |
Class of Stock [Line Items] |  |  |  |
Number of shares issued (in shares) |  |  | 1,100,000 |
Sale of Stock, Consideration Received Per Transaction |  |  | $ 10,700 |
Common Stock | Teekay Parent |  |  |  |
Class of Stock [Line Items] |  |  |  |
Number of shares issued (in shares) |  |  | 10,000,000 |
Sale of stock (in dollars per share) |  |  | $ 9.75 |
Net cash proceeds |  |  | $ 93,000 |
Share-based Payment Arrangement, Option [Member] |  |  |  |
Class of Stock [Line Items] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term |  | 5 years 6 months | 5 years 6 months | 6 years

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