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Investments - Teekay Tankers - Principal Maritime - Additional Information (Detail) shares in Millions, $ in Millions | 1 Months Ended | 12 Months Ended
--- | --- | ---
Aug. 31, 2015 USD ($) vessel shares | Dec. 31, 2015 USD ($) vessel shares
Net Investment Income [Line Items] |  |
Number of common stock issued (in shares) | shares | 7.2 |
Number of common shares issued, non cash consideration | $ 49.3 |
Teekay Parent | Class A |  |
Net Investment Income [Line Items] |  |
Number of common stock issued (in shares) | shares | 4.5 |
Teekay Tankers | Principal Maritime Tankers | Class A |  |
Net Investment Income [Line Items] |  |
Number of common stock issued (in shares) | shares |  | 7.2
Number of common shares issued, non cash consideration |  | $ 49.3
Teekay Tankers | Suezmax | Principal Maritime Tankers |  |
Net Investment Income [Line Items] |  |
Number of vessels acquired | vessel | 12 | 12
Number of vessels | vessel | 12 |
Aggregate purchase price | $ 661.3 | $ 661.3
Aggregate purchase price, cash | 612.0 | $ 612.0
Teekay Tankers | Suezmax | Principal Maritime Tankers | Due January 2016 |  |
Net Investment Income [Line Items] |  |
Loan facility, amount | $ 397.2 |
Teekay Tankers | Suezmax | Principal Maritime Tankers | Class A |  |
Net Investment Income [Line Items] |  |
Number of common stock issued (in shares) | shares | 13.6 |
Net proceeds from common stock | $ 90.6 |

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