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Investments - Additional Information - Tanker Investments Ltd (Detail) (USD $) | 1 Months Ended | 6 Months Ended
--- | --- | ---
Jan. 31, 2014 | Jun. 30, 2014
Net Investment Income [Line Items] |  |
Stock purchase warrants |  | $ 6,839,000
Preferred Stock, Share |  | 0
Tanker Investments Limited [Member] |  |
Net Investment Income [Line Items] |  |
Preferred stock, voting rights |  | elect one board member
Tanker Investments Limited [Member] | Series A- One Preferred Stock [Member] |  |
Net Investment Income [Line Items] |  |
Preferred Stock, Share | 1 |
Tanker Investments Limited [Member] | Series A- Two Preferred Stock [Member] |  |
Net Investment Income [Line Items] |  |
Preferred Stock, Share | 1 |
Teekay Tankers [Member] | Tanker Investments Limited [Member] |  |
Net Investment Income [Line Items] |  |
Purchase of common stock | 5,000,000 |
Percentage of combined ownership interest | 20.00% | 13.00%
Issuance of equity private placement | 250,000,000 |
Equity method investment | 50,000,000 |
Stock purchase warrants | 6,839,000 |
Gain from sale of investment |  | $ 4,100,000
Teekay Tankers [Member] | Tanker Investments Limited [Member] | Suezmax tankers [Member] |  |
Net Investment Income [Line Items] |  |
Number of vessels |  | 4
Teekay Tankers [Member] | Tanker Investments Limited [Member] | Aframax tankers [Member] |  |
Net Investment Income [Line Items] |  |
Number of vessels |  | 5
Teekay Tankers [Member] | Tanker Investments Limited [Member] | Coated Aframax Tankers [Member] |  |
Net Investment Income [Line Items] |  |
Number of vessels |  | 2
Teekay Tankers [Member] | Tanker Investments Limited [Member] | VLCC [Member] |  |
Net Investment Income [Line Items] |  |
Number of vessels |  | 2
Teekay Tankers [Member] | Tanker Investments Limited [Member] | Warrant [Member] |  |
Net Investment Income [Line Items] |  |
Purchase price of common stock | $ 10 |
Teekay Tankers [Member] | Tanker Investments Limited [Member] | Warrant [Member] | Maximum [Member] |  |
Net Investment Income [Line Items] |  |
Number of shares available through exercise of stock purchase warrant | 1,500,000 |

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