v3.8.0.1

Subsequent Events (Detail) |  | 1 Months Ended | 3 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | --- | --- | ---
May 31, 2017 $ / shares | Oct. 31, 2017 USD ($) | Jul. 31, 2017 USD ($) vessel | Jun. 30, 2017 USD ($) vessel | Feb. 28, 2017 USD ($) | Jan. 31, 2017 USD ($) shares | Oct. 31, 2016 USD ($) vessel | Aug. 31, 2014 USD ($) shares | May 31, 2014 USD ($) | Sep. 30, 2017 USD ($) | Jun. 30, 2017 USD ($) vessel | Mar. 31, 2017 USD ($) | Dec. 31, 2016 USD ($) vessel | Dec. 31, 2015 USD ($) | Dec. 31, 2014 USD ($) | Sep. 15, 2017 USD ($) | Sep. 12, 2017 vessel
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Aggregate proceeds received |  |  |  |  |  |  |  |  |  |  |  |  | $ 27,550,000 | $ 11,080,000 | $ 154,000,000 |  |
Gain (Loss) on Disposition of Assets |  |  |  |  |  |  |  |  |  |  |  |  | (20,600,000) |  |  |  |
Net proceeds from common stock |  |  |  |  |  |  |  |  |  |  |  |  | 7,558,000 | $ 246,032,000 | $ 111,190,000 |  |
Teekay Tanker Operations Ltd [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition, Percentage of Voting Interests Acquired |  |  |  |  |  |  |  | 50.00% |  |  |  |  |  |  | 50.00% |  |
Stock Issued During Period, Shares, New Issues | shares |  |  |  |  |  |  |  | 4,220,945 |  |  |  |  |  |  |  |  |
Net proceeds from common stock |  |  |  |  |  |  |  | $ 17,010,000 |  |  |  |  |  |  |  |  |
Tanker Investments Ltd [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Aggregate proceeds received |  |  |  |  |  |  |  |  | $ 154,000,000 |  |  |  |  |  |  |  |
Gain (Loss) on Disposition of Assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 10,000,000 |  |
Subsequent Event [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Sale Leaseback Transaction, Net Book Value |  |  | $ 153,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Member] | Teekay Tanker Operations Ltd [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition, Percentage of Voting Interests Acquired | 50.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Member] | Tanker Investments Ltd [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity Method Investment, Other than Temporary Impairment |  |  |  |  |  |  |  |  |  |  | $ 28,100,000 |  |  |  |  |  |
Subsequent Event [Member] | Continuous Offering [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net proceeds from common stock |  |  |  |  |  | $ 8,600,000 |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Member] | Private Placement [Member] | Teekay Corporation [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net proceeds from common stock |  |  |  |  |  | $ 5,000,000 |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Member] | Class A [Member] | Continuous Offering [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock Issued During Period, Shares, New Issues | shares |  |  |  |  |  | 3,800,000 |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Member] | Class A [Member] | Private Placement [Member] | Teekay Corporation [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock Issued During Period, Shares, New Issues | shares |  |  |  |  |  | 2,200,000 |  |  |  |  |  |  |  |  |  |  |
Aframax Tanker 1 [Member] | Subsequent Event [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of vessels | vessel |  |  |  | 1 |  |  |  |  |  |  | 1 |  |  |  |  |  |
Aggregate proceeds received |  |  |  | $ 7,500,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Gain (Loss) on Disposition of Assets |  |  |  |  |  |  |  |  |  |  | $ (200,000) | $ (2,800,000) |  |  |  |  |
Suezmax Tankers [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of vessels | vessel |  |  |  |  |  |  | 2 |  |  |  |  |  |  |  |  |  |
Aggregate proceeds received |  |  |  |  |  |  | $ 33,800,000 |  |  |  |  |  |  |  |  |  |
Gain (Loss) on Disposition of Assets |  |  |  |  |  |  |  |  |  |  |  |  | $ (6,200,000) |  |  |  |
Yamuna Spirit [Member] | Subsequent Event [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Gain (Loss) on Disposition of Assets |  |  |  |  |  |  |  |  |  |  |  | (1,500,000) |  |  |  |  |
Yamuna Spirit [Member] | Subsequent Event [Member] | Reduction in sales price [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Aggregate proceeds received |  |  |  |  | $ 1,300,000 |  |  |  |  |  |  |  |  |  |  |  |
Ganges Spirit [Member] | Subsequent Event [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Gain (Loss) on Disposition of Assets |  |  |  |  |  |  |  |  |  |  |  | $ (300,000) |  |  |  |  |
Aframax Tanker 3 [Member] | Subsequent Event [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Aggregate proceeds received |  | $ 6,400,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Maximum [Member] | Subsequent Event [Member] | Class A [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock Repurchase Program, Authorized Amount |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 45,000,000 |
Aframax Tanker 2 [Member] | Subsequent Event [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of vessels | vessel |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1
Scenario, Forecast [Member] | Aframax Tanker 3 [Member] | Subsequent Event [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Gain (Loss) on Disposition of Assets |  |  |  |  |  |  |  |  |  | $ 4,000,000 |  |  |  |  |  |  |
Scenario, Forecast [Member] | Aframax Tanker 2 [Member] | Subsequent Event [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Gain (Loss) on Disposition of Assets |  |  |  |  |  |  |  |  |  | $ (4,200,000) |  |  |  |  |  |  |
Tanker Investments Ltd [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of vessels | vessel |  |  |  |  |  |  |  |  |  |  |  |  | 1 |  |  |  |
Tanker Investments Ltd [Member] | Subsequent Event [Member] | Common Stock [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity Method Investment Number Of Shares Acquiring, Per Share | $ / shares | $ 3.3 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Sale Leaseback Transaction, Name [Domain] | Subsequent Event [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Sale Leaseback Transaction, Average Rate Per Day |  |  | $ 11,100 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Sale Leaseback Transaction, Term Of Contract |  |  | 12 years |  |  |  |  |  |  |  |  |  |  |  |  |  |
Sale Leaseback Transaction, Name [Domain] | Suezmax Tankers [Member] | Subsequent Event [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of vessels | vessel |  |  | 4 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Teekay Tanker Operations Ltd [Member] | Subsequent Event [Member] | Teekay Parent [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition, Percentage of Voting Interests Acquired | 50.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |

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