v3.8.0.1

Public Offerings and Private Placements - Summary of Issuances of Common Shares (Detail) $ / shares in Units, $ in Thousands |  | 1 Months Ended | 3 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
Jan. 02, 2015 USD ($) shares | Nov. 30, 2015 USD ($) | Sep. 30, 2015 USD ($) | Aug. 31, 2015 USD ($) vessel $ / shares shares | Jul. 31, 2015 USD ($) $ / shares shares | Jun. 30, 2015 USD ($) | Jan. 31, 2015 USD ($) $ / shares shares | Dec. 31, 2014 USD ($) $ / shares shares | Aug. 31, 2014 USD ($) $ / shares shares | Oct. 31, 2015 USD ($) $ / shares shares | Dec. 31, 2016 USD ($) $ / shares shares | Dec. 31, 2015 USD ($) vessel $ / shares shares | Dec. 31, 2014 USD ($) $ / shares
Subsidiary, Sale of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Offering Price (In dollars per share) | $ / shares |  |  |  | $ 6.65 | $ 6.99 |  | $ 4.57 | $ 4.80 | $ 4.03 |  |  |  | $ 4.80
Net Proceeds |  |  |  |  |  |  |  |  |  |  | $ 7,558 | $ 246,032 | $ 111,190
Proceeds from equity offerings, net of offering costs |  |  |  |  |  |  |  |  |  |  | $ 7,558 | $ 242,264 | $ 111,190
Minimum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Subsidiary, Sale of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Offering Price (In dollars per share) | $ / shares |  |  |  |  |  |  |  |  |  | $ 6.12 |  |  |
Maximum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Subsidiary, Sale of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Offering Price (In dollars per share) | $ / shares |  |  |  |  |  |  |  |  |  | $ 7.92 |  |  |
Continuous Offering [Member] | Minimum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Subsidiary, Sale of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Offering Price (In dollars per share) | $ / shares |  |  |  |  |  |  |  |  |  |  | $ 2.38 | $ 6.04 |
Continuous Offering [Member] | Maximum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Subsidiary, Sale of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Offering Price (In dollars per share) | $ / shares |  |  |  |  |  |  |  |  |  |  | $ 2.75 | $ 7.70 |
Continuous Offering [Member] | Maximum [Member] | Class A [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Subsidiary, Sale of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Aggregate amount of shares issued at market price |  | $ 80,000 | $ 80,000 |  |  | $ 80,000 |  |  |  |  |  |  |
Over-Allotment Option [Member] | Class A [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Subsidiary, Sale of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Grant period for option to purchase common shares |  |  |  |  |  |  |  | 30 days |  |  |  |  |
Proceeds from equity offerings, net of offering costs | $ 13,700 |  |  |  |  |  |  |  |  |  |  |  |
Over-Allotment Option [Member] | Maximum [Member] | Class A [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Subsidiary, Sale of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Number of Common Stock Issued (in shares) | shares | 3,000,000 |  |  |  |  |  |  | 3,000,000 |  |  |  |  |
Ship to Ship Transfer Business [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Subsidiary, Sale of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Gross Proceeds |  |  |  |  | $ 45,500 |  |  |  |  |  |  |  |
Net Proceeds |  |  |  |  | $ 45,500 |  |  |  |  |  |  |  |
Ship to Ship Transfer Business [Member] | Class B [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Subsidiary, Sale of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Number of Common Stock Issued (in shares) | shares |  |  |  |  | 6,511,812 |  |  |  |  |  |  |  |
Principal Maritime Tankers [Member] | Suezmax Tankers [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Subsidiary, Sale of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Number of vessels | vessel |  |  |  | 12 |  |  |  |  |  |  |  | 12 |
Principal Maritime Tankers [Member] | Class A [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Subsidiary, Sale of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Number of Common Stock Issued (in shares) | shares |  |  |  | 7,200,000 |  |  |  |  |  |  |  | 7,200,000 |
Number of common shares issued, non cash consideration |  |  |  | $ 49,300 |  |  |  |  |  |  |  | $ 49,300 |
Principal Maritime Tankers [Member] | Public Offering [Member] | Class A [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Subsidiary, Sale of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Number of Common Stock Issued (in shares) | shares |  |  |  | 9,100,000 |  |  |  |  |  |  |  |  |
Teekay Corporation [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Subsidiary, Sale of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of voting power held by parent |  |  |  |  |  |  |  |  |  |  | 52.90% | 53.60% |
Ownership percentage by parent |  |  |  |  |  |  |  |  |  |  | 25.40% | 25.90% |
Teekay Corporation [Member] | Public Offering [Member] | Class A [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Subsidiary, Sale of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Number of Common Stock Issued (in shares) | shares |  |  |  |  |  |  |  | 20,000,000 |  |  |  |  |
Teekay Corporation [Member] | Private Placement [Member] | Class A [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Subsidiary, Sale of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Number of Common Stock Issued (in shares) | shares |  |  |  |  |  |  |  | 4,200,000 |  |  |  |  |
Teekay Corporation [Member] | Ship to Ship Transfer Business [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Subsidiary, Sale of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Teekay's Ownership After the Offering |  |  |  |  | 28.30% |  |  |  |  |  |  |  |
Teekay Corporation [Member] | Ship to Ship Transfer Business [Member] | Class B [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Subsidiary, Sale of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Offering Price (In dollars per share) | $ / shares |  |  |  |  | $ 6.99 |  |  |  |  |  |  |  |
Purchase price consideration |  |  |  |  | $ 45,500 |  |  |  |  |  |  |  |
Business acquisition, common share price per share agreed upon (in Norwegian krone per share) | $ / shares |  |  |  |  | $ 6.99 |  |  |  |  |  |  |  |
Teekay Corporation [Member] | Principal Maritime Tankers [Member] | Class A [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Subsidiary, Sale of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Number of Common Stock Issued (in shares) | shares |  |  |  |  |  |  |  |  |  |  |  | 4,500,000 |
Teekay Corporation [Member] | Principal Maritime Tankers [Member] | Class A [Member] | Suezmax Tankers [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Subsidiary, Sale of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Number of Common Stock Issued (in shares) | shares |  |  |  |  |  |  |  |  |  |  |  | 13,600,000 |
Net Proceeds |  |  |  |  |  |  |  |  |  |  |  | $ 90,600 |
Teekay Corporation [Member] | Principal Maritime Tankers [Member] | Private Placement [Member] | Class A [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Subsidiary, Sale of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Number of Common Stock Issued (in shares) | shares |  |  |  | 4,500,000 |  |  |  |  |  |  |  |  |
Conventional Tankers [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Subsidiary, Sale of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Number of Common Stock Issued (in shares) | shares |  |  |  | 13,630,075 |  |  | 3,000,000 | 24,166,666 |  | 7,180,083 |  |  |
Gross Proceeds |  |  |  | $ 90,640 |  |  | $ 13,716 | $ 116,000 |  | $ 49,268 |  |  |
Net Proceeds |  |  |  | $ 90,640 |  |  | $ 13,685 | $ 111,190 |  | $ 49,268 |  |  |
Conventional Tankers [Member] | Continuous Offering [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Subsidiary, Sale of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Number of Common Stock Issued (in shares) | shares |  |  |  |  |  |  |  |  |  |  | 3,020,000 | 13,391,100 |
Gross Proceeds |  |  |  |  |  |  |  |  |  |  | $ 7,747 | $ 94,594 |
Net Proceeds |  |  |  |  |  |  |  |  |  |  | $ 7,558 | $ 92,439 |
Conventional Tankers [Member] | Teekay Corporation [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Subsidiary, Sale of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Teekay's Ownership After the Offering |  |  |  | 28.80% |  |  | 25.50% | 26.20% |  | 26.20% |  |  |
Teekay Tanker Operations Ltd [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Subsidiary, Sale of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Number of Common Stock Issued (in shares) | shares |  |  |  |  |  |  |  |  | 4,220,945 |  |  |  |
Gross Proceeds |  |  |  |  |  |  |  |  | $ 17,010 |  |  |  |
Net Proceeds |  |  |  |  |  |  |  |  | $ 17,010 |  |  |  |
Business Acquisition, Percentage of Voting Interests Acquired |  |  |  |  |  |  |  | 50.00% | 50.00% |  |  |  | 50.00%
Teekay Tanker Operations Ltd [Member] | Teekay Corporation [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Subsidiary, Sale of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Teekay's Ownership After the Offering |  |  |  |  |  |  |  |  | 28.70% |  |  |  |
Teekay Tanker Operations Ltd [Member] | Teekay Corporation [Member] | Class B [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Subsidiary, Sale of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition, Percentage of Voting Interests Acquired |  |  |  |  |  |  |  |  | 50.00% |  |  |  |
Purchase price consideration |  |  |  |  |  |  |  |  | $ 15,600 |  |  |  |
Business acquisition, common share price per share agreed upon (in dollars per share) | $ / shares |  |  |  |  |  |  |  |  | $ 3.7 |  |  |  |

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