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Asset Impairments and Loss on Sales of Vessels, Equipment and Other Operating Assets - Net (Loss) Gain on Sale of Vessels, Equipment and Other Operating Assets (Detail) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Property, Plant and Equipment [Line Items] |  |  |
Net loss on sale of vessels, equipment and other operating assets (note 18b) | $ (38,084) | $ (66,450) | $ (2,431)
Other |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Net loss on sale of vessels, equipment and other operating assets (note 18b) | (29) | 48 | (177)
Teekay Parent | Conventional Tankers | VLCC |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Net loss on sale of vessels, equipment and other operating assets (note 18b) | 0 | (12,495) | 0
Teekay Offshore | Offshore Logistics | FSO |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Net loss on sale of vessels, equipment and other operating assets (note 18b) | 0 | (983) | 0
Teekay Offshore | Offshore Logistics | 2 Shuttle Tankers |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Net loss on sale of vessels, equipment and other operating assets (note 18b) | 0 | 6,817 | 1,643
Teekay Offshore | Offshore Logistics | 2 Conventional Tankers |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Net loss on sale of vessels, equipment and other operating assets (note 18b) | 0 | 65 | (3,897)
Teekay LNG | Conventional Tankers | Suezmax |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Net loss on sale of vessels, equipment and other operating assets (note 18b) | (25,100) | 0 | 0
Teekay LNG | Conventional Tankers | Suezmaxes Tankers Two |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Net loss on sale of vessels, equipment and other operating assets (note 18b) | 0 | (11,537) | 0
Teekay LNG | Conventional Tankers | Suezmaxes Tankers Three |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Net loss on sale of vessels, equipment and other operating assets (note 18b) | 0 | (27,439) | 0
Teekay Tankers | Conventional Tankers | Suezmax |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Net loss on sale of vessels, equipment and other operating assets (note 18b) | (1,797) | (6,276) | 0
Teekay Tankers | Conventional Tankers | Aframax Tanker |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Net loss on sale of vessels, equipment and other operating assets (note 18b) | (11,158) |  |
Teekay Tankers | Conventional Tankers | MR Tanker |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Net loss on sale of vessels, equipment and other operating assets (note 18b) | $ 0 | $ (14,650) | $ 0

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- Definition Amount of gain (loss) on sale or disposal of property, plant and equipment assets, excluding oil and gas property and timber property. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=64827811&loc=d3e1361-107760 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=84176398&loc=d3e2941-110230 + Details
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