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Operating income (loss) (Detail) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2018 | Jun. 30, 2017 | Jun. 30, 2018 | Jun. 30, 2017
Segment Reporting Information [Line Items] |  |  |  |
Operating Income (Loss) | $ 1,921 | $ 48,286 | $ 20,426 | $ 129,891
Teekay Offshore | Teekay Offshore | Operating Segments |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Operating Income (Loss) | 0 | 46,218 | 0 | 106,676
Teekay LNG | Operating Segments |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Operating Income (Loss) | 10,505 | 29,871 | 35,647 | 75,949
Teekay LNG | Liquefied Gas Carriers | Operating Segments |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Operating Income (Loss) | 9,445 | 40,043 | 53,990 | 83,379
Teekay LNG | Conventional Tankers | Operating Segments |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Operating Income (Loss) | 1,060 | (10,172) | (18,343) | (7,430)
Teekay Tankers | Conventional Tankers | Operating Segments |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Operating Income (Loss) | (13,415) | 1,587 | (21,836) | 12,328
Teekay Parent | Operating Segments |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Operating Income (Loss) | 4,831 | (29,390) | 6,615 | (65,062)
Teekay Parent | Conventional Tankers | Operating Segments |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Operating Income (Loss) | 0 | (2,988) | 0 | (5,447)
Teekay Parent | Offshore Production | Operating Segments |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Operating Income (Loss) | 5,541 | (18,618) | 12,423 | (39,029)
Teekay Parent | Teekay Parent, Other | Operating Segments |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Operating Income (Loss) | $ (710) | $ (7,784) | $ (5,808) | $ (20,586)

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