Obligations Related to Capital Leases - Capital Lease Obligations (Detail) $ in Thousands	Dec. 31, 2018 USD ($) vessel	Dec. 31, 2017 USD ($)
Capital Leased Assets [Line Items]
Capital lease obligations	$ 1,673,845	$ 1,160,457
Less current portion	(102,115)	(114,173)
Long-term obligations related to capital leases	$ 1,571,730	1,046,284
Teekay LNG \| LNG Carriers
Capital Leased Assets [Line Items]
Capital Leased Assets, Number of Units \| vessel	8
Capital lease obligations	$ 1,274,569	961,711
Teekay LNG \| Suezmax
Capital Leased Assets [Line Items]
Capital lease obligations	23,987	49,838
Teekay Tankers \| Suezmax
Capital Leased Assets [Line Items]
Capital lease obligations	191,267	148,908
Teekay Tankers \| Aframax Tanker
Capital Leased Assets [Line Items]
Capital lease obligations	157,899	0
Teekay Tankers \| LR2 Tanker
Capital Leased Assets [Line Items]
Capital lease obligations	$ 26,123	$ 0

Amount equal to the present value (the principal) at the beginning of the lease term of minimum lease payments during the lease term (excluding that portion of the payments representing executory costs such as insurance, maintenance, and taxes to be paid by the lessor, together with any profit thereon) net of payments or other amounts applied to the principal through the balance sheet date.

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Amount of capital lease obligation due within one year or the normal operating cycle, if longer.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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The number of units (items of property) under capital lease arrangements.

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