W&T Offshore, Inc. Annual report pursuant to Section 13 and 15(d)

Note 1 - Significant Accounting Policies (Details Textual)

v3.19.3.a.u2

Note 1 - Significant Accounting Policies (Details Textual) xbrli-pure in Thousands, $ in Thousands		3 Months Ended	12 Months Ended
	Oct. 18, 2018 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)
Gas Balancing Asset (Liability)		$ (4,100)	$ (3,600)	$ (4,100)
Impairment of Oil and Gas Properties			$ 0	0	$ 0
Proved Undeveloped Reserves Classification, Period to be Drilled			5 years
Gain (Loss) on Extinguishment of Debt, Total		$ 47,100		47,109	$ 7,811
Refinancing Transaction [Member]
Gain (Loss) on Extinguishment of Debt, Total	$ 47,100			$ 47,100
11.00% 1.5 Lien Term Loan Due November 2019 [Member]
Interest Expense, Debt, Total						$ 0
Interest Rate Contract [Member]
Derivative, Number of Instruments Held, Total		0	0	0	0
Furniture, Fixtures and Non-oil and Natural Gas Property and Equipment [Member] \| Minimum [Member]
Property, Plant and Equipment, Useful Life			5 years
Furniture, Fixtures and Non-oil and Natural Gas Property and Equipment [Member] \| Maximum [Member]
Property, Plant and Equipment, Useful Life			7 years

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The number of derivative instruments of a particular group held by the entity.

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Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

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