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

Quarterly report pursuant to Section 13 or 15(d)

Cover
- Document and Entity Information
Financial Statements
Notes to Financial Statements
Accounting Policies
- Basis of Presentation (Policies)
Notes Tables
Notes Details

Basis of Presentation - Additional Information (Details)

v3.5.0.2

Basis of Presentation - Additional Information (Details) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2016 USD ($)	Sep. 30, 2015 USD ($)	Sep. 30, 2016 USD ($) $ / bbl $ / MMBTU	Sep. 30, 2015 USD ($)	Dec. 31, 2015 USD ($)	Sep. 07, 2016 USD ($)	Mar. 31, 2016 USD ($)
Basis Of Presentation [Line Items]
Additional security aggregate amount							$ 260,800
Percentage of discount from proved reserves			10.00%
Ceiling test write-down of oil and natural gas properties	$ 57,912	$ 441,688	$ 279,063	$ 954,850	$ 987,200
SEC Methodology \| Natural Gas
Basis Of Presentation [Line Items]
Weighted price \| $ / MMBTU			2.28
SEC Methodology \| Crude Oil Per Barrel
Basis Of Presentation [Line Items]
Weighted price \| $ / bbl			38.17
8.50% Unsecured Senior Notes, Due June 2019
Basis Of Presentation [Line Items]
Debt instrument interest rate	8.50%		8.50%		8.50%	8.50%
Debt instrument aggregate principle amount	$ 189,829		$ 189,829		$ 900,000
Debt instrument, exchange offer terms			Approximately $710.2 million, or 79%, of our 8.50% Unsecured Senior Notes due 2019 (the “Unsecured Senior Notes”) for new secured notes and common stock. At the same time, we closed on a new $75.0 million, 11.00% 1.5 Lien Term Loan (the “1.5 Lien Term Loan”), and in conjunction; two amendments were made effective under our Credit Agreement.
11.00% 1.5 Lien Term Loan, Due November 2019
Basis Of Presentation [Line Items]
Debt instrument interest rate						11.00%
Debt instrument aggregate principle amount						$ 75,000
Exchange Transaction \| 8.50% Unsecured Senior Notes, Due June 2019
Basis Of Presentation [Line Items]
Debt instrument aggregate principle amount						$ 710,200
Percentage of debt instrument tendered						79.00%

- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition

The expense recorded to reduce the value of oil and gas assets consisting of proved properties and unproved properties as the estimate of future successful production from these properties is reduced.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
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Additional security aggregate amount.

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Basis of presentation.

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Description of the exchange transaction of unsecured debt for secured debt and common stock.

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Percentage of debt instrument exchanged for second and third lien notes and common stock.

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Present value computation discount rate.

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- Definition

Weighted average prices used to estimate reserves.

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