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)

v2.4.1.9

Basis of Presentation - Additional Information (Details) (USD $)	3 Months Ended		0 Months Ended	1 Months Ended	0 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Apr. 23, 2015	Apr. 30, 2015	May 05, 2015	Dec. 31, 2014
Basis Of Presentation [Line Items]
Percentage of discount from proved reserves	10.00%wti_PresentValueDiscountedPercentage
Ceiling test write-down of oil and natural gas properties	$ 260,390,000us-gaap_ImpairmentOfOilAndGasProperties	$ 0us-gaap_ImpairmentOfOilAndGasProperties
Aggregate principal amount of existing notes	900,000,000us-gaap_UnsecuredLongTermDebt					900,000,000us-gaap_UnsecuredLongTermDebt
Subsequent Event
Basis Of Presentation [Line Items]
Reduction of base rate			0.33
Aggregate principal amount of existing notes			900,000,000
Revolving Bank Credit Facility Due November 2018 \| Subsequent Event
Basis Of Presentation [Line Items]
Revolving bank credit facility borrowing base			600,000,000	600,000,000
Reduction of base rate				0.33
Aggregate principal amount of existing notes				900,000,000
Second Lien Term Loan \| Subsequent Event
Basis Of Presentation [Line Items]
Revolving bank credit facility borrowing base					500,000,000
Term loan					$ 300,000,000
Debt instrument term					5 years

- Definition

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

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- Definition

Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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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.

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Amount of current borrowing capacity under the credit facility considering any current restrictions on the amount that could be borrowed (for example, borrowings may be limited by the amount of current assets), but without considering any amounts currently outstanding under the facility.

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Carrying value as of the balance sheet date of uncollateralized debt obligation (with maturities initially due after one year or beyond the operating cycle if longer), excluding current portion.

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- Definition

Borrowing base reduction ratio per dollar.

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- Definition

Present value discounted percentage.

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