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

Employee Benefit Plan	12 Months Ended
Employee Benefit Plan	Dec. 31, 2015
Compensation And Retirement Disclosure [Abstract]
Employee Benefit Plan	12. Employee Benefit Plan We maintain a defined contribution benefit plan in compliance with Section 401(k) of the IRC (the “401(k) Plan”), which covers those employees who meet the 401(k) Plan’s eligibility requirements. During 2015, 2014 and 2013, the Company’s matching contribution was 100% of each participant’s contribution up to a maximum of 6% of the participant’s eligible compensation, subject to limitations imposed by the IRC. The 401(k) Plan provides 100% vesting in Company match contributions on a pro rata basis over five years of service (20% per year). Our expenses relating to the 401(k) Plan were $2.3 million, $2.4 million and $2.1 million for 2015, 2014 and 2013, respectively.