Annual report pursuant to Section 13 and 15(d)

Employee Benefit Plans

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Employee Benefit Plans
12 Months Ended
Dec. 31, 2012
Employee Benefit Plans

12. Employee Benefit Plans

In 1998, our board of directors approved a defined contribution plan that provides retirement benefits under the provisions of Section 401(k) of the Internal Revenue Code. Our 401(k) Plan (“Plan”) covers substantially all employees who meet a minimum service requirement. Under the Plan, we can elect to make voluntary contributions. Contributions of $0.9 million, $0.7 million and $0.5 million were made by us for the years ended December 31, 2012, 2011 and 2010, respectively.