Employee Savings Plan

12 Months Ended

Dec. 31, 2011

Employee Savings Plan

Employee Savings Plan

11.   Employee Savings Plan

        We sponsor a defined contribution plan that qualifies under Section 401(k) of the Internal Revenue Code to provide retirement benefits to substantially all of our employees following the completion of an eligibility period. As allowed under Section 401(k), the plan provides tax-deferred salary deductions for eligible employees. Our matching contributions to the plan for the years ended December 31, 2011, 2010 and 2009 were $4.7 million, $4.4 million and $1.6 million, respectively.