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Employee Benefit Plans
12 Months Ended
Dec. 31, 2011
Employee Benefit Plans
10. EMPLOYEE BENEFIT PLANS

We have multiple qualified defined contribution plans, which allow for voluntary pre-tax contributions by employees. We pay all general and administrative expenses of the plans and may make contributions to the plans. Based on 100% of the first 1% and 50% of the next 5% of compensation deferred by employees (subject to IRS limits and non-discrimination testing), we made matching contributions of $3.7 million, $3.4 million, and $3.7 million, to the plans for the years ended December 31, 2011, 2010 and 2009, respectively. The plans provide for discretionary contributions by us, as approved by the Board of Directors. There have been no such discretionary contributions through December 31, 2011. In addition, we made contributions to our international pension plans of $0.8 million for the year ended December 31, 2011 and $0.4 million for each of the year ended December 31, 2010 and 2009.