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Employee Benefit Plans
12 Months Ended
Dec. 31, 2011
Employee Benefit Plans [Abstract]  
Employee Benefit Plans
11. Employee Benefit Plans

The Company sponsors defined-contribution, profit-sharing and other benefit plans in the United States, the United Kingdom and France. Total expenses for the plans for the years ended December 31, 2009, 2010 and 2011 were approximately $370,000, $642,000 and $747,000, respectively.