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Employee Benefit Plans	12 Months Ended
Employee Benefit Plans	Dec. 31, 2013
Defined Contribution Pension and Other Postretirement Plans Disclosure [Abstract]
Employee Benefit Plans	Employee Benefit Plans We sponsor a defined contribution retirement plan ("the Plan") for our U.S. employees, which has been determined by the IRS to qualify as a 401(k) plan. The Plan provides for voluntary tax-deferred contributions of up to 100% of gross compensation, subject to certain IRS limitations. The Plan also includes an employer contribution. During 2011, 2012 and 2013, contribution expense recognized for our U.S. plan was $3.9 million, $4.8 million and $6.5 million, respectively. We also sponsor non-mandatory defined contribution plans for our international employees. Pursuant to these plans, we contribute a certain percentage of the employee’s salary. During 2011, 2012 and 2013, contribution expense recognized for our international plans was $1.9 million, $2.6 million and $3.8 million, respectively.