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Employee Benefit Plans	12 Months Ended
Employee Benefit Plans	Dec. 31, 2014
Postemployment Benefits [Abstract]
Employee Benefit Plans	8. Employee Benefit Plans The Company has a defined-contribution 401(k) plan covering domestic employees and a defined-contribution pension plan covering certain foreign employees. The Company generally makes contributions to the plans equal to each participant’s eligible contributions for the plan year up to a specified percentage of the participant’s annual compensation. The Company’s contribution expense was $5.9 million, $4.9 million and $4.4 million in 2014, 2013 and 2012, respectively.