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Retirement Plans - Additional Information (Detail) (USD $)
In Millions, unless otherwise specified
3 Months Ended
Mar. 31, 2013
United States Pension Plans of US Entity, Defined Benefit
 
Defined Benefit Plan Disclosure  
Contribution to defined benefit pension plans $ 0.4
Foreign Pension Plans, Defined Benefit
 
Defined Benefit Plan Disclosure  
Contribution to defined benefit pension plans $ 0.3