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NON-U.S. EMPLOYEE DEFINED BENEFIT PLANS - Accumulated Benefit Obligation (Details) - USD ($)
$ in Thousands
Dec. 31, 2017
Oct. 27, 2017
Retirement Benefits [Abstract]    
Aggregate projected benefit obligation $ 11,484  
Aggregate accumulated benefit obligation 7,793  
Aggregate fair value of plan assets $ 3,893 $ 3,776