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Schedule of Defined Benefit Pension and Postretirement Benefit Plan Assets and Obligation (Detail) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Defined Benefit Plan Disclosure          
Actuarial (gain) loss $ (17,732) $ (46,564) $ (17,732) $ (46,564) $ 10,340
Ending Balance 326,600   326,600    
United States Pension Plans, Defined Benefit          
Defined Benefit Plan Disclosure          
Projected benefit obligation, Beginning of year     367,619 293,912  
Service cost     2,462 2,218 2,393
Interest cost     13,142 12,875 11,318
Actuarial (gain) loss     (13,221) 72,596  
Benefits paid     (18,885) (13,982)  
Projected benefit obligation, End of year 351,117 367,619 351,117 367,619 293,912
Beginning Balance     316,072 256,373  
Company contributions     10,517 31,753  
Actual return on plan assets     (9,300) 41,928  
Benefits paid     (18,885) (13,982)  
Ending Balance 298,404 316,072 298,404 316,072 256,373
Funded status (52,713) (51,547) (52,713) (51,547)  
Foreign Pension Plans, Defined Benefit          
Defined Benefit Plan Disclosure          
Projected benefit obligation, Beginning of year     58,210 52,182  
Service cost     1,006 897 1,034
Interest cost     1,444 1,837 1,948
Actuarial (gain) loss     7,498 8,975  
Benefits paid     (859) (1,265)  
Curtailment     (634)    
Plan participants' contributions     64 88  
Non-U.S. currency movement     (4,439) (4,504)  
Projected benefit obligation, End of year 62,290 58,210 62,290 58,210 52,182
Beginning Balance     29,511 25,756  
Company contributions     808 1,168  
Plan participants' contributions     64 88  
Actual return on plan assets     (136) 5,192  
Benefits paid     (859) (1,265)  
Admin expenses paid     (43)    
Non-U.S. currency movement     (1,204) (1,428)  
Ending Balance 28,141 29,511 28,141 29,511 25,756
Funded status (34,149) (28,699) (34,149) (28,699)  
Postretirement Benefit Plans          
Defined Benefit Plan Disclosure          
Projected benefit obligation, Beginning of year     7,162 9,019  
Service cost     48 59 75
Interest cost     237 335 342
Actuarial (gain) loss     (648) (1,255)  
Benefits paid     (769) (996)  
Projected benefit obligation, End of year 6,030 7,162 6,030 7,162 $ 9,019
Company contributions     769 996  
Benefits paid     (769) (996)  
Funded status $ (6,030) $ (7,162) $ (6,030) $ (7,162)