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Schedule of Net Periodic Pension and Postretirement (income) Cost (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
United States Pension Plans, Defined Benefit      
Defined Benefit Plan Disclosure      
Service cost $ 2,462 $ 2,218 $ 2,393
Interest cost 13,142 12,875 11,318
Expected return on plan assets (14,517) (12,500) (13,632)
Amortization of prior service cost 134 135 164
Net actuarial loss (gain) 10,596 43,168 (7,063)
Total net periodic pension cost (income) 11,817 45,896 (6,820)
Prior service cost (134) (135) (164)
Total recognized in other comprehensive income (134) (135) (164)
Total recognized in net periodic pension cost (income) and other comprehensive income 11,683 45,761 (6,984)
Foreign Pension Plans, Defined Benefit      
Defined Benefit Plan Disclosure      
Service cost 1,006 897 1,034
Interest cost 1,444 1,837 1,948
Expected return on plan assets (781) (868) (959)
Net actuarial loss (gain) 8,415 4,651 (1,252)
Curtailment (634)    
Total net periodic pension cost (income) 9,450 6,517 771
Total recognized in net periodic pension cost (income) and other comprehensive income 9,450 6,517 771
Postretirement Benefit Plans      
Defined Benefit Plan Disclosure      
Service cost 48 59 75
Interest cost 237 335 342
Amortization of prior service cost (598) (598) (598)
Net actuarial loss (gain) (648) (1,255) (2,025)
Total net periodic pension cost (income) (961) (1,459) (2,206)
Prior service cost 598 598 598
Total recognized in other comprehensive income 598 598 598
Total recognized in net periodic pension cost (income) and other comprehensive income $ (363) $ (861) $ (1,608)