Items to be Recognized in 2016 as Component of Net Periodic Cost (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Foreign Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Accumulated benefit obligations in excess of plan assets, projected benefit obligation	$ 60,100	$ 77,400
Items to be recognized in 2016 as a component of net periodic cost
Defined Benefit Plan, Pension Plans with Accumulated Benefit Obligations in Excess of Plan Assets, Aggregate Accumulated Benefit Obligation	55,800	$ 71,100
Pension Benefits [Member]
Items to be recognized in 2016 as a component of net periodic cost
Net actuarial loss (gain)	8,340
Prior service cost (credit)	608
Net periodic cost (credit) to be recorded in 2016	8,948
Other Postretirement Benefits [Member]
Items to be recognized in 2016 as a component of net periodic cost
Net actuarial loss (gain)	(561)
Prior service cost (credit)	(3,398)
Net periodic cost (credit) to be recorded in 2016	$ (3,959)