Employee Benefits - Accumulated Benefit Obligation (Detail) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
U.S. Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Accumulated Benefit Obligation — end of year	$ 574,612	$ 583,346
Projected benefit obligation	65,101	587,511
Accumulated benefit obligation	65,101	583,346
Fair value of plan assets	$ 9,389	$ 500,311
Discount rate	4.20%	3.90%
Rate of compensation increase	3.25%	3.25%
Non-U.S. Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Accumulated Benefit Obligation — end of year	$ 865,585	$ 837,272
Projected benefit obligation	895,566	609,922
Accumulated benefit obligation	865,585	586,954
Fair value of plan assets	$ 790,218	$ 536,200
Discount rate	2.14%	3.03%
Rate of compensation increase	1.97%	1.98%