Employee Benefits - Amounts Recognized in Balance Sheet (Detail) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Defined Benefit Plan Disclosure [Line Items]
Other assets	$ 4,343	$ 4,906
Retirement liabilities	(243,407)	(242,383)
U.S. Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Other assets	4,343	0
Other current liabilities	(4,027)	(3,866)
Retirement liabilities	(51,684)	(83,334)
Net amount recognized	(51,368)	(87,200)
Non-U.S. Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Other assets	0	4,096
Other current liabilities	(557)	(613)
Retirement liabilities	(102,871)	(73,109)
Net amount recognized	$ (103,428)	$ (69,626)