Employee Benefits - Amounts Recognized in Balance Sheet (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Defined Benefit Plan Disclosure [Line Items]
Other assets	$ 75,158	$ 70,792
Retirement liabilities	(227,172)	(228,936)
U.S Plans [Member] | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Other assets	20,949	33,164
Other current liabilities	(4,092)	(4,049)
Retirement liabilities	(46,519)	(49,981)
Net amount recognized	(29,662)	(20,866)
Non-U.S. Plans [Member] | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Other assets	54,434	38,095
Other current liabilities	(882)	(652)
Retirement liabilities	(114,705)	(80,694)
Net amount recognized	$ (61,153)	$ (43,251)