Employee Benefits - Plan Assets and Benefit Obligations of Defined Benefit Pension Plans (Detail) - Pension Plan [Member] - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
U.S Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost for benefits earned	$ 1,971	$ 2,175	$ 2,497
Interest cost on projected benefit obligation	19,393	20,075	24,096
Expected return on plan assets	(30,994)	(35,577)	(33,988)
Net amortization of deferrals	6,592	5,424	5,821
Settlements and curtailments	0	0	0
Net periodic benefit cost	(3,038)	(7,903)	(1,574)
Defined contribution and other retirement plans	10,527	8,604	8,404
Total expense	7,489	701	6,830
Net actuarial loss (gain)	21,050	(12,145)
Recognized actuarial loss	(6,549)	(5,383)
Prior service cost	0	93
Recognized prior service (cost) credit	(43)	(41)
Currency translation adjustment	0	0
Total recognized in OCI (before tax effects)	14,458	(17,476)
Non-U.S. Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost for benefits earned	18,738	18,652	15,210
Interest cost on projected benefit obligation	17,704	17,116	24,413
Expected return on plan assets	(50,546)	(50,626)	(45,865)
Net amortization of deferrals	11,798	14,403	12,802
Settlements and curtailments	0	2,746	0
Net periodic benefit cost	(2,306)	2,291	6,560
Defined contribution and other retirement plans	6,859	5,681	6,304
Total expense	4,553	7,972	$ 12,864
Net actuarial loss (gain)	11,937	(20,557)
Recognized actuarial loss	(12,590)	(17,895)
Prior service cost	2,776	0
Recognized prior service (cost) credit	792	747
Currency translation adjustment	(16,978)	36,722
Total recognized in OCI (before tax effects)	$ (14,063)	$ (983)