Schedule of Net Periodic Pension and Postretirement (income) Cost (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Defined Benefit Plan Disclosure
Net actuarial (gain) loss	$ 8,176	$ (3,316)	$ (6,624)
UNITED STATES
Defined Benefit Plan Disclosure
Service cost	1,608	2,196	2,239
Interest cost	7,189	8,940	13,151
Expected return on plan assets	(6,042)	(9,049)	(12,008)
Amortization of prior service cost		58	70
Net actuarial (gain) loss	2,973	(4,429)	(6,712)
Settlement loss		345
Total net periodic pension cost	5,728	(1,939)	(3,260)
Prior service cost		(58)	(70)
Total recognized in other comprehensive income		(58)	(70)
Total recognized in net periodic pension (income) cost and other comprehensive income	5,728	(1,997)	(3,330)
Foreign Pension Plans, Defined Benefit
Defined Benefit Plan Disclosure
Service cost	751	786	818
Interest cost	691	687	852
Expected return on plan assets	(29)	(19)	(165)
Net actuarial (gain) loss	4,485	743	(310)
Total net periodic pension cost	5,898	2,197	1,195
Total recognized in net periodic pension (income) cost and other comprehensive income	5,898	2,197	1,195
Postretirement Benefit Plans
Defined Benefit Plan Disclosure
Service cost	41	39	34
Interest cost	347	196	201
Amortization of prior service cost	(191)	(373)	(496)
Net actuarial (gain) loss	717	25	398
Special termination benefits		3,708	591
Total net periodic pension cost	914	3,595	728
Prior service cost	191	373	496
Total recognized in other comprehensive income	191	373	496
Total recognized in net periodic pension (income) cost and other comprehensive income	$ 1,105	$ 3,968	$ 1,224