Pension and Other Post-Retirement Benefit Plans (Detail) - Pension Plan - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
U.S. Pension Plans and Other Post-Retirement Benefit Plans
Defined Benefit Plan Disclosure [Line Items]
Interest cost	$ 217	$ 418	$ 1,107	$ 1,254
Expected return on plan assets	(470)	(787)	(1,794)	(2,360)
Amortization of prior service cost	23	2	2,517	5
Recognized actuarial loss	75	69	262	206
Net cost (benefit)	(155)	(298)	2,092	(895)
Non-U.S. Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Interest cost	268	265	831	821
Expected return on plan assets	(268)	(310)	(834)	(960)
Amortization of prior service cost	12	0	36	0
Recognized actuarial loss	129	126	397	393
Net cost (benefit)	$ 141	$ 81	$ 430	$ 254