Pension and Other Post-Retirement Benefit Plans (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
U.S. Pension Plans and Other Post-Retirement Benefit Plans
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 33	$ 32
Interest cost	449	473
Expected return on plan assets	(671)	(678)
Amortization of prior service cost	2	2
Recognized actuarial loss	89	82
Net (benefit) cost	(98)	(89)
Non-U.S. Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Service cost	0	0
Interest cost	271	359
Expected return on plan assets	(285)	(398)
Amortization of prior service cost	0	0
Recognized actuarial loss	115	55
Net (benefit) cost	$ 101	$ 16