Pension and Other Post-Retirement Benefit Plans (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
U.S. Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 32	$ 29	$ 96	$ 86
Interest cost	469	463	1,407	1,390
Expected return on plan assets	(678)	(668)	(2,034)	(2,005)
Amortization of prior service cost	0	0	0	0
Recognized actuarial loss (gain)	107	117	321	351
Net (benefit) cost	(70)	(59)	(210)	(178)
Non-U.S. Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Service cost	0	0	0	0
Interest cost	338	372	1,041	1,116
Expected return on plan assets	(375)	(403)	(1,156)	(1,209)
Amortization of prior service cost	0	0	0	0
Recognized actuarial loss (gain)	52	69	160	209
Net (benefit) cost	15	38	45	116
Other Post-Retirement Benefit Plans
Defined Benefit Plan Disclosure [Line Items]
Service cost	0	0	0	0
Interest cost	4	4	12	13
Expected return on plan assets	0	0	0	0
Amortization of prior service cost	2	2	6	5
Recognized actuarial loss (gain)	(26)	(30)	(78)	(90)
Net (benefit) cost	$ (20)	$ (24)	$ (60)	$ (72)