Pension and Other Post-Retirement Benefit Plans (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
U.S. Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 32	$ 29	$ 64	$ 58
Interest cost	469	463	938	926
Expected return on plan assets	(678)	(668)	(1,356)	(1,336)
Amortization of prior service cost	0	0	0	0
Recognized actuarial loss (gain)	107	117	214	234
Net (benefit) cost	(70)	(59)	(140)	(118)
Non-U.S. Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Service cost	0	0	0	0
Interest cost	350	368	709	736
Expected return on plan assets	(389)	(397)	(787)	(794)
Amortization of prior service cost	0	0	0	0
Recognized actuarial loss (gain)	54	69	109	137
Net (benefit) cost	15	40	31	79
Other Post-Retirement Benefit Plans
Defined Benefit Plan Disclosure [Line Items]
Service cost	0	0	0	0
Interest cost	4	4	8	8
Expected return on plan assets	0	0	0	0
Amortization of prior service cost	2	2	4	4
Recognized actuarial loss (gain)	(26)	(30)	(51)	(60)
Net (benefit) cost	$ (20)	$ (24)	$ (39)	$ (48)