Employee Benefit Plans - Components of Net Periodic Benefit Cost (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
U.S. Defined Benefit Pension Plans
Net periodic benefit cost
Service cost	$ 86	$ 84
Interest cost	356	369
Expected return on plan assets	(433)	(519)
Net amortization/deferrals	248	229
Curtailment loss recognized	0	0
Net periodic benefit cost	$ 257	$ 163
Assumptions
Discount Rate	3.95%	4.21%
Expected long-term rate of return	4.95%	5.70%
Rate of compensation increase	3.00%	3.00%
International Defined Benefit Pension Plans
Net periodic benefit cost
Service cost	$ 614	$ 473
Interest cost	1,677	1,486
Expected return on plan assets	(2,910)	(2,405)
Net amortization/deferrals	685	620
Curtailment loss recognized	0	240
Net periodic benefit cost	$ 66	$ 414
Assumptions
Discount Rate	2.51%	3.56%
Expected long-term rate of return	4.93%	5.81%
Rate of compensation increase	2.54%	3.10%
U.S. Post Retirement
Net periodic benefit cost
Service cost	$ 1	$ 1
Interest cost	88	97
Net amortization/deferrals	(73)	(105)
Net periodic benefit cost	$ 16	$ (7)
Assumptions
Discount Rate	3.76%	3.95%
International Post Retirement
Net periodic benefit cost
Service cost	$ 7	$ 7
Interest cost	24	25
Net amortization/deferrals	(7)	(9)
Net periodic benefit cost	$ 24	$ 23
Assumptions
Discount Rate	3.46%	3.90%