Employee Benefit Plans - Components of Net Periodic Benefit Cost (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
U.S. Defined Benefit Pension Plans
Net periodic benefit cost
Service cost	$ 84	$ 95	$ 252	$ 285
Interest cost	369	479	1,107	1,437
Expected return on plan assets	(519)	(542)	(1,557)	(1,626)
Net amortization/deferrals	229	266	687	798
Curtailment loss recognized			0	0
Net periodic benefit (credit) cost	$ 163	$ 298	$ 489	$ 894
Assumptions
Discount Rate	4.21%	3.95%	4.21%	3.95%
Expected long-term rate of return	5.70%	5.70%	5.70%	5.70%
Rate of compensation increase	3.00%	3.00%	3.00%	3.00%
International Defined Benefit Pension Plans
Net periodic benefit cost
Service cost	$ 258	$ 506	$ 986	$ 1,518
Interest cost	1,257	1,801	4,193	5,391
Expected return on plan assets	(2,437)	(2,434)	(7,723)	(7,284)
Net amortization/deferrals	397	655	1,452	1,962
Curtailment loss recognized			240	0
Net periodic benefit (credit) cost	$ (525)	$ 528	$ (852)	$ 1,587
Assumptions
Discount Rate	3.56%	3.48%	3.56%	3.48%
Expected long-term rate of return	5.81%	5.79%	5.81%	5.79%
Rate of compensation increase	3.10%	3.10%	3.10%	3.10%
U.S. Post Retirement
Net periodic benefit cost
Service cost	$ 1	$ 2	$ 3	$ 6
Interest cost	97	308	291	924
Net amortization/deferrals	(105)	(234)	(315)	(702)
Net periodic benefit (credit) cost	$ (7)	$ 76	$ (21)	$ 228
Assumptions
Discount Rate	3.95%	3.95%	3.95%	3.95%
International Post Retirement
Net periodic benefit cost
Service cost	$ 7	$ 11	$ 21	$ 33
Interest cost	25	35	75	105
Net amortization/deferrals	(9)	(10)	(27)	(29)
Net periodic benefit (credit) cost	$ 23	$ 36	$ 69	$ 109
Assumptions
Discount Rate	3.90%	3.96%	3.90%	3.96%