Employee Benefit Plans - Components of Net Periodic Benefit Cost (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
U.S. Defined Benefit Pension Plans
Net periodic benefit cost
Service cost	$ 84	$ 95	$ 168	$ 190
Interest cost	369	479	738	958
Expected return on plan assets	(519)	(542)	(1,038)	(1,084)
Net amortization/deferrals	229	266	458	532
Curtailment loss recognized			0	0
Net periodic benefit cost	$ 163	$ 298	$ 326	$ 596
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	$ 255	$ 506	$ 728	$ 1,012
Interest cost	1,450	1,801	2,936	3,590
Expected return on plan assets	(2,881)	(2,434)	(5,286)	(4,850)
Net amortization/deferrals	435	655	1,055	1,307
Curtailment loss recognized			240	0
Net periodic benefit cost	$ (741)	$ 528	$ (327)	$ 1,059
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	$ 2	$ 4
Interest cost	97	308	194	616
Net amortization/deferrals	(105)	(234)	(210)	(468)
Net periodic benefit cost	$ (7)	$ 76	$ (14)	$ 152
Assumptions
Discount Rate	3.33%	3.95%	3.33%	3.95%
International Post Retirement
Net periodic benefit cost
Service cost	$ 7	$ 11	$ 14	$ 22
Interest cost	25	35	50	70
Net amortization/deferrals	(9)	(10)	(18)	(19)
Net periodic benefit cost	$ 23	$ 36	$ 46	$ 73
Assumptions
Discount Rate	3.24%	3.96%	3.24%	3.96%