Post Retirement Benefit Plans (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
U.S. Defined Benefit Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 106	$ 96
Interest cost	491	542
Expected return on plan assets	(740)	(775)
Net amortization/deferrals	839	806
Net periodic benefit cost	696	669
Discount rate	3.90%	4.30%
Expected long-term rate of return	7.50%	7.50%
Rate of compensation increase	3.00%	3.00%
International Defined Benefit Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Service cost	513	495
Interest cost	1,677	1,772
Expected return on plan assets	(2,122)	(2,029)
Net amortization/deferrals	866	677
Settlement loss recognized		293
Net periodic benefit cost	934	1,208
Discount rate	4.30%	4.96%
Expected long-term rate of return	6.09%	6.12%
Rate of compensation increase	3.10%	3.21%
U.S. Post Retirement
Defined Benefit Plan Disclosure [Line Items]
Service cost	7	9
Interest cost	321	351
Net amortization/deferrals	(212)	(201)
Net periodic benefit cost	116	159
Discount rate	3.90%	4.30%
International Post Retirement
Defined Benefit Plan Disclosure [Line Items]
Service cost	12	11
Interest cost	44	50
Net amortization/deferrals	(77)	(82)
Net periodic benefit cost	$ (21)	$ (21)
Discount rate	4.30%	5.15%