Information Related to Changes in Projected Benefit Obligation (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011		Dec. 31, 2010		Dec. 31, 2009
Defined Benefit Plan Disclosure [Line Items]
Projected benefit obligation at beginning of year	$ 19,730	[1]	$ 14,358	[1]	$ 13,286
Service cost	1,890		1,875		1,465
Interest cost	1,010		840		742
Actuarial (gain) loss	(948)		1,100		(1,034)
Addition of foreign pension plan			1,961	[2]
Benefits paid	(390)	[3]	(220)	[3]	(562)	[3]
Foreign currency impact	(132)		(184)		461
Projected benefit obligation at end of year	$ 21,160	[1]	$ 19,730	[1]	$ 14,358	[1]

[1] Measured as of December 31.

[2] The Company adopted the defined benefit pension plan accounting provisions of FASB ASC Topics 715 and 960 for a non-U.S. plan on December 31, 2010. Previously the Company had accounted for this plan in accordance with local statutory accounting requirements. The adoption of FASB ASC Topics 715 and 960 for this plan did not result in the recognition of additional expense.

[3] The Company projects the following amounts will be paid in future years to plan participants: $0.4 million in 2012; $1.2 million in 2013; $1.3 million in 2014; $0.8 million in 2015; $0.9 million in 2016; and $6.5 million in the five years thereafter.