Components of Net Periodic Benefit Cost (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
Interest cost	$ 826	$ 897	$ 1,652	$ 1,794
Expected return on plan assets	(1,074)	(1,054)	(2,148)	(2,108)
Unrecognized net actuarial loss (gain)	475	308	950	616
Total net periodic benefit cost (income)	227	151	454	302
Non-U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
Service cost	284	276	572	538
Interest cost	2,674	3,066	5,348	6,036
Expected return on plan assets	(2,584)	(2,829)	(5,154)	(5,586)
Unrecognized prior service cost	9	10	18	19
Unrecognized net actuarial loss (gain)	311	224	620	443
Total net periodic benefit cost (income)	694	747	1,404	1,450
Other Postretirement Benefits
Defined Benefit Plan Disclosure [Line Items]
Service cost	7	8	14	15
Interest cost	181	193	363	386
Unrecognized prior service cost	(15)	(15)	(30)	(30)
Unrecognized net actuarial loss (gain)	(202)	(318)	(404)	(636)
Total net periodic benefit cost (income)	$ (29)	$ (132)	$ (57)	$ (265)