Components of Net Periodic Benefit Cost for Defined Benefit Plans and Other Postretirement Plans (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
U.S.
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost	$ 437	$ 486
Interest cost	943	1,092
Expected return on plan assets	(1,353)	(1,211)
Net amortization	1,614	1,591
Net periodic benefit cost	1,641	1,958
Non-U.S.
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost	339	342
Interest cost	519	557
Expected return on plan assets	(256)	(257)
Net amortization	230	83
Net periodic benefit cost	832	725
Other Postretirement Benefit Plans
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost	242	190
Interest cost	227	229
Net amortization	6	(37)
Net periodic benefit cost	$ 475	$ 382