Components of Net Periodic Benefit Cost for Defined Benefit Plans and Other Postretirement Plans (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
U.S.
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost	$ 381	$ 239	$ 1,144	$ 1,272
Interest cost	673	876	2,825	3,051
Expected return on plan assets	(1,326)	(964)	(3,989)	(3,361)
Net amortization	1,491	817	4,482	4,244
Net periodic benefit cost	1,219	968	4,462	5,206
Non-U.S.
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost	373	328	1,057	1,006
Interest cost	593	527	1,645	1,632
Expected return on plan assets	(298)	(256)	(814)	(773)
Net amortization	263	77	731	244
Net periodic benefit cost	931	676	2,619	2,109
Other Postretirement Benefit Plans
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost	241	191	726	572
Interest cost	226	230	680	687
Net amortization	6	(37)	17	(111)
Net periodic benefit cost	$ 473	$ 384	$ 1,423	$ 1,148