Retirement Benefits - 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, 2014	Mar. 31, 2013
U.S.
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost	$ 323	$ 437
Interest cost	1,053	943
Expected return on plan assets	(1,408)	(1,353)
Net amortization	699	1,614
Net periodic benefit cost	667	1,641
Non-U.S.
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost	374	339
Interest cost	599	519
Expected return on plan assets	(327)	(256)
Net amortization	219	230
Net periodic benefit cost	865	832
Other Postretirement Benefit Plans
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost	178	242
Interest cost	233	227
Net amortization	(118)	6
Net periodic benefit cost	$ 293	$ 475