Pension and Postretirement Benefits other than Pensions - Net Periodic Benefit Cost of Defined Benefit Plans and Other Postretirement Benefit Plans (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
U.S. Pension Benefits [Member]
Pension Plans, Postretirement and Other Employee Benefits [Line Items]
Service cost	$ 213	$ 305
Interest cost	3,370	3,052
Expected return on plan assets	(4,764)	(4,342)
Amortization of prior service cost (credit) and recognized actuarial loss (gain)	16	344
Net periodic benefit cost (gain)	(1,165)	(641)
Non-U.S. Pension Benefits [Member]
Pension Plans, Postretirement and Other Employee Benefits [Line Items]
Service cost	861	888
Interest cost	1,802	1,710
Expected return on plan assets	(958)	(949)
Amortization of prior service cost (credit) and recognized actuarial loss (gain)	231	330
Net periodic benefit cost (gain)	1,936	1,979
U.S. Other Postretirement Benefits [Member]
Pension Plans, Postretirement and Other Employee Benefits [Line Items]
Service cost	106	147
Interest cost	397	407
Amortization of prior service cost (credit) and recognized actuarial loss (gain)	(481)	(281)
Other	6	6
Net periodic benefit cost (gain)	28	279
Non-U.S. Other Postretirement Benefits [Member]
Pension Plans, Postretirement and Other Employee Benefits [Line Items]
Service cost	136	168
Interest cost	188	188
Amortization of prior service cost (credit) and recognized actuarial loss (gain)	(71)	(36)
Other	0	0
Net periodic benefit cost (gain)	$ 253	$ 320