Pension and Other Postretirement Benefits - Net Periodic Pension and Other Postretirement Benefit Costs (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
U.S. Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 4,424	$ 3,943	$ 3,115
Interest cost	8,070	8,514	8,867
Expected return on plan assets	(9,368)	(9,556)	(9,658)
Amortization of prior service cost	640	668	656
Amortization of actuarial loss	7,146	6,087	4,236
Net cost	10,912	9,656	7,216
Foreign Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	0	0	0
Interest cost	2,551	2,506	2,589
Expected return on plan assets	(2,485)	(2,101)	(2,311)
Amortization of prior service cost	0	0	0
Amortization of actuarial loss	687	598	496
Net cost	753	1,003	774
Other Postretirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	943	804	643
Interest cost	926	919	1,020
Expected return on plan assets	0	0	0
Amortization of prior service cost	85	85	86
Amortization of actuarial loss	241	71	256
Net cost	$ 2,195	$ 1,879	$ 2,005