Pension and Other Postretirement Benefits - Schedule of Amounts Recognized in the Balance Sheets (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Employee benefit obligations:
Employee benefit obligations (noncurrent)	$ (49,146)	$ (96,100)
U.S. Pension Benefits [Member]
Employee benefit obligations:
Accrued payrolls and employee benefits (current)	(51)	(25)
Employee benefit obligations (noncurrent)	(17,470)	(56,814)
Employee benefit obligations current and non current	(17,521)	(56,839)
Foreign Pension Benefits [Member]
Employee benefit obligations:
Accrued payrolls and employee benefits (current)	0	(152)
Employee benefit obligations (noncurrent)	(12,294)	(17,183)
Employee benefit obligations current and non current	(12,294)	(17,335)
Other Postretirement Benefits [Member]
Employee benefit obligations:
Accrued payrolls and employee benefits (current)	(752)	(738)
Employee benefit obligations (noncurrent)	(19,377)	(22,068)
Employee benefit obligations current and non current	$ (20,129)	$ (22,806)