Pension and Postretirement Benefits - Schedule of Amounts Recognized in Accumulated Other Comprehensive Income (Detail) (Pension Plans [Member], USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2013	Dec. 31, 2012
Pension Plans [Member]
Pension Plans, Postretirement and Other Employee Benefits [Line Items]
Net gain	$ (40,286)	$ (35,703)
Prior service cost	7,251	9,790
Translation difference	147	(437)
Total amount recognised in AOCI	$ (32,888)	$ (26,350)

After tax total of net gain (loss), prior service cost (credit), and transition assets (obligations), as well as minimum pension liability if still remaining, included in accumulated other comprehensive income associated with a defined benefit pension or other postretirement plan(s).

No definition available.

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant