Pensions, Other Post Retirement and Post Employment Benefits - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014		Dec. 31, 2013
Defined Benefit Plan Disclosure [Line Items]
Unfunded plan amount	$ 51,200		$ 51,500
Defined Benefit Plans
Defined Benefit Plan Disclosure [Line Items]
Funded status	$ 80,685	[1]	$ 67,551	[1]

[1] In accordance with Topic 715, $3,568 and $3,803 of this amount is recorded in accrued expenses as of December 31, 2014 and 2013, respectively.