Pension Plans and Other Postretirement Benefits - Domestic and Foreign Pension and Postretirement Defined Benefit Plans (Parenthetical) (Detail) (Change in Assumptions for Pension Plans, USD $) In Thousands, unless otherwise specified	3 Months Ended	9 Months Ended
	Jun. 30, 2012	Sep. 30, 2013
Change in Assumptions for Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Actuarial gain	$ 10,300	$ 10,300