Restructuring and Other Charges - Movements in Restructuring and Related Accruals (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Restructuring Cost and Reserve [Line Items]
Balance	$ 10,774	$ 3,977	$ 18,914
Additional charges (reversals), net	1,668	13,172	10,077
Non-cash charges	(292)	(3,139)	(4,409)
Payments and other costs	(9,001)	(3,236)	(20,605)
Balance	3,149	10,774	3,977
Employee-Related [Member]
Restructuring Cost and Reserve [Line Items]
Balance	10,774	3,977	18,914
Additional charges (reversals), net	1,376	8,677	4,370
Payments and other costs	(9,001)	(1,880)	(19,307)
Balance	3,149	10,774	3,977
Pension [Member]
Restructuring Cost and Reserve [Line Items]
Additional charges (reversals), net	292	3,877
Non-cash charges	(292)	(3,139)
Payments and other costs		(738)
Asset-Related And Other [Member]
Restructuring Cost and Reserve [Line Items]
Additional charges (reversals), net		618	5,707
Non-cash charges			(4,409)
Payments and other costs		$ (618)	$ (1,298)