Schedule of Restructuring Accruals Expenses (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]
Beginning Balance	$ 5,875	$ 3,543
Restructuring Cost	32,473	12,314	11,095
Payments, utilization and other	(27,461)	(9,982)
Ending Balance	10,887	5,875	3,543
2011 restructuring initiative
Restructuring Cost and Reserve [Line Items]
Beginning Balance	5,875
Restructuring Cost	32,473	12,314
Payments, utilization and other	(27,461)	(6,439)
Ending Balance	10,887	5,875
2009 restructuring initiative
Restructuring Cost and Reserve [Line Items]
Beginning Balance		3,543
Restructuring Cost			11,100
Payments, utilization and other		(3,543)
Ending Balance			$ 3,543