Impact of Derivative Instruments on Condensed Consolidated Statements of Income and OCI (Detail) (USD $) In Thousands, unless otherwise specified	9 Months Ended	12 Months Ended	3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended			12 Months Ended	9 Months Ended	12 Months Ended
	Sep. 30, 2012	Dec. 31, 2011	Sep. 30, 2012 Interest Expense	Sep. 30, 2011 Interest Expense	Sep. 30, 2012 Interest Expense	Sep. 30, 2011 Interest Expense	Sep. 30, 2012 Cost of Sales	Sep. 30, 2011 Cost of Sales	Sep. 30, 2012 Cost of Sales	Sep. 30, 2011 Cost of Sales	Sep. 30, 2012 Interest Rate Contract	Dec. 31, 2011 Interest Rate Contract	Sep. 30, 2012 Foreign Exchange Contract	Dec. 31, 2011 Foreign Exchange Contract
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Net Gain (Loss) Recognized in Accumulated OCI (Effective Portion)	$ (32,908)	$ (23,702)									$ (32,510)	$ (23,289)	$ (398)	$ (413)
Amount of Gain (Loss) Reclassified from Accumulated OCI into Income (Effective Portion)			$ 998	$ 461	$ 1,849	$ 1,385	$ (9)	$ 2	$ (26)	$ 2