Gains and Losses, Net of Tax, Related to Derivative Instruments Designated as Cash Flow Hedges Included in the Accumulated Other Comprehensive Income, Net (Detail) (Cash Flow Hedging, USD $) In Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Derivative Instruments, Gain (Loss) [Line Items]
Amount of gain (loss) recognized in OCI	$ 11,878	$ (3,335)	$ 8,588	$ 426
Interest Rate Contract
Derivative Instruments, Gain (Loss) [Line Items]
Amount of gain (loss) recognized in OCI	(6)	101	68	279
Foreign Exchange Contract
Derivative Instruments, Gain (Loss) [Line Items]
Amount of gain (loss) recognized in OCI	$ 11,884	$ (3,436)	$ 8,520	$ 147