Gains and Losses, Net of Tax, Related to Derivative Instruments Designated as Cash Flow Hedges Included in Accumulated Other Comprehensive Income, Net (Detail) (Cash Flow Hedging, USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Recognized in Accumulated OCI on Derivative (Effective Portion)	$ (1,750)	$ 11,878	$ (3,396)	$ 8,588
Interest rate contracts
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Recognized in Accumulated OCI on Derivative (Effective Portion)	(6)	(6)	(18)	68
Foreign currency contracts
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Recognized in Accumulated OCI on Derivative (Effective Portion)	$ (1,744)	$ 11,884	$ (3,378)	$ 8,520