Derivatives and Hedging (Detail) - Derivative Gains And Losses That Have Been Recognized In Condensed Consolidated Statements Of Operations (USD $) In Thousands, unless otherwise specified	3 Months Ended				9 Months Ended
	Sep. 30, 2012		Sep. 30, 2011		Sep. 30, 2012		Sep. 30, 2011
DerivativeInstruments Gain Loss Recognized In Income Net	$ 943		$ (954)		$ 2,094		$ 4,894
Interest Expense [Member]
DerivativeInstruments Gain Loss Recognized In Income Net	907	[1]	1,022	[1]	2,657	[1]	3,100	[1]
Other Income And Expense [Member]
DerivativeInstruments Gain Loss Recognized In Income Net	$ 36	[2]	$ (1,976)	[2]	$ (563)	[2]	$ 1,794	[2]

[1] Consists of interest expense from interest rate swap contracts.

[2] Consists of realized and unrealized gains and losses on foreign currency forward contracts.