Impact of the Company's Hedges Not Designated as Hedging (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010
Derivative [Line Items]
Derivatives Not Designated as Hedging, Gains (Losses)	$ (69,937)	$ 1,026
Foreign Exchange Forward | Other Expense
Derivative [Line Items]
Derivatives Not Designated as Hedging, Gains (Losses)	(2,921)	1,181
DIO Corporation | Other Expense
Derivative [Line Items]
Derivatives Not Designated as Hedging, Gains (Losses)	383
Interest Rate Contract | Other Expense
Derivative [Line Items]
Derivatives Not Designated as Hedging, Gains (Losses)	(68,432)
Interest Rate Contract | Interest Expense
Derivative [Line Items]
Derivatives Not Designated as Hedging, Gains (Losses)	(186)	(155)
Interest Rate Contract | Interest Income
Derivative [Line Items]
Derivatives Not Designated as Hedging, Gains (Losses)	$ 1,219