Impact of the Company's Hedges Not Designated as Hedging (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Derivative [Line Items]
Derivatives Not Designated as Hedging, Gains (Losses)	$ 11,216	$ (69,937)
Foreign Exchange Forward | Other Expense
Derivative [Line Items]
Derivatives Not Designated as Hedging, Gains (Losses)	(1,224)	(2,921)
DIO Corporation | Other Expense
Derivative [Line Items]
Derivatives Not Designated as Hedging, Gains (Losses)	272	383
Interest Rate Contract | Other Expense
Derivative [Line Items]
Derivatives Not Designated as Hedging, Gains (Losses)	12,323	(67,213)
Interest Rate Contract | Interest Expense
Derivative [Line Items]
Derivatives Not Designated as Hedging, Gains (Losses)	$ (155)	$ (186)