Information Relate to Effect of Derivative Instruments on Our Consolidated Income Statements (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) on derivatives	$ (2,051)	$ (3,564)
Cost of Sales | Foreign Currency Derivatives
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) on derivatives		(15)
Revaluation Of Derivatives | Foreign Currency Derivatives
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) on derivatives	(3,926)	(5,162)
Revaluation Of Derivatives | Currency Related Swap
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) on derivatives	1,491	(3,411)
Revaluation Of Derivatives | Commodity derivatives
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) on derivatives	143	(155)
Revaluation Of Derivatives | Series C Convertible Preferred Stock [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) on derivatives		2,610
Foreign Currency Gain (Loss) | Foreign Currency Derivatives
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) on derivatives	1,875	1,613
Interest Expense [Member] | Interest Rate Swap
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) on derivatives	(57)	(84)
Other Comprehensive Income (Loss)
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) on derivatives	$ (18)	$ (206)