Quarterly report pursuant to Section 13 or 15(d)

Hedges Included in Consolidated Statements of Income (Detail)

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Hedges Included in Consolidated Statements of Income (Detail) (Not Designated as Hedging Instrument, Fair Value Hedging, Miscellaneous Income (Expense), Foreign Exchange Contract, USD $)
In Thousands, unless otherwise specified
6 Months Ended
Jun. 30, 2012
Not Designated as Hedging Instrument | Fair Value Hedging | Miscellaneous Income (Expense) | Foreign Exchange Contract
 
Derivative Instruments, Gain (Loss) [Line Items]  
Gain (Loss) on Derivatives Recognized in Income $ 1,376