Quarterly report pursuant to Section 13 or 15(d)

Effects of Foreign Currency Forward Contracts Designated as Cash Flow Hedges (Detail)

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Effects of Foreign Currency Forward Contracts Designated as Cash Flow Hedges (Detail) (Cash Flow Hedging, Foreign Exchange Forward, USD $)
In Thousands, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 30, 2013
Sep. 30, 2012
Sep. 30, 2013
Sep. 30, 2012
Cash Flow Hedging | Foreign Exchange Forward
       
Derivative Instruments, Gain (Loss) [Line Items]        
Gain (loss) recognized in other comprehensive loss - effective portion   $ 2,609 $ (7,886) $ 4,332
Gain recognized in other income (expense) - ineffective portion     66  
Amount reclassified from accumulated comprehensive income (loss) into depreciation and amortization expense $ (32)   $ (52)