Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements and Derivatives - Effects of Foreign Currency Options Designated as Cash Flow Hedges (Detail)

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Fair Value Measurements and Derivatives - Effects of Foreign Currency Options Designated as Cash Flow Hedges (Detail) (Cash Flow Hedging, Designated as Hedging Instrument, Foreign Exchange Option, USD $)
In Thousands, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 30, 2014
Sep. 30, 2013
Sep. 30, 2014
Sep. 30, 2013
Cash Flow Hedging | Designated as Hedging Instrument | Foreign Exchange Option
       
Derivative Instruments, Gain (Loss) [Line Items]        
Gain (loss) recognized in other comprehensive income - effective portion    $ 1,179 $ (1,157) $ (3,174)
Gain (loss) recognized in other income (expense) - ineffective portion    13 (241) (307)
Amount reclassified from accumulated other comprehensive income (loss) into depreciation and amortization expense $ 330 $ 177 $ 938 $ 294