Quarterly report pursuant to Section 13 or 15(d)

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

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Fair Value Measurements and Derivatives - Effects of Foreign Currency Collar Designated as Cash Flow Hedges (Detail) (Cash Flow Hedging, Designated as Hedging Instrument, Foreign Currency Collar, 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 Currency Collar
       
Derivative Instruments, Gain (Loss) [Line Items]        
Gain (loss) recognized in other comprehensive income - effective portion    $ 4,518 $ (1,588) $ 2,243
Amount reclassified from accumulated other comprehensive income (loss) into depreciation and amortization expense $ (91)    $ (242)