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Accumulated Other Comprehensive Loss - Schedule of Accumulated Other Comprehensive Loss (Detail) (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2014
Mar. 31, 2014
Dec. 31, 2013
Jun. 30, 2013
Mar. 31, 2013
Dec. 31, 2012
Equity [Abstract]            
Foreign currency translation adjustments $ (76,662)us-gaap_AccumulatedOtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentNetOfTax   $ (57,326)us-gaap_AccumulatedOtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentNetOfTax      
Derivative adjustments 10,144us-gaap_AccumulatedOtherComprehensiveIncomeLossCumulativeChangesInNetGainLossFromCashFlowHedgesEffectNetOfTax   6,587us-gaap_AccumulatedOtherComprehensiveIncomeLossCumulativeChangesInNetGainLossFromCashFlowHedgesEffectNetOfTax      
Unrealized gain on investments     681us-gaap_AccumulatedOtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax      
Total $ (66,518)us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax $ (44,961)us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax $ (50,058)us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax $ (24,825)us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax $ (33,129)us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax $ (41,450)us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax