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Financial Derivatives and Hedging Activities - Outstanding Derivatives Used to Hedge Foreign Exchange Risks (Detail) In Thousands, unless otherwise specified	Mar. 31, 2014 Cash Flow Hedges [Member] Designated as Hedging [Member] Euro / U.S. Dollar [Member] EUR (€)	Dec. 31, 2013 Cash Flow Hedges [Member] Designated as Hedging [Member] Euro / U.S. Dollar [Member] EUR (€)	Mar. 31, 2014 Cash Flow Hedges [Member] Designated as Hedging [Member] U.S. Dollar / Canadian Dollar [Member] USD ($)	Dec. 31, 2013 Cash Flow Hedges [Member] Designated as Hedging [Member] U.S. Dollar / Canadian Dollar [Member] USD ($)	Mar. 31, 2014 Cash Flow Hedges [Member] Designated as Hedging [Member] Euro / Philippine Peso [Member] EUR (€)	Dec. 31, 2013 Cash Flow Hedges [Member] Designated as Hedging [Member] Euro / Philippine Peso [Member] EUR (€)	Mar. 31, 2014 Cash Flow Hedges [Member] Designated as Hedging [Member] British Pound / Philippine Peso [Member] GBP (£)	Dec. 31, 2013 Cash Flow Hedges [Member] Designated as Hedging [Member] British Pound / Philippine Peso [Member] GBP (£)	Mar. 31, 2014 Cash Flow Hedges [Member] Designated as Hedging [Member] Euro / British Pound [Member] EUR (€)	Dec. 31, 2013 Cash Flow Hedges [Member] Designated as Hedging [Member] Euro / British Pound [Member] EUR (€)	Mar. 31, 2014 Foreign Currency Hedges [Member] Not Designated as Hedging [Member] Euro / U.S. Dollar [Member] EUR (€)	Dec. 31, 2013 Foreign Currency Hedges [Member] Not Designated as Hedging [Member] Euro / U.S. Dollar [Member] EUR (€)	Mar. 31, 2014 Foreign Currency Hedges [Member] Not Designated as Hedging [Member] Euro / British Pound [Member] EUR (€)	Dec. 31, 2013 Foreign Currency Hedges [Member] Not Designated as Hedging [Member] Euro / British Pound [Member] EUR (€)	Mar. 31, 2014 Foreign Currency Hedges [Member] Not Designated as Hedging [Member] Euro / British Pound [Member] EUR (€)	Dec. 31, 2013 Foreign Currency Hedges [Member] Not Designated as Hedging [Member] Euro / British Pound [Member] EUR (€)	Mar. 31, 2014 Foreign Currency Hedges [Member] Not Designated as Hedging [Member] Canadian Dollar / U.S Dollar [Member] CAD	Dec. 31, 2013 Foreign Currency Hedges [Member] Not Designated as Hedging [Member] Canadian Dollar / U.S Dollar [Member] CAD	Mar. 31, 2014 Foreign Currency Hedges [Member] Not Designated as Hedging [Member] U.S Dollar / Euro [Member] USD ($)	Dec. 31, 2013 Foreign Currency Hedges [Member] Not Designated as Hedging [Member] U.S Dollar / Euro [Member] USD ($)	Mar. 31, 2014 Foreign Currency Hedges [Member] Not Designated as Hedging [Member] U.S. Dollar / British Pound [Member] USD ($)	Dec. 31, 2013 Foreign Currency Hedges [Member] Not Designated as Hedging [Member] U.S. Dollar / British Pound [Member] USD ($)
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Sell (Buy) Notional	€ (27,976)	€ (27,105)	$ (11,628)	$ (13,077)	€ (448,711)		£ (4,399)		€ (59)		€ 8,000	€ 9,000	€ (9,000)	€ (8,000)	€ 5,000	€ 5,000	2,000	2,000	$ 2,000	$ 2,000	$ 7,000	$ 6,000