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Derivative Instruments And Hedging Activities (Narrative) (Detail) (USD $)	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013
Derivative Instruments And Hedging Activities [Line Items]
Notional value of foreign exchange contracts	$ 306,000,000		$ 300,000,000
Net cash outflow/inflow from settlement of derivative contracts	2,700,000	7,700,000
Derivatives Assets	3,433,000		2,787,000
Derivatives Liabilities	$ 5,234,000		$ 5,861,000

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Fair values as of the balance sheet date of all assets resulting from contracts that meet the criteria of being accounted for as derivative instruments, net of the effects of master netting arrangements.

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Fair values as of the balance sheet date of all liabilities resulting from contracts that meet the criteria of being accounted for as derivative instruments, net of the effects of master netting arrangements.

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Aggregate notional amount of foreign currency exchange rate derivatives. Notional amount refers to the number of currency units specified in the foreign currency derivative contract.

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