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Derivative Instruments And Hedging Activities (Narrative) (Detail) (USD $)
9 Months Ended
Sep. 30, 2014
Sep. 30, 2013
Dec. 31, 2013
Derivative Instruments, Gain (Loss) [Line Items]      
Net cash outflow/inflow from settlement of derivative contracts $ 7,100,000 $ 4,900,000  
Derivatives Assets 2,985,000   2,787,000
Derivatives Liabilities 4,166,000   5,861,000
Foreign Exchange Contract [Member]
     
Derivative Instruments, Gain (Loss) [Line Items]      
Notional value of foreign exchange contracts $ 235,000,000   $ 300,000,000