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Derivatives And Hedging Activities (Narrative) (Details) - USD ($)
$ in Millions
3 Months Ended
Jun. 30, 2015
Mar. 31, 2015
Dec. 31, 2014
Jun. 30, 2014
Derivative [Line Items]        
Net unrealized gain on foreign currency derivatives designated as cash flow hedges $ 0.9      
Foreign Exchange Forward [Member]        
Derivative [Line Items]        
Notional amount of derivative contracts 75.3 $ 80.4   $ 42.8
Cash Flow Hedging [Member] | Interest Rate Swap [Member]        
Derivative [Line Items]        
Notional amount of derivative contracts $ 370.0   $ 74.0