Derivative Instruments and Hedging Activities (Narrative) (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended
Mar. 31, 2015
Ria Operations [Member] | Foreign Exchange Contracts [Member]  
Derivative Instruments and Hedging Activities Disclosures [Line Items]  
Derivative, Notional Amount 119.0
HiFX Operations [Member] | Foreign Exchange Contracts [Member]  
Derivative Instruments and Hedging Activities Disclosures [Line Items]  
Derivative, Notional Amount 802.0
Maximum [Member] | Ria Operations [Member]  
Derivative Instruments and Hedging Activities Disclosures [Line Items]  
Foreign currency forward contract term 14 days