Financial Instruments and Risk Management Financial Instruments and Risk Management (Gross Notional Amount of Outstanding Derivatives) (Details) (Foreign Exchange Forward [Member], USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Currency forward contracts	$ 99,000	$ 70,000
Not Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Currency forward contracts	$ 109,000	$ 121,934