3. Foreign Exchange Forward Contracts (Details) (USD $) In Millions, unless otherwise specified	9 Months Ended
	Sep. 30, 2014
Derivatives, Fair Value [Line Items]
Unrealized gain or loss on contracts maturing in October through December 2014 to sell foreign currency	$ 0.3
Unrealized gain or loss on contracts maturing in October through December 2014 to purchase foreign currency	0.3
Forward foreign exchange contract to sell foreign currency [Member]
Derivatives, Fair Value [Line Items]
Notional value	89.4
Forward foreign exchange contract to purchase foreign currency [Member]
Derivatives, Fair Value [Line Items]
Notional value	$ 345.0