Derivatives Gain (Loss) in Statement of Finacial Position (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended		3 Months Ended	9 Months Ended			12 Months Ended	3 Months Ended		9 Months Ended
	Sep. 30, 2014 Cash Flow Hedging [Member]	Sep. 30, 2013 Cash Flow Hedging [Member]	Sep. 30, 2014 Cash Flow Hedging [Member]	Sep. 30, 2013 Cash Flow Hedging [Member]	Sep. 30, 2014 Foreign currency forward contracts Cash Flow Hedging [Member]	Sep. 30, 2013 Foreign currency forward contracts Cash Flow Hedging [Member]	Sep. 30, 2014 Foreign currency forward contracts Cash Flow Hedging [Member]	Sep. 30, 2013 Foreign currency forward contracts Cash Flow Hedging [Member]	Sep. 30, 2013 Interest rate swaps Cash Flow Hedging [Member]	Sep. 30, 2014 Interest rate swaps Cash Flow Hedging [Member]	Sep. 30, 2013 Interest rate swaps Cash Flow Hedging [Member]	Sep. 30, 2014 Not Designated as Hedging Instrument [Member]	Dec. 31, 2013 Not Designated as Hedging Instrument [Member]	Sep. 30, 2014 Not Designated as Hedging Instrument [Member] Foreign currency forward contracts	Sep. 30, 2013 Not Designated as Hedging Instrument [Member] Foreign currency forward contracts	Sep. 30, 2014 Not Designated as Hedging Instrument [Member] Foreign currency forward contracts	Sep. 30, 2013 Not Designated as Hedging Instrument [Member] Foreign currency forward contracts
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Recognized in OCI on Derivatives (Effective Portion)		$ (197)	$ 127	$ 650	$ 451	$ 48	$ 127	$ 495	$ (245)	$ 0	$ 155
Amount of Gain (Loss) Reclassified from Accumulated OCI into Income (Effective Portion)		(78)	(477)	(72)	(11)	(65)	(465)	67	(13)	(12)	(139)
Amount of Gain (Loss) Recognized in Income on Derivatives (Ineffective Portion and Amount Excluded from Effectiveness Testing)		2	(22)	37	0	2	(22)	37	0	0	0
Amount of Gain (Loss) Recognized in Income on Derivatives	$ (53)	$ (74)	$ (585)	$ 43								$ (2,384)	$ 370	$ (2,240)	$ 361	$ (2,384)	$ 617