Derivatives (Details 1) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended		3 Months Ended		6 Months Ended		3 Months Ended		6 Months Ended		3 Months Ended		6 Months Ended		3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012 Designated as Hedging Instrument [Member] Cash Flow Hedging [Member]	Jun. 30, 2011 Designated as Hedging Instrument [Member] Cash Flow Hedging [Member]	Jun. 30, 2012 Designated as Hedging Instrument [Member] Cash Flow Hedging [Member]	Jun. 30, 2011 Designated as Hedging Instrument [Member] Cash Flow Hedging [Member]	Jun. 30, 2012 Designated as Hedging Instrument [Member] Cash Flow Hedging [Member] Interest Rate Contracts [Member]	Jun. 30, 2011 Designated as Hedging Instrument [Member] Cash Flow Hedging [Member] Interest Rate Contracts [Member]	Jun. 30, 2012 Designated as Hedging Instrument [Member] Cash Flow Hedging [Member] Interest Rate Contracts [Member]	Jun. 30, 2011 Designated as Hedging Instrument [Member] Cash Flow Hedging [Member] Interest Rate Contracts [Member]	Jun. 30, 2012 Designated as Hedging Instrument [Member] Cash Flow Hedging [Member] Foreign Exchange Contracts [Member]	Jun. 30, 2011 Designated as Hedging Instrument [Member] Cash Flow Hedging [Member] Foreign Exchange Contracts [Member]	Jun. 30, 2012 Designated as Hedging Instrument [Member] Cash Flow Hedging [Member] Foreign Exchange Contracts [Member]	Jun. 30, 2011 Designated as Hedging Instrument [Member] Cash Flow Hedging [Member] Foreign Exchange Contracts [Member]	Jun. 30, 2012 Not Designated as Hedging Instrument [Member] Foreign Exchange Contracts [Member]	Jun. 30, 2011 Not Designated as Hedging Instrument [Member] Foreign Exchange Contracts [Member]	Jun. 30, 2012 Not Designated as Hedging Instrument [Member] Foreign Exchange Contracts [Member]	Jun. 30, 2011 Not Designated as Hedging Instrument [Member] Foreign Exchange Contracts [Member]	Apr. 30, 2012 Interest Rate Swap [Member] Designated as Hedging Instrument [Member] Cash Flow Hedging [Member]	Mar. 31, 2011 Interest Rate Swap [Member] Designated as Hedging Instrument [Member] Cash Flow Hedging [Member]	Apr. 30, 2012 Interest Rate Swap [Member] Designated as Hedging Instrument [Member] Cash Flow Hedging [Member]	Mar. 31, 2011 Interest Rate Swap [Member] Designated as Hedging Instrument [Member] Cash Flow Hedging [Member]
Derivative [Line Items]
Number of Interest Rate Derivatives Held																								2
Derivative, Amount of Hedged Item																					$ 100,000	$ 100,000
Derivative, Fixed Interest Rate																							1.03%	2.947%
Maximum Remaining Maturity of Foreign Currency Derivatives	2 years		2 years
Derivative, Net Hedge Ineffectiveness Gain (Loss)	0	0	0	0
Derivative Instruments, Gain (Loss) Recognized in Other Comprehensive Income (Loss), Effective Portion, Net					(633)	(238)	(397)	50	(699)	0	(699)	422	66	(238)	302	(372)
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net																	$ (82)	$ 147	$ 975	$ (911)