Derivatives Balance Sheet Location (Details) (USD $)			3 Months Ended		6 Months Ended
	Jun. 30, 2012	Dec. 31, 2011	Jun. 30, 2012 Foreign Exchange Forward [Member]	Jun. 30, 2011 Foreign Exchange Forward [Member]	Jun. 30, 2012 Foreign Exchange Forward [Member]	Jun. 30, 2011 Foreign Exchange Forward [Member]	Jun. 30, 2012 Foreign Exchange Forward [Member] Designated as Hedging Instrument [Member]	Dec. 31, 2011 Foreign Exchange Forward [Member] Designated as Hedging Instrument [Member]	Jun. 30, 2012 Foreign Exchange Forward [Member] Not Designated as Hedging Instrument [Member]	Dec. 31, 2011 Foreign Exchange Forward [Member] Not Designated as Hedging Instrument [Member]	Jun. 30, 2012 Interest Rate Swap [Member] Designated as Hedging Instrument [Member]	Dec. 31, 2011 Interest Rate Swap [Member] Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Notional Amount of Derivatives, Matured During Period			$ 47,191,000	$ 49,223,000	$ 84,158,000	$ 88,605,000
Assets	3,732,000	1,703,000					3,610,000	1,621,000	122,000	64,000	0	18,000
Liabilities	$ 1,830,000	$ 893,000					$ 1,224,000	$ 377,000	$ 140,000	$ 128,000	$ 466,000	$ 388,000