Derivatives Gain (Loss) in Statement of Finacial Position (Details) (USD $)	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Cash Flow Hedging [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Recognized in OCI on Derivatives (Effective Portion)	$ 120,000	$ (1,378,000)
Amount of Gain (Loss) Reclassified from Accumulated OCI into Income (Effective Portion)	779,000	62,000
Amount of Gain (Loss) Recognized in Income on Derivatives (Ineffective Portion and Amount Excluded from Effectiveness Testing)	0	6,000
Amount of Gain (Loss) Recognized in Income on Derivatives	(822,000)	62,000
Sales [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments, Gain Recognized in Income	258,000	213,000
Cost of Sales [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments, Gain Recognized in Income		151,000
Derivative Instruments, Loss Recognized in Income	(564,000)
Foreign Exchange Forward [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Recognized in Income on Derivatives	83,000	817,000
Foreign Exchange Forward [Member] | Cash Flow Hedging [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Recognized in OCI on Derivatives (Effective Portion)	10,000	(1,249,000)
Amount of Gain (Loss) Reclassified from Accumulated OCI into Income (Effective Portion)	779,000	62,000
Amount of Gain (Loss) Recognized in Income on Derivatives (Ineffective Portion and Amount Excluded from Effectiveness Testing)	0	6,000
Foreign Exchange Forward [Member] | Selling General and Administrative Expense [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments, Gain Recognized in Income	83,000	817,000
Interest Rate Swap [Member] | Cash Flow Hedging [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Recognized in OCI on Derivatives (Effective Portion)	110,000	(129,000)
Amount of Gain (Loss) Reclassified from Accumulated OCI into Income (Effective Portion)	0	0
Amount of Gain (Loss) Recognized in Income on Derivatives (Ineffective Portion and Amount Excluded from Effectiveness Testing)	0	0
Interest Rate Swap [Member] | Interest Expense [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments, Loss Recognized in Income	$ (126,000)	$ (42,000)