Derivatives and Hedging Activities (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Derivatives designated as cash flow hedging instruments [Member]
Summary of Company's outstanding derivatives
Derivative assets	$ 26
Derivative liabilities	34	225
Foreign Exchange Option Contracts [Member] | Derivatives designated as cash flow hedging instruments [Member]
Summary of Company's outstanding derivatives
Derivative liabilities	25	143
Foreign Exchange Forward Contracts [Member] | Derivatives designated as cash flow hedging instruments [Member]
Summary of Company's outstanding derivatives
Derivative assets	9
Derivative liabilities	9	82
Foreign Exchange Forward Contracts [Member] | Derivatives not qualified as hedging instruments [Member]
Summary of Company's outstanding derivatives
Derivative assets	$ 17