v2.3.0.11
Derivative Instruments and Hedging Activities (Details) (USD $)
3 Months Ended 6 Months Ended
Jun. 30, 2011
Jun. 30, 2010
Jun. 30, 2011
Jun. 30, 2010
Dec. 31, 2010
Derivative Instruments and Hedging Activities          
Notional amount of foreign exchange forward contracts $ 63,000,000   $ 63,000,000   $ 91,000,000
Notional amount of foreign exchange forward contracts on a net basis 17,000,000   17,000,000   51,000,000
Fair value derivative liabilities 0   0   0
Fair value derivative assets 0   0   0
Fair value gain (loss) on foreign currency forward contracts $ 0 $ 0 $ 0 $ 0