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Equity (Details 5) (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2013
Dec. 31, 2012
Accumulated other comprehensive income (loss) reflected in the Company's shareholders' equity    
Unrealized gains on available-for-sale securities $ (275) $ 867
Unrealized gains on cash flow hedges 615 607
Unrealized losses on cumulative translation adjustment (4,485) (2,659)
Accumulated other comprehensive income (loss) $ (4,145) $ (1,185)