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Comprehensive Loss (Details 1) (USD $)
In Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2011
Jun. 30, 2010
Jun. 30, 2011
Jun. 30, 2010
Available for sale securities        
Increase (decrease) in unrealized gain (loss) on available-for-sale securities $ 127 $ (701) $ 260 $ (185)
Reclassification adjustment for net gains on available-for-sale securities included in net income (loss) (5) 53 (1) 55
Change in unrealized gain (loss) on available-for-sale securities 122 (648) 259 (130)
Derivatives        
Increase in unrealized gain (loss) on derivatives designated as hedges (68)   (87)  
Realized loss reclassified from accumulated other comprehensive income to net loss 51   84  
Change in unrealized gain (loss) on derivatives designated as hedges $ (17)   $ (3)