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Accumulated Other Comprehensive Income (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 30, 2014
Sep. 30, 2013
Sep. 30, 2014
Sep. 30, 2013
Accumulated other comprehensive income        
Balance as of January 1, 2014     $ (199)  
Other comprehensive (loss) income, net of tax (1,172) 782 (469) (253)
Balance as of September 30, 2014 (668)   (668)  
Unrealized gains (losses) on available for sale securities
       
Accumulated other comprehensive income        
Balance as of January 1, 2014     (72)  
Other comprehensive (loss) income, net of tax     (82)  
Balance as of September 30, 2014 (154)   (154)  
Foreign currency translation adjustments
       
Accumulated other comprehensive income        
Balance as of January 1, 2014     (127)  
Other comprehensive (loss) income, net of tax     (387)  
Balance as of September 30, 2014 $ (514)   $ (514)