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Income Taxes (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 6 Months Ended
Jun. 30, 2014
Jun. 30, 2013
Jun. 30, 2014
Jun. 30, 2013
Provision for income taxes        
State $ 227 $ 162 $ 261 $ 325
Foreign 681 592 1,202 1,417
Income tax provision $ 908 $ 754 $ 1,463 $ 1,742