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Taxes on Income (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Taxes on Income [Abstract]      
Domestic $ 19,442 $ 15,334 $ 18,350
Foreign 4,803 5,323 2,407
Income before taxes on income $ 24,245 $ 20,657 $ 20,757