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Shareholders' Equity (Stock Option Summary) (Details) (USD $)
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Options outstanding, number of options 192,130us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber 272,750us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber 413,087us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber 257,425us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber
Options exercisable, number of options 78,130us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber      
$15.28 [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Exercise price US$ $ 15.28us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice
/ us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis
= silc_Allocation3Member
     
Options outstanding, number of options 192,130us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber
/ us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis
= silc_Allocation3Member
     
Options outstanding, weighted average remaining contractual life (in years) 5 years 8 months 12 days      
Options exercisable, number of options 78,130us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber
/ us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis
= silc_Allocation3Member
     
Options exercisable, weighted average remaining contractual life (in years) 5 years 8 months 12 days