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Sales (Sales to Single Customers Exceeding 10% of Sales) (Details) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Revenue, Major Customer [Line Items]      
Sales $ 75,622us-gaap_SalesRevenueNet [1] $ 73,298us-gaap_SalesRevenueNet [1] $ 48,729us-gaap_SalesRevenueNet [1]
Customer "A" [Member]      
Revenue, Major Customer [Line Items]      
Sales 18,083us-gaap_SalesRevenueNet
/ us-gaap_MajorCustomersAxis
= silc_Customer1Member		 24,512us-gaap_SalesRevenueNet
/ us-gaap_MajorCustomersAxis
= silc_Customer1Member		 10,809us-gaap_SalesRevenueNet
/ us-gaap_MajorCustomersAxis
= silc_Customer1Member
Customer "B" [Member]      
Revenue, Major Customer [Line Items]      
Sales    [2]    [2] $ 8,714us-gaap_SalesRevenueNet
/ us-gaap_MajorCustomersAxis
= silc_Customer2Member
[1] Including sales to related parties in the amount of US$ 558 thousand, US$ 851 thousand and US$ 1,041 thousand in 2012, 2013 and 2014, respectively.
[2] Less than 10% of sales.