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Shareholders' Equity (Stock Options Granted in 2010) (Narrative) (Details) (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended			1 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 21, 2010
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Exercise price of options			$ 15.28us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice
Expense related to grant	$ 1,266us-gaap_AllocatedShareBasedCompensationExpense	$ 668us-gaap_AllocatedShareBasedCompensationExpense	$ 544us-gaap_AllocatedShareBasedCompensationExpense
$18.82 [Member] | Share Option Plan (2004) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options granted				137,500us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod / us-gaap_PlanNameAxis = silc_ShareOptionPlan2004Member / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = silc_Allocation2Member
Exercise price of options				$ 18.82us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice / us-gaap_PlanNameAxis = silc_ShareOptionPlan2004Member / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = silc_Allocation2Member
Expiration date				Dec. 21, 2018
Closing price to determine expiration date				$ 9.41silc_ConditionForExpiration / us-gaap_PlanNameAxis = silc_ShareOptionPlan2004Member / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = silc_Allocation2Member
Percentage of options that vest and become exercisable on the second anniversary of the grant date				50.00%silc_PercentageOfOptionsThatVestAndBecomeExercisableOnSecondAnniversaryOfGrantDate / us-gaap_PlanNameAxis = silc_ShareOptionPlan2004Member / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = silc_Allocation2Member
Percentage of options that vest and become exercisable on the third anniversary of the grant date				50.00%silc_PercentageOfOptionsThatVestAndBecomeExercisableOnThirdAnniversaryOfGrantDate / us-gaap_PlanNameAxis = silc_ShareOptionPlan2004Member / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = silc_Allocation2Member
Expense related to grant

X

- Definition

Condition for Expiration

+ References

No definition available.

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- Definition

Percentage of options that vest and become exercisable on the second anniversary of the grant date

+ References

No definition available.

+ Details

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- Definition

Percentage of options that vest and become exercisable on the third anniversary of the grant date

+ References

No definition available.

+ Details

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- Definition

Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 1

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SAB TOPIC 14.F)

-URI http://asc.fasb.org/extlink&oid=27013229&loc=d3e301413-122809



Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (h)(1)(i)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901



Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Staff Accounting Bulletin (SAB)

-Number Topic 14

-Section F

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- Definition

Date the equity-based award expires, in CCYY-MM-DD format.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (a)(2)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

Net number of share options (or share units) granted during the period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(1)(iv)(1)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options.

+ References

No definition available.

+ Details

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