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Regulatory Matters (Details) (USD $)
 0 Months Ended
Apr. 23, 2013
Director
Dec. 31, 2014
Dec. 31, 2013
Tangible [Abstract]      
Tangible Actual, Amount   $ 106,916us-gaap_TangibleCapital [1] $ 102,790us-gaap_TangibleCapital [1]
Tangible Actual, % (in hundredths)   13.80%us-gaap_TangibleCapitalToTangibleAssets [1] 12.90%us-gaap_TangibleCapitalToTangibleAssets [1]
Tangible For Capital Adequacy Purposes, Amount   11,590us-gaap_TangibleCapitalRequiredForCapitalAdequacy [1] 11,924us-gaap_TangibleCapitalRequiredForCapitalAdequacy [1]
Tangible For Capital Adequacy Purposes, % (in hundredths)   1.50%us-gaap_TangibleCapitalRequiredForCapitalAdequacyToTangibleAssets [1] 1.50%us-gaap_TangibleCapitalRequiredForCapitalAdequacyToTangibleAssets [1]
Tier I capital [Abstract]      
Tier I capital Actual, Amount   106,916us-gaap_TierOneRiskBasedCapital [2] 102,790us-gaap_TierOneRiskBasedCapital [2]
Tier I capital Actual, % (in hundredths) 10.00%us-gaap_TierOneRiskBasedCapitalToRiskWeightedAssets 19.40%us-gaap_TierOneRiskBasedCapitalToRiskWeightedAssets [2] 18.60%us-gaap_TierOneRiskBasedCapitalToRiskWeightedAssets [2]
Tier I capital To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount   33,081us-gaap_TierOneRiskBasedCapitalRequiredToBeWellCapitalized [2] 33,114us-gaap_TierOneRiskBasedCapitalRequiredToBeWellCapitalized [2]
Tier I Capital To Be Well Capitalized Under Prompt Corrective Provisions, % (in hundredths)   6.00%us-gaap_TierOneRiskBasedCapitalRequiredToBeWellCapitalizedToRiskWeightedAssets [2] 6.00%us-gaap_TierOneRiskBasedCapitalRequiredToBeWellCapitalizedToRiskWeightedAssets [2]
Core [Abstract]      
Core Actual, Amount   106,916us-gaap_TierOneLeverageCapital [1] 102,790us-gaap_TierOneLeverageCapital [1]
Core Actual, % (in hundredths)   13.80%us-gaap_TierOneLeverageCapitalToAverageAssets [1] 12.90%us-gaap_TierOneLeverageCapitalToAverageAssets [1]
Core For Capital Adequacy Purposes, Amount   30,906us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacy [1] 31,797us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacy [1]
Core For Capital Adequacy Purposes, % (in hundredths)   4.00%us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacyToAverageAssets [1] 4.00%us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacyToAverageAssets [1]
Core To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount   38,633us-gaap_TierOneLeverageCapitalRequiredToBeWellCapitalized [1] 39,747us-gaap_TierOneLeverageCapitalRequiredToBeWellCapitalized [1]
Core To Be Well Capitalized Under Prompt Corrective Action Provisions, % (in hundredths)   5.00%us-gaap_TierOneLeverageCapitalRequiredToBeWellCapitalizedToAverageAssets [1] 5.00%us-gaap_TierOneLeverageCapitalRequiredToBeWellCapitalizedToAverageAssets [1]
Total [Abstract]      
Total Actual, Amount   113,848us-gaap_Capital [2] 109,055us-gaap_Capital [2]
Total Actual, % (in hundredths) 15.00%us-gaap_CapitalToRiskWeightedAssets 20.60%us-gaap_CapitalToRiskWeightedAssets [2] 19.80%us-gaap_CapitalToRiskWeightedAssets [2]
Total For Capital Adequacy Purposes, Amount   44,108us-gaap_CapitalRequiredForCapitalAdequacy [2] 44,153us-gaap_CapitalRequiredForCapitalAdequacy [2]
Total For Capital Adequacy Purposes, % (in hundredths)   8.00%us-gaap_CapitalRequiredForCapitalAdequacyToRiskWeightedAssets [2] 8.00%us-gaap_CapitalRequiredForCapitalAdequacyToRiskWeightedAssets [2]
Total To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount   $ 55,135us-gaap_CapitalRequiredToBeWellCapitalized [2] $ 55,191us-gaap_CapitalRequiredToBeWellCapitalized [2]
Total To Be Well Capitalized Under Prompt Corrective Action Provisions, % (in hundredths)   10.00%us-gaap_CapitalRequiredToBeWellCapitalizedToRiskWeightedAssets [2] 10.00%us-gaap_CapitalRequiredToBeWellCapitalizedToRiskWeightedAssets [2]
Number of directors in compliance committee 3svbi_NumberOfDirectorsInComplianceCommittee    
Business plan term 3 years    
Capital plan period 3 years    
[1] To adjusted total assets.
[2] To risk-weighted assets.