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DISCLOSURES REGARDING FAIR VALUE OF FINANCIAL INSTRUMENTS (Details 2) (Nonrecurring Basis [Member])
12 Months Ended
Dec. 31, 2014
Impaired Loans [Member]
 
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]  
Valuation technique

Discounted Appraisals

Unobservable Input

Collateral Discounts

Description of general range of inputs

0 – 25%

Impaired Loans [Member] | Lower Range [Member]
 
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]  
Discount rate (in percent) 0.00%us-gaap_FairValueInputsDiscountRate
/ us-gaap_FairValueByMeasurementBasisAxis
= bksc_ImpairedLoansMember
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsNonrecurringMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
Impaired Loans [Member] | Upper Range [Member]
 
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]  
Discount rate (in percent) 25.00%us-gaap_FairValueInputsDiscountRate
/ us-gaap_FairValueByMeasurementBasisAxis
= bksc_ImpairedLoansMember
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsNonrecurringMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
Other real estate owned [Member]
 
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]  
Valuation technique

Appraisal Value/ Comparison Sales/Other Estimates

Unobservable Input

Appraisals and or Sales of Comparable Properties

Description of general range of inputs

Appraisals Discounted 10% to 20% for Sales Commissions and Other Holding Costs

Other real estate owned [Member] | Lower Range [Member]
 
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]  
Discount rate (in percent) 10.00%us-gaap_FairValueInputsDiscountRate
/ us-gaap_FairValueByMeasurementBasisAxis
= bksc_RepossessedAssetsMember
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsNonrecurringMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
Other real estate owned [Member] | Upper Range [Member]
 
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]  
Discount rate (in percent) 20.00%us-gaap_FairValueInputsDiscountRate
/ us-gaap_FairValueByMeasurementBasisAxis
= bksc_RepossessedAssetsMember
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsNonrecurringMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember