CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $)	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Cash flows from operating activities:
Net income	$ 4,398,820us-gaap_NetIncomeLoss	$ 4,076,924us-gaap_NetIncomeLoss	$ 3,666,828us-gaap_NetIncomeLoss
Adjustments to reconcile net income to net cash provided (used) by operating activities:
Depreciation	200,178	192,844	206,603
Gain on sale of securities	(312,577)us-gaap_GainLossOnSaleOfSecuritiesNet
Gain on sale of other real estate	(2,382)
Provision for loan losses	82,500us-gaap_ProvisionForLoanAndLeaseLosses	207,500us-gaap_ProvisionForLoanAndLeaseLosses	350,000us-gaap_ProvisionForLoanAndLeaseLosses
Stock-based compensation expense	74,908us-gaap_ShareBasedCompensation	74,722us-gaap_ShareBasedCompensation	72,928us-gaap_ShareBasedCompensation
Deferred income taxes	134,478us-gaap_DeferredIncomeTaxExpenseBenefit	59,829us-gaap_DeferredIncomeTaxExpenseBenefit	(183,607)us-gaap_DeferredIncomeTaxExpenseBenefit
Net amortization of unearned discounts on investment securities	303,036	516,746	390,543
Origination of mortgage loans held for sale	(71,767,800)us-gaap_ProceedsFromLoanOriginations1	(81,762,793)us-gaap_ProceedsFromLoanOriginations1	(108,699,648)us-gaap_ProceedsFromLoanOriginations1
Proceeds from sale of mortgage loans held for sale	69,182,061	95,503,328	97,798,357
(Increase) decrease in accrued interest receivable and other assets	(274,201)	(36,138)	502,361
Increase (decrease) in accrued interest payable and other liabilities	153,882	(74,111)	(12,081)
Net cash provided (used) by operating activities	2,172,903	18,758,851	(5,907,716)
Cash flows from investing activities:
Proceeds from calls and maturities of investment securities available for sale	1,920,000	2,325,000	3,745,000
Proceeds from sale of available for sale securities	37,159,363
Proceeds from sale of other real estate	37,855
Purchase of investment securities available for sale	(57,959,964)	(40,950,656)	(2,801,741)
Net increase in loans	(16,394,833)	(1,539,747)	(3,443,553)
Loss on disposal of fixed assets			1,628
Purchase of premises, equipment and leasehold improvements, net	(97,740)	(160,913)	(83,058)
Net cash used by investing activities	(35,335,319)	(40,326,316)	(2,581,724)
Cash flows from financing activities:
Net increase (decrease) in deposit accounts	17,176,372us-gaap_IncreaseDecreaseInDeposits	14,168,812us-gaap_IncreaseDecreaseInDeposits	(10,053,672)us-gaap_IncreaseDecreaseInDeposits
Net increase in short term borrowings	6,980,681us-gaap_ProceedsFromShortTermDebt
Dividends paid	(2,765,735)us-gaap_PaymentsOfOrdinaryDividends	(1,647,576)us-gaap_PaymentsOfOrdinaryDividends	(2,489,610)us-gaap_PaymentsOfOrdinaryDividends
Stock options exercised	26,050	128,477	11,094
Net cash provided (used) by financing activities	21,417,368	12,649,713	(12,532,188)
Net decrease in cash and cash equivalents	(11,745,048)	(8,917,752)	(21,021,628)
Cash and cash equivalents at beginning of year	22,124,096	31,041,848	52,063,476
Cash and cash equivalents at end of year	10,379,048	22,124,096	31,041,848
Cash paid during the year for:
Interest	429,758us-gaap_InterestPaid	410,598us-gaap_InterestPaid	534,773us-gaap_InterestPaid
Income taxes	1,819,000us-gaap_IncomeTaxesPaid	1,892,000us-gaap_IncomeTaxesPaid	1,717,751us-gaap_IncomeTaxesPaid
Supplemental disclosure for non-cash investing and financing activity:
Change in unrealized gain (loss) on securities available for sale, net of income taxes	287,122	(1,244,191)	186,390
Change in dividends payable	$ 325bksc_ChangeInDividendsPayable	$ 579,655bksc_ChangeInDividendsPayable	$ (488,944)bksc_ChangeInDividendsPayable

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The cash outflow associated with the acquisition of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale; includes cash outflows to pay for construction of self-constructed assets.

+ References

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- Definition

Cash inflow associated with loan origination (the process when securing a mortgage for a piece of real property) or lease origination.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 12

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3179-108585

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- Definition

The cash inflow associated with maturities (principal being due), prepayments and calls (requests of early payments) on securities not classified as either held-to-maturity securities or trading securities which are classified as available-for-sale securities.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Investing Activities

-URI http://asc.fasb.org/extlink&oid=6516133

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 320

-SubTopic 10

-Section 45

-Paragraph 11

-URI http://asc.fasb.org/extlink&oid=6871852&loc=d3e26853-111562

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 12

-Subparagraph (a),(b)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3179-108585

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- Definition

The cash inflow associated with the sale of debt and equity securities classified as available-for-sale securities.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Investing Activities

-URI http://asc.fasb.org/extlink&oid=6516133

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 320

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-Topic 230

-SubTopic 10

-Section 45

-Paragraph 12

-Subparagraph (a),(b)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3179-108585

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- Definition

The cash inflow from sales of loans that are secured with real estate mortgages and are held with the intention to resell in the near future.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 21

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3461-108585

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 25

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3536-108585

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- Definition

The cash inflow from proceeds From Sales of Wholly Owned Real Estate and Real Estate Acquired in Settlement of Loans.

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- Definition

The cash inflow from a borrowing having initial term of repayment within one year or the normal operating cycle, if longer.

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- Definition

The cash inflow associated with the amount received from holders exercising their stock options. This item inherently excludes any excess tax benefit, which the entity may have realized and reported separately.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Financing Activities

-URI http://asc.fasb.org/extlink&oid=6513228

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (j)

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

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-Topic 230

-SubTopic 10

-Section 45

-Paragraph 14

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3255-108585

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- Definition

Amount of expense related to estimated loss from loan and lease transactions.

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- Definition

The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method.

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