Consolidated Balance Sheets (Unaudited) (USD $)	Mar. 31, 2015	Dec. 31, 2014
ASSETS:
Cash And Cash Equivalents	$ 8,461,858	$ 10,192,702
Certificates Of Deposit With Other Banks	2,095,000	2,095,000
Investment And Mortgage-Backed Securities:
Available For Sale: (Amortized Cost Of $432,951,620 And $430,241,854 At March 31, 2014 And December 31, 2013, Respectively)	434,502,629us-gaap_AvailableForSaleSecurities	429,700,540us-gaap_AvailableForSaleSecurities
Total Investments And Mortgage-Backed Securities	434,503,000us-gaap_Investments
Loans Receivable, Net:
Held For Sale	1,878,844	1,864,999
Held For Investment: (Net Of Allowance Of $9,845,755 and $10,241,970 At March 31, 2014 And December 31, 2013, Respectively)	330,179,583us-gaap_LoansAndLeasesReceivableOther	338,009,496us-gaap_LoansAndLeasesReceivableOther
Total Loans Receivable, Net	332,058,427us-gaap_LoansReceivableNet	339,874,495us-gaap_LoansReceivableNet
Accrued Interest Receivable:
Loans	1,029,658us-gaap_InterestReceivable	971,569us-gaap_InterestReceivable
Mortgage-Backed Securities	675,945us-gaap_OtherReceivables	682,585us-gaap_OtherReceivables
Investment Securities	1,331,054	1,408,924
Total Accrued Interest Receivable	3,036,657	3,063,078
Premises And Equipment, Net	18,608,102us-gaap_PropertyPlantAndEquipmentNet	18,233,226us-gaap_PropertyPlantAndEquipmentNet
Federal Home Loan Bank (FHLB) Stock, At Cost	2,196,100us-gaap_FederalHomeLoanBankStock	3,144,600us-gaap_FederalHomeLoanBankStock
Repossessed Assets Acquired In Settlement Of Loans	6,486,850	3,229,710
Bank Owned Life Insurance	11,237,044us-gaap_BankOwnedLifeInsurance	11,150,045us-gaap_BankOwnedLifeInsurance
Goodwill	1,199,754us-gaap_Goodwill	1,199,754us-gaap_Goodwill
Other Assets	3,250,342us-gaap_OtherAssets	3,480,676us-gaap_OtherAssets
Total Assets	823,132,763us-gaap_Assets	825,363,826us-gaap_Assets
Liabilities:
Deposit Accounts	672,441,557us-gaap_Deposits	660,115,164us-gaap_Deposits
Advances From FHLB	34,200,000	52,900,000
Other Borrowings	10,340,157us-gaap_OtherBorrowings	8,523,348us-gaap_OtherBorrowings
Junior Subordinated Debentures	5,155,000us-gaap_JuniorSubordinatedNotes	5,155,000us-gaap_JuniorSubordinatedNotes
Advance Payments By Borrowers For Taxes And Insurance	414,167	266,352
Senior Convertible Debentures	6,084,000us-gaap_SeniorNotes	6,084,000us-gaap_SeniorNotes
Other Liabilities	5,621,054us-gaap_OtherLiabilities	4,884,577us-gaap_OtherLiabilities
Total Liabilities	734,255,935us-gaap_Liabilities	737,928,441us-gaap_Liabilities
Shareholders' Equity:
Serial Preferred Stock, $.01 Par Value; Authorized 200,000 Shares; Issued And Outstanding, 22,000 Shares At March 31, 2014 And December 31, 2013, Respectively	22,000,000us-gaap_PreferredStockValueOutstanding	22,000,000us-gaap_PreferredStockValueOutstanding
Common Stock, $.01 Par Value; Authorized 5,000,000 Shares; Issued 3,144,934 Shares At March 31, 2014 And At December 31, 2013, Respectively	31,464us-gaap_CommonStockValueOutstanding	31,449us-gaap_CommonStockValueOutstanding
Additional Paid-In Capital	12,019,325us-gaap_AdditionalPaidInCapital	11,990,813us-gaap_AdditionalPaidInCapital
Treasury Stock, At Cost (200,933 Shares At March 31, 2014 And December 31, 2013, Respectively)	(4,330,712)us-gaap_TreasuryStockValue	(4,330,712)us-gaap_TreasuryStockValue
Nonvested Restricted Stock	(25,358)sfdl_NonvestedRestrictedStock	0sfdl_NonvestedRestrictedStock
Accumulated Other Comprehensive Income	5,755,660	5,476,375
Retained Earnings	53,426,449	52,267,460
Total Shareholders' Equity	88,876,828us-gaap_StockholdersEquity	87,435,385us-gaap_StockholdersEquity
Total Liabilities And Shareholders' Equity	$ 823,132,763	$ 825,363,826

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Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 360

-SubTopic 10

-Section 50

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-Subparagraph a

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-Name Regulation S-X (SX)

-Number 210

-Section 03

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- Definition

The cumulative amount of the reporting entity's undistributed earnings or deficit.

+ References

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

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-Subparagraph (SX 210.5-02.31(a)(3))

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Including the current and noncurrent portions, carrying value as of the balance sheet date of Notes with the highest claim on the assets of the issuer in case of bankruptcy or liquidation (with maturities initially due after one year or beyond the operating cycle if longer). Senior note holders are paid off in full before any payments are made to junior note holders.

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Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which are attributable to the parent. The amount of the economic entity's stockholders' equity attributable to the parent excludes the amount of stockholders' equity which is allocable to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest). This excludes temporary equity and is sometimes called permanent equity.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SAB TOPIC 4.E)

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-Name Staff Accounting Bulletin (SAB)

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-Name Accounting Standards Codification

-Topic 210

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-Subparagraph (SX 210.5-02.29-31)

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- Definition

The amount allocated to treasury stock. Treasury stock is common and preferred shares of an entity that were issued, repurchased by the entity, and are held in its treasury.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 505

-SubTopic 30

-Section 50

-Paragraph 4

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