Regulatory Matters (Regulatory capital amounts and ratios) (Details) (USD $)	Mar. 31, 2015	Dec. 31, 2014
Tier 1 Risk-Based Core Capital (To Risk Weighted Assets)
Actual, Amount	$ 86,920	$ 77,746
Actual, Ratio	23.00%	20.60%
For Capital Adequacy, Amount	22,700	15,073
For Capital Adequacy, Ratio	6.00%	4.00%
Total Risk-Based Capital (To Risk Weighted Assets)
Actual, Amount	91,688	89,915
Actual, Ratio	24.20%	23.90%
For Capital Adequacy, Amount	30,267	30,147
For Capital Adequacy, Ratio	8.00%	8.00%
Tier 1 Leverage (Core) Capital (To Adjusted Tangible Assets)
Actual, Amount	86,920	77,746
Actual, Ratio	10.70%	9.50%
For Capital Adequacy, Amount	32,481	32,778
For Capital Adequacy, Ratio	4.00%	4.00%
Security Federal Bank [Member]
Tier 1 Risk-Based Core Capital (To Risk Weighted Assets)
Actual, Amount	87,322	87,222
Actual, Ratio	23.10%	23.20%
For Capital Adequacy, Amount	22,682	15,062
For Capital Adequacy, Ratio	6.00%	4.00%
To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount	30,243	22,593
To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio	8.00%	6.00%
Total Risk-Based Capital (To Risk Weighted Assets)
Actual, Amount	92,086	91,973
Actual, Ratio	24.40%	24.40%
For Capital Adequacy, Amount	30,243	30,123
For Capital Adequacy, Ratio	8.00%	8.00%
To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount	37,803	37,654
To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio	10.00%	10.00%
Tier 1 Leverage (Core) Capital (To Adjusted Tangible Assets)
Actual, Amount	87,322	87,222
Actual, Ratio	10.80%	10.60%
For Capital Adequacy, Amount	32,471	32,792
For Capital Adequacy, Ratio	4.00%	4.00%
To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount	$ 40,589	$ 40,991
To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio	5.00%	5.00%