Regulatory Matters (Regulatory capital amounts and ratios) (Details) (USD $)	Sep. 30, 2013	Dec. 31, 2012
Tier 1 Risk-Based Core Capital (To Risk Weighted Assets)
Actual, Amount	$ 69,223	$ 68,639
Actual, Ratio	17.40%	16.50%
For Capital Adequacy, Amount	15,956	16,619
For Capital Adequacy, Ratio	4.00%	4.00%
Total Risk-Based Capital (To Risk Weighted Assets)
Actual, Amount	83,475	84,148
Actual, Ratio	20.90%	20.30%
For Capital Adequacy, Amount	31,913	33,237
For Capital Adequacy, Ratio	8.00%	8.00%
Tier 1 Leverage (Core) Capital (To Adjusted Tangible Assets)
Actual, Amount	69,223	68,639
Actual, Ratio	8.10%	7.70%
For Capital Adequacy, Amount	34,371	35,552
For Capital Adequacy, Ratio	4.00%	4.00%
Security Federal Bank [Member]
Tier 1 Risk-Based Core Capital (To Risk Weighted Assets)
Actual, Amount	80,916	80,822
Actual, Ratio	20.30%	19.50%
For Capital Adequacy, Amount	15,946	16,606
For Capital Adequacy, Ratio	4.00%	4.00%
To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount	23,919	24,909
To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio	6.00%	6.00%
Total Risk-Based Capital (To Risk Weighted Assets)
Actual, Amount	85,969	86,012
Actual, Ratio	21.60%	20.70%
For Capital Adequacy, Amount	31,892	33,212
For Capital Adequacy, Ratio	8.00%	8.00%
To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount	39,865	41,515
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	80,916	80,822
Actual, Ratio	9.50%	9.10%
For Capital Adequacy, Amount	34,232	35,541
For Capital Adequacy, Ratio	4.00%	4.00%
To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount	$ 42,790	$ 44,426
To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio	5.00%	5.00%