Regulatory Matters (Regulatory capital amounts and ratios) (Details) (USD $)	Jun. 30, 2013	Dec. 31, 2012
Tier 1 Risk-Based Core Capital (To Risk Weighted Assets)
Actual, Amount	$ 67,683	$ 68,639
Actual, Ratio	16.70%	16.50%
For Capital Adequacy, Amount	16,261	16,619
For Capital Adequacy, Ratio	4.00%	4.00%
Total Risk-Based Capital (To Risk Weighted Assets)
Actual, Amount	72,838	84,148
Actual, Ratio	17.90%	20.30%
For Capital Adequacy, Amount	32,522	33,237
For Capital Adequacy, Ratio	8.00%	8.00%
Tier 1 Leverage (Core) Capital (To Adjusted Tangible Assets)
Actual, Amount	67,683	68,639
Actual, Ratio	7.80%	7.70%
For Capital Adequacy, Amount	34,680	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	80,048	80,822
Actual, Ratio	19.70%	19.50%
For Capital Adequacy, Amount	16,250	16,606
For Capital Adequacy, Ratio	4.00%	4.00%
To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount	24,376	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	85,185	86,012
Actual, Ratio	21.00%	20.70%
For Capital Adequacy, Amount	32,501	33,212
For Capital Adequacy, Ratio	8.00%	8.00%
To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount	40,626	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	80,048	80,822
Actual, Ratio	9.20%	9.10%
For Capital Adequacy, Amount	34,670	35,541
For Capital Adequacy, Ratio	4.00%	4.00%
To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount	$ 43,337	$ 44,426
To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio	5.00%	5.00%