Regulatory Capital (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Bank's capital ratios
Tangible capital to tangible assets, Amount		$ 29,319
Tangible capital to tangible assets, Ratio		10.75%
Tangible capital required for capital adequacy to tangible assets, Amount		4,090
Tangible capital required for capital adequacy to tangible assets, Ratio		1.50%
Total capital to risk weighted assets, Amount	32,247	31,073
Total capital to risk weighted assets, Ratio	15.45%	16.48%
Capital required for capital adequacy to risk weighted assets, Amount	16,693	15,081
Capital required for capital adequacy to risk weighted assets, Ratio	8.00%	8.00%
Capital required to be well capitalized to risk weighted assets, Amount	20,866	18,852
Capital required to be well capitalized to risk weighted assets, Ratio	10.00%	10.00%
Tier1 risk based capital to risk weighted assets, Amount	29,957	29,319
Tier 1 risk based capital to risk weighted assets, Ratio	14.36%	15.55%
Tier 1 risk based capital required for capital adequacy to risk weighted assets, Amount	8,346	7,541
Tier1 risk based capital required for capital adequacy to risk weighted assets, Ratio	4.00%	4.00%
Tier 1 risk based capital required to be well capitalized to risk weighted assets, Amount	12,520	11,311
Tier 1 risk based capital required to be well capitalized to risk weighted assets, Ratio	6.00%	6.00%
Tier 1 leverage capital to assets, Amount	29,957	29,319
Tier 1 leverage capital to assets, Ratio	10.12%	10.75%
Tier 1 leverage capital required for capital adequacy to assets, Amount	11,843	10,905
Tier 1 leverage capital required for capital adequacy to assets, Ratio	4.00%	4.00%
Tier 1 leverage capital required to be well capitalized to assets, Amount	$ 14,804	$ 13,632
Tier 1 leverage capital required to be well capitalized to assets, Ratio	5.00%	5.00%