Regulatory Capital - Bank's actual and required capital amounts and ratios (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Regulatory Capital [Abstract]
Total risk-based capital (to risk-weighted assets), actual, amount	$ 50,489us-gaap_Capital	$ 45,925us-gaap_Capital
Total risk-based capital (to risk-weighted assets), actual, ratio	14.46%us-gaap_CapitalToRiskWeightedAssets	14.04%us-gaap_CapitalToRiskWeightedAssets
Total risk-based capital (to risk-weighted assets), required for adequate capital, amount	27,926	26,164
Total risk-based capital (to risk-weighted assets), required for adequate capital, ratio	8.00%	8.00%
Total risk-based capital (to risk-weighted assets), to be well capitalized, amount	34,907	32,704
Total risk-based capital (to risk-weighted assets), to be well capitalized, ratio	10.00%	10.00%
Tier I capital (to risk-weighted assets), actual, amount	46,452us-gaap_TierOneRiskBasedCapital	41,831us-gaap_TierOneRiskBasedCapital
Tier I capital (to risk-weighted assets), actual, ratio	13.31%	12.79%
Tier I capital (to risk-weighted assets), required for adequate capital, amount	13,963	13,082
Tier I capital (to risk-weighted assets), required for adequate capital, ratio	4.00%	4.00%
Tier I capital (to risk-weighted assets), to be well capitalized, amount	20,944	19,623
Tier I capital (to risk-weighted assets), to be well capitalized, ratio	6.00%	6.00%
Tier I capital (to average assets), actual amount	46,452us-gaap_TierOneLeverageCapital	41,831us-gaap_TierOneLeverageCapital
Tier I capital (to average assets), actual, ratio	9.10%	8.69%
Tier I capital (to average assets), required for adequate capital, amount	20,421	19,265
Tier I capital (to average assets), required for adequate capital, ratio	4.00%	4.00%
Tier I capital (to average assets), to be well capitalized, amount	$ 25,526	$ 24,082
Tier I capital (to average assets), to be well capitalized, ratio	5.00%	5.00%

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The amount of total capital as defined in the regulations.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 948

-SubTopic 10

-Section 50

-Paragraph 5

-URI http://asc.fasb.org/extlink&oid=6490092&loc=d3e47304-110998

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

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-Paragraph 1H

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-Publisher FASB

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The minimum amount of Total Capital required for capital adequacy purposes under the regulatory framework for prompt corrective action.

+ References

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The minimum Total risk based capital ratio (total capital divided by risk weighted assets) required for capital adequacy purposes under the regulatory framework for prompt corrective action.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 505

-Section 50

-Paragraph 1H

-Subparagraph (c)(2)

-URI http://asc.fasb.org/extlink&oid=35709795&loc=d3e65071-112826

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The amount of Total Capital required to be categorized as well as capitalized under the regulatory framework for prompt corrective action.

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

-Publisher FASB

-Name Accounting Standards Codification

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The Total risk based capital ratio (total capital divided by risk weighted assets) required to be categorized as "well capitalized", in the regulatory framework for prompt corrective action.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 505

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-Subparagraph (c)(1)

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Total Capital divided by risk weighted assets as defined in the regulations.

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Tier 1 Leverage Capital as defined in the regulations. Also called Core Capital.

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The minimum amount of Tier 1 Leverage Capital required for capital adequacy purposes under the regulatory framework for prompt corrective action.

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The minimum amount of Tier 1 Leverage Capital for capital adequacy purposes divided by average assets as defined in the regulations.

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The amount of Tier 1 Leverage Capital required to be categorized as well capitalized under the regulatory framework for prompt corrective action.

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The amount of Tier 1 Leverage Capital required to be categorized as well capitalized divided by average assets as defined in the regulatory framework for prompt corrective action.

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Tier 1 Leverage Capital divided by average assets as defined in the regulations.

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Tier 1 Risk Based Capital as defined in the regulations.

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The minimum amount of Tier 1 Risk Based Capital required for capital adequacy purposes under the regulatory framework for prompt corrective action.

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The minimum Tier One Capital Ratio (Tier one capital divided by risk-weighted assets) required for capital adequacy purposes under the regulatory framework for prompt corrective action.

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The amount of Tier 1 Risk Based Capital required to be categorized as well capitalized under the regulatory framework for prompt corrective action.

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The Tier 1 capital ratio (Tier 1 capital divided by risk weighted assets) required to be categorized as "well capitalized" under the regulatory framework for prompt corrective action.

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Tier 1 capital divided by risk weighted assets as defined by regulations.

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