Fair Value (Details 4) (USD $)	3 Months Ended	12 Months Ended
	Mar. 31, 2015	Dec. 31, 2014
Quantitative information about level 3 fair value measurements for financial instruments measured at fair value on a non-recurring basis
Foreclosed assets, Fair Value	1,716,000	696,000
Non-recurring basis | Level 3
Quantitative information about level 3 fair value measurements for financial instruments measured at fair value on a non-recurring basis
Impaired loans - held-for-investment, Fair Value	5,508,000	2,622,000
Foreclosed assets, Fair Value	1,267,000	31,000
Non-recurring basis | Level 3 | Foreclosed assets - land and construction
Quantitative information about level 3 fair value measurements for financial instruments measured at fair value on a non-recurring basis
Foreclosed assets, Fair Value		31,000
Non-recurring basis | Level 3 | Commercial
Quantitative information about level 3 fair value measurements for financial instruments measured at fair value on a non-recurring basis
Impaired loans - held-for-investment, Fair Value	461,000	859,000
Foreclosed assets, Fair Value	202,000
Non-recurring basis | Level 3 | Commercial | Market Approach
Quantitative information about level 3 fair value measurements for financial instruments measured at fair value on a non-recurring basis
Impaired loans - held-for-investment, Fair Value	461,000	859,000
Non-recurring basis | Level 3 | Commercial | Market Approach | Minimum
Quantitative information about level 3 fair value measurements for financial instruments measured at fair value on a non-recurring basis
Discount adjustment for differences between comparable sales (as a percent)	0.00%	0.00%
Non-recurring basis | Level 3 | Commercial | Market Approach | Maximum
Quantitative information about level 3 fair value measurements for financial instruments measured at fair value on a non-recurring basis
Discount adjustment for differences between comparable sales (as a percent)	3.00%	3.00%
Non-recurring basis | Level 3 | Commercial | Market Approach | Weighted average
Quantitative information about level 3 fair value measurements for financial instruments measured at fair value on a non-recurring basis
Discount adjustment for differences between comparable sales (as a percent)	3.00%	3.00%
Non-recurring basis | Level 3 | Commercial | Foreclosed assets - land and construction | Market Approach
Quantitative information about level 3 fair value measurements for financial instruments measured at fair value on a non-recurring basis
Impaired loans - held-for-investment, Fair Value	202,000	31,000
Non-recurring basis | Level 3 | Commercial | Foreclosed assets - land and construction | Market Approach | Maximum
Quantitative information about level 3 fair value measurements for financial instruments measured at fair value on a non-recurring basis
Discount adjustment for differences between comparable sales (as a percent)	1.00%	1.00%
Non-recurring basis | Level 3 | Real estate | Commercial and residential
Quantitative information about level 3 fair value measurements for financial instruments measured at fair value on a non-recurring basis
Impaired loans - held-for-investment, Fair Value	3,898,000	587,000
Foreclosed assets, Fair Value	1,065,000
Non-recurring basis | Level 3 | Real estate | Commercial and residential | Market Approach
Quantitative information about level 3 fair value measurements for financial instruments measured at fair value on a non-recurring basis
Impaired loans - held-for-investment, Fair Value	3,898,000	587,000
Non-recurring basis | Level 3 | Real estate | Commercial and residential | Market Approach | Minimum
Quantitative information about level 3 fair value measurements for financial instruments measured at fair value on a non-recurring basis
Discount adjustment for differences between comparable sales (as a percent)	0.00%	0.00%
Non-recurring basis | Level 3 | Real estate | Commercial and residential | Market Approach | Maximum
Quantitative information about level 3 fair value measurements for financial instruments measured at fair value on a non-recurring basis
Discount adjustment for differences between comparable sales (as a percent)	3.00%	3.00%
Non-recurring basis | Level 3 | Real estate | Commercial and residential | Market Approach | Weighted average
Quantitative information about level 3 fair value measurements for financial instruments measured at fair value on a non-recurring basis
Discount adjustment for differences between comparable sales (as a percent)	3.00%	3.00%
Non-recurring basis | Level 3 | Real estate | Land and construction
Quantitative information about level 3 fair value measurements for financial instruments measured at fair value on a non-recurring basis
Impaired loans - held-for-investment, Fair Value	1,149,000	1,176,000
Non-recurring basis | Level 3 | Real estate | Land and construction | Market Approach
Quantitative information about level 3 fair value measurements for financial instruments measured at fair value on a non-recurring basis
Impaired loans - held-for-investment, Fair Value	1,149,000	1,176,000
Non-recurring basis | Level 3 | Real estate | Land and construction | Market Approach | Minimum
Quantitative information about level 3 fair value measurements for financial instruments measured at fair value on a non-recurring basis
Discount adjustment for differences between comparable sales (as a percent)	1.00%	1.00%
Non-recurring basis | Level 3 | Real estate | Land and construction | Market Approach | Maximum
Quantitative information about level 3 fair value measurements for financial instruments measured at fair value on a non-recurring basis
Discount adjustment for differences between comparable sales (as a percent)	2.00%	2.00%
Non-recurring basis | Level 3 | Real estate | Land and construction | Market Approach | Weighted average
Quantitative information about level 3 fair value measurements for financial instruments measured at fair value on a non-recurring basis
Discount adjustment for differences between comparable sales (as a percent)	2.00%	2.00%
Non-recurring basis | Level 3 | Real estate | Foreclosed assets - commercial and residential | Market Approach
Quantitative information about level 3 fair value measurements for financial instruments measured at fair value on a non-recurring basis
Impaired loans - held-for-investment, Fair Value	1,065,000
Non-recurring basis | Level 3 | Real estate | Foreclosed assets - commercial and residential | Market Approach | Minimum
Quantitative information about level 3 fair value measurements for financial instruments measured at fair value on a non-recurring basis
Discount adjustment for differences between comparable sales (as a percent)	0.00%
Non-recurring basis | Level 3 | Real estate | Foreclosed assets - commercial and residential | Market Approach | Maximum
Quantitative information about level 3 fair value measurements for financial instruments measured at fair value on a non-recurring basis
Discount adjustment for differences between comparable sales (as a percent)	3.00%
Non-recurring basis | Level 3 | Real estate | Foreclosed assets - commercial and residential | Market Approach | Weighted average
Quantitative information about level 3 fair value measurements for financial instruments measured at fair value on a non-recurring basis
Discount adjustment for differences between comparable sales (as a percent)	3.00%
Non-recurring basis | Estimated Fair Value
Quantitative information about level 3 fair value measurements for financial instruments measured at fair value on a non-recurring basis
Impaired loans - held-for-investment, Fair Value	5,508,000	2,622,000
Foreclosed assets, Fair Value	1,267,000	31,000
Non-recurring basis | Estimated Fair Value | Foreclosed assets - land and construction
Quantitative information about level 3 fair value measurements for financial instruments measured at fair value on a non-recurring basis
Foreclosed assets, Fair Value		31,000
Non-recurring basis | Estimated Fair Value | Commercial
Quantitative information about level 3 fair value measurements for financial instruments measured at fair value on a non-recurring basis
Impaired loans - held-for-investment, Fair Value	461,000	859,000
Foreclosed assets, Fair Value	202,000
Non-recurring basis | Estimated Fair Value | Real estate | Commercial and residential
Quantitative information about level 3 fair value measurements for financial instruments measured at fair value on a non-recurring basis
Impaired loans - held-for-investment, Fair Value	3,898,000	587,000
Foreclosed assets, Fair Value	1,065,000
Non-recurring basis | Estimated Fair Value | Real estate | Land and construction
Quantitative information about level 3 fair value measurements for financial instruments measured at fair value on a non-recurring basis
Impaired loans - held-for-investment, Fair Value	1,149,000	1,176,000