Fair Value - Quantitative Information about Level 3 Fair Value Measurements (Details) - Non-recurring basis - USD ($) $ in Thousands	12 Months Ended
	Dec. 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
Impaired loans - held-for-investment, Fair Value	$ 2,702	$ 2,622
Foreclosed assets, Fair Value		31
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
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	1,333	859
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	503	587
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	219	1,176
Real estate | Home equity
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	647
Significant Unobservable Inputs (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	2,702	2,622
Foreclosed assets, Fair Value		31
Significant Unobservable Inputs (Level 3) | 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
Significant Unobservable Inputs (Level 3) | 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%
Significant Unobservable Inputs (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	$ 1,333	$ 859
Significant Unobservable Inputs (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%
Significant Unobservable Inputs (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)	5.00%	3.00%
Significant Unobservable Inputs (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)	5.00%	3.00%
Significant Unobservable Inputs (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	$ 503	$ 587
Significant Unobservable Inputs (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%
Significant Unobservable Inputs (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%
Significant Unobservable Inputs (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%
Significant Unobservable Inputs (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	$ 219	$ 1,176
Significant Unobservable Inputs (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%
Significant Unobservable Inputs (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)	1.00%	2.00%
Significant Unobservable Inputs (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%
Significant Unobservable Inputs (Level 3) | Real estate | Home equity
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	$ 647
Significant Unobservable Inputs (Level 3) | Real estate | Home equity | 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%
Significant Unobservable Inputs (Level 3) | Real estate | Home equity | 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%
Significant Unobservable Inputs (Level 3) | Real estate | Home equity | 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%