Fair Value - Financial Assets and Liabilities Measured on a Non-Recurring Basis (Details) - Non-recurring basis - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Financial Assets and Liabilities Measured on a Non-Recurring Basis
Impaired loans - held-for-investment:	$ 2,702	$ 2,622
Foreclosed assets		31
Land and construction
Financial Assets and Liabilities Measured on a Non-Recurring Basis
Foreclosed assets		31
Commercial
Financial Assets and Liabilities Measured on a Non-Recurring Basis
Impaired loans - held-for-investment:	1,333	859
Real estate | Commercial and residential
Financial Assets and Liabilities Measured on a Non-Recurring Basis
Impaired loans - held-for-investment:	503	587
Real estate | Land and construction
Financial Assets and Liabilities Measured on a Non-Recurring Basis
Impaired loans - held-for-investment:	219	1,176
Real estate | Home equity
Financial Assets and Liabilities Measured on a Non-Recurring Basis
Impaired loans - held-for-investment:	647
Significant Unobservable Inputs (Level 3)
Financial Assets and Liabilities Measured on a Non-Recurring Basis
Impaired loans - held-for-investment:	2,702	2,622
Foreclosed assets		31
Significant Unobservable Inputs (Level 3) | Land and construction
Financial Assets and Liabilities Measured on a Non-Recurring Basis
Foreclosed assets		31
Significant Unobservable Inputs (Level 3) | Commercial
Financial Assets and Liabilities Measured on a Non-Recurring Basis
Impaired loans - held-for-investment:	1,333	859
Significant Unobservable Inputs (Level 3) | Real estate | Commercial and residential
Financial Assets and Liabilities Measured on a Non-Recurring Basis
Impaired loans - held-for-investment:	503	587
Significant Unobservable Inputs (Level 3) | Real estate | Land and construction
Financial Assets and Liabilities Measured on a Non-Recurring Basis
Impaired loans - held-for-investment:	219	$ 1,176
Significant Unobservable Inputs (Level 3) | Real estate | Home equity
Financial Assets and Liabilities Measured on a Non-Recurring Basis
Impaired loans - held-for-investment:	$ 647