Loans and Allowance for Loan Losses - Credit Quality Indicators (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Credit Quality Indicators
Minimum outstanding balance of loans to be reviewed on a monthly basis	$ 25
Total loans	347,013	$ 330,782
Pass
Credit Quality Indicators
Total loans	339,898	320,467
Special Mention
Credit Quality Indicators
Total loans	763	5,753
Substandard
Credit Quality Indicators
Total loans	6,352	4,562
Commercial | Commercial
Credit Quality Indicators
Total loans	55,132	53,516
Commercial | Commercial | Pass
Credit Quality Indicators
Total loans	55,053	53,316
Commercial | Commercial | Substandard
Credit Quality Indicators
Total loans	79	200
Real estate | Residential Real Estate
Credit Quality Indicators
Total loans	81,306	79,680
Real estate | Residential Real Estate | Pass
Credit Quality Indicators
Total loans	80,788	79,033
Real estate | Residential Real Estate | Substandard
Credit Quality Indicators
Total loans	518	647
Construction | Commercial Real Estate
Credit Quality Indicators
Total loans	28,511	24,167
Construction | Commercial Real Estate | Pass
Credit Quality Indicators
Total loans	28,511	24,167
Auto | Consumer
Credit Quality Indicators
Total loans	1,242	1,425
Auto | Consumer | Pass
Credit Quality Indicators
Total loans	1,242	1,425
Other | Commercial Real Estate
Credit Quality Indicators
Total loans	178,337	169,290
Other | Commercial Real Estate | Pass
Credit Quality Indicators
Total loans	171,830	159,829
Other | Commercial Real Estate | Special Mention
Credit Quality Indicators
Total loans	763	5,753
Other | Commercial Real Estate | Substandard
Credit Quality Indicators
Total loans	5,744	3,708
Other | Consumer
Credit Quality Indicators
Total loans	2,485	2,704
Other | Consumer | Pass
Credit Quality Indicators
Total loans	2,474	2,697
Other | Consumer | Substandard
Credit Quality Indicators
Total loans	$ 11	$ 7