Deposits - Interest Expense on Deposits (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Deposits [Abstract]
Interest-bearing demand accounts	$ 67	$ 63	$ 59
Money market accounts	418	404	388
Savings accounts	489	470	511
Certificates of deposit $100,000 and greater	707	754	292
Certificates of deposit less than $100,000	189	248	169
Total deposits	$ 1,870	$ 1,939	$ 1,419