Deposits Deposit Interest Components (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Deposits [Abstract]
Interest-bearing demand	$ 588	$ 274	$ 117
Savings	486	445	398
Money market	1,224	719	605
Time deposits	1,697	1,275	1,162
Total	$ 3,995	$ 2,713	$ 2,282