Loans - Nonperforming Loans (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016	Sep. 30, 2016
Nonaccrual loans	$ 2,560	$ 3,059	$ 4,496
Restructured and loans over 90 days past due and still accruing	931
Total nonperforming loans	3,491	3,059	4,496
Other restructured loans	325	131	137
Total	$ 3,816	$ 3,190	$ 4,633