Other Real Estate Owned - Change in OREO (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Changes in the balance for OREO
Balance at the beginning of year, gross	$ 225	$ 281
Transfers between loans and other real estate owned	98	208	$ 618
Charge-offs		(29)
Sales proceeds	(18)	(245)
(Loss) gain on disposition	(2)	10	134
Balance at the end of year, gross	303	225	281
Less allowance for losses	(57)	(57)	$ (86)	$ (56)
Balance at the end of the year, net	$ 246	$ 168