Fair Value Measurements on a Non-Recurring Basis (Details) - Nonrecurring Measurements - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Assets with a recorded change from re-measuring at fair value on a non-recurring basis
Other real estate owned	$ 1,011	$ 2,296
Collateral-dependent impaired loans, net of ALLL	6,985	6,339
Total assets measured at fair value on a non-recurring basis	7,996	8,635
Level 1
Assets with a recorded change from re-measuring at fair value on a non-recurring basis
Other real estate owned	0	0
Collateral-dependent impaired loans, net of ALLL	0	0
Total assets measured at fair value on a non-recurring basis	0	0
Level 2
Assets with a recorded change from re-measuring at fair value on a non-recurring basis
Other real estate owned	0	0
Collateral-dependent impaired loans, net of ALLL	0	0
Total assets measured at fair value on a non-recurring basis	0	0
Level 3
Assets with a recorded change from re-measuring at fair value on a non-recurring basis
Other real estate owned	1,011	2,296
Collateral-dependent impaired loans, net of ALLL	6,985	6,339
Total assets measured at fair value on a non-recurring basis	$ 7,996	$ 8,635