Fair Value Accounting (Details 1) - Fair Value on a Nonrecurring Basis [Member] - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2018	Dec. 31, 2017
Assets
Impaired loans	$ 9,730	$ 8,769
Other real estate owned	117	242
Total assets measured at fair value on a nonrecurring basis	9,847	9,011
Level 1 [Member]
Assets
Impaired loans
Other real estate owned
Total assets measured at fair value on a nonrecurring basis
Level 2 [Member]
Assets
Impaired loans	1,391	2,685
Other real estate owned	23	148
Total assets measured at fair value on a nonrecurring basis	1,414	2,833
Level 3 [Member]
Assets
Impaired loans	8,339	6,084
Other real estate owned	94	94
Total assets measured at fair value on a nonrecurring basis	$ 8,433	$ 6,178