Income Taxes Temporary Differences (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Effective Income Tax Rate [Line Items]
Allowance for loan losses	$ 7,512	$ 7,251
Available-for-sale investment securities	0	2,644
Deferred compensation	3,487	3,593
Supplemental retirement	133	152
Core deposit premium and other intangible assets	889	657
Stock compensation expense	54	43
Deferred Tax Assets, Deferred Income	521	0
Acquisition costs	265	190
Other	749	977
Total gross deferred tax assets	13,610	15,507
Deferred loan costs	13	126
Intangibles amortization	4,584	4,135
Prepaid expenses	754	297
Deferred Tax Liabilities, Other	23	232
FHLB stock dividend	0	81
Deferred Tax Liabilities, Intangible Assets	7,906	6,066
Depreciation	2,500	2,149
Accumulated accretion	304	199
Mortgage servicing rights	411	578
Purchase Accounting	3,415	0
Total gross deferred tax liabilities	19,910	13,863
Deferred Tax Liabilities, Net	$ (6,300)
Net deferred tax assets (liabilities)		$ 1,644
Statutory U.S. Federal Tax Rate	21.00%	35.00%
Scenario, Plan [Member]
Effective Income Tax Rate [Line Items]
Statutory U.S. Federal Tax Rate	21.00%