Statement of Accounting Policies (Details Textual) - USD ($)	1 Months Ended		12 Months Ended
	Feb. 28, 2018	Feb. 24, 2017	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Jan. 01, 2019
Property, Plant and Equipment [Line Items]
Cash and Due from Banks				$ 55,962,000	$ 58,693,000
Amortization Of Mortgage Servicing Rights Excluding Valuation Adjustments				$ 3,800,000	$ 3,700,000	$ 3,600,000
Percentage Of Revenue				8.60%
Percentage Of Consolidated Net Income				4.50%
Percentage Of Assets				0.70%
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent				35.00%	35.00%
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life		10 years
Cumulative Effect on Retained Earnings, Net of Tax	$ 47,000			$ 0
Revenue from Wealth Management				821,000
Trust Income				2,091,000	$ 2,332,000	1,701,000
Gains (Losses) on Sales of Other Real Estate				(581,000)	56,000	300,000
Insurance Commissions and Fees				14,085,000	12,866,000	10,441,000
Minimum Amount of Loans To be Evaluated Individually for Impairment				250,000
Income Tax Expense (Benefit), Continuing Operations, Adjustment of Deferred Tax (Asset) Liability				$ 0	$ 154,000	$ 0
Percentage of Loan to Value				80.00%
Other Non Interest Income [Member]
Property, Plant and Equipment [Line Items]
Gains (Losses) on Sales of Other Real Estate				$ 28,000,000,000
Deposit Account [Member]
Property, Plant and Equipment [Line Items]
Revenues				7,600,000
Credit and Debit Card [Member]
Property, Plant and Equipment [Line Items]
Revenues				4,100,000
New Renewal Policies [Member]
Property, Plant and Equipment [Line Items]
Insurance Commissions and Fees				13,100,000
Contigent Policies [Member]
Property, Plant and Equipment [Line Items]
Insurance Commissions and Fees				1,000,000
Scenario, Plan [Member]
Property, Plant and Equipment [Line Items]
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent			21.00%
Accounting Standards Update 2016-02 [Member] | Subsequent Event [Member]
Property, Plant and Equipment [Line Items]
Operating Lease, Right-of-Use Asset							$ 8,800,000
Operating Lease, Liability							$ 9,300,000
Federal Reserve [Member]
Property, Plant and Equipment [Line Items]
Cash and Due from Banks				1,048,000
FHLB of Cincinnati [Member]
Property, Plant and Equipment [Line Items]
Balance Of Stock				14,200,000
FHLB of Indianapolis [Member]
Property, Plant and Equipment [Line Items]
Balance Of Stock				2,500
Federal Home Loan Bank [Member]
Property, Plant and Equipment [Line Items]
Cash and Due from Banks				$ 1,723,000
Core Deposit and Customer Relationship [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life				20 years
Core Deposit and Customer Relationship [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life				10 years