Loans and Leases (Narrative) (Details) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Dec. 31, 2020 USD ($) loan	Sep. 30, 2020 USD ($) loan	Dec. 31, 2020 USD ($)	Sep. 30, 2020 USD ($) loan	Dec. 31, 2020 USD ($) loan contract item	Dec. 31, 2019 USD ($) contract loan item	Jun. 30, 2020 USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loan Balance	$ 1,120,811		$ 1,120,811		$ 1,120,811	$ 754,313
Deferred fee income	1,700		1,700		1,700
Deferred loan costs	1,700		1,700		1,700	3,000
Total Loans Receivables	$ 1,105,450		1,105,450		1,105,450	743,663
Number of loans with improvement in collateral value | loan	1	3
Number of loans with actual payments exceeding estimates | loan	2	2
Reclassification from non-accretable difference	$ 237	$ 192			429
Mortgages serviced	366,500		366,500		366,500	302,300
Mortgage servicing rights	1,300		1,300		1,300	1,000
Allowance for impaired loans	1,206		1,206		1,206	908
Impaired loans	6,340		6,340		6,340	$ 4,665
Financing receivable, net	663,054		663,054		$ 663,054
Number of contracts modified by TDR with subsequent default | contract					2
Number of dealerships | item					2
Direct finance lease receivable	6,000		6,000		$ 6,000	$ 4,700
Direct finance lease residual value	12,900		12,900		12,900	10,800
COVID-19 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loan Balance	1,120,811		1,120,811		$ 1,120,811
Number of loans modified | loan					10
Total Modification Balance	2,206		2,206		$ 2,206		$ 201,800
Reduction in total modification balance			$ 199,600
Reduction in total modification balance, percentage			99.00%
Commercial And Industrial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loan Balance	280,757		$ 280,757		280,757	122,594
Total Loans Receivables	280,800		280,800		280,800	122,600
Increase in loans and leases, net	158,200		158,200		158,200
Allowance for impaired loans	213		213		213	221
Impaired loans	590		590		590	336
Financing receivable, net	280,757		280,757		$ 280,757	$ 122,594
Number of contracts modified by TDR with subsequent default | contract					2
Commercial And Industrial [Member] | COVID-19 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loan Balance	280,757		280,757		$ 280,757
Number of loans modified | loan					1
Total Modification Balance	881		881		$ 881
Troubled Debt Status [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for impaired loans	700		700		700	$ 200
Accruing TDR Balance [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Troubled Debt Restructuring balance	2,500		2,500		2,500	1,000
Non-Accrual Status [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Troubled Debt Restructuring balance	700		700		700	600
Financing receivable, net	3,800		3,800		$ 3,800	$ 3,700
Number of loans classified as TDRs | loan					4	2
Number of unrelated borrowers that had loans modified in a TDR | item					3	2
Paycheck Protection Program [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loan Balance	132,100	$ 159,100	132,100	$ 159,100	$ 132,100
Deferred fee income	2,200		2,200		$ 2,200
Number of loans | loan				1,551	1,246
Decrease in loan balance	$ 27,000		$ 27,000		$ 27,000
Percentage decrease in loan balance	17.00%		17.00%		17.00%
Deferred fee income before costs	$ 5,600		$ 5,600		$ 5,600
Fee income recognized					3,300
Paycheck Protection Program [Member] | Commercial And Industrial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Increase in loans and leases, net	129,900		129,900		129,900
Originated Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loan Balance	910,921		910,921		910,921
Total Loans Receivables	895,560		895,560		895,560
Financing receivable, net	502,200		502,200		502,200
Originated Loans [Member] | Commercial And Industrial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loan Balance	257,277		257,277		257,277
Financing receivable, net	257,277		257,277		257,277
Acquired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loan Balance	209,890		209,890		209,890
Total Loans Receivables	209,890		209,890		209,890
Financing receivable, net	160,854		160,854		160,854
Acquired Loans [Member] | Commercial And Industrial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loan Balance	23,480		23,480		23,480
Financing receivable, net	23,480		23,480		23,480
MNB Corporation [Member] | Commercial And Industrial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Increase in loans and leases, net	$ 23,500		$ 23,500		$ 23,500