Loans and Allowance for Lease and Loan Losses (Schedule of classes of the loan portfolio by the aging categories of performing loans and nonaccrual loans) (Details) - USD ($)	Dec. 31, 2020	Dec. 31, 2019
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	$ 858,608,000	$ 771,913,000
Total gross loans	876,616,000	789,517,000
Nonaccrual	6,335,000	8,921,000
Financing Receivable, 90 Days or More Past Due, Still Accruing	0	0
30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	11,616,000	7,961,000
60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	1,853,000	2,631,000
Greater Than 90 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	4,539,000	7,012,000
Commercial real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total gross loans	284,120,000	268,640,000
Commercial real estate | Undisbursed construction loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	5,392,000	20,354,000
Total gross loans	5,392,000	20,354,000
Commercial real estate | Non-residential
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	244,387,000	222,953,000
Total gross loans	248,349,000	228,157,000
Nonaccrual	1,944,000	3,911,000
Commercial real estate | Non-residential | 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	1,985,000	409,000
Commercial real estate | Non-residential | 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	33,000	884,000
Commercial real estate | Non-residential | Greater Than 90 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	1,944,000	3,911,000
Commercial real estate | Multifamily
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	30,379,000	19,744,000
Total gross loans	30,379,000	20,129,000
Nonaccrual		385,000
Commercial real estate | Multifamily | Greater Than 90 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due		385,000
Residential Real Estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	36,581,000	42,403,000
Total gross loans	39,239,000	43,726,000
Nonaccrual	2,641,000	2,341,000
Residential Real Estate | 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	1,351,000	427,000
Residential Real Estate | 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	138,000	116,000
Residential Real Estate | Greater Than 90 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	1,169,000	780,000
Commercial and industrial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	151,771,000	89,401,000
Total gross loans	154,016,000	90,554,000
Nonaccrual	366,000	905,000
Commercial and industrial | 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	1,551,000	288,000
Commercial and industrial | 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	511,000	198,000
Commercial and industrial | Greater Than 90 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	183,000	667,000
Consumer
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total gross loans	22,981,000	26,028,000
Consumer | Indirect automobile
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	367,929,000	351,840,000
Total gross loans	376,260,000	360,569,000
Nonaccrual	990,000	953,000
Consumer | Indirect automobile | 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	6,321,000	6,494,000
Consumer | Indirect automobile | 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	1,063,000	1,294,000
Consumer | Indirect automobile | Greater Than 90 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	947,000	941,000
Consumer | Home equity
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	13,506,000	15,726,000
Total gross loans	14,165,000	16,276,000
Nonaccrual	346,000	415,000
Consumer | Home equity | 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	310,000	142,000
Consumer | Home equity | 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	101,000	91,000
Consumer | Home equity | Greater Than 90 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	248,000	317,000
Consumer | Other consumer
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	8,663,000	9,492,000
Total gross loans	8,816,000	9,752,000
Nonaccrual	48,000	11,000
Consumer | Other consumer | 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	98,000	201,000
Consumer | Other consumer | 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	7,000	48,000
Consumer | Other consumer | Greater Than 90 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	$ 48,000	$ 11,000