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Loans, Loan Portfolio Aging Analysis, Segregated by Class (Details) - USD ($) | 6 Months Ended |
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Jun. 30, 2020 | Dec. 31, 2019
Bank's Loan portfolio aging analysis, segregated by class [Abstract] |  |  |  |
Total Past Due |  | $ 43,774,000 | $ 55,255,000 |
Current |  | 3,494,996,000 | 3,193,409,000 |
Total Loans |  | 3,538,770,000 | 3,248,664,000 |
90+ and Accruing |  | 21,799,000 | 19,620,000 | [1]
30-59 Days Past Due [Member] |  |  |  |
Bank's Loan portfolio aging analysis, segregated by class [Abstract] |  |  |  |
Total Past Due |  | 8,769,000 | 10,689,000 |
60-89 Days Past Due [Member] |  |  |  |
Bank's Loan portfolio aging analysis, segregated by class [Abstract] |  |  |  |
Total Past Due |  | 5,796,000 | 13,232,000 |
90+ Days Past Due [Member] |  |  |  |
Bank's Loan portfolio aging analysis, segregated by class [Abstract] |  |  |  |
Total Past Due |  | 29,209,000 | 31,334,000 |
Commercial [Member] |  |  |  |
Bank's Loan portfolio aging analysis, segregated by class [Abstract] |  |  |  |
Total Past Due |  | 26,547,000 |  |
Current |  | 1,879,462,000 |  |
Total Loans |  | 1,906,009,000 | 1,664,948,000 |
90+ and Accruing |  | 16,559,000 |  |
Commercial [Member] | 30-59 Days Past Due [Member] |  |  |  |
Bank's Loan portfolio aging analysis, segregated by class [Abstract] |  |  |  |
Total Past Due |  | 4,162,000 |  |
Commercial [Member] | 60-89 Days Past Due [Member] |  |  |  |
Bank's Loan portfolio aging analysis, segregated by class [Abstract] |  |  |  |
Total Past Due |  | 927,000 |  |
Commercial [Member] | 90+ Days Past Due [Member] |  |  |  |
Bank's Loan portfolio aging analysis, segregated by class [Abstract] |  |  |  |
Total Past Due |  | 21,458,000 |  |
Commercial [Member] | Hotel/Motel [Member] |  |  |  |
Bank's Loan portfolio aging analysis, segregated by class [Abstract] |  |  |  |
Total Past Due |  | 132,000 |  |
Current |  | 257,113,000 |  |
Total Loans |  | 257,245,000 |  |
90+ and Accruing |  | $ 132,000 |  |
Percentage of total loan |  | 7.30% |  |
Minimum threshold amount of loans requiring performance bond |  | $ 500,000 |  |
Commercial [Member] | Hotel/Motel [Member] | 30-59 Days Past Due [Member] |  |  |  |
Bank's Loan portfolio aging analysis, segregated by class [Abstract] |  |  |  |
Total Past Due |  | 0 |  |
Commercial [Member] | Hotel/Motel [Member] | 60-89 Days Past Due [Member] |  |  |  |
Bank's Loan portfolio aging analysis, segregated by class [Abstract] |  |  |  |
Total Past Due |  | 0 |  |
Commercial [Member] | Hotel/Motel [Member] | 90+ Days Past Due [Member] |  |  |  |
Bank's Loan portfolio aging analysis, segregated by class [Abstract] |  |  |  |
Total Past Due |  | 132,000 |  |
Commercial [Member] | Commercial Real Estate Residential [Member] |  |  |  |
Bank's Loan portfolio aging analysis, segregated by class [Abstract] |  |  |  |
Total Past Due |  | 8,176,000 |  |
Current |  | 249,341,000 |  |
Total Loans |  | 257,517,000 |  |
90+ and Accruing |  | 5,799,000 |  |
Minimum threshold amount of loans requiring performance bond |  | 500,000 |  |
Commercial [Member] | Commercial Real Estate Residential [Member] | 30-59 Days Past Due [Member] |  |  |  |
Bank's Loan portfolio aging analysis, segregated by class [Abstract] |  |  |  |
Total Past Due |  | 881,000 |  |
Commercial [Member] | Commercial Real Estate Residential [Member] | 60-89 Days Past Due [Member] |  |  |  |
Bank's Loan portfolio aging analysis, segregated by class [Abstract] |  |  |  |
Total Past Due |  | 90,000 |  |
Commercial [Member] | Commercial Real Estate Residential [Member] | 90+ Days Past Due [Member] |  |  |  |
Bank's Loan portfolio aging analysis, segregated by class [Abstract] |  |  |  |
Total Past Due |  | 7,205,000 |  |
Commercial [Member] | Commercial Real Estate Nonresidential [Member] |  |  |  |
Bank's Loan portfolio aging analysis, segregated by class [Abstract] |  |  |  |
Total Past Due |  | 15,241,000 |  |
Current |  | 757,296,000 |  |
Total Loans |  | 772,537,000 |  |
90+ and Accruing |  | 10,276,000 |  |
Minimum threshold amount of loans requiring performance bond |  | 500,000 |  |
Commercial [Member] | Commercial Real Estate Nonresidential [Member] | 30-59 Days Past Due [Member] |  |  |  |
Bank's Loan portfolio aging analysis, segregated by class [Abstract] |  |  |  |
Total Past Due |  | 2,810,000 |  |
Commercial [Member] | Commercial Real Estate Nonresidential [Member] | 60-89 Days Past Due [Member] |  |  |  |
Bank's Loan portfolio aging analysis, segregated by class [Abstract] |  |  |  |
Total Past Due |  | 420,000 |  |
Commercial [Member] | Commercial Real Estate Nonresidential [Member] | 90+ Days Past Due [Member] |  |  |  |
Bank's Loan portfolio aging analysis, segregated by class [Abstract] |  |  |  |
Total Past Due |  | 12,011,000 |  |
Commercial [Member] | Dealer Floorplans [Member] |  |  |  |
Bank's Loan portfolio aging analysis, segregated by class [Abstract] |  |  |  |
Total Past Due |  | 0 |  |
Current |  | 62,909,000 |  |
Total Loans |  | 62,909,000 |  |
Commercial [Member] | Dealer Floorplans [Member] | 30-59 Days Past Due [Member] |  |  |  |
Bank's Loan portfolio aging analysis, segregated by class [Abstract] |  |  |  |
Total Past Due |  | 0 |  |
Commercial [Member] | Dealer Floorplans [Member] | 60-89 Days Past Due [Member] |  |  |  |
Bank's Loan portfolio aging analysis, segregated by class [Abstract] |  |  |  |
Total Past Due |  | 0 |  |
Commercial [Member] | Dealer Floorplans [Member] | 90+ Days Past Due [Member] |  |  |  |
Bank's Loan portfolio aging analysis, segregated by class [Abstract] |  |  |  |
Total Past Due |  | 0 |  |
Commercial [Member] | Commercial Other [Member] |  |  |  |
Bank's Loan portfolio aging analysis, segregated by class [Abstract] |  |  |  |
Total Past Due |  | 2,998,000 | 7,431,000 |
Current |  | 285,852,000 | 382,252,000 |
Total Loans |  | 288,850,000 | 389,683,000 |
90+ and Accruing |  | 352,000 | 2,586,000 | [1]
Commercial [Member] | Commercial Other [Member] | 30-59 Days Past Due [Member] |  |  |  |
Bank's Loan portfolio aging analysis, segregated by class [Abstract] |  |  |  |
Total Past Due |  | 471,000 | 880,000 |
Commercial [Member] | Commercial Other [Member] | 60-89 Days Past Due [Member] |  |  |  |
Bank's Loan portfolio aging analysis, segregated by class [Abstract] |  |  |  |
Total Past Due |  | 417,000 | 284,000 |
Commercial [Member] | Commercial Other [Member] | 90+ Days Past Due [Member] |  |  |  |
Bank's Loan portfolio aging analysis, segregated by class [Abstract] |  |  |  |
Total Past Due |  | 2,110,000 | 6,267,000 |
Commercial [Member] | Commercial Unsecured SBA PPP [Member] |  |  |  |
Bank's Loan portfolio aging analysis, segregated by class [Abstract] |  |  |  |
Total Past Due |  | 0 |  |
Current |  | 266,951,000 |  |
Total Loans |  | 266,951,000 |  |
Commercial [Member] | Commercial Unsecured SBA PPP [Member] | 30-59 Days Past Due [Member] |  |  |  |
Bank's Loan portfolio aging analysis, segregated by class [Abstract] |  |  |  |
Total Past Due |  | 0 |  |
Commercial [Member] | Commercial Unsecured SBA PPP [Member] | 60-89 Days Past Due [Member] |  |  |  |
Bank's Loan portfolio aging analysis, segregated by class [Abstract] |  |  |  |
Total Past Due |  | 0 |  |
Commercial [Member] | Commercial Unsecured SBA PPP [Member] | 90+ Days Past Due [Member] |  |  |  |
Bank's Loan portfolio aging analysis, segregated by class [Abstract] |  |  |  |
Total Past Due |  | 0 |  |
Commercial [Member] | Construction [Member] |  |  |  |
Bank's Loan portfolio aging analysis, segregated by class [Abstract] |  |  |  |
Total Past Due |  |  | 585,000 |
Current |  |  | 104,224,000 |
Total Loans |  |  | 104,809,000 |
90+ and Accruing | [1] |  | 237,000 |
Commercial [Member] | Construction [Member] | 30-59 Days Past Due [Member] |  |  |  |
Bank's Loan portfolio aging analysis, segregated by class [Abstract] |  |  |  |
Total Past Due |  |  | 118,000 |
Commercial [Member] | Construction [Member] | 60-89 Days Past Due [Member] |  |  |  |
Bank's Loan portfolio aging analysis, segregated by class [Abstract] |  |  |  |
Total Past Due |  |  | 0 |
Commercial [Member] | Construction [Member] | 90+ Days Past Due [Member] |  |  |  |
Bank's Loan portfolio aging analysis, segregated by class [Abstract] |  |  |  |
Total Past Due |  |  | 467,000 |
Commercial [Member] | Real Estate Mortgage [Member] |  |  |  |
Bank's Loan portfolio aging analysis, segregated by class [Abstract] |  |  |  |
Total Past Due |  |  | 21,069,000 |
Current |  |  | 1,148,906,000 |
Total Loans |  |  | 1,169,975,000 |
90+ and Accruing | [1] |  | 8,820,000 |
Commercial [Member] | Real Estate Mortgage [Member] | 30-59 Days Past Due [Member] |  |  |  |
Bank's Loan portfolio aging analysis, segregated by class [Abstract] |  |  |  |
Total Past Due |  |  | 2,734,000 |
Commercial [Member] | Real Estate Mortgage [Member] | 60-89 Days Past Due [Member] |  |  |  |
Bank's Loan portfolio aging analysis, segregated by class [Abstract] |  |  |  |
Total Past Due |  |  | 5,969,000 |
Commercial [Member] | Real Estate Mortgage [Member] | 90+ Days Past Due [Member] |  |  |  |
Bank's Loan portfolio aging analysis, segregated by class [Abstract] |  |  |  |
Total Past Due |  |  | 12,366,000 |
Commercial [Member] | Equipment Lease Financing [Member] |  |  |  |
Bank's Loan portfolio aging analysis, segregated by class [Abstract] |  |  |  |
Total Past Due |  |  | 0 |
Current |  |  | 481,000 |
Total Loans |  |  | 481,000 |
90+ and Accruing | [1] |  | 0 |
Commercial [Member] | Equipment Lease Financing [Member] | 30-59 Days Past Due [Member] |  |  |  |
Bank's Loan portfolio aging analysis, segregated by class [Abstract] |  |  |  |
Total Past Due |  |  | 0 |
Commercial [Member] | Equipment Lease Financing [Member] | 60-89 Days Past Due [Member] |  |  |  |
Bank's Loan portfolio aging analysis, segregated by class [Abstract] |  |  |  |
Total Past Due |  |  | 0 |
Commercial [Member] | Equipment Lease Financing [Member] | 90+ Days Past Due [Member] |  |  |  |
Bank's Loan portfolio aging analysis, segregated by class [Abstract] |  |  |  |
Total Past Due |  |  | 0 |
Residential [Member] |  |  |  |
Bank's Loan portfolio aging analysis, segregated by class [Abstract] |  |  |  |
Total Past Due |  | 13,426,000 |  |
Current |  | 875,737,000 |  |
Total Loans |  | 889,163,000 |  |
90+ and Accruing |  | 4,622,000 |  |
Residential [Member] | 30-59 Days Past Due [Member] |  |  |  |
Bank's Loan portfolio aging analysis, segregated by class [Abstract] |  |  |  |
Total Past Due |  | 2,312,000 |  |
Residential [Member] | 60-89 Days Past Due [Member] |  |  |  |
Bank's Loan portfolio aging analysis, segregated by class [Abstract] |  |  |  |
Total Past Due |  | 4,256,000 |  |
Residential [Member] | 90+ Days Past Due [Member] |  |  |  |
Bank's Loan portfolio aging analysis, segregated by class [Abstract] |  |  |  |
Total Past Due |  | 6,858,000 |  |
Residential [Member] | Construction [Member] |  |  |  |
Bank's Loan portfolio aging analysis, segregated by class [Abstract] |  |  |  |
Total Past Due |  |  | 803,000 |
Current |  |  | 62,547,000 |
Total Loans |  |  | 63,350,000 |
90+ and Accruing | [1] |  | 0 |
Residential [Member] | Construction [Member] | 30-59 Days Past Due [Member] |  |  |  |
Bank's Loan portfolio aging analysis, segregated by class [Abstract] |  |  |  |
Total Past Due |  |  | 117,000 |
Residential [Member] | Construction [Member] | 60-89 Days Past Due [Member] |  |  |  |
Bank's Loan portfolio aging analysis, segregated by class [Abstract] |  |  |  |
Total Past Due |  |  | 52,000 |
Residential [Member] | Construction [Member] | 90+ Days Past Due [Member] |  |  |  |
Bank's Loan portfolio aging analysis, segregated by class [Abstract] |  |  |  |
Total Past Due |  |  | 634,000 |
Residential [Member] | Real Estate Mortgage [Member] |  |  |  |
Bank's Loan portfolio aging analysis, segregated by class [Abstract] |  |  |  |
Total Past Due |  | 11,491,000 | 16,470,000 |
Current |  | 769,141,000 | 716,533,000 |
Total Loans |  | 780,632,000 | 733,003,000 |
90+ and Accruing |  | 4,140,000 | 7,088,000 | [1]
Residential [Member] | Real Estate Mortgage [Member] | 30-59 Days Past Due [Member] |  |  |  |
Bank's Loan portfolio aging analysis, segregated by class [Abstract] |  |  |  |
Total Past Due |  | 1,595,000 | 774,000 |
Residential [Member] | Real Estate Mortgage [Member] | 60-89 Days Past Due [Member] |  |  |  |
Bank's Loan portfolio aging analysis, segregated by class [Abstract] |  |  |  |
Total Past Due |  | 3,825,000 | 5,376,000 |
Residential [Member] | Real Estate Mortgage [Member] | 90+ Days Past Due [Member] |  |  |  |
Bank's Loan portfolio aging analysis, segregated by class [Abstract] |  |  |  |
Total Past Due |  | 6,071,000 | 10,320,000 |
Residential [Member] | Home Equity Lines [Member] |  |  |  |
Bank's Loan portfolio aging analysis, segregated by class [Abstract] |  |  |  |
Total Past Due |  | 1,935,000 | 2,232,000 |
Current |  | 106,596,000 | 109,662,000 |
Total Loans |  | 108,531,000 | 111,894,000 |
90+ and Accruing |  | 482,000 | 344,000 | [1]
Residential [Member] | Home Equity Lines [Member] | 30-59 Days Past Due [Member] |  |  |  |
Bank's Loan portfolio aging analysis, segregated by class [Abstract] |  |  |  |
Total Past Due |  | 717,000 | 1,084,000 |
Residential [Member] | Home Equity Lines [Member] | 60-89 Days Past Due [Member] |  |  |  |
Bank's Loan portfolio aging analysis, segregated by class [Abstract] |  |  |  |
Total Past Due |  | 431,000 | 412,000 |
Residential [Member] | Home Equity Lines [Member] | 90+ Days Past Due [Member] |  |  |  |
Bank's Loan portfolio aging analysis, segregated by class [Abstract] |  |  |  |
Total Past Due |  | 787,000 | 736,000 |
Consumer [Member] |  |  |  |
Bank's Loan portfolio aging analysis, segregated by class [Abstract] |  |  |  |
Total Past Due |  | 3,801,000 |  |
Current |  | 739,797,000 |  |
Total Loans |  | 743,598,000 |  |
90+ and Accruing |  | 618,000 |  |
Consumer [Member] | 30-59 Days Past Due [Member] |  |  |  |
Bank's Loan portfolio aging analysis, segregated by class [Abstract] |  |  |  |
Total Past Due |  | 2,295,000 |  |
Consumer [Member] | 60-89 Days Past Due [Member] |  |  |  |
Bank's Loan portfolio aging analysis, segregated by class [Abstract] |  |  |  |
Total Past Due |  | 613,000 |  |
Consumer [Member] | 90+ Days Past Due [Member] |  |  |  |
Bank's Loan portfolio aging analysis, segregated by class [Abstract] |  |  |  |
Total Past Due |  | 893,000 |  |
Consumer [Member] | Consumer Direct [Member] |  |  |  |
Bank's Loan portfolio aging analysis, segregated by class [Abstract] |  |  |  |
Total Past Due |  | 848,000 | 1,272,000 |
Current |  | 146,436,000 | 146,779,000 |
Total Loans |  | 147,284,000 | 148,051,000 |
90+ and Accruing |  | 97,000 | 97,000 | [1]
Consumer [Member] | Consumer Direct [Member] | 30-59 Days Past Due [Member] |  |  |  |
Bank's Loan portfolio aging analysis, segregated by class [Abstract] |  |  |  |
Total Past Due |  | 360,000 | 945,000 |
Consumer [Member] | Consumer Direct [Member] | 60-89 Days Past Due [Member] |  |  |  |
Bank's Loan portfolio aging analysis, segregated by class [Abstract] |  |  |  |
Total Past Due |  | 116,000 | 230,000 |
Consumer [Member] | Consumer Direct [Member] | 90+ Days Past Due [Member] |  |  |  |
Bank's Loan portfolio aging analysis, segregated by class [Abstract] |  |  |  |
Total Past Due |  | 372,000 | 97,000 |
Consumer [Member] | Consumer Indirect [Member] |  |  |  |
Bank's Loan portfolio aging analysis, segregated by class [Abstract] |  |  |  |
Total Past Due |  | 2,953,000 | 5,393,000 |
Current |  | 593,361,000 | 522,025,000 |
Total Loans |  | 596,314,000 | 527,418,000 |
90+ and Accruing |  | 521,000 | 448,000 | [1]
Consumer [Member] | Consumer Indirect [Member] | 30-59 Days Past Due [Member] |  |  |  |
Bank's Loan portfolio aging analysis, segregated by class [Abstract] |  |  |  |
Total Past Due |  | 1,935,000 | 4,037,000 |
Consumer [Member] | Consumer Indirect [Member] | 60-89 Days Past Due [Member] |  |  |  |
Bank's Loan portfolio aging analysis, segregated by class [Abstract] |  |  |  |
Total Past Due |  | 497,000 | 909,000 |
Consumer [Member] | Consumer Indirect [Member] | 90+ Days Past Due [Member] |  |  |  |
Bank's Loan portfolio aging analysis, segregated by class [Abstract] |  |  |  |
Total Past Due |  | $ 521,000 | $ 447,000 |
[1] | 90+ and Accruing are also included in 90+ Days Past Due column.

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