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Loans, Loan Portfolio Aging Analysis, Segregated by Class (Details) - USD ($) | 6 Months Ended |
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Jun. 30, 2019 | Dec. 31, 2018
Bank's Loan portfolio aging analysis, segregated by class [Abstract] |  |  |
Total Past Due |  | $ 53,036,000 | $ 43,546,000
Current |  | 3,139,171,000 | 3,165,092,000
Total Loans |  | 3,192,207,000 | 3,208,638,000
90+ and Accruing | [1] | 11,076,000 | 10,198,000
Minimum threshold amount of loans requiring performance bond |  | 500,000 |
30-59 Days Past Due [Member] |  |  |
Bank's Loan portfolio aging analysis, segregated by class [Abstract] |  |  |
Total Past Due |  | 12,180,000 | 15,378,000
60-89 Days Past Due [Member] |  |  |
Bank's Loan portfolio aging analysis, segregated by class [Abstract] |  |  |
Total Past Due |  | 20,249,000 | 8,970,000
90+ Days Past Due [Member] |  |  |
Bank's Loan portfolio aging analysis, segregated by class [Abstract] |  |  |
Total Past Due |  | $ 20,607,000 | 19,198,000
Equipment Lease Financing [Member] |  |  |
Bank's Loan portfolio aging analysis, segregated by class [Abstract] |  |  |
Financing percentage requested for underwriting loans |  | 100.00% |
Commercial [Member] |  |  |
Bank's Loan portfolio aging analysis, segregated by class [Abstract] |  |  |
Total Loans |  | $ 1,649,549,000 | 1,644,746,000
Commercial [Member] | Construction [Member] |  |  |
Bank's Loan portfolio aging analysis, segregated by class [Abstract] |  |  |
Total Past Due |  | 632,000 | 843,000
Current |  | 65,139,000 | 81,872,000
Total Loans |  | 65,771,000 | 82,715,000
90+ and Accruing | [1] | 36,000 | 58,000
Commercial [Member] | Construction [Member] | 30-59 Days Past Due [Member] |  |  |
Bank's Loan portfolio aging analysis, segregated by class [Abstract] |  |  |
Total Past Due |  | 56,000 | 87,000
Commercial [Member] | Construction [Member] | 60-89 Days Past Due [Member] |  |  |
Bank's Loan portfolio aging analysis, segregated by class [Abstract] |  |  |
Total Past Due |  | 30,000 | 58,000
Commercial [Member] | Construction [Member] | 90+ Days Past Due [Member] |  |  |
Bank's Loan portfolio aging analysis, segregated by class [Abstract] |  |  |
Total Past Due |  | 546,000 | 698,000
Commercial [Member] | Real Estate [Member] |  |  |
Bank's Loan portfolio aging analysis, segregated by class [Abstract] |  |  |
Total Past Due |  | 26,246,000 | 16,267,000
Current |  | 1,166,522,000 | 1,166,826,000
Total Loans |  | 1,192,768,000 | 1,183,093,000
90+ and Accruing | [1] | 5,816,000 | 4,632,000
Commercial [Member] | Real Estate [Member] | 30-59 Days Past Due [Member] |  |  |
Bank's Loan portfolio aging analysis, segregated by class [Abstract] |  |  |
Total Past Due |  | 4,593,000 | 6,287,000
Commercial [Member] | Real Estate [Member] | 60-89 Days Past Due [Member] |  |  |
Bank's Loan portfolio aging analysis, segregated by class [Abstract] |  |  |
Total Past Due |  | 10,933,000 | 1,204,000
Commercial [Member] | Real Estate [Member] | 90+ Days Past Due [Member] |  |  |
Bank's Loan portfolio aging analysis, segregated by class [Abstract] |  |  |
Total Past Due |  | 10,720,000 | 8,776,000
Commercial [Member] | Equipment Lease Financing [Member] |  |  |
Bank's Loan portfolio aging analysis, segregated by class [Abstract] |  |  |
Total Past Due |  | 0 | 0
Current |  | 962,000 | 1,740,000
Total Loans |  | 962,000 | 1,740,000
90+ and Accruing | [1] | 0 | 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 | 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 | 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 | 0
Commercial [Member] | Other [Member] |  |  |
Bank's Loan portfolio aging analysis, segregated by class [Abstract] |  |  |
Total Past Due |  | 4,552,000 | 2,218,000
Current |  | 385,496,000 | 374,980,000
Total Loans |  | 390,048,000 | 377,198,000
90+ and Accruing | [1] | 174,000 | 581,000
Commercial [Member] | Other [Member] | 30-59 Days Past Due [Member] |  |  |
Bank's Loan portfolio aging analysis, segregated by class [Abstract] |  |  |
Total Past Due |  | 988,000 | 1,057,000
Commercial [Member] | Other [Member] | 60-89 Days Past Due [Member] |  |  |
Bank's Loan portfolio aging analysis, segregated by class [Abstract] |  |  |
Total Past Due |  | 2,742,000 | 94,000
Commercial [Member] | Other [Member] | 90+ Days Past Due [Member] |  |  |
Bank's Loan portfolio aging analysis, segregated by class [Abstract] |  |  |
Total Past Due |  | 822,000 | 1,067,000
Residential [Member] | Construction [Member] |  |  |
Bank's Loan portfolio aging analysis, segregated by class [Abstract] |  |  |
Total Past Due |  | 596,000 | 610,000
Current |  | 56,421,000 | 56,550,000
Total Loans |  | 57,017,000 | 57,160,000
90+ and Accruing | [1] | 5,000 | 6,000
Residential [Member] | Construction [Member] | 30-59 Days Past Due [Member] |  |  |
Bank's Loan portfolio aging analysis, segregated by class [Abstract] |  |  |
Total Past Due |  | 290,000 | 144,000
Residential [Member] | Construction [Member] | 60-89 Days Past Due [Member] |  |  |
Bank's Loan portfolio aging analysis, segregated by class [Abstract] |  |  |
Total Past Due |  | 21,000 | 438,000
Residential [Member] | Construction [Member] | 90+ Days Past Due [Member] |  |  |
Bank's Loan portfolio aging analysis, segregated by class [Abstract] |  |  |
Total Past Due |  | 285,000 | 28,000
Residential [Member] | Real Estate [Member] |  |  |
Bank's Loan portfolio aging analysis, segregated by class [Abstract] |  |  |
Total Past Due |  | 13,675,000 | 14,524,000
Current |  | 708,898,000 | 707,893,000
Total Loans |  | 722,573,000 | 722,417,000
90+ and Accruing | [1] | 4,529,000 | 4,095,000
Residential [Member] | Real Estate [Member] | 30-59 Days Past Due [Member] |  |  |
Bank's Loan portfolio aging analysis, segregated by class [Abstract] |  |  |
Total Past Due |  | 1,104,000 | 1,272,000
Residential [Member] | Real Estate [Member] | 60-89 Days Past Due [Member] |  |  |
Bank's Loan portfolio aging analysis, segregated by class [Abstract] |  |  |
Total Past Due |  | 5,170,000 | 5,645,000
Residential [Member] | Real Estate [Member] | 90+ Days Past Due [Member] |  |  |
Bank's Loan portfolio aging analysis, segregated by class [Abstract] |  |  |
Total Past Due |  | 7,401,000 | 7,607,000
Residential [Member] | Home Equity [Member] |  |  |
Bank's Loan portfolio aging analysis, segregated by class [Abstract] |  |  |
Total Past Due |  | 1,609,000 | 1,704,000
Current |  | 108,222,000 | 104,595,000
Total Loans |  | 109,831,000 | 106,299,000
90+ and Accruing | [1] | 258,000 | 246,000
Residential [Member] | Home Equity [Member] | 30-59 Days Past Due [Member] |  |  |
Bank's Loan portfolio aging analysis, segregated by class [Abstract] |  |  |
Total Past Due |  | 709,000 | 898,000
Residential [Member] | Home Equity [Member] | 60-89 Days Past Due [Member] |  |  |
Bank's Loan portfolio aging analysis, segregated by class [Abstract] |  |  |
Total Past Due |  | 325,000 | 365,000
Residential [Member] | Home Equity [Member] | 90+ Days Past Due [Member] |  |  |
Bank's Loan portfolio aging analysis, segregated by class [Abstract] |  |  |
Total Past Due |  | 575,000 | 441,000
Consumer [Member] | Consumer Direct [Member] |  |  |
Bank's Loan portfolio aging analysis, segregated by class [Abstract] |  |  |
Total Past Due |  | 1,144,000 | 1,183,000
Current |  | 144,005,000 | 143,106,000
Total Loans |  | 145,149,000 | 144,289,000
90+ and Accruing | [1] | 40,000 | 74,000
Consumer [Member] | Consumer Direct [Member] | 30-59 Days Past Due [Member] |  |  |
Bank's Loan portfolio aging analysis, segregated by class [Abstract] |  |  |
Total Past Due |  | 926,000 | 918,000
Consumer [Member] | Consumer Direct [Member] | 60-89 Days Past Due [Member] |  |  |
Bank's Loan portfolio aging analysis, segregated by class [Abstract] |  |  |
Total Past Due |  | 178,000 | 191,000
Consumer [Member] | Consumer Direct [Member] | 90+ Days Past Due [Member] |  |  |
Bank's Loan portfolio aging analysis, segregated by class [Abstract] |  |  |
Total Past Due |  | 40,000 | 74,000
Consumer [Member] | Consumer Indirect [Member] |  |  |
Bank's Loan portfolio aging analysis, segregated by class [Abstract] |  |  |
Total Past Due |  | 4,582,000 | 6,197,000
Current |  | 503,506,000 | 527,530,000
Total Loans |  | 508,088,000 | 533,727,000
90+ and Accruing | [1] | 218,000 | 506,000
Consumer [Member] | Consumer Indirect [Member] | 30-59 Days Past Due [Member] |  |  |
Bank's Loan portfolio aging analysis, segregated by class [Abstract] |  |  |
Total Past Due |  | 3,514,000 | 4,715,000
Consumer [Member] | Consumer Indirect [Member] | 60-89 Days Past Due [Member] |  |  |
Bank's Loan portfolio aging analysis, segregated by class [Abstract] |  |  |
Total Past Due |  | 850,000 | 975,000
Consumer [Member] | Consumer Indirect [Member] | 90+ Days Past Due [Member] |  |  |
Bank's Loan portfolio aging analysis, segregated by class [Abstract] |  |  |
Total Past Due |  | $ 218,000 | $ 507,000
[1] | 90+ and Accruing are also included in 90+ Days Past Due column.

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