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Loans, Nonaccrual Loans Segregated by Class of Loans and Loan Portfolio Aging Analysis, Segregated by Class (Details) - USD ($) $ in Thousands | 6 Months Ended |
--- | --- | ---
Jun. 30, 2017 | Dec. 31, 2016
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Nonaccrual loans segregated by class of loans |  | $ 19,651 | $ 16,623
Bank's Loan portfolio aging analysis, segregated by class [Abstract] |  |  |
Total Past Due |  | 42,015 | 42,089
Current |  | 3,045,327 | 2,896,282
Total Loans |  | 3,087,342 | 2,938,371
90+ and Accruing | [1] | 8,362 | 10,847
Minimum threshold amount of loans requiring performance bond |  | 500 |
30-59 Days Past Due [Member] |  |  |
Bank's Loan portfolio aging analysis, segregated by class [Abstract] |  |  |
Total Past Due |  | 9,607 | 10,242
60-89 Days Past Due [Member] |  |  |
Bank's Loan portfolio aging analysis, segregated by class [Abstract] |  |  |
Total Past Due |  | 9,436 | 7,324
90+ Days Past Due [Member] |  |  |
Bank's Loan portfolio aging analysis, segregated by class [Abstract] |  |  |
Total Past Due |  | $ 22,972 | 24,523
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 |  | $ 1,608,359 | 1,508,097
Commercial [Member] | Construction [Member] |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Nonaccrual loans segregated by class of loans |  | 1,328 | 1,912
Bank's Loan portfolio aging analysis, segregated by class [Abstract] |  |  |
Total Past Due |  | 1,352 | 1,962
Current |  | 70,702 | 65,036
Total Loans |  | 72,054 | 66,998
90+ and Accruing | [1] | 24 | 28
Commercial [Member] | Construction [Member] | 30-59 Days Past Due [Member] |  |  |
Bank's Loan portfolio aging analysis, segregated by class [Abstract] |  |  |
Total Past Due |  | 0 | 22
Commercial [Member] | Construction [Member] | 60-89 Days Past Due [Member] |  |  |
Bank's Loan portfolio aging analysis, segregated by class [Abstract] |  |  |
Total Past Due |  | 0 | 0
Commercial [Member] | Construction [Member] | 90+ Days Past Due [Member] |  |  |
Bank's Loan portfolio aging analysis, segregated by class [Abstract] |  |  |
Total Past Due |  | 1,352 | 1,940
Commercial [Member] | Real Estate [Member] |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Nonaccrual loans segregated by class of loans |  | 8,713 | 6,326
Bank's Loan portfolio aging analysis, segregated by class [Abstract] |  |  |
Total Past Due |  | 13,569 | 11,358
Current |  | 1,165,660 | 1,074,070
Total Loans |  | 1,179,229 | 1,085,428
90+ and Accruing | [1] | 2,171 | 3,015
Commercial [Member] | Real Estate [Member] | 30-59 Days Past Due [Member] |  |  |
Bank's Loan portfolio aging analysis, segregated by class [Abstract] |  |  |
Total Past Due |  | 2,272 | 2,033
Commercial [Member] | Real Estate [Member] | 60-89 Days Past Due [Member] |  |  |
Bank's Loan portfolio aging analysis, segregated by class [Abstract] |  |  |
Total Past Due |  | 3,540 | 478
Commercial [Member] | Real Estate [Member] | 90+ Days Past Due [Member] |  |  |
Bank's Loan portfolio aging analysis, segregated by class [Abstract] |  |  |
Total Past Due |  | 7,757 | 8,847
Commercial [Member] | Equipment Lease Financing [Member] |  |  |
Bank's Loan portfolio aging analysis, segregated by class [Abstract] |  |  |
Total Past Due |  | 130 | 0
Current |  | 4,773 | 5,512
Total Loans |  | 4,903 | 5,512
90+ and Accruing | [1] | 130 | 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 |  | 130 | 0
Commercial [Member] | Other [Member] |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Nonaccrual loans segregated by class of loans |  | 1,404 | 1,559
Bank's Loan portfolio aging analysis, segregated by class [Abstract] |  |  |
Total Past Due |  | 2,056 | 2,354
Current |  | 350,117 | 347,805
Total Loans |  | 352,173 | 350,159
90+ and Accruing | [1] | 235 | 141
Commercial [Member] | Other [Member] | 30-59 Days Past Due [Member] |  |  |
Bank's Loan portfolio aging analysis, segregated by class [Abstract] |  |  |
Total Past Due |  | 513 | 997
Commercial [Member] | Other [Member] | 60-89 Days Past Due [Member] |  |  |
Bank's Loan portfolio aging analysis, segregated by class [Abstract] |  |  |
Total Past Due |  | 420 | 122
Commercial [Member] | Other [Member] | 90+ Days Past Due [Member] |  |  |
Bank's Loan portfolio aging analysis, segregated by class [Abstract] |  |  |
Total Past Due |  | 1,123 | 1,235
Residential [Member] | Construction [Member] |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Nonaccrual loans segregated by class of loans |  | 189 | 11
Bank's Loan portfolio aging analysis, segregated by class [Abstract] |  |  |
Total Past Due |  | 1,824 | 901
Current |  | 56,742 | 57,065
Total Loans |  | 58,566 | 57,966
90+ and Accruing | [1] | 205 | 152
Residential [Member] | Construction [Member] | 30-59 Days Past Due [Member] |  |  |
Bank's Loan portfolio aging analysis, segregated by class [Abstract] |  |  |
Total Past Due |  | 1,254 | 707
Residential [Member] | Construction [Member] | 60-89 Days Past Due [Member] |  |  |
Bank's Loan portfolio aging analysis, segregated by class [Abstract] |  |  |
Total Past Due |  | 177 | 42
Residential [Member] | Construction [Member] | 90+ Days Past Due [Member] |  |  |
Bank's Loan portfolio aging analysis, segregated by class [Abstract] |  |  |
Total Past Due |  | 393 | 152
Residential [Member] | Real Estate [Member] |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Nonaccrual loans segregated by class of loans |  | 7,461 | 6,260
Bank's Loan portfolio aging analysis, segregated by class [Abstract] |  |  |
Total Past Due |  | 16,333 | 17,466
Current |  | 692,134 | 685,503
Total Loans |  | 708,467 | 702,969
90+ and Accruing | [1] | 5,042 | 6,295
Residential [Member] | Real Estate [Member] | 30-59 Days Past Due [Member] |  |  |
Bank's Loan portfolio aging analysis, segregated by class [Abstract] |  |  |
Total Past Due |  | 950 | 1,493
Residential [Member] | Real Estate [Member] | 60-89 Days Past Due [Member] |  |  |
Bank's Loan portfolio aging analysis, segregated by class [Abstract] |  |  |
Total Past Due |  | 4,113 | 5,278
Residential [Member] | Real Estate [Member] | 90+ Days Past Due [Member] |  |  |
Bank's Loan portfolio aging analysis, segregated by class [Abstract] |  |  |
Total Past Due |  | 11,270 | 10,695
Residential [Member] | Home Equity [Member] |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Nonaccrual loans segregated by class of loans |  | 556 | 555
Bank's Loan portfolio aging analysis, segregated by class [Abstract] |  |  |
Total Past Due |  | 1,957 | 2,022
Current |  | 91,764 | 89,489
Total Loans |  | 93,721 | 91,511
90+ and Accruing | [1] | 300 | 467
Residential [Member] | Home Equity [Member] | 30-59 Days Past Due [Member] |  |  |
Bank's Loan portfolio aging analysis, segregated by class [Abstract] |  |  |
Total Past Due |  | 1,004 | 829
Residential [Member] | Home Equity [Member] | 60-89 Days Past Due [Member] |  |  |
Bank's Loan portfolio aging analysis, segregated by class [Abstract] |  |  |
Total Past Due |  | 261 | 288
Residential [Member] | Home Equity [Member] | 90+ Days Past Due [Member] |  |  |
Bank's Loan portfolio aging analysis, segregated by class [Abstract] |  |  |
Total Past Due |  | 692 | 905
Consumer [Member] | Consumer Direct [Member] |  |  |
Bank's Loan portfolio aging analysis, segregated by class [Abstract] |  |  |
Total Past Due |  | 954 | 1,206
Current |  | 134,274 | 131,887
Total Loans |  | 135,228 | 133,093
90+ and Accruing | [1] | 34 | 68
Consumer [Member] | Consumer Direct [Member] | 30-59 Days Past Due [Member] |  |  |
Bank's Loan portfolio aging analysis, segregated by class [Abstract] |  |  |
Total Past Due |  | 788 | 873
Consumer [Member] | Consumer Direct [Member] | 60-89 Days Past Due [Member] |  |  |
Bank's Loan portfolio aging analysis, segregated by class [Abstract] |  |  |
Total Past Due |  | 132 | 265
Consumer [Member] | Consumer Direct [Member] | 90+ Days Past Due [Member] |  |  |
Bank's Loan portfolio aging analysis, segregated by class [Abstract] |  |  |
Total Past Due |  | 34 | 68
Consumer [Member] | Consumer Indirect [Member] |  |  |
Bank's Loan portfolio aging analysis, segregated by class [Abstract] |  |  |
Total Past Due |  | 3,840 | 4,820
Current |  | 479,161 | 439,915
Total Loans |  | 483,001 | 444,735
90+ and Accruing | [1] | 221 | 681
Consumer [Member] | Consumer Indirect [Member] | 30-59 Days Past Due [Member] |  |  |
Bank's Loan portfolio aging analysis, segregated by class [Abstract] |  |  |
Total Past Due |  | 2,826 | 3,288
Consumer [Member] | Consumer Indirect [Member] | 60-89 Days Past Due [Member] |  |  |
Bank's Loan portfolio aging analysis, segregated by class [Abstract] |  |  |
Total Past Due |  | 793 | 851
Consumer [Member] | Consumer Indirect [Member] | 90+ Days Past Due [Member] |  |  |
Bank's Loan portfolio aging analysis, segregated by class [Abstract] |  |  |
Total Past Due |  | $ 221 | $ 681
[1] | 90+ and Accruing are also included in 90+ Days Past Due column.

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