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Imparied Loan Information by Portfolio (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Impaired loans by loan portfolio |  |  |
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment | $ 5,214 | $ 1,930 | $ 2,416
Related Allowance | 5,214 | 1,930 | 2,416
Recorded Investment | 77,297 | 51,410 | 58,035
Unpaid Principal Balance | 81,071 | 54,822 | 61,887
Average Recorded Investment | 77,209 | 51,678 | 62,202
Interest Income Recognized | 2,700 | 1,993 | 3,242
Commercial and Industrial [Member] |  |  |
Impaired loans by loan portfolio |  |  |
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment | 3,661 | 183 | 412
Commercial Real Estate [Member] |  |  |
Impaired loans by loan portfolio |  |  |
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment | 196 | 204 | 197
Construction Loans [Member] |  |  |
Impaired loans by loan portfolio |  |  |
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment | 0 | 0 | 0
Small Business [Member] |  |  |
Impaired loans by loan portfolio |  |  |
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment | 8 | 4 | 7
Residential Real Estate [Member] |  |  |
Impaired loans by loan portfolio |  |  |
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment | 1,086 | 1,278 | 1,500
Home Equity [Member] |  |  |
Impaired loans by loan portfolio |  |  |
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment | 242 | 238 | 262
Consumer Portfolio Segment [Member] |  |  |
Impaired loans by loan portfolio |  |  |
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment | 21 | 23 | 38
With No Related Allowance Recorded [Member] |  |  |
Impaired loans by loan portfolio |  |  |
Recorded Investment | 49,745 | 24,403 | 26,936
Unpaid Principal Balance | 52,377 | 26,276 | 28,535
Average Recorded Investment | 48,814 | 24,774 | 29,464
Interest Income Recognized | 1,764 | 835 | 1,665
Related Allowance | 0 | 0 | 0
With No Related Allowance Recorded [Member] | Commercial and Industrial [Member] |  |  |
Impaired loans by loan portfolio |  |  |
Recorded Investment | 28,776 | 2,613 | 3,005
Unpaid Principal Balance | 29,772 | 3,002 | 3,278
Average Recorded Investment | 26,472 | 3,024 | 4,557
Interest Income Recognized | 927 | 71 | 258
Related Allowance | 0 | 0 | 0
With No Related Allowance Recorded [Member] | Commercial Real Estate [Member] |  |  |
Impaired loans by loan portfolio |  |  |
Recorded Investment | 11,628 | 12,008 | 15,982
Unpaid Principal Balance | 12,891 | 13,128 | 17,164
Average Recorded Investment | 12,744 | 11,676 | 16,703
Interest Income Recognized | 437 | 375 | 1,025
Related Allowance | 0 | 0 | 0
With No Related Allowance Recorded [Member] | Construction Loans [Member] |  |  |
Impaired loans by loan portfolio |  |  |
Recorded Investment |  | 304 | 311
Unpaid Principal Balance |  | 305 | 311
Average Recorded Investment |  | 308 | 311
Interest Income Recognized |  | 0 | 13
Related Allowance |  | 0 | 0
With No Related Allowance Recorded [Member] | Small Business [Member] |  |  |
Impaired loans by loan portfolio |  |  |
Recorded Investment | 494 | 527 | 692
Unpaid Principal Balance | 569 | 618 | 718
Average Recorded Investment | 534 | 584 | 772
Interest Income Recognized | 20 | 22 | 45
Related Allowance | 0 | 0 | 0
With No Related Allowance Recorded [Member] | Residential Real Estate [Member] |  |  |
Impaired loans by loan portfolio |  |  |
Recorded Investment | 4,216 | 3,874 | 2,439
Unpaid Principal Balance | 4,427 | 4,033 | 2,502
Average Recorded Investment | 4,302 | 3,958 | 2,493
Interest Income Recognized | 185 | 157 | 102
Related Allowance | 0 | 0 | 0
With No Related Allowance Recorded [Member] | Home Equity [Member] |  |  |
Impaired loans by loan portfolio |  |  |
Recorded Investment | 4,485 | 4,893 | 4,169
Unpaid Principal Balance | 4,572 | 5,005 | 4,221
Average Recorded Investment | 4,602 | 5,023 | 4,264
Interest Income Recognized | 184 | 195 | 198
Related Allowance | 0 | 0 | 0
With No Related Allowance Recorded [Member] | Consumer Portfolio Segment [Member] |  |  |
Impaired loans by loan portfolio |  |  |
Recorded Investment | 146 | 184 | 338
Unpaid Principal Balance | 146 | 185 | 341
Average Recorded Investment | 160 | 201 | 364
Interest Income Recognized | 11 | 15 | 24
Related Allowance | 0 | 0 | 0
With Allowance Recorded [Member] |  |  |
Impaired loans by loan portfolio |  |  |
Recorded Investment | 27,552 | 27,007 | 31,099
Unpaid Principal Balance | 28,694 | 28,546 | 33,352
Average Recorded Investment | 28,395 | 26,904 | 32,738
Interest Income Recognized | 936 | 1,158 | 1,577
With Allowance Recorded [Member] | Commercial and Industrial [Member] |  |  |
Impaired loans by loan portfolio |  |  |
Recorded Investment | 10,402 | 2,534 | 1,649
Unpaid Principal Balance | 10,440 | 2,648 | 1,859
Average Recorded Investment | 10,760 | 2,848 | 2,032
Interest Income Recognized | 325 | 48 | 98
With Allowance Recorded [Member] | Commercial Real Estate [Member] |  |  |
Impaired loans by loan portfolio |  |  |
Recorded Investment | 5,185 | 10,978 | 14,747
Unpaid Principal Balance | 5,533 | 11,047 | 15,514
Average Recorded Investment | 5,491 | 10,789 | 15,650
Interest Income Recognized | 200 | 592 | 842
With Allowance Recorded [Member] | Small Business [Member] |  |  |
Impaired loans by loan portfolio |  |  |
Recorded Investment | 377 | 494 | 396
Unpaid Principal Balance | 392 | 523 | 458
Average Recorded Investment | 408 | 535 | 456
Interest Income Recognized | 21 | 30 | 32
With Allowance Recorded [Member] | Residential Real Estate [Member] |  |  |
Impaired loans by loan portfolio |  |  |
Recorded Investment | 9,959 | 11,531 | 12,616
Unpaid Principal Balance | 10,530 | 12,652 | 13,727
Average Recorded Investment | 10,065 | 11,669 | 12,817
Interest Income Recognized | 332 | 460 | 537
With Allowance Recorded [Member] | Home Equity [Member] |  |  |
Impaired loans by loan portfolio |  |  |
Recorded Investment | 1,378 | 1,096 | 1,161
Unpaid Principal Balance | 1,547 | 1,287 | 1,264
Average Recorded Investment | 1,403 | 655 | 1,203
Interest Income Recognized | 50 | 14 | 46
With Allowance Recorded [Member] | Consumer Portfolio Segment [Member] |  |  |
Impaired loans by loan portfolio |  |  |
Recorded Investment | 251 | 374 | 530
Unpaid Principal Balance | 252 | 389 | 530
Average Recorded Investment | 268 | 408 | 580
Interest Income Recognized | $ 8 | $ 14 | $ 22

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