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Impaired Loan Information by Portfolio (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Impaired loans by loan portfolio |  |  |
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment | $ 980 | $ 1,079 | $ 1,342
Related Allowance | 980 | 1,079 | 1,342
Recorded Investment | 49,628 | 59,060 | 72,801
Unpaid Principal Balance | 68,140 | 68,514 | 79,276
Average Recorded Investment | 59,682 | 63,522 | 76,180
Interest Income Recognized | 1,537 | 1,554 | 2,026
Commercial and Industrial [Member] |  |  |
Impaired loans by loan portfolio |  |  |
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment | 126 | 7 | 10
Commercial Real Estate [Member] |  |  |
Impaired loans by loan portfolio |  |  |
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment | 48 | 37 | 42
Construction Loans [Member] |  |  |
Impaired loans by loan portfolio |  |  |
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment | 0 | 0 |
Small Business [Member] |  |  |
Impaired loans by loan portfolio |  |  |
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment | 8 | 1 | 1
Residential Real Estate [Member] |  |  |
Impaired loans by loan portfolio |  |  |
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment | 637 | 862 | 1,007
Home Equity [Member] |  |  |
Impaired loans by loan portfolio |  |  |
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment | 156 | 164 | 265
Consumer Portfolio Segment [Member] |  |  |
Impaired loans by loan portfolio |  |  |
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment | 5 | 8 | 17
With No Related Allowance Recorded [Member] |  |  |
Impaired loans by loan portfolio |  |  |
Recorded Investment | 39,242 | 47,900 | 57,373
Unpaid Principal Balance | 56,605 | 56,125 | 62,867
Average Recorded Investment | 49,077 | 51,970 | 60,380
Interest Income Recognized | 1,090 | 1,111 | 1,449
Related Allowance | 0 | 0 | 0
With No Related Allowance Recorded [Member] | Commercial and Industrial [Member] |  |  |
Impaired loans by loan portfolio |  |  |
Recorded Investment | 23,786 | 28,459 | 34,267
Unpaid Principal Balance | 34,970 | 35,913 | 38,329
Average Recorded Investment | 27,056 | 31,117 | 36,631
Interest Income Recognized | 136 | 142 | 446
Related Allowance | 0 | 0 | 0
With No Related Allowance Recorded [Member] | Commercial Real Estate [Member] |  |  |
Impaired loans by loan portfolio |  |  |
Recorded Investment | 6,213 | 9,552 | 13,245
Unpaid Principal Balance | 12,101 | 9,832 | 14,374
Average Recorded Investment | 12,595 | 10,561 | 13,683
Interest Income Recognized | 523 | 519 | 559
Related Allowance | 0 | 0 | 0
With No Related Allowance Recorded [Member] | Small Business [Member] |  |  |
Impaired loans by loan portfolio |  |  |
Recorded Investment | 469 | 358 | 556
Unpaid Principal Balance | 484 | 439 | 619
Average Recorded Investment | 471 | 401 | 569
Interest Income Recognized | 22 | 14 | 21
Related Allowance | 0 | 0 | 0
With No Related Allowance Recorded [Member] | Residential Real Estate [Member] |  |  |
Impaired loans by loan portfolio |  |  |
Recorded Investment | 4,976 | 4,518 | 4,264
Unpaid Principal Balance | 5,123 | 4,686 | 4,397
Average Recorded Investment | 5,045 | 4,597 | 4,332
Interest Income Recognized | 222 | 212 | 218
Related Allowance | 0 | 0 | 0
With No Related Allowance Recorded [Member] | Home Equity [Member] |  |  |
Impaired loans by loan portfolio |  |  |
Recorded Investment | 3,764 | 4,957 | 4,950
Unpaid Principal Balance | 3,893 | 5,199 | 5,056
Average Recorded Investment | 3,869 | 5,230 | 5,063
Interest Income Recognized | 184 | 220 | 198
Related Allowance | 0 | 0 | 0
With No Related Allowance Recorded [Member] | Consumer Portfolio Segment [Member] |  |  |
Impaired loans by loan portfolio |  |  |
Recorded Investment | 34 | 56 | 91
Unpaid Principal Balance | 34 | 56 | 92
Average Recorded Investment | 41 | 64 | 102
Interest Income Recognized | 3 | 4 | 7
Related Allowance | 0 | 0 | 0
With Allowance Recorded [Member] |  |  |
Impaired loans by loan portfolio |  |  |
Recorded Investment | 10,386 | 11,160 | 15,428
Unpaid Principal Balance | 11,535 | 12,389 | 16,409
Average Recorded Investment | 10,605 | 11,552 | 15,800
Interest Income Recognized | 447 | 443 | 577
With Allowance Recorded [Member] | Commercial and Industrial [Member] |  |  |
Impaired loans by loan portfolio |  |  |
Recorded Investment | 670 | 370 | 376
Unpaid Principal Balance | 670 | 370 | 376
Average Recorded Investment | 718 | 385 | 391
Interest Income Recognized | 29 | 19 | 19
With Allowance Recorded [Member] | Commercial Real Estate [Member] |  |  |
Impaired loans by loan portfolio |  |  |
Recorded Investment | 2,124 | 1,287 | 3,393
Unpaid Principal Balance | 2,124 | 1,287 | 3,399
Average Recorded Investment | 2,176 | 1,311 | 3,447
Interest Income Recognized | 122 | 74 | 198
With Allowance Recorded [Member] | Small Business [Member] |  |  |
Impaired loans by loan portfolio |  |  |
Recorded Investment | 68 | 183 | 147
Unpaid Principal Balance | 105 | 223 | 153
Average Recorded Investment | 74 | 225 | 238
Interest Income Recognized | 2 | 13 | 14
With Allowance Recorded [Member] | Residential Real Estate [Member] |  |  |
Impaired loans by loan portfolio |  |  |
Recorded Investment | 6,252 | 8,188 | 9,420
Unpaid Principal Balance | 7,163 | 9,217 | 10,154
Average Recorded Investment | 6,326 | 8,459 | 9,575
Interest Income Recognized | 239 | 289 | 284
With Allowance Recorded [Member] | Home Equity [Member] |  |  |
Impaired loans by loan portfolio |  |  |
Recorded Investment | 1,184 | 991 | 1,876
Unpaid Principal Balance | 1,382 | 1,149 | 2,110
Average Recorded Investment | 1,214 | 1,018 | 1,916
Interest Income Recognized | 52 | 43 | 55
With Allowance Recorded [Member] | Consumer Portfolio Segment [Member] |  |  |
Impaired loans by loan portfolio |  |  |
Recorded Investment | 88 | 141 | 216
Unpaid Principal Balance | 91 | 143 | 217
Average Recorded Investment | 97 | 154 | 233
Interest Income Recognized | $ 3 | $ 5 | $ 7

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