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Loans - Past-due Status of Loans by Class (Details) - USD ($) $ in Thousands | Sep. 30, 2015 | Dec. 31, 2014 | Sep. 30, 2014
--- | --- | --- | ---
Schedule of Financing Receivables [Line Items] |  |  |
All Past Due | $ 9,758 | $ 11,863 | $ 10,620
Current | 953,393 | 905,701 | 897,495
Total | 963,151 | 917,564 | 908,115
90 Days & Accruing | 109 | 181 | 452
Commercial real estate |  |  |
Schedule of Financing Receivables [Line Items] |  |  |
All Past Due | 1,056 | 860 | 1,336
Current | 267,685 | 241,451 | 242,600
Total | 268,741 | 242,311 | 243,936
90 Days & Accruing | 0 | 0 | 0
Commercial construction |  |  |
Schedule of Financing Receivables [Line Items] |  |  |
All Past Due | 239 | 249 | 208
Current | 23,385 | 30,683 | 26,746
Total | 23,624 | 30,932 | 26,954
90 Days & Accruing | 0 | 0 | 0
Commercial other |  |  |
Schedule of Financing Receivables [Line Items] |  |  |
All Past Due | 10 | 1,193 | 619
Current | 119,087 | 103,338 | 97,032
Total | 119,097 | 104,531 | 97,651
90 Days & Accruing | 0 | 0 | 0
Municipal |  |  |
Schedule of Financing Receivables [Line Items] |  |  |
All Past Due | 0 | 0 | 0
Current | 21,377 | 20,424 | 20,722
Total | 21,377 | 20,424 | 20,722
90 Days & Accruing | 0 | 0 | 0
Residential term |  |  |
Schedule of Financing Receivables [Line Items] |  |  |
All Past Due | 6,950 | 7,003 | 6,910
Current | 378,195 | 377,029 | 379,858
Total | 385,145 | 384,032 | 386,768
90 Days & Accruing | 0 | 101 | 380
Residential construction |  |  |
Schedule of Financing Receivables [Line Items] |  |  |
All Past Due | 0 | 0 | 0
Current | 12,029 | 12,160 | 12,253
Total | 12,029 | 12,160 | 12,253
90 Days & Accruing | 0 | 0 | 0
Home equity line of credit |  |  |
Schedule of Financing Receivables [Line Items] |  |  |
All Past Due | 1,195 | 2,122 | 1,359
Current | 108,195 | 101,399 | 99,735
Total | 109,390 | 103,521 | 101,094
90 Days & Accruing | 0 | 0 | 0
Consumer |  |  |
Schedule of Financing Receivables [Line Items] |  |  |
All Past Due | 308 | 436 | 188
Current | 23,440 | 19,217 | 18,549
Total | 23,748 | 19,653 | 18,737
90 Days & Accruing | 109 | 80 | 72
30-59 Days Past Due |  |  |
Schedule of Financing Receivables [Line Items] |  |  |
All Past Due | 1,908 | 2,746 | 1,486
30-59 Days Past Due | Commercial real estate |  |  |
Schedule of Financing Receivables [Line Items] |  |  |
All Past Due | 193 | 346 | 0
30-59 Days Past Due | Commercial construction |  |  |
Schedule of Financing Receivables [Line Items] |  |  |
All Past Due | 0 | 0 | 0
30-59 Days Past Due | Commercial other |  |  |
Schedule of Financing Receivables [Line Items] |  |  |
All Past Due | 10 | 336 | 109
30-59 Days Past Due | Municipal |  |  |
Schedule of Financing Receivables [Line Items] |  |  |
All Past Due | 0 | 0 | 0
30-59 Days Past Due | Residential term |  |  |
Schedule of Financing Receivables [Line Items] |  |  |
All Past Due | 982 | 1,140 | 725
30-59 Days Past Due | Residential construction |  |  |
Schedule of Financing Receivables [Line Items] |  |  |
All Past Due | 0 | 0 | 0
30-59 Days Past Due | Home equity line of credit |  |  |
Schedule of Financing Receivables [Line Items] |  |  |
All Past Due | 577 | 621 | 603
30-59 Days Past Due | Consumer |  |  |
Schedule of Financing Receivables [Line Items] |  |  |
All Past Due | 146 | 303 | 49
60-89 Days Past Due |  |  |
Schedule of Financing Receivables [Line Items] |  |  |
All Past Due | 3,958 | 3,631 | 2,642
60-89 Days Past Due | Commercial real estate |  |  |
Schedule of Financing Receivables [Line Items] |  |  |
All Past Due | 863 | 107 | 116
60-89 Days Past Due | Commercial construction |  |  |
Schedule of Financing Receivables [Line Items] |  |  |
All Past Due | 31 | 41 | 0
60-89 Days Past Due | Commercial other |  |  |
Schedule of Financing Receivables [Line Items] |  |  |
All Past Due | 0 | 543 | 34
60-89 Days Past Due | Municipal |  |  |
Schedule of Financing Receivables [Line Items] |  |  |
All Past Due | 0 | 0 | 0
60-89 Days Past Due | Residential term |  |  |
Schedule of Financing Receivables [Line Items] |  |  |
All Past Due | 3,012 | 2,118 | 2,317
60-89 Days Past Due | Residential construction |  |  |
Schedule of Financing Receivables [Line Items] |  |  |
All Past Due | 0 | 0 | 0
60-89 Days Past Due | Home equity line of credit |  |  |
Schedule of Financing Receivables [Line Items] |  |  |
All Past Due | 0 | 769 | 107
60-89 Days Past Due | Consumer |  |  |
Schedule of Financing Receivables [Line Items] |  |  |
All Past Due | 52 | 53 | 68
Equal to Greater than 90 Days Past Due |  |  |
Schedule of Financing Receivables [Line Items] |  |  |
All Past Due | 3,892 | 5,486 | 6,492
Equal to Greater than 90 Days Past Due | Commercial real estate |  |  |
Schedule of Financing Receivables [Line Items] |  |  |
All Past Due | 0 | 407 | 1,220
Equal to Greater than 90 Days Past Due | Commercial construction |  |  |
Schedule of Financing Receivables [Line Items] |  |  |
All Past Due | 208 | 208 | 208
Equal to Greater than 90 Days Past Due | Commercial other |  |  |
Schedule of Financing Receivables [Line Items] |  |  |
All Past Due | 0 | 314 | 476
Equal to Greater than 90 Days Past Due | Municipal |  |  |
Schedule of Financing Receivables [Line Items] |  |  |
All Past Due | 0 | 0 | 0
Equal to Greater than 90 Days Past Due | Residential term |  |  |
Schedule of Financing Receivables [Line Items] |  |  |
All Past Due | 2,956 | 3,745 | 3,868
Equal to Greater than 90 Days Past Due | Residential construction |  |  |
Schedule of Financing Receivables [Line Items] |  |  |
All Past Due | 0 | 0 | 0
Equal to Greater than 90 Days Past Due | Home equity line of credit |  |  |
Schedule of Financing Receivables [Line Items] |  |  |
All Past Due | 618 | 732 | 649
Equal to Greater than 90 Days Past Due | Consumer |  |  |
Schedule of Financing Receivables [Line Items] |  |  |
All Past Due | $ 110 | $ 80 | $ 71

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