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Loans - Past-due Status of Loans by Class (Details) - USD ($) $ in Thousands | Mar. 31, 2016 | Dec. 31, 2015 | Mar. 31, 2015
--- | --- | --- | ---
Schedule of Financing Receivables [Line Items] |  |  |
All Past Due | $ 8,247 | $ 8,287 | $ 11,958
Current | 996,695 | 980,351 | 927,211
Total | 1,004,942 | 988,638 | 939,169
90 Days & Accruing | 452 | 136 | 184
Commercial real estate |  |  |
Schedule of Financing Receivables [Line Items] |  |  |
All Past Due | 1,255 | 884 | 798
Current | 278,428 | 268,578 | 241,223
Total | 279,683 | 269,462 | 242,021
90 Days & Accruing | 0 | 0 | 0
Commercial construction |  |  |
Schedule of Financing Receivables [Line Items] |  |  |
All Past Due | 150 | 273 | 229
Current | 19,988 | 24,608 | 34,454
Total | 20,138 | 24,881 | 34,683
90 Days & Accruing | 0 | 0 | 0
Commercial other |  |  |
Schedule of Financing Receivables [Line Items] |  |  |
All Past Due | 433 | 328 | 994
Current | 133,196 | 128,013 | 114,461
Total | 133,629 | 128,341 | 115,455
90 Days & Accruing | 0 | 25 | 0
Municipal |  |  |
Schedule of Financing Receivables [Line Items] |  |  |
All Past Due | 0 | 0 | 0
Current | 19,042 | 19,751 | 26,277
Total | 19,042 | 19,751 | 26,277
90 Days & Accruing | 0 | 0 | 0
Residential term |  |  |
Schedule of Financing Receivables [Line Items] |  |  |
All Past Due | 4,783 | 5,187 | 8,243
Current | 400,712 | 397,843 | 375,626
Total | 405,495 | 403,030 | 383,869
90 Days & Accruing | 411 | 100 | 100
Residential construction |  |  |
Schedule of Financing Receivables [Line Items] |  |  |
All Past Due | 0 | 368 | 0
Current | 11,754 | 8,083 | 13,036
Total | 11,754 | 8,451 | 13,036
90 Days & Accruing | 0 | 0 | 0
Home equity line of credit |  |  |
Schedule of Financing Receivables [Line Items] |  |  |
All Past Due | 1,383 | 1,108 | 1,457
Current | 108,866 | 109,094 | 102,643
Total | 110,249 | 110,202 | 104,100
90 Days & Accruing | 0 | 0 | 0
Consumer |  |  |
Schedule of Financing Receivables [Line Items] |  |  |
All Past Due | 243 | 139 | 237
Current | 24,709 | 24,381 | 19,491
Total | 24,952 | 24,520 | 19,728
90 Days & Accruing | 41 | 11 | 84
30-59 Days Past Due |  |  |
Schedule of Financing Receivables [Line Items] |  |  |
All Past Due | 3,966 | 2,122 | 5,219
30-59 Days Past Due | Commercial real estate |  |  |
Schedule of Financing Receivables [Line Items] |  |  |
All Past Due | 428 | 603 | 491
30-59 Days Past Due | Commercial construction |  |  |
Schedule of Financing Receivables [Line Items] |  |  |
All Past Due | 0 | 35 | 21
30-59 Days Past Due | Commercial other |  |  |
Schedule of Financing Receivables [Line Items] |  |  |
All Past Due | 323 | 303 | 135
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 | 2,321 | 450 | 3,948
30-59 Days Past Due | Residential construction |  |  |
Schedule of Financing Receivables [Line Items] |  |  |
All Past Due | 0 | 368 | 0
30-59 Days Past Due | Home equity line of credit |  |  |
Schedule of Financing Receivables [Line Items] |  |  |
All Past Due | 718 | 261 | 488
30-59 Days Past Due | Consumer |  |  |
Schedule of Financing Receivables [Line Items] |  |  |
All Past Due | 176 | 102 | 136
60-89 Days Past Due |  |  |
Schedule of Financing Receivables [Line Items] |  |  |
All Past Due | 696 | 2,379 | 1,561
60-89 Days Past Due | Commercial real estate |  |  |
Schedule of Financing Receivables [Line Items] |  |  |
All Past Due | 376 | 0 | 0
60-89 Days Past Due | Commercial construction |  |  |
Schedule of Financing Receivables [Line Items] |  |  |
All Past Due | 0 | 0 | 0
60-89 Days Past Due | Commercial other |  |  |
Schedule of Financing Receivables [Line Items] |  |  |
All Past Due | 110 | 0 | 2
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 | 62 | 2,098 | 1,438
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 | 122 | 255 | 105
60-89 Days Past Due | Consumer |  |  |
Schedule of Financing Receivables [Line Items] |  |  |
All Past Due | 26 | 26 | 16
Equal to Greater than 90 Days Past Due |  |  |
Schedule of Financing Receivables [Line Items] |  |  |
All Past Due | 3,585 | 3,786 | 5,178
Equal to Greater than 90 Days Past Due | Commercial real estate |  |  |
Schedule of Financing Receivables [Line Items] |  |  |
All Past Due | 451 | 281 | 307
Equal to Greater than 90 Days Past Due | Commercial construction |  |  |
Schedule of Financing Receivables [Line Items] |  |  |
All Past Due | 150 | 238 | 208
Equal to Greater than 90 Days Past Due | Commercial other |  |  |
Schedule of Financing Receivables [Line Items] |  |  |
All Past Due | 0 | 25 | 857
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 | 2,400 | 2,639 | 2,857
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 | 543 | 592 | 864
Equal to Greater than 90 Days Past Due | Consumer |  |  |
Schedule of Financing Receivables [Line Items] |  |  |
All Past Due | $ 41 | $ 11 | $ 85

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