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Loans - Impaired Loans by Class (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Jun. 30, 2016 | Jun. 30, 2015 | Jun. 30, 2016 | Jun. 30, 2015 | Dec. 31, 2015
Schedule of Financing Receivables [Line Items] |  |  |  |  |
Recorded Investment | $ 28,193 | $ 32,748 | $ 28,193 | $ 32,748 | $ 29,531
Unpaid Principal Balance | 30,087 | 35,248 | 30,087 | 35,248 | 31,906
Related Allowance | 1,029 | 1,307 | 1,029 | 1,307 | 754
Average Recorded Investment | 28,080 | 34,025 | 28,526 | 34,573 | 32,698
Recognized Interest Income | 282 | 335 | 557 | 637 | 1,220
With No Related Allowance |  |  |  |  |
Schedule of Financing Receivables [Line Items] |  |  |  |  |
Recorded Investment | 19,491 | 22,010 | 19,491 | 22,010 | 20,889
Unpaid Principal Balance | 21,208 | 24,106 | 21,208 | 24,106 | 22,947
Related Allowance | 0 | 0 | 0 | 0 | 0
Average Recorded Investment | 19,672 | 22,998 | 20,080 | 24,401 | 22,808
Recognized Interest Income | 202 | 218 | 389 | 415 | 839
With an Allowance Recorded |  |  |  |  |
Schedule of Financing Receivables [Line Items] |  |  |  |  |
Recorded Investment | 8,702 | 10,738 | 8,702 | 10,738 | 8,642
Unpaid Principal Balance | 8,879 | 11,142 | 8,879 | 11,142 | 8,959
Related Allowance | 1,029 | 1,307 | 1,029 | 1,307 | 754
Average Recorded Investment | 8,408 | 11,027 | 8,446 | 10,172 | 9,890
Recognized Interest Income | 80 | 117 | 168 | 222 | 381
Commercial real estate |  |  |  |  |
Schedule of Financing Receivables [Line Items] |  |  |  |  |
Recorded Investment | 10,685 | 12,566 | 10,685 | 12,566 | 10,717
Unpaid Principal Balance | 10,933 | 13,107 | 10,933 | 13,107 | 11,123
Related Allowance | 369 | 225 | 369 | 225 | 89
Average Recorded Investment | 10,434 | 12,638 | 10,526 | 12,766 | 12,056
Recognized Interest Income | 101 | 132 | 216 | 253 | 450
Commercial real estate | With No Related Allowance |  |  |  |  |
Schedule of Financing Receivables [Line Items] |  |  |  |  |
Recorded Investment | 6,654 | 8,986 | 6,654 | 8,986 | 7,173
Unpaid Principal Balance | 6,817 | 9,436 | 6,817 | 9,436 | 7,496
Related Allowance | 0 | 0 | 0 | 0 | 0
Average Recorded Investment | 6,916 | 9,020 | 7,068 | 9,959 | 8,990
Recognized Interest Income | 66 | 93 | 145 | 182 | 301
Commercial real estate | With an Allowance Recorded |  |  |  |  |
Schedule of Financing Receivables [Line Items] |  |  |  |  |
Recorded Investment | 4,031 | 3,580 | 4,031 | 3,580 | 3,544
Unpaid Principal Balance | 4,116 | 3,671 | 4,116 | 3,671 | 3,627
Related Allowance | 369 | 225 | 369 | 225 | 89
Average Recorded Investment | 3,518 | 3,618 | 3,458 | 2,807 | 3,066
Recognized Interest Income | 35 | 39 | 71 | 71 | 149
Commercial construction |  |  |  |  |
Schedule of Financing Receivables [Line Items] |  |  |  |  |
Recorded Investment | 834 | 989 | 834 | 989 | 1,026
Unpaid Principal Balance | 834 | 989 | 834 | 989 | 1,026
Related Allowance | 97 | 275 | 97 | 275 | 302
Average Recorded Investment | 828 | 1,249 | 917 | 1,311 | 1,156
Recognized Interest Income | 10 | 13 | 19 | 25 | 45
Commercial construction | With No Related Allowance |  |  |  |  |
Schedule of Financing Receivables [Line Items] |  |  |  |  |
Recorded Investment | 46 | 0 | 46 | 0 | 30
Unpaid Principal Balance | 46 | 0 | 46 | 0 | 30
Related Allowance | 0 | 0 | 0 | 0 | 0
Average Recorded Investment | 40 | 0 | 60 | 0 | 3
Recognized Interest Income | 0 | 0 | 1 | 0 | 1
Commercial construction | With an Allowance Recorded |  |  |  |  |
Schedule of Financing Receivables [Line Items] |  |  |  |  |
Recorded Investment | 788 | 989 | 788 | 989 | 996
Unpaid Principal Balance | 788 | 989 | 788 | 989 | 996
Related Allowance | 97 | 275 | 97 | 275 | 302
Average Recorded Investment | 788 | 1,249 | 857 | 1,311 | 1,153
Recognized Interest Income | 10 | 13 | 18 | 25 | 44
Commercial other |  |  |  |  |
Schedule of Financing Receivables [Line Items] |  |  |  |  |
Recorded Investment | 1,479 | 2,106 | 1,479 | 2,106 | 1,234
Unpaid Principal Balance | 1,524 | 2,186 | 1,524 | 2,186 | 1,287
Related Allowance | 158 | 275 | 158 | 275 | 8
Average Recorded Investment | 1,382 | 2,540 | 1,292 | 2,666 | 2,149
Recognized Interest Income | 25 | 30 | 33 | 46 | 81
Commercial other | With No Related Allowance |  |  |  |  |
Schedule of Financing Receivables [Line Items] |  |  |  |  |
Recorded Investment | 955 | 1,789 | 955 | 1,789 | 1,163
Unpaid Principal Balance | 994 | 1,855 | 994 | 1,855 | 1,210
Related Allowance | 0 | 0 | 0 | 0 | 0
Average Recorded Investment | 1,045 | 2,069 | 1,083 | 2,267 | 1,893
Recognized Interest Income | 13 | 27 | 21 | 42 | 76
Commercial other | With an Allowance Recorded |  |  |  |  |
Schedule of Financing Receivables [Line Items] |  |  |  |  |
Recorded Investment | 524 | 317 | 524 | 317 | 71
Unpaid Principal Balance | 530 | 331 | 530 | 331 | 77
Related Allowance | 158 | 275 | 158 | 275 | 8
Average Recorded Investment | 337 | 471 | 209 | 399 | 256
Recognized Interest Income | 12 | 3 | 12 | 4 | 5
Municipal |  |  |  |  |
Schedule of Financing Receivables [Line Items] |  |  |  |  |
Recorded Investment | 0 | 0 | 0 | 0 | 0
Unpaid Principal Balance | 0 | 0 | 0 | 0 | 0
Related Allowance | 0 | 0 | 0 | 0 | 0
Average Recorded Investment |  |  | 0 | 0 | 0
Recognized Interest Income |  |  | 0 | 0 | 0
Municipal | With No Related Allowance |  |  |  |  |
Schedule of Financing Receivables [Line Items] |  |  |  |  |
Recorded Investment | 0 | 0 | 0 | 0 | 0
Unpaid Principal Balance | 0 | 0 | 0 | 0 | 0
Related Allowance | 0 | 0 | 0 | 0 | 0
Average Recorded Investment |  |  | 0 | 0 | 0
Recognized Interest Income |  |  | 0 | 0 | 0
Municipal | With an Allowance Recorded |  |  |  |  |
Schedule of Financing Receivables [Line Items] |  |  |  |  |
Recorded Investment | 0 | 0 | 0 | 0 | 0
Unpaid Principal Balance | 0 | 0 | 0 | 0 | 0
Related Allowance | 0 | 0 | 0 | 0 | 0
Average Recorded Investment |  |  | 0 | 0 | 0
Recognized Interest Income |  |  | 0 | 0 | 0
Residential term |  |  |  |  |
Schedule of Financing Receivables [Line Items] |  |  |  |  |
Recorded Investment | 14,105 | 15,420 | 14,105 | 15,420 | 15,088
Unpaid Principal Balance | 15,351 | 16,619 | 15,351 | 16,619 | 16,350
Related Allowance | 326 | 501 | 326 | 501 | 326
Average Recorded Investment | 14,256 | 15,921 | 14,483 | 16,145 | 15,708
Recognized Interest Income | 141 | 150 | 275 | 293 | 595
Residential term | With No Related Allowance |  |  |  |  |
Schedule of Financing Receivables [Line Items] |  |  |  |  |
Recorded Investment | 10,924 | 9,636 | 10,924 | 9,636 | 11,122
Unpaid Principal Balance | 12,085 | 10,537 | 12,085 | 10,537 | 12,157
Related Allowance | 0 | 0 | 0 | 0 | 0
Average Recorded Investment | 10,592 | 10,458 | 10,653 | 10,797 | 10,480
Recognized Interest Income | 118 | 90 | 209 | 173 | 415
Residential term | With an Allowance Recorded |  |  |  |  |
Schedule of Financing Receivables [Line Items] |  |  |  |  |
Recorded Investment | 3,181 | 5,784 | 3,181 | 5,784 | 3,966
Unpaid Principal Balance | 3,266 | 6,082 | 3,266 | 6,082 | 4,193
Related Allowance | 326 | 501 | 326 | 501 | 326
Average Recorded Investment | 3,664 | 5,463 | 3,830 | 5,348 | 5,228
Recognized Interest Income | 23 | 60 | 66 | 120 | 180
Residential construction |  |  |  |  |
Schedule of Financing Receivables [Line Items] |  |  |  |  |
Recorded Investment | 0 | 0 | 0 | 0 | 0
Unpaid Principal Balance | 0 | 0 | 0 | 0 | 0
Related Allowance | 0 | 0 | 0 | 0 | 0
Average Recorded Investment | 0 | 0 | 0 | 0 | 0
Recognized Interest Income | 0 | 0 | 0 | 0 | 0
Residential construction | With No Related Allowance |  |  |  |  |
Schedule of Financing Receivables [Line Items] |  |  |  |  |
Recorded Investment | 0 | 0 | 0 | 0 | 0
Unpaid Principal Balance | 0 | 0 | 0 | 0 | 0
Related Allowance | 0 | 0 | 0 | 0 | 0
Average Recorded Investment | 0 | 0 | 0 | 0 | 0
Recognized Interest Income | 0 | 0 | 0 | 0 | 0
Residential construction | With an Allowance Recorded |  |  |  |  |
Schedule of Financing Receivables [Line Items] |  |  |  |  |
Recorded Investment | 0 | 0 | 0 | 0 | 0
Unpaid Principal Balance | 0 | 0 | 0 | 0 | 0
Related Allowance | 0 | 0 | 0 | 0 | 0
Average Recorded Investment | 0 | 0 | 0 | 0 | 0
Recognized Interest Income | 0 | 0 | 0 | 0 | 0
Home equity line of credit |  |  |  |  |
Schedule of Financing Receivables [Line Items] |  |  |  |  |
Recorded Investment | 975 | 1,572 | 975 | 1,572 | 1,466
Unpaid Principal Balance | 1,330 | 2,209 | 1,330 | 2,209 | 2,120
Related Allowance | 28 | 31 | 28 | 31 | 29
Average Recorded Investment | 1,142 | 1,597 | 1,289 | 1,633 | 1,587
Recognized Interest Income | 5 | 8 | 14 | 17 | 46
Home equity line of credit | With No Related Allowance |  |  |  |  |
Schedule of Financing Receivables [Line Items] |  |  |  |  |
Recorded Investment | 912 | 1,504 | 912 | 1,504 | 1,401
Unpaid Principal Balance | 1,266 | 2,140 | 1,266 | 2,140 | 2,054
Related Allowance | 0 | 0 | 0 | 0 | 0
Average Recorded Investment | 1,079 | 1,371 | 1,216 | 1,326 | 1,400
Recognized Interest Income | 5 | 8 | 13 | 15 | 43
Home equity line of credit | With an Allowance Recorded |  |  |  |  |
Schedule of Financing Receivables [Line Items] |  |  |  |  |
Recorded Investment | 63 | 68 | 63 | 68 | 65
Unpaid Principal Balance | 64 | 69 | 64 | 69 | 66
Related Allowance | 28 | 31 | 28 | 31 | 29
Average Recorded Investment | 63 | 226 | 73 | 307 | 187
Recognized Interest Income | 0 | 0 | 1 | 2 | 3
Consumer |  |  |  |  |
Schedule of Financing Receivables [Line Items] |  |  |  |  |
Recorded Investment | 115 | 95 | 115 | 95 | 0
Unpaid Principal Balance | 115 | 138 | 115 | 138 | 0
Related Allowance | 51 | 0 | 51 | 0 | 0
Average Recorded Investment | 38 | 80 | 19 | 52 | 42
Recognized Interest Income | 0 | 2 | 0 | 3 | 3
Consumer | With No Related Allowance |  |  |  |  |
Schedule of Financing Receivables [Line Items] |  |  |  |  |
Recorded Investment | 0 | 95 | 0 | 95 | 0
Unpaid Principal Balance | 0 | 138 | 0 | 138 | 0
Related Allowance | 0 | 0 | 0 | 0 | 0
Average Recorded Investment | 0 | 80 | 0 | 52 | 42
Recognized Interest Income | 0 | 0 | 0 | 3 | 3
Consumer | With an Allowance Recorded |  |  |  |  |
Schedule of Financing Receivables [Line Items] |  |  |  |  |
Recorded Investment | 115 | 0 | 115 | 0 | 0
Unpaid Principal Balance | 115 | 0 | 115 | 0 | 0
Related Allowance | 51 | 0 | 51 | 0 | 0
Average Recorded Investment | 38 | 0 | 19 | 0 | 0
Recognized Interest Income | $ 0 | $ 2 | $ 0 | $ 0 | $ 0

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