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Bank segment - Principal balance of impaired loans (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2018 | Sep. 30, 2017 | Sep. 30, 2018 | Sep. 30, 2017 | Dec. 31, 2017
Recorded investment: |  |  |  |  |
With no related allowance recorded | $ 17,085 |  | $ 17,085 |  | $ 14,072
With an allowance recorded | 24,075 |  | 24,075 |  | 19,321
Recorded investment | 41,160 |  | 41,160 |  | 33,393
Unpaid principal balance: |  |  |  |  |
With no related allowance recorded | 19,117 |  | 19,117 |  | 16,041
With an allowance recorded | 24,363 |  | 24,363 |  | 19,574
Unpaid principal balance | 43,480 |  | 43,480 |  | 35,615
Related Allowance | 2,890 |  | 2,890 |  | 2,730
Average recorded investment: |  |  |  |  |
With no related allowance recorded | 16,895 | $ 14,585 | 15,357 | $ 15,700 |
With an allowance recorded | 23,746 | 19,948 | 21,916 | 21,704 |
Average recorded investment | 40,641 | 34,533 | 37,273 | 37,404 |
Interest income recognized: |  |  |  |  |
With no related allowance recorded | 274 | 204 | 473 | 482 |
With an allowance recorded | 235 | 416 | 694 | 1,307 |
Interest income recognized | 509 | 620 | 1,167 | 1,789 |
Residential 1-4 family |  |  |  |  |
Recorded investment: |  |  |  |  |
With no related allowance recorded | 8,689 |  | 8,689 |  | 9,097
With an allowance recorded | 9,014 |  | 9,014 |  | 9,187
Recorded investment | 17,703 |  | 17,703 |  | 18,284
Unpaid principal balance: |  |  |  |  |
With no related allowance recorded | 9,200 |  | 9,200 |  | 9,644
With an allowance recorded | 9,218 |  | 9,218 |  | 9,390
Unpaid principal balance | 18,418 |  | 18,418 |  | 19,034
Related Allowance | 1,020 |  | 1,020 |  | 1,248
Average recorded investment: |  |  |  |  |
With no related allowance recorded | 8,940 | 9,650 | 8,779 | 9,503 |
With an allowance recorded | 8,820 | 9,788 | 8,909 | 9,963 |
Average recorded investment | 17,760 | 19,438 | 17,688 | 19,466 |
Interest income recognized: |  |  |  |  |
With no related allowance recorded | 239 | 70 | 396 | 230 |
With an allowance recorded | 84 | 97 | 274 | 333 |
Interest income recognized | 323 | 167 | 670 | 563 |
Commercial real estate |  |  |  |  |
Recorded investment: |  |  |  |  |
With no related allowance recorded | 0 |  | 0 |  | 0
With an allowance recorded | 981 |  | 981 |  | 1,016
Recorded investment | 981 |  | 981 |  | 1,016
Unpaid principal balance: |  |  |  |  |
With no related allowance recorded | 0 |  | 0 |  | 0
With an allowance recorded | 981 |  | 981 |  | 1,016
Unpaid principal balance | 981 |  | 981 |  | 1,016
Related Allowance | 51 |  | 51 |  | 65
Average recorded investment: |  |  |  |  |
With no related allowance recorded | 0 | 0 | 0 | 121 |
With an allowance recorded | 985 | 1,284 | 997 | 1,292 |
Average recorded investment | 985 | 1,284 | 997 | 1,413 |
Interest income recognized: |  |  |  |  |
With no related allowance recorded | 0 | 0 | 0 | 11 |
With an allowance recorded | 11 | 13 | 32 | 41 |
Interest income recognized | 11 | 13 | 32 | 52 |
Home equity line of credit |  |  |  |  |
Recorded investment: |  |  |  |  |
With no related allowance recorded | 2,359 |  | 2,359 |  | 1,496
With an allowance recorded | 12,243 |  | 12,243 |  | 6,692
Recorded investment | 14,602 |  | 14,602 |  | 8,188
Unpaid principal balance: |  |  |  |  |
With no related allowance recorded | 2,714 |  | 2,714 |  | 1,789
With an allowance recorded | 12,327 |  | 12,327 |  | 6,736
Unpaid principal balance | 15,041 |  | 15,041 |  | 8,525
Related Allowance | 1,088 |  | 1,088 |  | 647
Average recorded investment: |  |  |  |  |
With no related allowance recorded | 2,234 | 1,918 | 2,103 | 2,108 |
With an allowance recorded | 12,090 | 5,076 | 10,083 | 4,670 |
Average recorded investment | 14,324 | 6,994 | 12,186 | 6,778 |
Interest income recognized: |  |  |  |  |
With no related allowance recorded | 23 | 32 | 35 | 97 |
With an allowance recorded | 111 | 68 | 288 | 164 |
Interest income recognized | 134 | 100 | 323 | 261 |
Residential land |  |  |  |  |
Recorded investment: |  |  |  |  |
With no related allowance recorded | 2,057 |  | 2,057 |  | 1,143
With an allowance recorded | 0 |  | 0 |  | 122
Recorded investment | 2,057 |  | 2,057 |  | 1,265
Unpaid principal balance: |  |  |  |  |
With no related allowance recorded | 2,256 |  | 2,256 |  | 1,434
With an allowance recorded | 0 |  | 0 |  | 122
Unpaid principal balance | 2,256 |  | 2,256 |  | 1,556
Related Allowance | 0 |  | 0 |  | 47
Average recorded investment: |  |  |  |  |
With no related allowance recorded | 1,773 | 1,209 | 1,358 | 1,080 |
With an allowance recorded | 20 | 1,251 | 45 | 1,620 |
Average recorded investment | 1,793 | 2,460 | 1,403 | 2,700 |
Interest income recognized: |  |  |  |  |
With no related allowance recorded | 6 | 73 | 16 | 107 |
With an allowance recorded | 0 | 12 | 3 | 73 |
Interest income recognized | 6 | 85 | 19 | 180 |
Commercial construction |  |  |  |  |
Recorded investment: |  |  |  |  |
With no related allowance recorded | 0 |  | 0 |  | 0
With an allowance recorded | 0 |  | 0 |  | 0
Recorded investment | 0 |  | 0 |  | 0
Unpaid principal balance: |  |  |  |  |
With no related allowance recorded | 0 |  | 0 |  | 0
With an allowance recorded | 0 |  | 0 |  | 0
Unpaid principal balance | 0 |  | 0 |  | 0
Related Allowance | 0 |  | 0 |  | 0
Average recorded investment: |  |  |  |  |
With no related allowance recorded | 0 | 0 | 0 | 0 |
With an allowance recorded | 0 | 0 | 0 | 0 |
Average recorded investment | 0 | 0 | 0 | 0 |
Interest income recognized: |  |  |  |  |
With no related allowance recorded | 0 | 0 | 0 | 0 |
With an allowance recorded | 0 | 0 | 0 | 0 |
Interest income recognized | 0 | 0 | 0 | 0 |
Residential construction |  |  |  |  |
Recorded investment: |  |  |  |  |
With no related allowance recorded | 0 |  | 0 |  | 0
With an allowance recorded | 0 |  | 0 |  | 0
Recorded investment | 0 |  | 0 |  | 0
Unpaid principal balance: |  |  |  |  |
With no related allowance recorded | 0 |  | 0 |  | 0
With an allowance recorded | 0 |  | 0 |  | 0
Unpaid principal balance | 0 |  | 0 |  | 0
Related Allowance | 0 |  | 0 |  | 0
Average recorded investment: |  |  |  |  |
With no related allowance recorded | 0 | 0 | 0 | 0 |
With an allowance recorded | 0 | 0 | 0 | 0 |
Average recorded investment | 0 | 0 | 0 | 0 |
Interest income recognized: |  |  |  |  |
With no related allowance recorded | 0 | 0 | 0 | 0 |
With an allowance recorded | 0 | 0 | 0 | 0 |
Interest income recognized | 0 | 0 | 0 | 0 |
Commercial loans |  |  |  |  |
Recorded investment: |  |  |  |  |
With no related allowance recorded | 3,948 |  | 3,948 |  | 2,328
With an allowance recorded | 1,779 |  | 1,779 |  | 2,246
Recorded investment | 5,727 |  | 5,727 |  | 4,574
Unpaid principal balance: |  |  |  |  |
With no related allowance recorded | 4,915 |  | 4,915 |  | 3,166
With an allowance recorded | 1,779 |  | 1,779 |  | 2,252
Unpaid principal balance | 6,694 |  | 6,694 |  | 5,418
Related Allowance | 728 |  | 728 |  | 694
Average recorded investment: |  |  |  |  |
With no related allowance recorded | 3,915 | 1,808 | 3,099 | 2,888 |
With an allowance recorded | 1,774 | 2,482 | 1,824 | 4,104 |
Average recorded investment | 5,689 | 4,290 | 4,923 | 6,992 |
Interest income recognized: |  |  |  |  |
With no related allowance recorded | 6 | 29 | 26 | 37 |
With an allowance recorded | 28 | 225 | 94 | 694 |
Interest income recognized | 34 | 254 | 120 | 731 |
Consumer loans |  |  |  |  |
Recorded investment: |  |  |  |  |
With no related allowance recorded | 32 |  | 32 |  | 8
With an allowance recorded | 58 |  | 58 |  | 58
Recorded investment | 90 |  | 90 |  | 66
Unpaid principal balance: |  |  |  |  |
With no related allowance recorded | 32 |  | 32 |  | 8
With an allowance recorded | 58 |  | 58 |  | 58
Unpaid principal balance | 90 |  | 90 |  | 66
Related Allowance | 3 |  | 3 |  | $ 29
Average recorded investment: |  |  |  |  |
With no related allowance recorded | 33 | 0 | 18 | 0 |
With an allowance recorded | 57 | 67 | 58 | 55 |
Average recorded investment | 90 | 67 | 76 | 55 |
Interest income recognized: |  |  |  |  |
With no related allowance recorded | 0 | 0 | 0 | 0 |
With an allowance recorded | 1 | 1 | 3 | 2 |
Interest income recognized | $ 1 | $ 1 | $ 3 | $ 2 |

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