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Bank segment - Credit risk profile - nonaccrual loans (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2020 | Dec. 31, 2019
Credit risk profile based on nonaccrual loans |  |
Nonaccrual loans | $ 46,766 | $ 29,736
Total troubled debt restructuring loans not included above | 25,856 | 26,413
Residential 1-4 family |  |
Credit risk profile based on nonaccrual loans |  |
Nonaccrual loans | 10,747 | 11,395
Total troubled debt restructuring loans not included above | 9,254 | 9,869
Commercial real estate |  |
Credit risk profile based on nonaccrual loans |  |
Nonaccrual loans | 16,390 | 195
Total troubled debt restructuring loans not included above | 1,035 | 853
Nonaccrual loans with no related allowance | 2,300 |
Home equity line of credit |  |
Credit risk profile based on nonaccrual loans |  |
Nonaccrual loans | 6,596 | 6,638
Total troubled debt restructuring loans not included above | 9,628 | 10,376
Nonaccrual loans with no related allowance | 1,800 |
Residential land |  |
Credit risk profile based on nonaccrual loans |  |
Nonaccrual loans | 413 | 448
Total troubled debt restructuring loans not included above | 2,622 | 2,644
Nonaccrual loans with no related allowance | 4,100 |
Commercial construction |  |
Credit risk profile based on nonaccrual loans |  |
Nonaccrual loans | 2,289 | 0
Total troubled debt restructuring loans not included above | 0 | 0
Residential construction |  |
Credit risk profile based on nonaccrual loans |  |
Nonaccrual loans | 0 | 0
Total troubled debt restructuring loans not included above | 0 | 0
Commercial loans |  |
Credit risk profile based on nonaccrual loans |  |
Nonaccrual loans | 5,366 | 5,947
Total troubled debt restructuring loans not included above | 3,261 | 2,614
Nonaccrual loans with no related allowance | 5,100 |
Consumer loans |  |
Credit risk profile based on nonaccrual loans |  |
Nonaccrual loans | 4,965 | 5,113
Total troubled debt restructuring loans not included above | $ 56 | $ 57

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