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Bank segment - Loan modifications (Details) - Troubled debt restructurings real estate loans $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2020 USD ($) contract | Sep. 30, 2019 USD ($) contract | Sep. 30, 2020 USD ($) contract | Sep. 30, 2019 USD ($) contract
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Number of contracts | contract | 2 | 5 | 12 | 22
Outstanding recorded investment | $ 52 | $ 949 | $ 16,752 | $ 4,922
Related allowance | $ 45 | $ 58 | $ 4,222 | $ 468
Real estate | Residential 1-4 family |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Number of contracts | contract | 0 | 1 | 1 | 10
Outstanding recorded investment | $ 0 | $ 324 | $ 146 | $ 1,563
Related allowance | $ 0 | $ 0 | $ 7 | $ 165
Real estate | Commercial real estate |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Number of contracts | contract | 0 | 0 | 2 | 0
Outstanding recorded investment | $ 0 | $ 0 | $ 16,149 | $ 0
Related allowance | $ 0 | $ 0 | $ 4,019 | $ 0
Real estate | Home equity line of credit |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Number of contracts | contract | 0 | 0 | 2 | 3
Outstanding recorded investment | $ 0 | $ 0 | $ 22 | $ 429
Related allowance | $ 0 | $ 0 | $ 1 | $ 85
Real estate | Residential land |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Number of contracts | contract | 0 | 1 | 2 | 3
Outstanding recorded investment | $ 0 | $ 350 | $ 228 | $ 1,169
Related allowance | $ 0 | $ 0 | $ 15 | $ 0
Real estate | Commercial construction |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Number of contracts | contract | 0 | 0 | 0 | 0
Outstanding recorded investment | $ 0 | $ 0 | $ 0 | $ 0
Related allowance | $ 0 | $ 0 | $ 0 | $ 0
Real estate | Residential construction |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Number of contracts | contract | 0 | 0 | 0 | 0
Outstanding recorded investment | $ 0 | $ 0 | $ 0 | $ 0
Related allowance | $ 0 | $ 0 | $ 0 | $ 0
Commercial |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Number of contracts | contract | 2 | 3 | 5 | 6
Outstanding recorded investment | $ 52 | $ 275 | $ 207 | $ 1,761
Related allowance | $ 45 | $ 58 | $ 180 | $ 218
Consumer |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Number of contracts | contract | 0 | 0 | 0 | 0
Outstanding recorded investment | $ 0 | $ 0 | $ 0 | $ 0
Related allowance | $ 0 | $ 0 | $ 0 | $ 0

X
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