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Bank segment - Loan modifications (Details) - Troubled debt restructurings real estate loans $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2022 USD ($) contract | Jun. 30, 2021 USD ($) contract | Jun. 30, 2022 USD ($) contract | Jun. 30, 2021 USD ($) contract
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Number of contracts | contract | 1 | 8 | 1 | 24
Outstanding recorded investment | $ 381 | $ 2,360 | $ 381 | $ 11,041
Related allowance | $ 135 | $ 100 | $ 135 | $ 338
Real estate | Residential 1-4 family |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Number of contracts | contract | 1 | 3 | 1 | 15
Outstanding recorded investment | $ 381 | $ 1,835 | $ 381 | $ 10,024
Related allowance | $ 135 | $ 77 | $ 135 | $ 271
Real estate | Commercial real estate |  |  |  |
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 | Home equity line of credit |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Number of contracts | contract | 0 | 0 | 0 | 1
Outstanding recorded investment | $ 0 | $ 0 | $ 0 | $ 163
Related allowance | $ 0 | $ 0 | $ 0 | $ 18
Real estate | Residential land |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Number of contracts | contract | 0 | 1 | 0 | 2
Outstanding recorded investment | $ 0 | $ 288 | $ 0 | $ 558
Related allowance | $ 0 | $ 12 | $ 0 | $ 23
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 | 0 | 4 | 0 | 6
Outstanding recorded investment | $ 0 | $ 237 | $ 0 | $ 296
Related allowance | $ 0 | $ 11 | $ 0 | $ 26
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

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