Bank segment - Credit Risk Profile - Troubled Debt Restructured Loans (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2022 USD ($)
Financing Receivable, Modified [Line Items]
Total troubled debt restructured loans accruing interest	$ 30,130
Real estate | Residential 1-4 family
Financing Receivable, Modified [Line Items]
Total troubled debt restructured loans accruing interest	8,821
Real estate | Commercial real estate
Financing Receivable, Modified [Line Items]
Total troubled debt restructured loans accruing interest	9,477
Real estate | Home equity line of credit
Financing Receivable, Modified [Line Items]
Total troubled debt restructured loans accruing interest	4,404
Real estate | Residential land
Financing Receivable, Modified [Line Items]
Total troubled debt restructured loans accruing interest	782
Real estate | Commercial construction
Financing Receivable, Modified [Line Items]
Total troubled debt restructured loans accruing interest	0
Real estate | Residential construction
Financing Receivable, Modified [Line Items]
Total troubled debt restructured loans accruing interest	0
Commercial
Financing Receivable, Modified [Line Items]
Total troubled debt restructured loans accruing interest	6,596
Consumer
Financing Receivable, Modified [Line Items]
Total troubled debt restructured loans accruing interest	$ 50