Allowance for credit losses - T D R that subsequently defaulted (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2022 USD ($) loans
Financing Receivable, Modifications [Line Items]
Loan count | loans	163
Recorded investment as of first default date | $	$ 17,822
Mortgages
Financing Receivable, Modifications [Line Items]
Loan count | loans	75
Recorded investment as of first default date | $	$ 9,391
Commercial | CRE owner occupied
Financing Receivable, Modifications [Line Items]
Loan count | loans	2
Recorded investment as of first default date | $	$ 620
Commercial | Commercial and Industrial
Financing Receivable, Modifications [Line Items]
Loan count | loans	7
Recorded investment as of first default date | $	$ 6,639
Leasing
Financing Receivable, Modifications [Line Items]
Loan count | loans	1
Recorded investment as of first default date | $	$ 5
Consumer | Credit card
Financing Receivable, Modifications [Line Items]
Loan count | loans	29
Recorded investment as of first default date | $	$ 249
Consumer | Personal loans
Financing Receivable, Modifications [Line Items]
Loan count | loans	49
Recorded investment as of first default date | $	$ 918