Allowance for credit losses - T D R that subsequently defaulted (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022 USD ($) loans	Sep. 30, 2021 USD ($) loans	Sep. 30, 2022 USD ($) loans	Sep. 30, 2021 USD ($) loans
Financing Receivable
Loan count | loans	58	56	138	179
Recorded investment as of first default date | $	$ 5,422	$ 3,246	$ 14,169	$ 21,907
Mortgages
Financing Receivable
Loan count | loans	35	25	73	72
Recorded investment as of first default date | $	$ 3,500	$ 2,503	$ 9,200	$ 7,514
Commercial | CRE non-owner occupied
Financing Receivable
Loan count | loans		0		4
Recorded investment as of first default date | $		$ 0		$ 8,421
Commercial | CRE owner occupied
Financing Receivable
Loan count | loans	1	1	1	3
Recorded investment as of first default date | $	$ 560	$ 383	$ 560	$ 4,138
Commercial | Commercial and Industrial
Financing Receivable
Loan count | loans	2	0	5	5
Recorded investment as of first default date | $	$ 1,165	$ 0	$ 3,661	$ 317
Leasing
Financing Receivable
Loan count | loans	1		1
Recorded investment as of first default date | $	$ 5		$ 5
Consumer | Credit card
Financing Receivable
Loan count | loans	4	17	24	74
Recorded investment as of first default date | $	$ 32	$ 202	$ 185	$ 914
Consumer | Personal loans
Financing Receivable
Loan count | loans	15	13	34	21
Recorded investment as of first default date | $	$ 160	$ 158	$ 558	$ 603