Guarantees - Credit recourse - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022	Dec. 31, 2021
Guarantee on loans sold or serviced with credit recourse
Guarantor Obligations [Line Items]
Valuation allowances and reserves balance	$ 5,864	$ 10,335	$ 6,897	$ 11,800
Serviced mortgage loans
Guarantor Obligations [Line Items]
Loans serviced	10,900,000		11,100,000
Loans with recourse
Guarantor Obligations [Line Items]
Loans serviced	600,000		600,000
Loans with recourse | Serviced mortgage loans
Guarantor Obligations [Line Items]
Repurchased loans	1,000	3,000
Loans with recourse | Residential mortgage loans
Guarantor Obligations [Line Items]
Loans serviced	600,000		$ 600,000
Securitization | Guarantee on loans sold or serviced with representation and warranties
Guarantor Obligations [Line Items]
Repurchased loans	$ 134	$ 927