Variable Interest Entities - Narrative (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Variable Interest Entity [Line Items]
Unpaid principal balance for loans and participations serviced for others	$ 373,800	$ 463,400
Accrued expenses and other liabilities	216,596	206,023
Multifamily Loan Securitization
Variable Interest Entity [Line Items]
Unpaid principal balance for loans and participations serviced for others	48,000	54,200
Variable Interest Entity, Not Primary Beneficiary
Variable Interest Entity [Line Items]
Maximum Loss	$ 153,214	168,216
Variable Interest Entity, Not Primary Beneficiary | Multifamily Loan Securitization, Liability
Variable Interest Entity [Line Items]
Maximum loss, percentage of loans	10.00%
Maximum Loss	$ 47,994	50,901
Accrued expenses and other liabilities	345	334
Variable Interest Entity, Not Primary Beneficiary | Multifamily Loan Securitization
Variable Interest Entity [Line Items]
Accrued expenses and other liabilities	$ 345	$ 334