Variable Interest Entities - Schedule of Variable Interest Entities (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Variable Interest Entity [Line Items]
Investment securities available-for-sale, at fair value	$ 1,140,071	$ 2,601,013
Accrued expenses and other liabilities	216,596	206,023
Other assets	368,996	253,871
Assets	19,026,645	21,688,017
Liabilities	16,144,064	18,889,628
Variable Interest Entity, Not Primary Beneficiary
Variable Interest Entity [Line Items]
Maximum Loss	153,214	168,216
Assets	137,289	132,743
Liabilities	32,415	15,762
Variable Interest Entity, Not Primary Beneficiary | Multifamily Loan Securitization, Asset
Variable Interest Entity [Line Items]
Maximum Loss	48,204	56,784
Investment securities available-for-sale, at fair value	48,204	56,784
Variable Interest Entity, Not Primary Beneficiary | Multifamily Loan Securitization, Liability
Variable Interest Entity [Line Items]
Maximum Loss	47,994	50,901
Accrued expenses and other liabilities	345	334
Variable Interest Entity, Not Primary Beneficiary | Affordable Housing Partnership, Asset
Variable Interest Entity [Line Items]
Maximum Loss	57,016	60,531
Other assets	89,085	75,959
Variable Interest Entity, Not Primary Beneficiary | Affordable Housing Partnership, Liability
Variable Interest Entity [Line Items]
Maximum Loss	0	0
Accrued expenses and other liabilities	$ 32,070	$ 15,428