Variable Interest Entities - Additional Information (Details) $ in Millions	Mar. 31, 2023 USD ($) Property	Dec. 31, 2022 Property
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Variable Interest Entities | Property	31	35
Investments in Unconsolidated Entities [Member] | Non-Consolidated VIEs [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Maximum exposure to loss, funding commitments	$ 32.9
Mortgage Revenue Bonds [Member] | Non-Consolidated VIEs [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Maximum exposure to loss, funding commitments	102.5
Taxable Mortgage Revenue Bonds [Member] | Non-Consolidated VIEs [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Maximum exposure to loss, funding commitments	25.9
Governmental Issuer Loans [Member] | Non-Consolidated VIEs [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Maximum exposure to loss, funding commitments	87.5
Taxable Governmental Issuer Loans [Member] | Non-Consolidated VIEs [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Maximum exposure to loss, funding commitments	56.2
Property Loans [Member] | Non-Consolidated VIEs [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Maximum exposure to loss, funding commitments	$ 49.1