Commitments and Contingencies - Tax Credit and Certain Equity Method Investments (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Renewable energy investments:
Other Commitments [Line Items]
Amount of future funding commitments	$ 14,406	$ 14,406
Fintech funds and certain other equity method investments:
Other Commitments [Line Items]
Amount of future funding commitments	28,313	25,008
Other assets | Investments in LIHTC:
Other Commitments [Line Items]
Investments in LIHTC: Carrying amount	57,728	48,867
Other assets | Renewable energy investments:
Other Commitments [Line Items]
Carrying amount	4,594	18,631
Other assets | Fintech funds and certain other equity method investments:
Other Commitments [Line Items]
Carrying amount	34,401	33,720
Other liabilities | Investments in LIHTC:
Other Commitments [Line Items]
Investments in LIHTC: Amount of future funding commitments included in carrying amount	22,178	14,176
Loans and leases held for investment | Investments in LIHTC:
Other Commitments [Line Items]
Investments in LIHTC: Lending exposure	$ 11,691	$ 803