Commitments and Contingencies - Years In Which Commitments are Expected to be Paid (Details) $ in Thousands	Mar. 31, 2022 USD ($)
Other Commitments [Line Items]
Commitments to contribute capital to small business investment companies and CRA-related loan pools	$ 84,772
2022
Other Commitments [Line Items]
Commitments to contribute capital to small business investment companies and CRA-related loan pools	38,496
2023
Other Commitments [Line Items]
Commitments to contribute capital to small business investment companies and CRA-related loan pools	$ 46,276