Commitments, Credit Risk and Contingencies - Additional Information (Detail) - USD ($) $ in Millions |
Dec. 31, 2021 |
Dec. 31, 2020 |
---|---|---|
Commitments and Contingencies Disclosure [Abstract] | ||
Percentage of commitments to extend credit dependent upon the financial condition of the customers | 72.40% | |
Allowance for credit losses on loan commitments that are not unconditionally cancellable | $ 19.2 | $ 13.7 |