Commitments, Contingencies and Guarantees - Additional Information (Detail) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Mar. 31, 2022	Dec. 31, 2021	Mar. 31, 2021	Dec. 31, 2020
Commitments and Contingencies Disclosure [Line Items]
ACL for off-balance sheet credit exposures	$ 3,088,000	$ 3,588,000	$ 3,088,000	$ 3,588,000	$ 3,088,000	$ 2,588,000	$ 5,588,000	$ 5,588,000
Provision for off-balance sheet credit exposures		(2,000,000)	500,000	(2,000,000)
Accrued Expenses and Taxes [Member]
Commitments and Contingencies Disclosure [Line Items]
ACL for off-balance sheet credit exposures	3,100,000		3,100,000			$ 2,600,000
Provision for Credit Losses [Member]
Commitments and Contingencies Disclosure [Line Items]
Provision for off-balance sheet credit exposures	$ 0	$ (2,000,000.0)	$ (500,000)	$ (2,000,000.0)