Commitments and Contingencies - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2023	Jun. 30, 2023	Jan. 01, 2023	Dec. 31, 2022
Other Commitments [Line Items]
Outstanding loan commitments	$ 679,100	$ 679,100		$ 736,100
Outstanding stand-by letters of credit	29,500	29,500		29,800
Reserve for unfunded commitments			$ 3,700	1,812
Credit losses for unfunded commitments	600	1,000
Future commitments outstanding related to investments	17,900	17,900
Other Liabilities [Member]
Other Commitments [Line Items]
Reserve for unfunded commitments	$ 4,500	$ 4,500		$ 1,800