Commitments and Contingencies - Additional Information (Detail) - USD ($) $ in Thousands	Mar. 31, 2023	Jan. 01, 2023	Dec. 31, 2022
Other Commitments [Line Items]
Outstanding loan commitments	$ 707,900		$ 736,100
Outstanding stand-by letters of credit	29,300		29,800
Reserve for unfunded commitments		$ 3,700	1,812
Credit losses for unfunded commitments	400
Future commitments outstanding related to investments	17,700
Other Liabilities [Member]
Other Commitments [Line Items]
Reserve for unfunded commitments	5,100		1,800
Performance Stand-by Letters of Credit [Member]
Other Commitments [Line Items]
Outstanding stand-by letters of credit	$ 0		$ 655