Commitments and Contingencies - Additional Information (Detail) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Other Commitments [Line Items]
Outstanding loan commitments	$ 475,100	$ 126,000
Future commitments outstanding related to investments	8,300
SBIC [Member]
Other Commitments [Line Items]
Future commitments outstanding related to investments	11,400
Other Liabilities [Member]
Other Commitments [Line Items]
Reserves for unfunded commitments to borrowers	962	0
Performance Stand-by Letters of Credit [Member]
Other Commitments [Line Items]
Outstanding performance stand-by letters of credit	655	0
Financial Stand-by Letters of Credit [Member]
Other Commitments [Line Items]
Outstanding performance stand-by letters of credit	$ 4,500	$ 6,100