Fair Value Measurements - Summary of Impaired Loans Measured at Fair Value on a Non-Recurring Basis (Detail) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Carrying Amount [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Assets measured at fair value on a nonrecurring basis	$ 181	$ 1,250
Carrying Amount [Member] | Commercial [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Assets measured at fair value on a nonrecurring basis		1,028
Carrying Amount [Member] | SBA [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Assets measured at fair value on a nonrecurring basis	181	222
Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Assets measured at fair value on a nonrecurring basis	181	1,250
Level 3 [Member] | Commercial [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Assets measured at fair value on a nonrecurring basis		1,028
Level 3 [Member] | SBA [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Assets measured at fair value on a nonrecurring basis	$ 181	$ 222