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Other Comprehensive Income - Summary of Changes in Component of AOCI (Detail) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Sep. 30, 2025
Sep. 30, 2024
Beginning Balance $ 60,801 $ 64,500 $ 62,050 $ 66,618
Other comprehensive income (loss) before reclassification 1,706 2,086 1,673 669
Amounts reclassified from AOCI 82 92 295 300
Other comprehensive income 1,788 2,178 1,968 969
Ending Balance 63,160 65,789 63,160 65,789
Net Unrealized Income (Losses) on AFS Securities [Member]        
Beginning Balance (6,824) (7,153) (7,013) (5,944)
Other comprehensive income (loss) before reclassification 1,703 2,182 1,679 765
Amounts reclassified from AOCI 82 107 295 315
Other comprehensive income 1,785 2,289 1,974 1,080
Ending Balance (5,039) (4,864) (5,039) (4,864)
Net Unrealized Losses on Cash Flow Hedges [Member]        
Beginning Balance (40)   (31)  
Other comprehensive income (loss) before reclassification 3 (96) (6) (96)
Amounts reclassified from AOCI   (15)   (15)
Other comprehensive income 3 (111) (6) (111)
Ending Balance (37) (111) (37) (111)
Accumulated Other Comprehensive Income [Member]        
Beginning Balance (6,864) (7,153) (7,044) (5,944)
Other comprehensive income 1,788 2,178 1,968 969
Ending Balance $ (5,076) $ (4,975) $ (5,076) $ (4,975)