v3.26.1
Investment Securities - Summary of Amortized Cost and Estimated Fair Value (Detail) - USD ($)
$ in Thousands
 6 Months Ended 12 Months Ended
Jun. 30, 2026
Dec. 31, 2025
Debt Securities, Available-for-Sale [Line Items]    
Amortized cost $ 268,978 $ 189,924
Gross Unrealized Gains 1,232 710
Gross Unrealized Losses (8,719) (8,065)
Securities available-for-sale, at fair value 261,491 182,569
Mortgage-backed securities - U.S. Government Sponsored Enterprises (GSEs) [Member]    
Debt Securities, Available-for-Sale [Line Items]    
Amortized cost 213,855 132,040
Gross Unrealized Gains 1,224 688
Gross Unrealized Losses (5,508) (5,081)
Securities available-for-sale, at fair value 209,571 127,647
U.S. government agency securities [Member]    
Debt Securities, Available-for-Sale [Line Items]    
Amortized cost 11,260 11,260
Gross Unrealized Gains 0 2
Gross Unrealized Losses (832) (750)
Securities available-for-sale, at fair value 10,428 10,512
Obligations of state and political subdivisions [Member]    
Debt Securities, Available-for-Sale [Line Items]    
Amortized cost 40,957 42,423
Gross Unrealized Gains 4 8
Gross Unrealized Losses (2,376) (2,233)
Securities available-for-sale, at fair value 38,585 40,198
Small business association (SBA) securities [Member]    
Debt Securities, Available-for-Sale [Line Items]    
Amortized cost 931 1,254
Gross Unrealized Gains 4 6
Gross Unrealized Losses (2) (1)
Securities available-for-sale, at fair value 933 1,259
US Treasury Securities [Member]    
Debt Securities, Available-for-Sale [Line Items]    
Amortized cost 1,975 2,947
Gross Unrealized Gains 0 6
Gross Unrealized Losses (1) 0
Securities available-for-sale, at fair value $ 1,974 $ 2,953