v3.26.1
Securities - Amortized Cost and Fair Value of Securities with Gross Unrealized Gains and Losses (Detail) - USD ($)
$ in Thousands
Jun. 30, 2026
Dec. 31, 2025
Schedule of Available-for-sale Securities [Line Items]    
Amortized Cost $ 458,920 $ 437,120
Gross Unrealized Gains 219 1,378
Gross Unrealized Losses (17,885) (16,426)
Fair Value 441,254 422,072
U.S. Treasury [Member]    
Schedule of Available-for-sale Securities [Line Items]    
Amortized Cost 118,587 91,988
Gross Unrealized Gains 0 157
Gross Unrealized Losses (3,047) (2,292)
Fair Value 115,540 89,853
U.S. Government Agencies [Member]    
Schedule of Available-for-sale Securities [Line Items]    
Amortized Cost 109,297 136,026
Gross Unrealized Gains 5 116
Gross Unrealized Losses (3,601) (4,181)
Fair Value 105,701 131,961
Mortgage-backed Securities [Member]    
Schedule of Available-for-sale Securities [Line Items]    
Amortized Cost 173,176 150,081
Gross Unrealized Gains 186 1,034
Gross Unrealized Losses (8,656) (7,733)
Fair Value 164,706 143,382
State and Local Governments [Member]    
Schedule of Available-for-sale Securities [Line Items]    
Amortized Cost 57,860 59,025
Gross Unrealized Gains 28 71
Gross Unrealized Losses (2,581) (2,220)
Fair Value $ 55,307 $ 56,876