v3.26.1
Securities - Summary of Securities Available-for-Sale and Restricted Stock (Detail) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Mar. 31, 2026
Dec. 31, 2025
Schedule of Trading Securities and Other Trading Assets [Line Items]    
Amortized Cost, Available-for-sale $ 134,523 $ 137,377
Gross Unrealized Gains, Available-for-sale 125 307
Gross Unrealized Losses, Available-for-sale (5,817) (5,467)
Fair Value, Available-for-sale 128,831 132,217
Amortized Cost, Held-to-maturity 179,155 183,145
Gross Unrealized Gains, Held-to-maturity   32
Gross Unrealized Losses, Held-to-maturity (22,692) (22,125)
Fair Value, Held-to-maturity 156,463 161,052
Amortized Cost 315,508 322,352
Gross Unrealized Gains 242 433
Gross Unrealized Losses (28,509) (27,592)
Fair Value 287,241 295,193
U.S. Treasury Securities [Member]    
Schedule of Trading Securities and Other Trading Assets [Line Items]    
Amortized Cost, Available-for-sale 6,011 5,010
Gross Unrealized Gains, Available-for-sale 1 10
Gross Unrealized Losses, Available-for-sale (2)  
Fair Value, Available-for-sale 6,010 5,020
Amortized Cost, Held-to-maturity 5,404 5,397
Gross Unrealized Losses, Held-to-maturity (324) (321)
Fair Value, Held-to-maturity 5,080 5,076
U.S. Government Agencies [Member]    
Schedule of Trading Securities and Other Trading Assets [Line Items]    
Amortized Cost, Available-for-sale 3,000 3,000
Gross Unrealized Losses, Available-for-sale (76) (92)
Fair Value, Available-for-sale 2,924 2,908
Mortgage-Backed Securities of Government Agencies [Member]    
Schedule of Trading Securities and Other Trading Assets [Line Items]    
Amortized Cost, Available-for-sale 99,359 103,198
Gross Unrealized Gains, Available-for-sale 117 290
Gross Unrealized Losses, Available-for-sale (4,894) (4,579)
Fair Value, Available-for-sale 94,582 98,909
Amortized Cost, Held-to-maturity 171,272 175,261
Gross Unrealized Gains, Held-to-maturity   32
Gross Unrealized Losses, Held-to-maturity (22,251) (21,717)
Fair Value, Held-to-maturity 149,021 153,576
Asset-Backed Securities of Government Agencies [Member]    
Schedule of Trading Securities and Other Trading Assets [Line Items]    
Amortized Cost, Available-for-sale 342 355
Gross Unrealized Losses, Available-for-sale (8) (8)
Fair Value, Available-for-sale 334 347
State and Political Subdivisions [Member]    
Schedule of Trading Securities and Other Trading Assets [Line Items]    
Amortized Cost, Available-for-sale 11,651 11,660
Gross Unrealized Gains, Available-for-sale 1  
Gross Unrealized Losses, Available-for-sale (491) (433)
Fair Value, Available-for-sale 11,161 11,227
Amortized Cost, Held-to-maturity 2,479 2,487
Gross Unrealized Losses, Held-to-maturity (117) (87)
Fair Value, Held-to-maturity 2,362 2,400
Corporate Bonds [Member]    
Schedule of Trading Securities and Other Trading Assets [Line Items]    
Amortized Cost, Available-for-sale 14,160 14,154
Gross Unrealized Gains, Available-for-sale 6 7
Gross Unrealized Losses, Available-for-sale (346) (355)
Fair Value, Available-for-sale 13,820 13,806
Equity Securities [Member]    
Schedule of Trading Securities and Other Trading Assets [Line Items]    
Amortized Cost, Equity securities 185 185
Gross Unrealized Gains, Equity securities 117 94
Fair Value, Equity securities 302 279
Restricted Stock [Member]    
Schedule of Trading Securities and Other Trading Assets [Line Items]    
Amortized Cost 1,645 1,645
Fair Value $ 1,645 $ 1,645