v3.26.1
Accumulated Other Comprehensive Loss - Schedule of Changes in Accumulated Other Comprehensive Loss by Component Net of Tax (Detail) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Accumulated Other Comprehensive Loss [Line Items]    
Unrealized holding gain on available-for-sale securities arising during the period, Pretax $ (532) $ 1,565
Balance at beginning of period 126,280 114,835
Other comprehensive (loss) income (392) 1,269
Balance at end of period 129,203 118,335
Accumulated Net Unrealized Investment Gain (Loss) [Member]    
Accumulated Other Comprehensive Loss [Line Items]    
Beginning balance, Pretax (6,350) (10,657)
Unrealized holding gain on available-for-sale securities arising during the period, Pretax (532) 1,565
Amortization of held-to-maturity discount resulting from transfer, Pretax 36 40
Total other comprehensive income, Pretax (496) 1,605
Ending balance, Pretax (6,846) (9,052)
Beginning balance, Tax Effect 1,333 2,237
Unrealized holding gain on available-for-sale securities arising during the period, Tax Effect 112 (328)
Amortization of held-to-maturity discount resulting from transfer, Tax Effect (8) (8)
Total other comprehensive income, Tax Effect 104 (336)
Ending Balance, Tax Effect 1,437 1,901
Balance at beginning of period (5,017) (8,420)
Unrealized holding gain on available-for-sale securities arising during the period, After-Tax (420) 1,237
Amortization of held-to-maturity discount resulting from transfer, After-tax 28 32
Other comprehensive (loss) income (392) 1,269
Balance at end of period $ (5,409) $ (7,151)