Fair Values of Assets and Liabilities - Schedule of Assets Measured on Nonrecurring Basis (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total Assets	$ 1,069,838	$ 1,241,183
Fair Value, Nonrecurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	81,920	53,491
Fair Value Measurement Of Assets On Nonrecurring Basis Net Losses On Impaired Loans	(18,677)	(16,287)
Other Real Estate Owned Assets Fair Value	1,014	1,215
Fair Value Measurement Of Assets On Nonrecurring Basis Net Losses On Other Real Estate Owned	(284)	(29)
Total Assets	308,315	54,934
Fair Value Measurement Of Assets On Nonrecurring Basis Net Loss	(18,961)	(16,316)
Loans Held for Sale LOCOM	225,381	228
Gain (loss) on sale of impaired loans	0	0
Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total Assets	0	0
Level 1 [Member] | Fair Value, Nonrecurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	0	0
Other Real Estate Owned Assets Fair Value	0	0
Total Assets	0	0
Loans Held for Sale LOCOM	0	0
Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total Assets	1,069,838	1,241,183
Fair Value, Inputs, Level 2 [Member] | Fair Value, Nonrecurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	40,617	39,407
Other Real Estate Owned Assets Fair Value	1,014	1,215
Total Assets	267,012	40,850
Loans Held for Sale LOCOM	225,381	228
Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total Assets	0	0
Level 3 [Member] | Fair Value, Nonrecurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	41,303	14,084
Other Real Estate Owned Assets Fair Value	0	0
Total Assets	41,303	14,084
Loans Held for Sale LOCOM	$ 0	$ 0