Income Taxes - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Income Tax Contingency [Line Items]
Federal statutory tax rate	21.00%	21.00%	21.00%
Deferred tax amounts, valuation allowance recorded	$ 0	$ 0
Uncertain tax positions	0	0
Contribution of Property	3,925,000	615,000
Initial contribution included in other assets	3,925,000	615,000
Additional Contribution	7,000,000
Leveraged loan, invest in other borrowings				$ 21,053,000
Maximum [Member]
Income Tax Contingency [Line Items]
Contribution of Property	5,500,000
Initial contribution included in other assets	$ 5,500,000
NMTC investments [Member]
Income Tax Contingency [Line Items]
Tax Cuts and Jobs Act, Measurement Period Adjustment, Increase (Decrease) in Effective Tax Rate	39.00%
Investments in other assets	$ 24,433,000	25,738,000
FFB Paris Investment Fund, LLC [Member]
Income Tax Contingency [Line Items]
Loan investment	18,000,000	18,000,000
Leveraged loan, invest in other borrowings	$ 21,053,000	$ 21,053,000