Summary of Significant Accounting Policies (Narrative) (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cash collateral on deposit	$ 8,600	$ 3,200
Foreclosed assets	725	1,000
Real Estate Owned, Valuation Allowance, Provision	$ 0	$ 0	$ 14
Amount of significant concentrations of any properties with write downs from any single geographic region	0.00%	0.00%	0.00%
Minimum [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Range of change in fair value of derivative hedging instrument to be considered highly effective	80.00%
Maximum [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Range of change in fair value of derivative hedging instrument to be considered highly effective	125.00%