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Debt Securities - Amortized Cost, Gross Unrealized Gains and Losses (Detail) - USD ($)
$ in Thousands
Dec. 31, 2022
Dec. 31, 2021
Available-for-sale Securities, Debt Maturities [Abstract]    
Amortized cost, after 1 to 5 years $ 2,194 $ 2,963
Gross unrealized gains, after 1 to 5 years 9 78
Gross unrealized losses, after 1 to 5 years 0 0
Fair Value, after 1 to 5 years $ 2,203 $ 3,041