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Securities Held-to-Maturity - Schedule of Unrealized Losses, Gains and Fair Value of Securities Held-to-Maturity (Detail) - USD ($)
$ in Thousands
Mar. 31, 2023
Dec. 31, 2022
Investments, Debt and Equity Securities [Abstract]    
Held-to-maturity cost or amortized cost $ 253 $ 259
Held-to-maturity gross unrealized losses (17) (20)
Held-to-maturity gross unrealized gains 0 0
Held-to-maturity fair value $ 236 $ 239