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Investment Securities - Summary of Investments Classified by Contractual Maturity Date (Detail) $ in Thousands | Mar. 31, 2020 USD ($)
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Schedule Of Investments [Abstract] |
Securities Available for Sale, Amortized Cost, Due after one year through five years | $ 2,000
Securities Available for Sale, Amortized Cost, Due after five years through ten years | 19,682
Securities Available for Sale, Amortized Cost, Due after ten years | 77,327
Securities Available for Sale, Amortized Cost, Total | 99,009
Securities Available for Sale, Fair Value, Due after one year through five years | 1,969
Securities Available for Sale, Fair Value, Due after five years through ten years | 17,648
Securities Available for Sale, Fair Value, Due after ten years | 79,315
Securities Available for Sale, Fair Value, Total | 98,932
Securities Held to Maturity, Amortized Cost, Due in one year or less | 451
Securities Held to Maturity, Amortized Cost, Due after one year through five years | 1,627
Securities Held to Maturity, Amortized Cost, Due after five years through ten years | 3,763
Securities Held to Maturity, Amortized Cost, Due after ten years | 5,378
Securities Held to Maturity, Amortized Cost, Total | 11,219
Securities Held to Maturity, Fair Value, Due in one year or less | 453
Securities Held to Maturity, Fair Value, Due after one year through five years | 1,677
Securities Held to Maturity, Fair Value, Due after five years through ten years | 4,026
Securities Held to Maturity, Fair Value, Due after ten years | 5,559
Securities Held to Maturity, Fair Value, Total | $ 11,715

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