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Investment Securities and Other Investments - Summary of Investments Classified by Contractual Maturity Date (Detail) $ in Thousands | Dec. 31, 2019 USD ($)
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Schedule Of Investments [Abstract] |
Securities Available for Sale, Amortized Cost, Due after one year through five years | $ 2,500
Securities Available for Sale, Amortized Cost, Due after five years | 18,670
Securities Available for Sale, Amortized Cost, Due after ten years | 86,867
Securities Available for Sale, Amortized Cost, Total | 108,037
Securities Available for Sale, Fair Value, Due after one year through five years | 2,508
Securities Available for Sale, Fair Value, Due after five years | 18,659
Securities Available for Sale, Fair Value, Due after ten years | 87,404
Securities Available for Sale, Fair Value, Total | 108,571
Securities Held to Maturity, Amortized Cost, Due in one year or less | 460
Securities Held to Maturity, Amortized Cost, Due after one year through five years | 2,584
Securities Held to Maturity, Amortized Cost, Due after five years | 3,764
Securities Held to Maturity, Amortized Cost, Due after ten years | 5,384
Securities Held to Maturity, Amortized Cost, Total | 12,192
Securities Held to Maturity, Fair Value, Due in one year or less | 460
Securities Held to Maturity, Fair Value, Due after one year through five years | 2,628
Securities Held to Maturity, Fair Value, Due after five years | 3,913
Securities Held to Maturity, Fair Value, Due after ten years | 5,653
Securities Held to Maturity, Fair Value, Total | $ 12,654

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