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Securities - Summary of Amortized Cost and Fair Value of Debt Securities (Detail) - USD ($)
$ in Thousands
Mar. 31, 2020
Dec. 31, 2019
Available-for-sale    
Due in one year or less, Amortized Cost $ 5,285  
Due after one through five years, Amortized Cost 11,542  
Due after five through ten years, Amortized Cost 18,308  
Due after ten years, Amortized Cost 72,316  
Amortized Cost, Available-for-sale 107,451 $ 111,874
Due in one year or less, Fair Value 5,283  
Due after one through five years, Fair Value 11,649  
Due after five through ten years, Fair Value 18,465  
Due after ten years, Fair Value 72,866  
Total debt securities available-for-sale, Fair Value 108,263 112,146
Held-to-maturity    
Due after one through five years, Amortized Cost 3,000  
Due after ten years, Amortized Cost 8,242  
Amortized Cost, Held to maturity 11,242 13,869
Due after one through five years, Fair Value 3,008  
Due after ten years, Fair Value 8,534  
Total debt securities held-to-maturity, Fair Value $ 11,542 $ 13,950