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Investment Securities - Additional Information (Details) | 3 Months Ended |
--- | --- | ---
Mar. 31, 2020 USD ($) Security | Dec. 31, 2019 USD ($) Security
Held-to-maturity Securities [Abstract] |  |
Number of securities in unrealized loss positions, twelve months or more | Security | 2 | 3
Held to maturity sale securities aggregate market value | $ 811,000 | $ 1,330,000
Held-to-maturity securities unrealized aggregate loss | 40,000 | 7,000
Gain (Loss) on Sale of Investments [Abstract] |  |
Securities pledged to collateralize deposit | 113,500,000 | 92,400,000
Securities pledged to collateralize borrowing | $ 25,600,000 | $ 21,300,000
Municipal Securities [Member] |  |
Schedule of Available-for-sale Securities and Held-to-Maturity Securities [Line Items] |  |
Months of unrealized loss positions | 12 months |
Fixed Rate, Private-label Asset-backed Security Rated [Member] |  |
Available-for-sale Securities, Amortized Cost Basis [Abstract] |  |
Number of securities in unrealized loss positions, twelve months or more | Security | 1 |
Available for sale securities continuous unrealized loss position twelve months or more amortized historical cost basis | $ 381,000 |
Available for sale securities aggregate market value | 367,000 |
Available for sale securities unrealized aggregate loss | $ 14,000 |
Available for sale securities unrealized aggregate loss percentage | 3.80% |
Fixed Rate, Private-label Mortgage-backed Security not Rated [Member] |  |
Available-for-sale Securities, Amortized Cost Basis [Abstract] |  |
Number of securities in unrealized loss positions, twelve months or more | Security | 4 |
Available for sale securities continuous unrealized loss position twelve months or more amortized historical cost basis | $ 4,700,000 |
Available for sale securities aggregate market value | 4,300,000 |
Available for sale securities unrealized aggregate loss | $ 355,000 |
Available for sale securities unrealized aggregate loss percentage | 8.20% |
Held-to-maturity Securities [Abstract] |  |
Number of securities in unrealized loss positions, twelve months or more | Security | 2 |
Held to maturity securities continuous unrealized loss position greater than twelve months amortized historical cost basis | $ 851,000 |
Held to maturity sale securities aggregate market value | 811,000 |
Held-to-maturity securities unrealized aggregate loss | $ 40,000 |
Held-to-maturity securities unrealized aggregate loss percentage | 4.90% |

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