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Investment Securities and Other Investments - Summary of Amortized Cost and Fair Values of Investment Securities (Detail) - USD ($) $ in Thousands | Dec. 31, 2019 | Dec. 31, 2018
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Schedule Of Available For Sale And Held To Maturity Securities [Line Items] |  |
Available for sale, Amortized Cost | $ 108,037 | $ 38,828
Available for sale, Gross Unrealized Gains | 741 | 103
Available for sale, Gross Unrealized Losses | 207 | 884
Available for sale, Fair Value | 108,571 | 38,047
Held to maturity, Amortized Cost | 12,192 | 15,565
Held to maturity, Fair Value | 12,654 | 15,503
Investment Securities, Amortized Cost | 120,229 | 54,393
Investment Securities, Gross Unrealized Gains | 1,205 | 181
Investment Securities, Gross Unrealized Losses | 209 | 1,024
Investment Securities, Fair Value | 121,225 | 53,550
State and Municipal [Member] |  |
Schedule Of Available For Sale And Held To Maturity Securities [Line Items] |  |
Available for sale, Amortized Cost |  | 1,000
Available for sale, Gross Unrealized Gains |  | 3
Available for sale, Fair Value |  | 1,003
Held to maturity, Amortized Cost | 12,192 | 15,565
Held to maturity, Gross Unrealized Gains | 464 | 78
Held to maturity, Gross Unrealized Losses | 2 | 140
Held to maturity, Fair Value | 12,654 | 15,503
U.S. Treasury and Agencies [Member] |  |
Schedule Of Available For Sale And Held To Maturity Securities [Line Items] |  |
Available for sale, Amortized Cost | 2,500 | 3,375
Available for sale, Gross Unrealized Losses | 51 | 208
Available for sale, Fair Value | 2,449 | 3,167
Mortgage Backed Securities [Member] |  |
Schedule Of Available For Sale And Held To Maturity Securities [Line Items] |  |
Available for sale, Amortized Cost | 94,983 | 28,976
Available for sale, Gross Unrealized Gains | 654 | 22
Available for sale, Gross Unrealized Losses | 152 | 628
Available for sale, Fair Value | 95,485 | 28,370
Corporate Bonds [Member] |  |
Schedule Of Available For Sale And Held To Maturity Securities [Line Items] |  |
Available for sale, Amortized Cost | 10,554 | 5,477
Available for sale, Gross Unrealized Gains | 87 | 78
Available for sale, Gross Unrealized Losses | 4 | 48
Available for sale, Fair Value | $ 10,637 | $ 5,507

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