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Fair Value Disclosures - Assets and Liabilities Measured on Recurring Basis (Details) - USD ($) $ in Thousands | Mar. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Securities available-for-sale, at fair value | $ 201,002 | $ 178,348
Significant Other Observable Inputs (Level 2) [Member] |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Securities available-for-sale, at fair value | 201,002 | 178,348
Derivative financial instruments | 6,885 | 3,446
U.S. Government-sponsored enterprises (GSEs) [Member] |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Securities available-for-sale, at fair value | 17,045 | 19,000
Municipal securities [Member] |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Securities available-for-sale, at fair value | 83,317 | 64,391
Other debt securities [Member] |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Securities available-for-sale, at fair value | 5,462 | 3,470
Fair Value, Recurring [Member] |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Securities available-for-sale, at fair value | 201,002 | 178,348
Derivative financial instruments | 6,885 | 3,446
Fair Value, Recurring [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Securities available-for-sale, at fair value | 0 | 0
Derivative financial instruments | 0 | 0
Fair Value, Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member] |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Securities available-for-sale, at fair value | 201,002 | 178,348
Derivative financial instruments | 6,885 | 3,446
Fair Value, Recurring [Member] | Significant Other Unobservable Inputs (Level 3) [Member] |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Securities available-for-sale, at fair value | 0 | 0
Derivative financial instruments | 0 | 0
Fair Value, Recurring [Member] | U.S. Government-sponsored enterprises (GSEs) [Member] |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Securities available-for-sale, at fair value | 17,045 | 19,000
Fair Value, Recurring [Member] | U.S. Government-sponsored enterprises (GSEs) [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Securities available-for-sale, at fair value | 0 | 0
Fair Value, Recurring [Member] | U.S. Government-sponsored enterprises (GSEs) [Member] | Significant Other Observable Inputs (Level 2) [Member] |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Securities available-for-sale, at fair value | 17,045 | 19,000
Fair Value, Recurring [Member] | U.S. Government-sponsored enterprises (GSEs) [Member] | Significant Other Unobservable Inputs (Level 3) [Member] |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Securities available-for-sale, at fair value | 0 | 0
Fair Value, Recurring [Member] | Municipal securities [Member] |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Securities available-for-sale, at fair value | 83,317 | 64,391
Fair Value, Recurring [Member] | Municipal securities [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Securities available-for-sale, at fair value | 0 | 0
Fair Value, Recurring [Member] | Municipal securities [Member] | Significant Other Observable Inputs (Level 2) [Member] |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Securities available-for-sale, at fair value | 83,317 | 64,391
Fair Value, Recurring [Member] | Municipal securities [Member] | Significant Other Unobservable Inputs (Level 3) [Member] |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Securities available-for-sale, at fair value | 0 | 0
Fair Value, Recurring [Member] | Other debt securities [Member] |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Securities available-for-sale, at fair value | 5,462 | 3,470
Fair Value, Recurring [Member] | Other debt securities [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Securities available-for-sale, at fair value | 0 | 0
Fair Value, Recurring [Member] | Other debt securities [Member] | Significant Other Observable Inputs (Level 2) [Member] |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Securities available-for-sale, at fair value | 5,462 | 3,470
Fair Value, Recurring [Member] | Other debt securities [Member] | Significant Other Unobservable Inputs (Level 3) [Member] |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Securities available-for-sale, at fair value | 0 | 0
Fair Value, Recurring [Member] | Mortgage-backed securities [Member] |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Securities available-for-sale, at fair value | 95,178 | 91,487
Fair Value, Recurring [Member] | Mortgage-backed securities [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Securities available-for-sale, at fair value | 0 | 0
Fair Value, Recurring [Member] | Mortgage-backed securities [Member] | Significant Other Observable Inputs (Level 2) [Member] |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Securities available-for-sale, at fair value | 95,178 | 91,487
Fair Value, Recurring [Member] | Mortgage-backed securities [Member] | Significant Other Unobservable Inputs (Level 3) [Member] |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Securities available-for-sale, at fair value | $ 0 | $ 0

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