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Fair Value of Financial Instruments and Fair Value Measurements - Assets and Liabilities Measured at Fair Value on a Recurring and Nonrecurring Basis (Details) - USD ($) $ in Thousands | Sep. 30, 2020 | Dec. 31, 2019
--- | --- | ---
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Recurring Securities Available for Sale | $ 363,601 | $ 347,332
Level 1 |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Recurring Securities Available for Sale | 0 | 0
Level 2 |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Recurring Securities Available for Sale | 361,599 | 345,310
Level 3 |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Recurring Securities Available for Sale | 2,002 | 2,022
U.S. treasury securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Recurring Securities Available for Sale | 245 |
State, county & municipal securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Recurring Securities Available for Sale | 38,906 | 5,115
Corporate Debt securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Recurring Securities Available for Sale | 3,753 | 2,806
Mortgage-backed securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Recurring Securities Available for Sale | 320,697 | 339,411
Recurring Securities Available for Sale |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Recurring Securities Available for Sale | 363,601 | 347,332
Recurring Securities Available for Sale | Level 1 |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Recurring Securities Available for Sale | 0 | 0
Recurring Securities Available for Sale | Level 2 |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Recurring Securities Available for Sale | 361,599 | 345,310
Recurring Securities Available for Sale | Level 3 |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Recurring Securities Available for Sale | 2,002 | 2,022
Recurring Securities Available for Sale | U.S. treasury securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Recurring Securities Available for Sale | 245 |
Recurring Securities Available for Sale | U.S. treasury securities | Level 1 |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Recurring Securities Available for Sale | 0 |
Recurring Securities Available for Sale | U.S. treasury securities | Level 2 |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Recurring Securities Available for Sale | 245 |
Recurring Securities Available for Sale | U.S. treasury securities | Level 3 |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Recurring Securities Available for Sale | 0 |
Recurring Securities Available for Sale | State, county & municipal securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Recurring Securities Available for Sale | 38,906 | 5,115
Recurring Securities Available for Sale | State, county & municipal securities | Level 1 |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Recurring Securities Available for Sale | 0 | 0
Recurring Securities Available for Sale | State, county & municipal securities | Level 2 |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Recurring Securities Available for Sale | 38,906 | 5,115
Recurring Securities Available for Sale | State, county & municipal securities | Level 3 |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Recurring Securities Available for Sale | 0 | 0
Recurring Securities Available for Sale | Corporate Debt securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Recurring Securities Available for Sale | 3,753 | 2,806
Recurring Securities Available for Sale | Corporate Debt securities | Level 1 |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Recurring Securities Available for Sale | 0 | 0
Recurring Securities Available for Sale | Corporate Debt securities | Level 2 |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Recurring Securities Available for Sale | 1,751 | 784
Recurring Securities Available for Sale | Corporate Debt securities | Level 3 |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Recurring Securities Available for Sale | 2,002 | 2,022
Recurring Securities Available for Sale | Mortgage-backed securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Recurring Securities Available for Sale | 320,697 | 339,411
Recurring Securities Available for Sale | Mortgage-backed securities | Level 1 |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Recurring Securities Available for Sale | 0 | 0
Recurring Securities Available for Sale | Mortgage-backed securities | Level 2 |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Recurring Securities Available for Sale | 320,697 | 339,411
Recurring Securities Available for Sale | Mortgage-backed securities | Level 3 |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Recurring Securities Available for Sale | 0 | 0
Nonrecurring |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Collateral Dependent Impaired Loans | 2,178 | 5,985
Other Real Estate | 1,875 | 1,320
Total nonrecurring assets | 4,053 | 7,305
Nonrecurring | Level 1 |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Collateral Dependent Impaired Loans | 0 | 0
Other Real Estate | 0 | 0
Total nonrecurring assets | 0 | 0
Nonrecurring | Level 2 |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Collateral Dependent Impaired Loans | 0 | 0
Other Real Estate | 0 | 0
Total nonrecurring assets | 0 | 0
Nonrecurring | Level 3 |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Collateral Dependent Impaired Loans | 2,178 | 5,985
Other Real Estate | 1,875 | 1,320
Total nonrecurring assets | $ 4,053 | $ 7,305

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