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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 | Mar. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Recurring Securities Available for Sale | $ 333,085 | $ 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 | 331,068 | 345,310
Level 3 |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Recurring Securities Available for Sale | 2,017 | 2,022
State, county & municipal securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Recurring Securities Available for Sale | 6,410 | 5,115
Corporate Debt securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Recurring Securities Available for Sale | 2,017 | 2,806
Mortgage-backed securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Recurring Securities Available for Sale | 324,658 | 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 | 333,085 |
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 |
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 | 331,068 |
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 | 2,017 | 2,022
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 | 6,410 | 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 | 6,410 | 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 | 2,017 | 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 | 0 | 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 | 2,017 | 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 | 324,658 | 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 | 324,658 | 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 | 4,509 | 5,985
Other Real Estate | 847 | 1,320
Total nonrecurring assets | 5,356 | 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 | 4,509 | 5,985
Other Real Estate | 847 | 1,320
Total nonrecurring assets | $ 5,356 | $ 7,305

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