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Nature of Operations and Summary of Significant Accounting Policies - Recent Accounting Changes (Details) - USD ($) $ in Thousands | Jan. 01, 2020 | Dec. 31, 2019 | Jan. 01, 2019
--- | --- | --- | ---
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |
Operating lease assets |  | $ 20,747 |
Operating lease liabilities |  | $ 21,421 |
ASU 2016-02 |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |
Operating lease assets |  |  | $ 23,300
Operating lease liabilities |  |  | $ 23,800
Minimum | Forecast | ASU 2016-13 |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |
Increase in Allowance, Percent | 55.00% |  |
Maximum | Forecast | ASU 2016-13 |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |
Increase in Allowance, Percent | 65.00% |  |
Unfunded dommitment | Forecast | ASU 2016-13 |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |
Reserve for potential losses from unfunded commitments | $ 18,000 |  |

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