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Significant Accounting Policies and Basis of Presentation - Narrative (Details) - USD ($) $ in Thousands | Jan. 01, 2020 | Mar. 31, 2020 | Dec. 31, 2019
--- | --- | --- | ---
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |
Retained earnings |  | $ 319,529 | $ 381,519
Deferred taxes |  |  | 11,740
Accrued interest receivable |  | 40,570 | $ 38,072
Available-for-sale Securities |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |
Accrued interest receivable |  | $ 4,700 |
Accounting Standards Update 2016-13 |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |
Initial allowance on loans purchased with credit deterioration | $ 200 |  |
Financing receivable, purchased with credit deterioration, discount | 300 |  |
Cumulative Effect, Period of Adoption, Adjustment |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |
Retained earnings | (61,475) |  |
Deferred taxes | $ (21,510) |  |

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