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Income Taxes - Narrative (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Dec. 31, 2017 | Dec. 31, 2018 | Dec. 31, 2017 | Jan. 01, 2017
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |
Deferred tax not recongized | $ 14,900 | $ 14,900 | $ 14,900 |
Deferred Tax Assets, Net | 12,563 | 6,235 | 12,563 |
Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Amount | 2,500 | $ 0 | 2,487 |
Reclassification for the Tax Cuts and Jobs Act |  |  |  | $ 0
Retained Earnings |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |
Reclassification for the Tax Cuts and Jobs Act |  |  |  | (60)
Retained Earnings | Accounting Standards Update 2018-02 |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |
Reclassification for the Tax Cuts and Jobs Act | (60,000) |  | (60,000) |
Accumulated Other Comprehensive Income (Loss) |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |
Reclassification for the Tax Cuts and Jobs Act |  |  |  | $ 60
Accumulated Other Comprehensive Income (Loss) | Accounting Standards Update 2018-02 |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |
Reclassification for the Tax Cuts and Jobs Act | $ 60,000 |  | $ 60,000 |

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