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Accounting Pronouncements (Details) - USD ($) $ in Thousands | Jan. 01, 2019 | Dec. 31, 2018 | Dec. 31, 2017
--- | --- | --- | ---
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |
Identifiable assets |  | $ 721,633 | $ 639,671
Current liabilities |  | $ 100,852 | $ 101,363
Accounting Standards Update 2016-02 | Subsequent Event | Forecast |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |
Identifiable assets | $ 8,000 |  |

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