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Pension (Narrative) (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Jun. 30, 2019 | Jun. 30, 2018 | Jun. 30, 2019 | Jun. 30, 2018 | Dec. 31, 2018
Pension [Abstract] |  |  |  |  |
Expected pension expense | $ 420 |  | $ 420 |  |
Pension Contributions |  |  |  | $ 1,000 |
Pension expense | $ 100 | $ 125 | $ 220 | $ 250 | $ 500

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