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Leases (Schedule of Supplemental Balance Sheet Information Related to Leases) (Details) - USD ($) $ in Thousands | Jun. 30, 2019 | Dec. 31, 2018
--- | --- | ---
Operating leases |  |
Right of use assets included in Other assets | $ 14,443 |
Total operating lease liabilities | 14,491 |
Finance lease |  |
Right of use assets included in Property, plant and equipment, net | 10,472 |
Total finance lease liabilities | 19,487 | $ 25,900
Accrued liabilities [Member] |  |
Operating leases |  |
Operating lease liabilities current | 3,854 |
Finance lease |  |
Finance lease liabilities current | 1,252 |
Other Noncurrent Liabilities [Member] |  |
Operating leases |  |
Operating lease liabilities noncurrent | 10,637 |
Finance lease |  |
Finance lease liabilities noncurrent | $ 18,235 |

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