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Leases (Schedule of Supplemental Balance Sheet Information Related to Leases) (Details) - USD ($) $ in Thousands | Mar. 31, 2019 | Dec. 31, 2018
--- | --- | ---
Operating leases |  |
Right of use assets included in Other assets | $ 12,969 |
Total operating lease liabilities | 13,117 |
Finance lease |  |
Right of use assets included in Property, plant and equipment, net | 10,890 |
Total finance lease liabilities | 19,780 | $ 25,900
Accrued liabilities [Member] |  |
Operating leases |  |
Total operating lease liabilities | 4,182 |
Finance lease |  |
Total finance lease liabilities | 1,216 |
Other Noncurrent Liabilities [Member] |  |
Operating leases |  |
Total operating lease liabilities | 8,935 |
Finance lease |  |
Total finance lease liabilities | $ 18,564 |

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