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Leases (Schedule of Leased Assets and Liabilities) (Details) - USD ($) $ in Thousands | Jun. 30, 2020 | Dec. 31, 2019
--- | --- | ---
Assets |  |
Operating lease, assets | $ 10,748 | $ 11,398
Finance lease, assets | 98 | 544
Current liabilities |  |
Operating lease liabilities, current | 1,308 | 1,318
Finance lease liabilities, current | 33 | 558
Liabilities, Noncurrent |  |
Operating lease liabilities, noncurrent | 11,782 | 12,448
Finance lease liabilities, noncurrent | 68 | 85
Finance lease, accumulated amortization | $ 100 | $ 1,900
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List] | us-gaap:PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization |
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List] | us-gaap:OtherLiabilitiesCurrent |
Finance Lease, Liability, Current, Statement of Financial Position [Extensible List] | us-gaap:LongTermDebtCurrent |
Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List] | us-gaap:LongTermDebtNoncurrent |

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