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Leases - Balance Sheet Location (Details) - USD ($) $ in Thousands | Jun. 30, 2019 | Dec. 31, 2018
--- | --- | ---
Operating leases |  |
Operating lease right of use assets | $ 13,235 |
Operating lease liability, current | 3,334 |
Operating lease liability, noncurrent | 9,901 | $ 0
Total operating lease liabilities | 13,235 |
Finance leases |  |
Property, plant, and equipment | 3,626 |
Accumulated amortization | (2,834) |
Property, plant, and equipment - net | 792 |
Finance lease liability, current | 642 |
Finance lease liability, noncurrent | 150 |
Total finance lease liabilities | $ 792 |

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