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Leases - Supplemental Balance Sheet Information (Details) - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Operating Leases |  |
Other non-current assets | $ 14,144 | $ 12,858
Accrued liabilities | 3,680 | 3,972
Other long-term liabilities | 10,565 | 8,989
Total operating lease liabilities | $ 14,245 | $ 12,961
Accrued liabilities | us-gaap:AccruedLiabilitiesCurrent | us-gaap:AccruedLiabilitiesCurrent
Other long-term liabilities | us-gaap:OtherLiabilitiesNoncurrent | us-gaap:OtherLiabilitiesNoncurrent
Finance Leases |  |
Property, plant and equipment, gross | $ 331 | $ 524
Accumulated Depreciation | (211) | (265)
Property, plant and equipment, net | 120 | 259
Current maturities of long-term debt and finance lease obligations | 66 | 90
Long-term debt and finance lease obligations, net of current maturities | 87 | 174
Total finance lease liabilities | $ 153 | $ 264
Long-term debt and finance lease obligations, net of current maturities | us-gaap:LongTermDebtAndCapitalLeaseObligations | us-gaap:LongTermDebtAndCapitalLeaseObligations
Operating leases, weighted average remaining lease term | 5 years 9 months 29 days | 5 years 1 month 6 days
Finance leases, weighted average remaining lease term | 2 years 7 months 13 days | 3 years 5 months 19 days
Operating leases, weighted average remaining discount rate | 3.04% | 3.29%
Finance leases, weighted average remaining discount rate | 3.38% | 3.39%
Other non-current assets | us-gaap:OtherAssetsNoncurrent | us-gaap:OtherAssetsNoncurrent
Property, plant and equipment, net | us-gaap:PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization | us-gaap:PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization
Current maturities of long-term debt and finance lease obligations | us-gaap:LongTermDebtAndCapitalLeaseObligationsCurrent | us-gaap:LongTermDebtAndCapitalLeaseObligationsCurrent

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