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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