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Leases (Tables)
 12 Months Ended
Dec. 31, 2020
Leases [Abstract]  
Components of Lease Expense As of December 31, 2020, the components of lease cost were as follows:
Components of Lease Cost
Twelve Months Ended December 31,
(in thousands)20202019
Finance lease cost:
Amortization of right-of-use assets$89 $125 
Interest on lease liabilities7 10 
Operating lease cost4,824 4,457 
Short-term lease cost818 594 
Variable lease cost487 464 
Total lease cost$6,225 $5,650 
Operating Lease Maturity
As of December 31, 2020, future minimum lease payments under these non-cancelable leases are:
Future Minimum Lease Payments
December 31, 2020
  
(in thousands)
Operating
Leases
Finance
Leases
2021$4,072 $69 
20223,063 40 
20232,089 17 
20241,465 17 
20251,244 16 
Thereafter3,622 — 
Total minimum lease payments$15,555 $159 
Less imputed interest(1,310)(6)
Total lease liabilities$14,245 $153 
   
As of December 31, 2019, future minimum lease payments under these non-cancelable leases are:
December 31, 2019
  
(in thousands)
Operating
Leases
Finance
Leases
2020$4,305 $97 
20212,718 83 
20222,051 45 
20231,459 22 
2024941 19 
Thereafter2,587 14 
Total minimum lease payments$14,061 $280 
Less imputed interest(1,100)(16)
Total lease liabilities$12,961 $264 
Finance Lease Maturity
As of December 31, 2020, future minimum lease payments under these non-cancelable leases are:
Future Minimum Lease Payments
December 31, 2020
  
(in thousands)
Operating
Leases
Finance
Leases
2021$4,072 $69 
20223,063 40 
20232,089 17 
20241,465 17 
20251,244 16 
Thereafter3,622 — 
Total minimum lease payments$15,555 $159 
Less imputed interest(1,310)(6)
Total lease liabilities$14,245 $153 
   
As of December 31, 2019, future minimum lease payments under these non-cancelable leases are:
December 31, 2019
  
(in thousands)
Operating
Leases
Finance
Leases
2020$4,305 $97 
20212,718 83 
20222,051 45 
20231,459 22 
2024941 19 
Thereafter2,587 14 
Total minimum lease payments$14,061 $280 
Less imputed interest(1,100)(16)
Total lease liabilities$12,961 $264 
Supplemental Balance Sheet Information Related to Leases
Supplemental balance sheet information related to leases was as follows:
Operating Leases
December 31,
(in thousands)20202019
Other non-current assets
$14,144 $12,858 
Accrued liabilities3,680 3,972 
Other long-term liabilities10,565 8,989 
Total operating lease liabilities$14,245 $12,961 


Finance Leases
December 31,
(in thousands)20202019
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 maturities87 174 
Total finance lease liabilities$153 $264 
Weighted Average Remaining Lease Term
Operating leases5.83 years5.10 years
Finance leases2.62 years3.47 years
Weighted Average Discount Rate
Operating leases3.04 %3.29 %
Finance leases3.38 %3.39 %
Supplemental Cash Flow Information Related to Leases
Supplemental Cash Flow information related to leases was as follows:
Twelve Months Ended December 31,
(in thousands)20202019
Cash paid for amounts included in the measurement of lease liabilities:
     Operating cash flows from finance leases$6 $10 
     Operating cash flows from operating leases 4,487 4,507 
     Financing cash flows from finance leases88 122