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(Tables)
 12 Months Ended
Dec. 31, 2020
Leases [Abstract]  
Components of Lease Expense
Our lease obligations consist of operating and finance leases related to real estate and equipment. The components of lease cost are as follows (in thousands):
Years Ended December 31,
Income Statement Classification20192020
Operating lease cost
Facilities and grounds expense(1)
$3,722 $3,795 
Short-term lease cost
Facilities and grounds expense(1)
277 224 
Finance lease cost:
Depreciation of leased assets
Depreciation and amortization(2)
$498 $439 
Interest on lease liabilitiesInterest expense520 496 
Total finance lease cost1,018 935 
Total lease cost$5,017 $4,954 
(1)
Facilities and grounds expense is included within Cost of service and General, administrative and other on our Consolidated Statements of Operations.

(2)
Depreciation and amortization expense is included within Field depreciation expense and Home office depreciation and amortization on our Consolidated Statements of Operations.
Variable lease expense was immaterial for the years ended December 31, 2019 and 2020.
Supplemental cash flow information related to our leases is as follows (in thousands):
Years Ended December 31,
20192020
Cash paid for operating leases included in operating activities$3,910 $3,383 
Cash paid for finance leases included in financing activities872 828 
Right-of-use assets obtained in exchange for new leases are as follows (in thousands):
Years Ended December 31,
20192020
Right-of-use assets obtained in exchange for new operating lease liabilities(1)
$8,175 $782 
Right-of-use assets obtained in exchange for new finance lease liabilities— — 
(1)
During the year ended December 31, 2019, we modified an existing operating lease to extend the term through 2030. As a result of this modification, we increased our lease liabilities and right-of-use assets by $8.2 million.
Supplemental balance sheet information related to leases is as follows (in thousands):
Lease TypeBalance Sheet ClassificationDecember 31, 2019December 31, 2020
Operating lease right-of-use assetsOperating lease right-of-use assets$22,304 $21,201 
Finance lease right-of-use assetsProperty, plant and equipment, net6,770 6,770 
Accumulated depreciationProperty, plant and equipment, net(1,566)(2,005)
Finance lease right-of-use assets, net$5,204 $4,765 
Operating lease current liabilitiesCurrent portion of operating lease obligations$1,554 $2,082 
Finance lease current liabilitiesCurrent portion of finance lease obligations290 323 
Total current lease liabilities$1,844 $2,405 
Operating lease non-current liabilitiesObligations under operating leases, net of current portion$21,533 $20,302 
Finance lease non-current liabilitiesObligations under finance leases, net of current portion5,854 5,531 
Total non-current lease liabilities$27,387 $25,833 
Total lease liabilities$29,231 $28,238 
The average lease terms and discount rates as of December 31, 2020 are as follows:
Weighted-average remaining lease term (years)Weighted-average discount rate
Operating leases10.78.1 %
Finance leases5.98.2 %
Maturities of Operating Lease Liabilities
The aggregate future lease payments for operating and finance leases as of December 31, 2020 are as follows (in thousands):
OperatingFinance
Lease payments due:
2021$3,794 $836 
20223,422 860 
20233,301 860 
20243,292 791 
20253,156 736 
Thereafter16,188 5,555 
Total lease payments$33,153 $9,638 
Less: Interest(10,769)(3,784)
Present value of lease liabilities$22,384 $5,854 
Maturities of Financing Lease Liabilities
The aggregate future lease payments for operating and finance leases as of December 31, 2020 are as follows (in thousands):
OperatingFinance
Lease payments due:
2021$3,794 $836 
20223,422 860 
20233,301 860 
20243,292 791 
20253,156 736 
Thereafter16,188 5,555 
Total lease payments$33,153 $9,638 
Less: Interest(10,769)(3,784)
Present value of lease liabilities$22,384 $5,854