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Leases
 12 Months Ended
Dec. 31, 2020
Leases [Abstract]  
Leases Leases 
We lease coal rail cars, warehouse and office space, land and certain office, manufacturing and material handling equipment under varying terms and conditions. All leases are classified as operating leases.
The components of lease cost and lease cash flows for the years ended December 31, 2020 and 2019 are as follows:
(in thousands)20202019
Lease Cost
Operating Lease Cost$5,837 $5,371 
Variable Lease Cost1,166 1,068 
Total Lease Cost$7,003 $6,439 
Lease Cash Flows
Operating Cash Flows from Operating Leases$5,431 $4,893 
A summary of operating lease right-of-use lease assets and lease liabilities as of December 31, 2020 and 2019 is as follows: 
(in thousands)20202019
Right of Use Lease Assets1
$19,114 $21,851 
Lease Liabilities
Current2
4,479 4,136 
Long-Term3
15,314 18,193 
Total Lease Liabilities$19,793 $22,329 
1Included in Other Noncurrent Assets in the consolidated balance sheets.
2Included in Other Current Liabilities in the consolidated balance sheets.
3Included in Other Noncurrent Liabilities in the consolidated balance sheets.
Operating lease assets obtained in exchange for new operating liabilities amounted to $1.4 million and $6.3 million for the years ended December 31, 2020 and 2019.
Maturities of lease liabilities as of December 31, 2020 for each of the next five years and in the aggregate thereafter are as follows:
(in thousands)Operating Leases
2021$5,387 
20224,282 
20233,905 
20243,376 
20252,545 
Thereafter3,301 
Total Lease Payments$22,796 
Less: Interest3,003 
Present Value of Lease Liabilities$19,793 
The weighted-average remaining lease term and the weighted-average discount rate as of December 31, 2020 and 2019 are as follows:
20202019
Weighted-Average Remaining Lease Term (in years)5.36.0
Weighted-Average Discount Rate5.45 %5.30 %
Prior to adopting new lease accounting guidance on January 1, 2019, we accounted for operating leases by recognizing lease cost on a straight-line basis over the lease term. Lease expense for the year ended December 31, 2018 was $6.3 million.