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Leases
3 Months Ended
Mar. 31, 2020
Leases [Abstract]  
Leases
NOTE Q— LEASES
We lease railroad cars, office space, mining property, mining/processing equipment and transportation and other equipment. The majority of our leases have remaining lease terms of one year to 20 years. Our lease terms may include options to extend or terminate the lease when it is reasonably certain that we will exercise that option. As most of our leases do not provide an implicit rate, we use our incremental borrowing rate based on the information available at the commencement date in determining the present value of lease payments. We have lease agreements with lease and non-lease components, the latter of which are generally accounted for separately.
Supplemental balance sheet information related to leases was as follows:
Leases
Classification
 
March 31, 
 2020
December 31, 2019
Assets
 
 
 
 
Operating
Operating lease right-of-use assets
 
$
48,847

$
53,098

Total leased right-of-use assets
 
 
$
48,847

$
53,098

Liabilities
 
 
 
 
Current
 
 
 
 
Operating
Current portion of operating lease liabilities
 
$
50,402

$
53,587

Non-current
 
 
 
 
Operating
Operating lease liabilities
 
108,741

117,964

Total lease liabilities
 
 
$
159,143

$
171,551

 
 
 
 
 
Lease Term and Discount Rate
 
 
 
 
Weighted average remaining lease term:
 
 
 
Operating leases
 
 
4.4 years
4.5 years
 
 
 
 
 
Weighted average discount rate:
 
 
 
 
Operating leases
 
 
5.7%
5.7%

The components of lease expense were as follows:
Lease Costs
 
Classification
 
Three Months Ended 
 March 31, 2020
 
Three Months Ended 
 March 31, 2019
Operating lease costs(1)
 
Cost of sales
 
$
9,617

 
$
25,115

Operating lease costs(2)
 
Selling, general and administrative
 
542

 
1,169

 
 
 
 
$
10,159

 
$
26,284


    
(1) Includes short-term operating lease costs of $2.8 million and $6.6 million for the three months ended March 31, 2020 and 2019, respectively.
(2) Includes short-term operating lease costs of $0.1 million and $0.2 million for the three months ended March 31, 2020 and 2019, respectively.
Supplemental cash flow information related to leases was as follows:
 
 
Three Months Ended 
 March 31, 2020
Three Months Ended 
 March 31, 2019
Cash paid for amounts included in the measurement of lease liabilities:
 
 
 
Operating cash flows for operating leases
 
$
17,365

$
2,584

 
 
 
 
Right-of-use assets obtained in exchange for new lease liabilities:
 
 
 
Operating leases
 
$
3,872

$
223,027


Maturities of lease liabilities as of March 31, 2020:
Maturities of lease liabilities
Operating leases
2020 (remaining nine months)
$
46,362

2021
45,227

2022
34,067

2023
22,411

2024
16,268

Thereafter
22,284

Total lease payments
$
186,619

Less: Interest
27,476

Total
$
159,143


Leases
NOTE Q— LEASES
We lease railroad cars, office space, mining property, mining/processing equipment and transportation and other equipment. The majority of our leases have remaining lease terms of one year to 20 years. Our lease terms may include options to extend or terminate the lease when it is reasonably certain that we will exercise that option. As most of our leases do not provide an implicit rate, we use our incremental borrowing rate based on the information available at the commencement date in determining the present value of lease payments. We have lease agreements with lease and non-lease components, the latter of which are generally accounted for separately.
Supplemental balance sheet information related to leases was as follows:
Leases
Classification
 
March 31, 
 2020
December 31, 2019
Assets
 
 
 
 
Operating
Operating lease right-of-use assets
 
$
48,847

$
53,098

Total leased right-of-use assets
 
 
$
48,847

$
53,098

Liabilities
 
 
 
 
Current
 
 
 
 
Operating
Current portion of operating lease liabilities
 
$
50,402

$
53,587

Non-current
 
 
 
 
Operating
Operating lease liabilities
 
108,741

117,964

Total lease liabilities
 
 
$
159,143

$
171,551

 
 
 
 
 
Lease Term and Discount Rate
 
 
 
 
Weighted average remaining lease term:
 
 
 
Operating leases
 
 
4.4 years
4.5 years
 
 
 
 
 
Weighted average discount rate:
 
 
 
 
Operating leases
 
 
5.7%
5.7%

The components of lease expense were as follows:
Lease Costs
 
Classification
 
Three Months Ended 
 March 31, 2020
 
Three Months Ended 
 March 31, 2019
Operating lease costs(1)
 
Cost of sales
 
$
9,617

 
$
25,115

Operating lease costs(2)
 
Selling, general and administrative
 
542

 
1,169

 
 
 
 
$
10,159

 
$
26,284


    
(1) Includes short-term operating lease costs of $2.8 million and $6.6 million for the three months ended March 31, 2020 and 2019, respectively.
(2) Includes short-term operating lease costs of $0.1 million and $0.2 million for the three months ended March 31, 2020 and 2019, respectively.
Supplemental cash flow information related to leases was as follows:
 
 
Three Months Ended 
 March 31, 2020
Three Months Ended 
 March 31, 2019
Cash paid for amounts included in the measurement of lease liabilities:
 
 
 
Operating cash flows for operating leases
 
$
17,365

$
2,584

 
 
 
 
Right-of-use assets obtained in exchange for new lease liabilities:
 
 
 
Operating leases
 
$
3,872

$
223,027


Maturities of lease liabilities as of March 31, 2020:
Maturities of lease liabilities
Operating leases
2020 (remaining nine months)
$
46,362

2021
45,227

2022
34,067

2023
22,411

2024
16,268

Thereafter
22,284

Total lease payments
$
186,619

Less: Interest
27,476

Total
$
159,143