Leases (Tables)

12 Months Ended

Dec. 31, 2019

Leases [Abstract]

Components of lease and supplemental cash flow information

For the year ended December 31, 2019, the components of operating lease expense were as follows:

Fixed operating lease expense	$	25,875
Variable operating lease expense	11,445
Total operating lease expense	$	37,320

Supplemental cash flow information related to the Company's operating leases for the year ended December 31, 2019 was as follows:

Cash paid for amounts included in the measurement of operating lease liabilities	$	25,675
ROU assets obtained in exchange for operating lease obligations	—

For the year ended December 31, 2019, the components of finance lease expense were as follows:

Amortization of right of use assets	$	15,691
Interest expense	1,878
Total finance lease expense	$	17,569

The following table presents the weighted average lease term and weighted average discount rate related to the Company's finance leases as of December 31, 2019:

Weighted average remaining lease term (in years)	1.69
Weighted average discount rate	5.20	%

Schedule of lease balances, weighted average lease terms and discount rates

The following table presents the lease balances within the Consolidated Balance Sheet, weighted average lease term, and the weighted average discount rate related to the Company's operating leases at December 31, 2019:

Lease Assets and Liabilities	Classification
Assets:
Operating Lease ROU Assets	Other Assets	$	72,632
Liabilities:
Current:
Operating Lease Liabilities	Other Accrued Liabilities	$	19,479
Long-Term:
Operating Lease Liabilities	Operating Lease Liabilities	$	55,413
Total Operating Lease Liabilities		$	74,892
Weighted average remaining lease term (in years)		5.02
Weighted average discount rate		6.79		%

Schedule of future maturities of operating lease liabilities

At December 31, 2019, scheduled minimum rental payments for operating leases related to this equipment were as follows:

2020		2021		2022		2023		2024		Thereafter		Total
$	627	$	—	$	—	$	—	$	—	$	—	$	627

The following table presents the future maturities of the Company's operating and finance lease liabilities, together with the present value of the net minimum lease payments, at December 31, 2019:

	Finance		Operating
	Leases		Leases
2020	$	19,120	$	24,065
2021	7,196		23,132
2022	783		13,341
2023	803		6,504
2024	575		6,115
Thereafter	—		15,958
Total minimum lease payments	28,477		89,115
Less amount representing interest	1,222		14,223
Present value of minimum lease payments	$	27,255	$	74,892

Schedule of future maturities of finance lease liabilities

At December 31, 2019, certain finance leases for mining equipment are subleased to a third-party. The following table represents the minimum payments, including interest, for those finance subleases:

2020		2021		2022		2023		2024		Thereafter		Total
$	3,699	$	2,157	$	—	$	—	$	—	$	—	$	5,856

The following table presents the future maturities of the Company's operating and finance lease liabilities, together with the present value of the net minimum lease payments, at December 31, 2019:

	Finance		Operating
	Leases		Leases
2020	$	19,120	$	24,065
2021	7,196		23,132
2022	783		13,341
2023	803		6,504
2024	575		6,115
Thereafter	—		15,958
Total minimum lease payments	28,477		89,115
Less amount representing interest	1,222		14,223
Present value of minimum lease payments	$	27,255	$	74,892