LEASES (Tables)

9 Months Ended

Sep. 30, 2019

Leases [Abstract]

Components of lease and supplemental cash flow information

For the three and nine months ended September 30, 2019, the components of operating lease expense were as follows:

	Three Months Ended September 30, 2019		Nine Months Ended September 30, 2019
Fixed operating lease expense	$	6,265	$	19,561
Variable operating lease expense	2,860		9,211
Total operating lease expense	$	9,125	$	28,772

Supplemental cash flow information related to the Company's operating leases for the nine months ended September 30, 2019 was as follows:

Cash paid for amounts included in the measurement of operating lease liabilities	$	9,884
ROU assets obtained in exchange for operating lease obligations	—

For the three and nine months ended September 30, 2019, the components of finance lease expense were as follows:

	Three Months Ended September 30, 2019		Nine Months Ended September 30, 2019
Amortization of right of use assets	$	3,919	$	11,753
Interest expense	434		1,484
Total finance lease expense	$	4,353	$	13,237

The following table presents the weighted average lease term and weighted average discount rate related to the Company's finance leases as of September 30, 2019:

Weighted average remaining lease term (in years)	1.59
Weighted average discount rate	5.37	%

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 September 30, 2019:

Lease Assets and Liabilities	Classification
Assets:
Operating Lease ROU Assets	Other Assets	$	77,411
Liabilities:
Current:
Operating Lease Liabilities	Other Accrued Liabilities	$	15,769
Long-Term:
Operating Lease Liabilities	Operating Lease Liabilities	$	66,432
Total Operating Lease Liabilities		$	82,201
Weighted average remaining lease term (in years)		5.07
Weighted average discount rate		5.64		%

Schedule of future maturities of finance lease liabilities

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 September 30, 2019:

	Finance		Operating
	Leases		Leases
Remainder of 2019	$	3,406	$	8,746
2020	20,222		24,067
2021	6,565		23,134
2022	154		13,341
2023	133		6,504
Thereafter	24		22,073
Total minimum lease payments	30,504		97,865
Less amount representing interest	1,339		15,664
Present value of minimum lease payments	$	29,165	$	82,201

At September 30, 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:

Remainder of 2019		2020		2021		2022		2023		Thereafter		Total
$	925	$	3,699	$	2,157	$	—	$	—	$	—	$	6,781

Schedule of future maturities of operating lease liabilities

At September 30, 2019, scheduled minimum rental payments for operating leases related to this equipment were as follows:

Remainder of 2019		2020		2021		2022		2023		Thereafter		Total
$	311	$	627	$	—	$	—	$	—	$	—	$	938

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 September 30, 2019:

	Finance		Operating
	Leases		Leases
Remainder of 2019	$	3,406	$	8,746
2020	20,222		24,067
2021	6,565		23,134
2022	154		13,341
2023	133		6,504
Thereafter	24		22,073
Total minimum lease payments	30,504		97,865
Less amount representing interest	1,339		15,664
Present value of minimum lease payments	$	29,165	$	82,201