LEASES (Tables)

6 Months Ended

Jun. 30, 2019

Leases [Abstract]

Components of lease and supplemental cash flow information

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

	Three Months Ended June 30, 2019		Six Months Ended June 30, 2019
Fixed operating lease expense	$	6,439	$	13,296
Variable operating lease expense	3,299		6,351
Total operating lease expense	$	9,738	$	19,647

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

Cash paid for amounts included in the measurement of operating lease liabilities	$	7,820
ROU assets obtained in exchange for operating lease obligations	—

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

	Three Months Ended June 30, 2019		Six Months Ended June 30, 2019
Amortization of right of use assets	$	3,920	$	7,834
Interest expense	495		1,050
Total finance lease expense	$	4,415	$	8,884

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

Weighted average remaining lease term (in years)	1.82
Weighted average discount rate	5.38	%

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 June 30, 2019:

Lease Assets and Liabilities	Classification
Assets:
Operating Lease ROU Assets	Other Assets	$	82,105
Liabilities:
Current:
Operating Lease Liabilities	Other Accrued Liabilities	$	15,798
Long-Term:
Operating Lease Liabilities	Operating Lease Liabilities	$	68,466
Total Operating Lease Liabilities		$	84,264
Weighted average remaining lease term (in years)		5.34
Weighted average discount rate		6.77		%

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 June 30, 2019:

	Finance		Operating
	Leases		Leases
Remainder of 2019	$	8,492	$	12,235
2020	20,224		23,921
2021	6,563		23,134
2022	151		13,341
2023	130		6,504
Thereafter	13		22,239
Total minimum lease payments	35,573		101,374
Less amount representing interest	1,782		17,110
Present value of minimum lease payments	$	33,791	$	84,264

At June 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
$	1,849	$	3,699	$	2,157	$	—	$	—	$	—	$	7,705

Schedule of future maturities of operating lease liabilities

At June 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
$	774	$	627	$	—	$	—	$	—	$	—	$	1,401

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 June 30, 2019:

	Finance		Operating
	Leases		Leases
Remainder of 2019	$	8,492	$	12,235
2020	20,224		23,921
2021	6,563		23,134
2022	151		13,341
2023	130		6,504
Thereafter	13		22,239
Total minimum lease payments	35,573		101,374
Less amount representing interest	1,782		17,110
Present value of minimum lease payments	$	33,791	$	84,264