Leases (Tables)

12 Months Ended

Dec. 31, 2022

Leases [Abstract]

Schedule of Components of Expense and Supplemental Cash Flow Information

For the years ended December 31, 2022 and 2021, the components of operating lease expense were as follows:

	December 31,
	2022		2021
Fixed operating lease expense	$	11,467	$	17,695
Variable operating lease expense	10,752		6,884
Total operating lease expense	$	22,219	$	24,579

Supplemental cash flow information related to the Company's operating leases for the years ended December 31, 2022 and 2021 was as follows:

	December 31,
	2022		2021
Cash paid for amounts included in the measurement of operating lease liabilities	$	22,020	$	25,330
Cash paid for early buyout of existing operating lease for longwall shields	—		18,380
ROU assets obtained in exchange for operating lease obligations	—		—

The Company also enters into finance leases for mining equipment and automobiles. Assets arising from finance leases are included in property, plant and equipment-net and the liabilities are included in current portion of long-term debt and long-term debt in the accompanying Consolidated Balance Sheets.

For the years ended December 31, 2022 and 2021, the components of finance lease expense were as follows:

	December 31,
	2022		2021
Amortization of right of use assets	$	24,206	$	27,846
Interest expense	2,751		3,501
Total finance lease expense	$	26,957	$	31,347

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, 2022 and 2021:

	December 31, 2022		December 31, 2021
Weighted average remaining lease term (in years)	1.62		2.03
Weighted average discount rate	6.53	%	6.21	%

Schedule of Lease Assets and Liabilities

The following table presents the lease balances within the Consolidated Balance Sheets, weighted average lease term, and the weighted average discount rate related to the Company's operating leases at December 31, 2022 and 2021:

		December 31,
Lease Assets and Liabilities	Classification	2022			2021
Assets:
Operating Lease ROU Assets	Other Assets	$	19,799		$	21,956
Liabilities:
Current:
Operating Lease Liabilities	Operating Lease Liabilities	$	4,922		$	6,682
Long-Term:
Operating Lease Liabilities	Operating Lease Liabilities	$	15,073		$	15,274
Total Operating Lease Liabilities		$	19,995		$	21,956
Weighted average remaining lease term (in years)		4.83			3.98
Weighted average discount rate		7.13		%	6.78		%

Lessee, Operating Lease, Liability, Maturity

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, 2022:

	Finance Leases		Operating Leases
2023	$	25,706	$	6,120
2024	10,603		5,680
2025	3,134		4,107
2026	159		3,964
2027	86		652
Thereafter	—		3,438
Total minimum lease payments	39,688		23,961
Less amount representing interest	(2,358)		(3,966)
Present value of minimum lease payments	$	37,330	$	19,995

Finance Lease, Liability, Fiscal Year Maturity

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, 2022:

	Finance Leases		Operating Leases
2023	$	25,706	$	6,120
2024	10,603		5,680
2025	3,134		4,107
2026	159		3,964
2027	86		652
Thereafter	—		3,438
Total minimum lease payments	39,688		23,961
Less amount representing interest	(2,358)		(3,966)
Present value of minimum lease payments	$	37,330	$	19,995