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Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2020

Commitments And Contingencies Disclosure [Abstract]

The components of our total lease expense for the two years ended December 31, 2020, the majority of which is included in general and administrative expense, are as follows (in thousands):

		Year Ended December 31,
		2020			2019
Operating lease cost	$	27,895		$	15,536
Variable lease expense ⁽¹⁾		33,849			6,916
Short-term lease expense ⁽²⁾		1,866			2,965
Sublease income		(3,199	)		(3,496	)
Total lease expense	$	60,411		$	21,921

Short-term lease costs ⁽³⁾	$	15,984		$	29,126

(1) Variable lease payments that are not dependent on an index or rate are not included in the lease liability or ROU assets.

(2) Short-term lease expense represents expense related to leases with a contract term of one year or less.

(3) These short-term lease costs are related to leases with a contract term of one year or less and the majority of which are related to drilling rigs and are capitalized as part of natural gas and oil properties on our consolidated balance sheets and may fluctuate based on the number of drilling rigs being utilized.

Supplemental Cash Flow Information Related to Operating Leases

Supplemental cash flow information related to our operating leases is included in the table below (in thousands):

			Year Ended December 31,
		2020			2019
Cash paid for amounts included in the measurement of lease liabilities	$	32,030		$	18,700
ROU assets added in exchange for lease obligations	$	27,769		$	24,839

Supplemental Balance Sheet Information Related to Operating Leases

Supplemental balance sheet information related to our operating leases is included in the table below (in thousands):

			Year Ended December 31,
		2020				2019
Operating lease ROU assets	$	63,581			$	62,053
Accrued liabilities – current	$	(24,673		)	$	(27,856	)
Operating lease liabilities – long-term	$	(43,155		)	$	(41,068	)

Schedule of Weighted Average Remaining Lease Term and Weighted Average Discount Rate for Operating Leases

Our weighted average remaining lease term and weighted average discount rate for our operating leases are as follows:

	Year Ended December 31,
	2020	2019
Weighted average remaining lease term	4.0 years	4.6 years
Weighted average discount rate	6%	6%

Schedule of Lease Liabilities with Enforceable Contract Terms are Greater Than One year Mature

Our lease liabilities with enforceable contract terms that are greater than one year mature as follows (in thousands):

		Operating Leases
2021	$	27,850
2022		20,868
2023		6,866
2024		6,468
2025		6,468
Thereafter		8,795
Total lease payments		77,315
Less effects of discounting		(9,487	)
Total lease liability	$	67,828

Schedule of Future Minimum Transportation Fees Due

We have entered into firm transportation and gathering contracts with various pipeline carriers for the future transportation and gathering of natural gas, NGLs and oil production from our properties in Pennsylvania. Under these contracts, we are obligated to transport, process or gather minimum daily natural gas volumes, or pay for any deficiencies at a specified reservation fee rate. Our production committed to these pipelines is currently expected to exceed the minimum daily volumes provided in the contracts. However, if in the future we fail to deliver the committed volumes, we would recognize a deficiency payment in the period in which the under delivery takes place and the related liability has been incurred. As of December 31, 2020, future minimum transportation, processing and gathering fees under our commitments are as follows (in thousands):

	Transportation, Gathering and Processing Contracts ^(a)
2021	$	837,792
2022		818,569
2023		782,130
2024		766,474
2025		680,757
Thereafter		4,138,532
	$	8,024,254

^(a) The amounts in this table represent the gross amounts that we are committed to pay; however, we will record in our financial statements our proportionate share of costs based on our working interest which can vary based on volumes produced.

Schedule of Estimated Settlement of Divestiture Contract Obligation Based On Discounted Value

As of December 31, 2020, our estimated settlement of this retained obligation based on a discounted value is as follows (in thousands):

	Divestiture Contract Obligation
2021	$	92,593
2022		74,942
2023		62,639
2024		54,042
2025		47,704
Thereafter		152,175
	$	484,095

Future Delivery Commitments

We have various volume delivery commitments that are related to our Marcellus Shale properties. We expect to be able to fulfill our contractual obligations from our own production; however, we may purchase third-party volumes to satisfy our commitments or pay demand fees for commitment shortfalls, should they occur. As of December 31, 2020, our delivery commitments through 2031 were as follows:

Year Ending December 31,	Natural Gas (mmbtu per day)		Ethane and Propane (bbls per day)
2021		476,877	35,000
2022		477,679	35,000
2023		292,423	35,000
2024		211,216	35,000
2025		170,000	35,000
2026		158,301	35,000
2027		100,000	35,000
2028		100,000	35,000
2029		100,000	20,000
2030-2031		—	20,000