Fair Value Measurements (Tables)

6 Months Ended

Jun. 30, 2022

Fair Value Disclosures [Abstract]

Property Impairments

The following table sets forth the non-cash impairments of both proved and unproved properties for the indicated periods. Proved and unproved property impairments are recorded under the caption “Property impairments” in the unaudited condensed consolidated statements of operations.

	Three months ended June 30,				Six months ended June 30,
In thousands	2022		2021		2022		2021
Proved property impairments	$	—	$	—	$	11,821	$	—
Unproved property impairments	15,826		11,610		28,253		23,046
Total	$	15,826	$	11,610	$	40,074	$	23,046

Fair Values of Financial Instruments not Recorded at Fair Value

The following table sets forth the estimated fair values of financial instruments that are not recorded at fair value in the condensed consolidated financial statements. 

	June 30, 2022				December 31, 2021
In thousands	Carrying Amount		Estimated Fair Value		Carrying Amount		Estimated Fair Value
Debt:
Credit facility	$	—	$	—	$	500,000	$	500,000
Notes payable	21,207		19,800		22,356		22,000
4.5% Senior Notes due 2023	635,056		636,900		648,078		670,200
3.8% Senior Notes due 2024	890,819		885,300		908,061		950,000
2.268% Senior Notes due 2026	793,337		708,500		792,621		795,200
4.375% Senior Notes due 2028	992,471		939,900		991,880		1,082,100
5.75% Senior Notes due 2031	1,483,070		1,447,300		1,482,319		1,769,600
2.875% Senior Notes due 2032	791,876		627,900		791,521		780,500
4.9% Senior Notes due 2044	692,155		555,200		692,056		781,500
Total debt	$	6,299,991	$	5,820,800	$	6,828,892	$	7,351,100