Fair Value Measurements (Tables)

9 Months Ended

Sep. 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 September 30,				Nine months ended September 30,
In thousands	2022		2021		2022		2021
Proved property impairments	$	—	$	—	$	11,821	$	—
Unproved property impairments	12,794		7,945		41,047		30,991
Total	$	12,794	$	7,945	$	52,868	$	30,991

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. 

	September 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	20,627		18,800		22,356		22,000
4.5% Senior Notes due 2023	635,351		632,900		648,078		670,200
3.8% Senior Notes due 2024	891,110		866,100		908,061		950,000
2.268% Senior Notes due 2026	793,698		681,600		792,621		795,200
4.375% Senior Notes due 2028	992,772		894,900		991,880		1,082,100
5.75% Senior Notes due 2031	1,483,453		1,351,800		1,482,319		1,769,600
2.875% Senior Notes due 2032	792,057		583,000		791,521		780,500
4.9% Senior Notes due 2044	692,204		505,200		692,056		781,500
Total debt	$	6,301,272	$	5,534,300	$	6,828,892	$	7,351,100