Fair Value Measurements (Tables)

3 Months Ended

Mar. 31, 2020

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 comprehensive income (loss).



	Three months ended March 31,
In thousands	2020		2019
Proved property impairments	$	205,545	$	—
Unproved property impairments	16,984		25,316
Total	$	222,529	$	25,316

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.



	March 31, 2020				December 31, 2019
In thousands	Carrying Amount		Estimated Fair Value		Carrying Amount		Estimated Fair Value
Debt:
Credit facility	$	735,000	$	735,000	$	55,000	$	55,000
Note payable	4,753		4,800		5,351		5,400
5% Senior Notes due 2022	1,099,234		692,400		1,099,165		1,108,700
4.5% Senior Notes due 2023	1,458,753		812,200		1,491,339		1,571,400
3.8% Senior Notes due 2024	987,644		507,700		994,310		1,034,200
4.375% Senior Notes due 2028	989,928		463,700		989,661		1,063,700
4.9% Senior Notes due 2044	691,732		298,600		691,688		742,000
Total debt	$	5,967,044	$	3,514,400	$	5,326,514	$	5,580,400