Asset Retirement Obligations

12 Months Ended

Dec. 31, 2022

Asset Retirement Obligation Disclosure [Abstract]

12. ASSET RETIREMENT OBLIGATIONS

The following table provides a summary of changes in asset retirement obligations:


	Year Ended December 31,
thousands	2022		2021
Carrying amount of asset retirement obligations at beginning of year	$	308,209	$	280,498
Liabilities incurred	10,513		23,923
Liabilities settled	(10,115)		(12,710)
Accretion expense	14,474		12,664
Revisions in estimated liabilities	(22,567)		3,834
Carrying amount of asset retirement obligations at end of year	$	300,514	$	308,209

Revisions in estimated liabilities for the year ended December 31, 2022, primarily related to a reduction in expected settlement costs at the West Texas and Brasada complexes, as well as the DBM oil and DBM water systems, partially offset by an increase in expected settlement costs at the Red Desert, Granger, and DJ Basin complexes, and at the Highlight system.