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Properties and Equipment
 3 Months Ended
Mar. 31, 2022
Property, Plant and Equipment [Line Items]  
Property, Plant and Equipment Disclosure
NOTE 6 - PROPERTIES AND EQUIPMENT, NET

The following table presents the components of properties and equipment, net of accumulated depreciation, depletion and amortization (“DD&A”) as of the dates indicated:
March 31, 2022December 31, 2021
(in thousands)
Properties and equipment, net:
Crude oil and natural gas properties
Proved$8,511,308 $8,310,018 
Unproved306,210 306,181 
Total crude oil and natural gas properties8,817,518 8,616,199 
Equipment and other66,917 63,099 
Land and buildings19,928 19,928 
Construction in progress387,212 371,968 
Properties and equipment, at cost9,291,575 9,071,194 
Accumulated DD&A(4,405,311)(4,256,329)
Properties and equipment, net$4,886,264 $4,814,865 

Impairment of Oil and Gas Properties. There were no significant impairment charges recognized related to our proved and unproved properties during the three months ended March 31, 2022 and 2021.

Suspended Well Costs. The following table presents the capitalized exploratory well cost pending determination of proved reserves and included in properties and equipment for the periods presented:
Three Months Ended March 31, 2022
Year Ended December 31, 2021
(in thousands, except for number of wells)
Beginning balance$— $7,459 
Additions to capitalized exploratory well costs pending the determination of proved reserves3,428 5,902 
Reclassifications to proved properties— (13,361)
Ending balance$3,428 $— 
Number of wells pending determination at period-end1—
As of March 31, 2022, there were no exploratory well costs that were capitalized for more than one year.