Property, Plant and Equipment (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Property, Plant and Equipment
Property, plant and equipment, gross	$ 12,329,080	$ 12,316,912
Less: accumulated depreciation and amortization	(9,302,980)	(8,968,414)
Property, Plant and Equipment, Net	3,026,100	3,348,498	$ 3,985,707
Depreciation	663,100	689,200	851,800
Repair and maintenance expense	202,500	153,900	$ 154,200
Land
Property, Plant and Equipment
Property, plant and equipment, gross	22,672	22,955
Buildings
Property, Plant and Equipment
Property, plant and equipment, gross	134,063	130,917
Drilling rigs and related equipment
Property, Plant and Equipment
Property, plant and equipment, gross	11,722,404	11,718,450
Oilfield hauling and mobile equipment
Property, Plant and Equipment
Property, plant and equipment, gross	233,708	243,850
Other machinery and equipment
Property, Plant and Equipment
Property, plant and equipment, gross	$ 216,233	$ 200,740

Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

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The aggregate costs of keeping the property in good condition but that do not appreciably prolong the life or increase the value of the property.

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The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation.

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Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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