Drilling and Other Property and Equipment (Tables)

3 Months Ended

Mar. 31, 2021

Property Plant And Equipment [Abstract]

Summary of Cost and Accumulated Depreciation of Drilling and Other Property and Equipment

Cost and accumulated depreciation of drilling and other property and equipment are summarized as follows (in thousands):

	March 31,			December 31,
	2021			2020
Drilling rigs and equipment	$	6,558,577		$	6,987,630
Land and buildings		40,425			41,072
Office equipment and other		83,226			83,016
Cost		6,682,228			7,111,718
Less: accumulated depreciation		(2,781,814	)		(2,988,909	)
Drilling and other property and equipment, net	$	3,900,414		$	4,122,809