Drilling and Other Property and Equipment (Tables)

6 Months Ended

Jun. 30, 2019

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):

	June 30,			December 31,
	2019			2018
Drilling rigs and equipment	$	8,228,429		$	8,210,824
Land and buildings		63,795			63,757
Office equipment and other		91,887			91,819
Cost		8,384,111			8,366,400
Less: accumulated depreciation		(3,220,415	)		(3,182,178	)
Drilling and other property and equipment, net	$	5,163,696		$	5,184,222