Condensed Consolidated Statements of Operations (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Revenues:
Total revenues	$ 229,170	$ 233,542
Operating expenses:
Depreciation	93,043	86,898
General and administrative	16,345	17,312
Impairment of assets	774,028
(Gain) loss on disposition of assets	(3,433)	4,287
Total operating expenses	1,075,607	282,669
Operating loss	(846,437)	(49,127)
Other income (expense):
Interest income	389	2,414
Interest expense, net of amounts capitalized	(32,321)	(29,925)
Foreign currency transaction gain (loss)	207	(1,085)
Other, net	323	333
Loss before income tax benefit	(877,839)	(77,390)
Income tax benefit	15,899	4,062
Net loss	$ (861,940)	$ (73,328)
Loss per share, Basic and Diluted	$ (6.25)	$ (0.53)
Weighted-average shares outstanding:
Shares of common stock	137,831	137,522
Total weighted-average shares outstanding	137,831	137,522
Contract Drilling [Member]
Revenues:
Total revenues	$ 217,866	$ 226,697
Operating expenses:
Contract drilling, excluding depreciation	184,511	167,429
Reimbursable Expenses [Member]
Revenues:
Total revenues	11,304	6,845
Operating expenses:
Contract drilling, excluding depreciation	$ 11,113	$ 6,743