Joint Ventures (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2019	Dec. 31, 2018
Assets:
Accounts receivable		$ 453,042	$ 756,320
Other current assets		164,257	177,604
Property, plant and equipment, net	$ 6,109,565	4,930,549	5,467,870
Other long-term assets		247,219	263,506
Total assets (1)		6,760,658	7,853,944
Liabilities:
Accounts payable		295,159	392,843
Accrued liabilities		333,282	417,912
Total liabilities (1)		4,285,101	4,698,757
SANAD
Assets:
Cash and cash equivalents		289,575	211,618
Accounts receivable		68,624	73,699
Other current assets		18,149	17,198
Property, plant and equipment, net		455,751	457,963
Other long-term assets		15,118	36,583
Total assets (1)		847,217	797,061
Liabilities:
Accounts payable		64,365	60,087
Accrued liabilities		17,929	8,530
Total liabilities (1)		$ 82,294	$ 68,617
SANAD | Saudi Aramco
Joint Ventures
Cash contribution for joint venture	20,000
Additional contribution amount	$ 394,000
Maturity period	25 years