Joint Ventures (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Jun. 30, 2020	Dec. 31, 2019	Jun. 30, 2019	Dec. 31, 2018
Assets:
Cash and cash equivalents		$ 484,336	$ 435,990	$ 367,693	$ 447,766
Accounts receivable		349,005	453,042
Other current assets		142,540	164,257
Property, plant and equipment, net		4,395,725	4,930,549
Other long-term assets		158,049	247,219
Total assets (1)		5,982,415	6,760,658
Liabilities:
Accounts payable		221,755	295,159
Accrued liabilities		274,270	333,282
Total liabilities (1)		4,040,798	4,285,101
SANAD
Assets:
Cash and cash equivalents		354,608	289,575
Accounts receivable		59,930	68,624
Other current assets		14,681	18,149
Property, plant and equipment, net		443,517	455,751
Other long-term assets		8,471	15,118
Total assets (1)		881,207	847,217
Liabilities:
Accounts payable		58,005	64,365
Accrued liabilities		22,630	17,929
Total liabilities (1)		$ 80,635	$ 82,294
SANAD | Saudi Aramco
Joint Ventures
Cash contribution for joint venture	$ 20,000
Additional contribution amount	$ 394,000
Maturity period	25 years