Joint Ventures (Details) - USD ($) $ in Thousands	1 Months Ended	12 Months Ended
	Jan. 31, 2021	Dec. 31, 2017	Jun. 30, 2021	Dec. 31, 2020	Jun. 30, 2020	Dec. 31, 2019
Assets:
Cash and cash equivalents			$ 399,881	$ 472,246	$ 484,336	$ 435,990
Accounts receivable			312,136	362,977
Other current assets			116,062	109,595
Property, plant and equipment, net			3,562,350	3,985,707
Other long-term assets			141,721	139,085
Total assets			5,042,318	5,503,428
Liabilities:
Accounts payable			232,543	220,922
Accrued liabilities			270,890	276,085
Total liabilities			3,706,878	3,803,780
SANAD
Joint Ventures
Settled accrued interest	$ 100,000
Assets:
Cash and cash equivalents			304,924	368,981
Accounts receivable			70,273	79,711
Other current assets			11,105	17,148
Property, plant and equipment, net			456,050	428,331
Other long-term assets			20,223	2,590
Total assets			862,575	896,761
Liabilities:
Accounts payable			60,269	61,808
Accrued liabilities			29,792	18,791
Total liabilities			$ 90,061	$ 80,599
SANAD | Saudi Aramco
Joint Ventures
Cash contribution for joint venture		$ 20,000
Additional contribution amount		$ 394,000
Maturity period		25 years