Supplemental Balance Sheet and Income Statement Information - Other Expense (Income) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Other expense (income)
Losses (gains) on sales, disposals and involuntary conversions of long-lived assets	$ 4,811	$ 10,009	$ 74,371	$ 10,142
Transaction related costs	1,753	3,178	14,691	5,107
Litigation expenses and reserves	1,375	(2,187)	9,652	(577)
Foreign currency transaction losses (gains)	1,607	(763)	7,851	1,727
(Gain) loss on debt buyback	10,476	69	10,476	16,013
Other losses (gains)	2,885	(4,747)	(2,444)	(3,239)
Other expense (income)	$ 22,907	$ 5,559	114,597	$ 29,173
Jack Up Rigs
Other expense (income)
Loss on sale of offshore rigs			$ (63,700)