Organization and Significant Accounting Policies - Additional Information (Details) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019 USD ($) vessel floaters rig	Sep. 30, 2019 USD ($)	Jun. 30, 2019 USD ($)	Mar. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Sep. 30, 2018 USD ($)	Jun. 30, 2018 USD ($)	Mar. 31, 2018 USD ($)	Dec. 31, 2019 USD ($) joint_venture vessel floaters rig segment	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Dec. 03, 2019	Jan. 01, 2019 USD ($)
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Number of rigs | rig	25								25
Number of floaters | floaters	12								12
Number of jackups | vessel	13								13
Number of reportable segments | segment									1
Number of joint ventures | joint_venture									2
Percent of interest in joint ventures									50.00%
Interest acquired												50.00%
Cash and cash equivalents	$ 104,621				$ 375,232				$ 104,621	$ 375,232
Restricted cash	1,300				700				1,300	700
Allowance for doubtful accounts on receivables	1,900				2,200				1,900	2,200
Capital accruals									$ 36,000	52,100
Period for incurring maintenance costs, minimum									3 years
Period for incurring maintenance costs, maximum									5 years
Deferred revenues	65,055				80,753				$ 65,055	80,753	$ 108,861
Deferred expenses under drilling contracts	30,800				47,700				30,800	47,700
Loss reserves for personal injury and protection claims	27,900				22,400				27,900	22,400
Net loss from discontinued operations, net of tax	0	$ 0	$ 0	$ (3,821)	0	$ 0	$ 0	$ 0	(3,821)	0	(1,486)
Present value of lease liability	33,369								33,369
Operating lease right-of-use assets	$ 33,480								$ 33,480
Accounting Standards Update 2016-02
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Present value of lease liability													$ 28,000
Operating lease right-of-use assets													$ 28,000
Drilling Equipment | Minimum
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Maximum useful life of property plant and equipment									3 years
Drilling Equipment | Maximum
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Maximum useful life of property plant and equipment									30 years
Other | Minimum
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Maximum useful life of property plant and equipment									2 years
Other | Maximum
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Maximum useful life of property plant and equipment									40 years
Bully Joint Venture
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Carrying amount of the drillships					700,000					700,000
Cash and cash equivalents					$ 45,200					$ 45,200
Borrowings By Paragon Offshore | Mexico
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net loss from discontinued operations, net of tax									$ (3,800)		$ 1,500