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Basis Of Presentation [Line Items]

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Cash Collateralized

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Decrease In Revenue

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Decrease In Rigs

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Number Of Rigs

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Shares Reserved For Issuance

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Percentage of voting equity interests acquired at the acquisition date in the business combination.

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Face (par) amount of debt instrument at time of issuance.

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Contractual interest rate for funds borrowed, under the debt agreement.

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The cash outflow for debt initially having maturity due after one year or beyond the normal operating cycle, if longer.

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Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation.

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Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

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Basis Of Presentation (Details)	3 Months Ended				9 Months Ended
Basis Of Presentation (Details)	Sep. 30, 2020 USD ($) item	Jun. 30, 2020	Mar. 31, 2020 USD ($) item	Sep. 30, 2019 USD ($)	Sep. 30, 2020 USD ($)	Sep. 30, 2019 USD ($)
Basis Of Presentation [Line Items]
Shares reserved for issuance					10.00%
Restructuring expense	$ 25,746,000				$ 27,033,000
Cash Collateralized					105.00%
Aggregate Principal Amount					66.60%
New Common Stock					2.00%
Pro Rata Share					98.00%
Debt repayment					$ 1,300,000,000
Decrease in revenue	53.00%
Revenues	$ 166,928,000		$ 356,600,000	$ 356,585,000	672,278,000	$ 1,089,297,000
United States [Member]
Basis Of Presentation [Line Items]
Decrease in rigs	30.00%	60.00%
Revenues	$ 95,100,000			$ 255,427,000	$ 423,376,000	$ 805,704,000
International [Member]
Basis Of Presentation [Line Items]
Decrease in rigs	10.00%
Number of rigs \| item	731		834
Existing Prepetiion Equity [Member] \| Reorganized Company [Member]
Basis Of Presentation [Line Items]
Equity interest acquired	2.00%				2.00%
Prepetition Noteholders [Member] \| Reorganized Company [Member]
Basis Of Presentation [Line Items]
Equity interest acquired	98.00%				98.00%
Original Senior Unsecured Notes Due 2021 [Member]
Basis Of Presentation [Line Items]
Stated interest rate	7.125%				7.125%
New Senior Unsecured Notes Due 2021 [Member]
Basis Of Presentation [Line Items]
Debt issuance	$ 800,000,000				$ 800,000,000
Stated interest rate	7.125%				7.125%
Senior Unsecured Notes Due 2024 [Member]
Basis Of Presentation [Line Items]
Debt issuance	$ 500,000,000				$ 500,000,000
Stated interest rate	7.75%				7.75%
Delayed-Draw Term Loan Commitment Letter [Member]
Basis Of Presentation [Line Items]
Debt issuance	$ 200,000,000				$ 200,000,000
Backstop Commitment Parties [Member]
Basis Of Presentation [Line Items]
Debt repayment					$ 11,700,000