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Revenues - Additional Information (Detail) - USD ($) $ in Thousands | 3 Months Ended |
--- | --- | ---
Mar. 31, 2020 | Mar. 31, 2019 | Dec. 31, 2019
Disaggregation Of Revenue [Line Items] |  |  |
Accounts receivable balances | $ 319,072 |  | $ 339,699
Amount amortized and recorded in drilling revenue | 445,927 | $ 704,171 |
Contract Drilling |  |  |
Disaggregation Of Revenue [Line Items] |  |  |
Amount amortized and recorded in drilling revenue | 267,364 | 372,392 |
ASC Topic 606 Revenue from Contracts with Customers |  |  |
Disaggregation Of Revenue [Line Items] |  |  |
Accounts receivable balances | 317,000 |  | 336,000
ASC Topic 606 Revenue from Contracts with Customers | Accounts Payable |  |  |
Disaggregation Of Revenue [Line Items] |  |  |
Total contract liability | 1,300 |  | $ 2,700
ASC Topic 606 Revenue from Contracts with Customers | Contract Drilling |  |  |
Disaggregation Of Revenue [Line Items] |  |  |
Amount amortized and recorded in drilling revenue | $ 100 | $ 400 |
Maximum |  |  |
Disaggregation Of Revenue [Line Items] |  |  |
Accounts receivable payment terms | 60 days |  |
Minimum |  |  |
Disaggregation Of Revenue [Line Items] |  |  |
Accounts receivable payment terms | 30 days |  |

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