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v3.25.4

Share Based Compensation (Narrative) (Details) - USD ($) $ / shares in Units, $ in Millions | 12 Months Ended | 36 Months Ended |
--- | --- | --- | ---
Dec. 31, 2025 | Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2025 | Apr. 30, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant | 6,200,000 |  |  |  | 6,200,000 |
Recognized compensation expense | $ 7.7 | $ 10.6 | $ 11.7 |  |  |
Operating Expenses [Member] |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Recognized compensation expense | 17.9 | 17.5 | 15.8 |  |  |
Contract drilling expenses (exclusive of depreciation and reimbursable expenses) |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Recognized compensation expense | 9.3 | 8.8 | 6.8 |  |  |
General and administrative |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Recognized compensation expense | $ 8.6 | $ 8.7 | $ 9.0 |  |  |
Performance Based Awards |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Recognized compensation cost, weighted-average period, years | 1 year 7 months 6 days |  |  |  |  |
Unrecognized compensation cost on awards | $ 8.4 |  |  |  | $ 8.4 |
Granted (in dollars per share) | $ 28.92 | $ 63.05 | $ 62.09 |  |  |
Share option awards, exercisable, increment | 3 years |  |  |  |  |
Non Vested Share Awards, Equity Classified [Member] |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Recognized compensation cost, weighted-average period, years | 1 year 4 months 24 days |  |  |  |  |
Unrecognized compensation cost on awards | $ 28.3 |  |  |  | $ 28.3 |
Management Incentive Plan |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized |  |  |  |  |  | 9,000,000.0
Management Incentive Plan | Maximum |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Share-Based Compensation Awards, Performance Targets |  |  |  | 150.00% | 200.00% |
Management Incentive Plan | Minimum |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Share-Based Compensation Awards, Performance Targets |  |  |  | 0.00% | 0.00% |
Non Vested Share Awards, Equity Classified [Member] |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Granted (in dollars per share) | $ 43.58 | $ 69.89 | $ 63.22 |  |  |

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