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Impairments and Other Charges (Details) $ in Thousands | 3 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Mar. 31, 2016 USD ($) | Dec. 31, 2017 USD ($) | Dec. 31, 2016 USD ($) item | Dec. 31, 2015 USD ($) item VEF / $ | Sep. 30, 2015 VEF / $
Tangible Assets And Equipment |  |  |  |  |
Provision for retirement of assets |  |  | $ 69,072 | $ 65,633 |
Impairment of long-lived assets |  | $ 6,895 | 216,355 | 74,464 |
Subtotal |  | 6,895 | 285,427 | 140,097 |
Other Charges: |  |  |  |  |
Other-than-temporary impairment |  |  | 219,737 | 180,591 |
Provision for international operations |  |  |  | 48,279 |
Transaction related costs |  | 21,628 |  |  |
Loss (gain) on early extinguishment of debt |  | 16,013 | (6,665) |  |
Total impairments and other charges |  | 44,536 | 498,499 | 368,967 |
Payment of principal and accrued and unpaid interest of senior notes |  | 381,814 | 493,612 | 27,478 |
Loss (gain) on early extinguishment of debt |  | (16,013) | $ 6,665 |  |
Number of remaining SCR rigs retired | item |  |  | 24 |  |
Number of older rigs retired | item |  |  | 7 |  |
Charge for remeasurement of net monetary assets |  |  |  | $ 10,000 |
Official exchange rate of Bolivares per USD | VEF / $ |  |  |  | 6.3 |
SIMADI exchange rate of Bolivares per USD | VEF / $ |  |  |  |  | 199
Write-off of receivable |  |  |  | $ 15,400 |
Provision for exit of non-core business line |  |  |  | 22,900 |
C&J Energy Services, Ltd. |  |  |  |  |
Other Charges: |  |  |  |  |
Other-than-temporary impairment | $ 153,400 |  | $ 192,400 | 180,600 |
Total impairments and other charges |  |  | 216,200 |  |
Affiliate Receivable |  |  | 23,800 |  |
Venezuela |  |  |  |  |
Other Charges: |  |  |  |  |
Provision for assets and receivable impacted by degradation of overall country economy |  |  |  | 25,400 |
North Slope of Alaska |  |  |  |  |
Tangible Assets And Equipment |  |  |  |  |
Provision for retirement of assets |  |  | 22,400 | 15,100 |
United States |  |  |  |  |
Tangible Assets And Equipment |  |  |  |  |
Provision for retirement of assets |  |  | 25,365 | $ 47,247 |
Impairment of long-lived assets |  |  | 163,182 |  |
Number of Competitive Assets | item |  |  |  | 47 |
Subtotal |  |  | 188,547 | $ 47,247 |
Canada |  |  |  |  |
Tangible Assets And Equipment |  |  |  |  |
Provision for retirement of assets |  |  | 19,573 | 7,547 |
Impairment of long-lived assets |  |  | 1,125 |  |
Subtotal |  |  | 20,698 | 7,547 |
International |  |  |  |  |
Tangible Assets And Equipment |  |  |  |  |
Provision for retirement of assets |  |  | 23,275 | 10,839 |
Impairment of long-lived assets |  |  | 12,721 | 52,479 |
Subtotal |  |  | 35,996 | 63,318 |
Drilling Solutions |  |  |  |  |
Tangible Assets And Equipment |  |  |  |  |
Provision for retirement of assets |  |  | 859 |  |
Subtotal |  |  | 859 |  |
Rig Technologies |  |  |  |  |
Tangible Assets And Equipment |  |  |  |  |
Impairment of long-lived assets |  |  | 15,343 | 3,879 |
Subtotal |  |  | 15,343 | 3,879 |
Other |  |  |  |  |
Tangible Assets And Equipment |  |  |  |  |
Impairment of long-lived assets |  |  | 23,984 | 18,106 |
Subtotal |  |  | 23,984 | 18,106 |
Senior Notes. |  |  |  |  |
Other Charges: |  |  |  |  |
Loss (gain) on early extinguishment of debt |  | 16,000 |  |  |
Principal amount repurchased |  | 367,900 | 152,700 | 27,500 |
Payment of principal and accrued and unpaid interest of senior notes |  | 381,700 | $ 157,500 | $ 27,500 |
Loss (gain) on early extinguishment of debt |  | $ (16,000) |  |  |

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