Accounting Policies [Abstract] Summary of significant accounting policies Significant Accounting Policies [Text Block] Debt Disclosure [Abstract] Long term debt Long-term Debt [Text Block] Disposal Group, Including Discontinued Operation, Additional Disclosures [Abstract] Income statement, balance sheet and additional disclosures Schedule of Disposal Groups, Including Discontinued Operations, Income Statement, Balance Sheet and Additional Disclosures [Table Text Block] Statement of Financial Position [Abstract] Assets Assets [Abstract] Current assets Assets, Current [Abstract] Cash and cash equivalents Cash and Cash Equivalents, at Carrying Value Accounts receivable trade, net of allowance for doubtful accounts of $3,573 and $2,491 as of September 30, 2012 and December 31, 2011, respectively Accounts Receivable, Net, Current Inventories, net Inventory, Net Income taxes recoverable Income Taxes Receivable, Current Deferred income taxes Deferred Tax Assets, Net of Valuation Allowance, Current Prepaid and other assets Prepaid Expense and Other Assets, Current Total current assets Assets, Current Property, plant and equipment, net Property, Plant and Equipment, Net Goodwill Goodwill Deferred income taxes Deferred income taxes Deferred income taxes. Intangible and other assets, net Other Assets, Noncurrent Total assets Assets Liabilities and Shareholders' Equity Liabilities and Equity [Abstract] Current liabilities Liabilities, Current [Abstract] Current portion of long term debt Long-term Debt and Capital Lease Obligations, Current Accounts payable Accounts Payable, Current Deferred revenue Deferred Revenue, Current Warranty reserves Product Warranty Accrual, Current Income taxes payable Accrued Income Taxes, Current Accrued and other current liabilities Accrued Liabilities, Current Total current liabilities Liabilities, Current Long term debt Long-term Debt and Capital Lease Obligations Other liabilities Other Liabilities, Noncurrent Deferred income taxes Deferred Tax Liabilities, Net, Noncurrent Total liabilities Liabilities Commitments and contingencies (Note 11) Commitments and Contingencies Shareholders' equity Stockholders' Equity Attributable to Parent [Abstract] Common shares; no par value; unlimited shares authorized; 38,745 and 38,569 shares issued and outstanding at September 30, 2012 and December 31, 2011, respectively Common Stock, Value, Issued Retained earnings Retained Earnings (Accumulated Deficit) Accumulated comprehensive income Accumulated Other Comprehensive Income (Loss), Net of Tax Total shareholders' equity Stockholders' Equity Attributable to Parent Total liabilities and shareholders' equity Liabilities and Equity Segment Reporting [Abstract] Reconciliation of Revenue from Segments to Consolidated [Table] Reconciliation of Revenue from Segments to Consolidated [Table] Geographical [Axis] Geographical [Axis] Segment, Geographical [Domain] Segment, Geographical [Domain] Canada [Member] CANADA United States [Member] UNITED STATES South America [Member] South America [Member] South America [Member] Mexico [Member] MEXICO Asia Pacific [Member] Asia Pacific [Member] Asia Pacific [Member] Europe, Africa and Middle East [Member] Europe, Africa and Middle East [Member] Europe, Africa and Middle East [Member] Russia [Member] Russia [Member] Russia [Member] Segment Reporting, Revenue Reconciling Item [Line Items] Segment Reporting, Revenue Reconciling Item [Line Items] Total revenue Revenues Statement of Stockholders' Equity [Abstract] Statement [Table] Statement [Table] Equity Components [Axis] Equity Components [Axis] Equity Component [Domain] Equity Component [Domain] Common shares [Member] Common Stock [Member] Retained earnings [Member] Retained Earnings [Member] Accumulated comprehensive income [Member] Accumulated Other Comprehensive Income (Loss) [Member] Statement [Line Items] Increase (Decrease) in Stockholders' Equity [Roll Forward] Beginning balance (in shares) Common Stock, Shares, Outstanding Beginning balance Net income Net Income (Loss) Attributable to Parent Stock compensation related activity (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period Stock compensation related activity Stock Issued During Period, Value, Stock Options Exercised Ending balance (in shares) Ending balance Income Tax Disclosure [Abstract] Current tax provision Current Income Tax Expense (Benefit) Deferred tax provision Deferred Income Tax Expense (Benefit) Income tax provision Income Tax Expense (Benefit) Details of Certain Accounts [Abstract] -- None. No documentation exists for this element. -- Accrued payroll and benefits Accrued payroll and benefits Accrued payroll and benefits Accrual for foreign withholding tax claim Accrual for foreign withholding tax claim Accrual for foreign withholding tax claim Accrued taxes other than income taxes Accrued Taxes Other Than Income Taxes Current Accrued Taxes Other Than Income Taxes Current Other current liabilities Other Accrued Liabilities, Current Accrued liabilities, current Property, Plant and Equipment [Abstract] Net book value of used top drives sold from rental fleet Net Book Value of Used Top Drives Sold from Rental Fleet Net Book Value of Used Top Drives Sold from Rental Fleet included in it the cost of sales and services on the unaudited condensed consolidated statements of income. Number of used top drives sold Number of Used Top Drives Sold Number of Used Top Drives Sold from the rental fleet. Inventory Disclosure [Abstract] Inventories Inventory Disclosure [Text Block] Reserves for excess and obsolete inventories Inventory Valuation Reserves Raw materials Inventory, Raw Materials, Net of Reserves Work in progress Inventory, Work in Process, Net of Reserves Finished goods Inventory, Finished Goods, Net of Reserves Inventory, net Segment information Segment Reporting Disclosure [Text Block] Prepaid taxes other than income Prepaid taxes other than income Prepaid taxes other than those attributed to income taxes Deposits Deposits Prepaid Deposits Prepaid Prepaid insurance Prepaid Insurance Other prepaid expenses Other Prepaid Expense, Current Restricted cash Restricted Cash and Cash Equivalents, Current Deferred job costs Deferred job costs Deferred job costs Non-trade receivables Non-trade receivables1 Non-trade receivables1 Prepaid expense and other assets, current Product Warranties Disclosures [Abstract] Schedule of product warranty liability Schedule of Product Warranty Liability [Table Text Block] Income taxes Income Tax Disclosure [Text Block] Commitments and Contingencies Disclosure [Abstract] Commitments and contingencies Commitments and Contingencies Disclosure [Text Block] Warranties Product Warranty Disclosure [Text Block] Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Table] Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Table] Subsequent Event Type [Axis] Subsequent Event Type [Axis] Subsequent Event Type [Domain] Subsequent Event Type [Domain] Subsequent Event [Member] Subsequent Event [Member] Disposal Group Name [Axis] Disposal Group Name [Axis] Disposal Groups, Including Discontinued Operations, Name [Domain] Disposal Groups, Including Discontinued Operations, Name [Domain] CASING DRILLING TM [Member] Casing Drilling [Member] Casing Drilling [Member] Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] Total Cash Consideration Disposal Group, Including Discontinued Operation, Disposal Price Disposal Group, Including Discontinued Operation, Disposal Price Fixed assets, net Disposal Group, Including Discontinued Operation, Property, Plant, and Equipment, Net Inventories, net Disposal Group, Including Discontinued Operation, Inventory Accounts receivable, net Disposal Group, Including Discontinued Operation, Accounts, Notes and Loans Receivable, Net Transaction costs Disposal Group, Including Discontinued Operation, Transaction Costs Disposal Group, Including Discontinued Operation, Transaction Costs Gain on sale of CASING DRILLING Discontinued Operation, Gain (Loss) from Disposal of Discontinued Operation, before Income Tax Cash received at time of sale Disposal Group, Including Discontinued Operations, Cash Received At Time Of Sale Disposal Group, Including Discontinued Operations, Cash Received At Time Of Sale Cash to be received after terms and conditions met Disposal Group, Including Discontinued Operation, To Be Cash Received After Terms And Conditions Met Disposal Group, Including Discontinued Operation, CashTo Be Received After Terms And Conditions Met Cash received after sale Disposal Group, Including Discontinued Operations, Cash Received Subsequent to Time Of Sale Disposal Group, Including Discontinued Operations, Cash Received Subsequent to Time Of Sale Gain (loss) on disposition of assets Gain (Loss) on Disposition of Assets Schedule of long-term debt instruments Schedule of Long-term Debt Instruments [Table Text Block] Loss Contingencies [Table] Loss Contingencies [Table] Balance Sheet Location [Axis] Balance Sheet Location [Axis] Balance Sheet Location [Domain] Balance Sheet Location [Domain] Other liabilities [Member] Other Accrued Liabilities [Member] Other Accrued Liabilities [Member] Income Statement Location [Axis] Income Statement Location [Axis] Income Statement Location [Domain] Income Statement Location [Domain] Interest income [Member] Interest Income [Member] Other income [Member] Other Income [Member] Interest expense [Member] Interest Expense [Member] Litigation Case [Axis] Litigation Case [Axis] Litigation Case Type [Domain] Litigation Case Type [Domain] Administrative subpoena, department of the treasury office of foreign assets control [Member] Administrative Subpoena, Department of the Treasury Office of Foreign Assets Control [Member] Administrative Subpoena, Department of the Treasury Office of Foreign Assets Control [Member] Legal suit, U.S. district court for the eastern district of Texas [Member] Legal Suit US District Court For the Eastern District Of Texas, Marshall Division [Member] Legal Suit US District Court For the Eastern District Of Texas, Marshall Division [Member] Legal suit, U.S. district court for the southern district of Texas [Member] Legal Suit, Us District Court for the Southern District of Texas [Member] Legal Suit, U.S. District Court for the Southern District of Texas [Member] Reassessment appeal, Mexican tax court [Member] Reassessment Appeal, Mexican Tax Court [Member] Reassessment Appeal, Mexican Tax Court [Member] Exportation claim, Mexican tax court [Member] Exportation Claim, Mexican Tax Court [Member] Exportation Claim, Mexican Tax Court [Member] Foreign withholding tax claim [Member] Foreign Withholding Tax Claim [Member] Foreign Withholding Tax Claim [Member] Tax assessment, norwegian tax authorities [Member] Tax Assessment, Norwegian Tax Authorities [Member] Tax Assessment, Norwegian Tax Authorities [Member] Loss Contingencies [Line Items] Loss Contingencies [Line Items] Loss contingency, maximum percent of claims to current assets Loss Contingency, Maximum ratio of Claims to Current Assets Loss Contingency, Maximum ratio of Claims to Current Assets Number of top drive units sold Number Of Top Drive Units Sold Number Of Top Drive Units Sold Regional offices that dispatched technicians outside the United States Regional Offices That Dispatched Technicians Outside the United States Regional Offices That Dispatched Technicians Outside the United States Canadian top drive sales to Sudan, as a percent of total revenue Canadian top drive sales to Sudan, as a percent of total revenue Canadian top drive sales to Sudan, as a percent of total revenue Number of alleged patent infringements Number of Alleged Patent Infringements Defendant Number of Alleged Patent Infringements Defendant Specified period of purchase agreement Legal settlement, specified period of purchase agreement Legal settlement, specified period of purchase agreement Percentage of total worldwide top drive requirements to be purchased for specified period Legal settlement, percentage of total worldwide top drive requirements to be purchased for specified period Legal settlement, percentage of total worldwide top drive requirements to be purchased for specified period Deposit paid to Mexican tax authorities for appeal Deposit paid to Mexican tax authorities for appeal Deposit paid to Mexican tax authorities for appeal Refund received from Mexican tax authorities Refund received from Mexican tax authorities Refund received from Mexican tax authorities Interest earned on deposit made to Mexican tax authorities Interest earned on deposit made to Mexican tax authorities Interest earned on deposit made to Mexican tax authorities Resolution by Mexican tax authorities, additional amount of interest and inflation adjustments owed and retained for second reassessment Resolution by Mexican tax authorities, additional amount of interest and inflation adjustments owed and retained for second reassessment Resolution by Mexican tax authorities, additional amount of interest and inflation adjustments owed and retained for second reassessment Claim for fines and penalties related to equipment in Mexico Claim for fines and penalties related to equipment in Mexico Claim for fines and penalties related to equipment in Mexico Carrying value, provision Loss Contingency Accrual, Carrying Value, Provision Accrual for foreign withholding tax claim Loss Contingency Accrual, at Carrying Value Reversal for foreign withholding tax claim Reversal for foreign withholding tax claim Reversal for foreign withholding tax claim Tax assessment from Norwegian tax authorities Tax assessment from Norwegian tax authorities Tax assessment from Norwegian tax authorities Maximum exposure under outstanding letters of credit Other contingencies, maximum exposure under outstanding letters of credit Other contingencies, maximum exposure under outstanding letters of credit Income Tax Examination [Table] Income Tax Examination [Table] Accrued and other current liabilities [Member] Accrued and Other Current Liabilities [Member] Accrued and Other Current Liabilities [Member] Other liabilities [Member] Other Liabilities [Member] Income Tax Authority [Axis] Income Tax Authority [Axis] Income Tax Authority [Domain] Income Tax Authority [Domain] Foreign tax authority [Member] Foreign Tax Authority [Member] Income Tax Examination [Line Items] Income Tax Examination [Line Items] Effective income tax rate Effective Income Tax Rate, Continuing Operations Percentage impact on effective tax rate Percentage Impact on Effective Tax Rate Percentage Impact on Effective Tax Rate - The change in the effective income tax rate. as compared to the prior reporting period. Increase in tax liability Income Tax Examination, Increase (Decrease) in Liability from Prior Year Accrual for uncertain tax positions Liability for Uncertain Tax Positions, Noncurrent Legal settlements during period Unrecognized Tax Benefits, Decreases Resulting from Settlements with Taxing Authorities Reconciliation of operating profit (loss) from segments to consolidated Reconciliation of Operating Profit (Loss) from Segments to Consolidated [Table Text Block] Schedule of revenues from external customers and long-lived assets by geographical areas Schedule of Revenue from External Customers and Long-Lived Assets, by Geographical Areas [Table Text Block] Property, plant and equipment Property, Plant and Equipment Disclosure [Text Block] Organization, Consolidation and Presentation of Financial Statements [Abstract] Nature of operations and basis of preparation Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] Document Information [Table] Document Information, Document [Axis] Document Information, Document [Axis] Document [Domain] Document [Domain] Document Information [Line Items] Document Information [Line Items] Entity Registrant Name Entity Registrant Name Entity Central Index Key Entity Central Index Key Current Fiscal Year End Date Current Fiscal Year End Date Entity Filer Category Entity Filer Category Document Type Document Type Document Period End Date Document Period End Date Document Fiscal Year Focus Document Fiscal Year Focus Document Fiscal Period Focus Document Fiscal Period Focus Amendment Flag Amendment Flag Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Schedule of prepaid and other current assets Schedule of Prepaid and Other Current Assets [Table Text Block] Schedule of Prepaid and Other Current Assets [Table Text Block] Schedule of accrued liabilities Schedule of Accrued Liabilities [Table Text Block] Schedule of Product Warranty [Table] Schedule of Product Warranty [Table] Schedule of Product Warranty [Table] Products and Services [Axis] Products and Services [Axis] Products and Services [Domain] Products and Services [Domain] Gear box housing for new ESI model [Member] Gear Box Housing For New ESI Model [Member] Gear Box Housing For New ESI Model [Member] Product Warranty [Line Items] Product Warranty [Line Items] Product Warranty [Line Items] [Line Items] Movement in Standard Product Warranty Accrual [Roll Forward] Movement in Standard Product Warranty Accrual [Roll Forward] Balance as of January 1, 2012 Charged to expense, net Product Warranty Accrual, Warranties Issued Deductions Product Warranty Accrual, Payments Balance as of June 30, 2012 Product warranty expense Product Warranty Expense Units produced Product Warranty, Units Produced Product Warranty, Units Produced Recent accounting pronouncements New Accounting Pronouncements, Policy [Policy Text Block] Sale of operating assets Sale of Operating Assets [Policy Text Block] Sale of Operating Assets [Policy Text Block] Fair value of financial instruments Fair Value of Financial Instruments, Policy [Policy Text Block] Details of certain accounts Supplemental Balance Sheet Disclosures [Text Block] Schedule of Long-term Debt Instruments [Table] Schedule of Long-term Debt Instruments [Table] Range [Axis] Range [Axis] Range [Domain] Range [Domain] Minimum [Member] Minimum [Member] Maximum [Member] Maximum [Member] Long-term Debt, Type [Axis] Long-term Debt, Type [Axis] Long-term Debt, Type [Domain] Long-term Debt, Type [Domain] Capital leases [Member] Capital Lease Obligations [Member] Other notes payable [Member] Notes Payable, Other Payables [Member] Credit revolver [Member] Revolving Credit Facility [Member] Business Acquisition [Axis] Business Acquisition [Axis] Business Acquisition, Acquiree [Domain] Business Acquisition, Acquiree [Domain] Premiere [Member] Premiere [Member] Premiere [Member] Debt Instrument [Line Items] Debt Instrument [Line Items] Outstanding debt assumed Business Acquisition, Long Term Debt Assumed Business Acquisition, Long Term Debt Assumed Outstanding long term debt and capital lease obligations Current and non-current portion of long term debt and capital lease obligations assumed Current and non-current portion of long term debt and capital lease obligations assumed Long-term debt Long-term Debt Current borrowing capacity Line of Credit Facility, Current Borrowing Capacity Swing line loans, current borrowing capacity Line of Credit Facility, Swing Line Loans, Current Borrowing Capacity Line of Credit Facility, Swing Line Loans, Current Borrowing Capacity Line of credit facility term Line of Credit Facility, Term Line of Credit Facility, Term Unused capacity, commitment fee percentage Line of Credit Facility, Unused Capacity, Commitment Fee Percentage Letter of credit fee percentage Line Of Credit Facility, Letter Of Credit Fee Percentage Line Of Credit Facility, Letter Of Credit Fee Percentage Maximum borrowing capacity, reduced by letters of credit Line Of Credit Facility, Maximum Borrowing Capacity, Reduced By Letters of Credit Line Of Credit Facility, Maximum Borrowing Capacity, Reduced By Letters of Credit Line of credit facility, amount outstanding Line of Credit Facility, Amount Outstanding Letters of credit, amount outstanding Letters of Credit Outstanding, Amount Available borrowing capacity Debt Instrument, Unused Borrowing Capacity, Amount Sale of CASING DRILLING Disposal Groups, Including Discontinued Operations, Disclosure [Text Block] Earnings Per Share [Abstract] Schedule of weighted average number of shares Schedule of Weighted Average Number of Shares [Table Text Block] Reconciliation of Other Significant Reconciling Items from Segments to Consolidated [Table] Reconciliation of Other Significant Reconciling Items from Segments to Consolidated [Table] Business Segments [Axis] Business Segments [Axis] Segment [Domain] Segment [Domain] Top Drive [Member] Top Drive [Member] Top Drive [Member] Tubular Services [Member] Tubular Services [Member] Tubular Services [Member] Overhead, Corporate and Other [Member] Corporate and Other [Member] Segment Reporting, Other Significant Reconciling Item [Line Items] Segment Reporting, Other Significant Reconciling Item [Line Items] Total property, plant and equipment, net Capital leases Other notes payable Current portion of long term debt Non-current portion of long term debt Earnings per share Earnings Per Share [Text Block] Property, plant and equipment Property, Plant and Equipment [Table Text Block] Depreciation and amortization expense Depreciation and Amortization Expense [Table Text Block] Depreciation and Amortization Expense [Table Text Block] Schedule of inventory, current Schedule of Inventory, Current [Table Text Block] Schedule of Property, Plant and Equipment [Table] Schedule of Property, Plant and Equipment [Table] Property, Plant and Equipment, Type [Axis] Property, Plant and Equipment, Type [Axis] Property, Plant and Equipment, Type [Domain] Property, Plant and Equipment, Type [Domain] Land, buildings and leaseholds [Member] Land Buildings And Leaseholds [Member] Land Buildings And Leaseholds [Member] Drilling equipment [Member] Drilling equipment [Member] Drilling equipment [Member] Manufacturing equipment [Member] Manufacturing equipment [Member] Manufacturing equipment [Member] Office equipment and other [Member] Office Equipment And Other [Member] Office Equipment And Other [Member] Capital work in progress [Member] Asset under Construction [Member] Property, Plant and Equipment [Line Items] Property, Plant and Equipment [Line Items] Property, plant and equipment, at cost Property, Plant and Equipment, Gross Less: Accumulated depreciation Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Property, plant and equipment, net Basic weighted average number of shares outstanding (in shares) Weighted Average Number of Shares Outstanding, Basic Dilutive effect of stock-based compensation (in shares) Incremental Common Shares Attributable to Share-based Payment Arrangements Diluted weighted average number of shares outstanding (in shares) Weighted Average Number of Shares Outstanding, Diluted Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Antidilutive Securities [Axis] Antidilutive Securities [Axis] Antidilutive Securities, Name [Domain] Antidilutive Securities, Name [Domain] Stock options [Member] Stock Options [Member] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Anti-dilutive options excluded from calculation due to exercise prices (in shares) Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Assets [Abstract] Assets, Current [Abstract] Accounts receivable trade, allowance for doubtful accounts Allowance for Doubtful Accounts Receivable, Current Liabilities and Equity [Abstract] Stockholders' Equity Attributable to Parent [Abstract] Common shares, no par value Common Stock, No Par Value Common shares, issued (in shares) Common Stock, Shares, Issued Income Statement [Abstract] Revenue Revenues [Abstract] Products Sales Revenue, Goods, Net Services Sales Revenue, Services, Net Total revenue Operating expenses Operating Expenses [Abstract] Cost of sales and services Cost of Goods and Services Sold [Abstract] Products Cost of Goods Sold Services Cost of Services Total cost of sales and services Cost of Goods and Services Sold Selling, general and administrative Selling, General and Administrative Expense Gain on sale of CASING DRILLINGTM Research and engineering Research and Development Expense Total operating expenses Operating Expenses Operating income Operating Income (Loss) Other expense (income) Other Nonoperating Income (Expense) [Abstract] Interest expense Interest Expense Interest income Investment Income, Interest Foreign exchange loss (gain) Foreign Currency Transaction Gain (Loss), before Tax Other expense (income) Other Nonoperating Income (Expense) Total other expense Nonoperating Income (Expense) Income before income taxes Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest Income tax provision Net income Earnings per share: Basic Earnings Per Share, Basic Diluted Earnings Per Share, Diluted Weighted average number of shares: Weighted Average Number of Shares Outstanding, Diluted [Abstract] Basic Diluted Statement of Cash Flows [Abstract] Operating Activities Net Cash Provided by (Used in) Operating Activities [Abstract] Adjustments to reconcile net income to net cash provided by (used for) operating activities: Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Depreciation and amortization Depreciation, Depletion and Amortization Stock compensation expense Share-based Compensation Bad debt expense Provision for Doubtful Accounts Deferred income taxes Amortization of financial items Amortization of Financing Costs Gain on sale of operating assets Gain (Loss) on Sale of Property Plant Equipment Changes in operating assets and liabilities: Increase (Decrease) in Operating Capital [Abstract] Accounts receivable trade, net Increase (Decrease) in Accounts Receivable Inventories Increase (Decrease) in Inventories Prepaid and other current assets Increase (Decrease) in Prepaid Expense and Other Assets Accounts payable and accrued liabilities Increase (Decrease) in Accounts Payable and Accrued Liabilities Income taxes recoverable Increase (Decrease) in Income Taxes Payable Other noncurrent assets and liabilities, net Increase (Decrease) in Other Noncurrent Assets and Liabilities, Net Net cash provided by (used for) operating activities Net Cash Provided by (Used in) Operating Activities Investing Activities Net Cash Provided by (Used in) Investing Activities [Abstract] Additions to property, plant and equipment Payments to Acquire Property, Plant, and Equipment Proceeds on sale of operating assets Proceeds from Sale of Productive Assets Proceeds on sale of CASING DRILLING TM, net of transaction costs Proceeds from Divestiture of Businesses and Interests in Affiliates Other, net Payments for (Proceeds from) Other Investing Activities Net cash provided by (used for) investing activities Net Cash Provided by (Used in) Investing Activities Financing Activities Net Cash Provided by (Used in) Financing Activities [Abstract] Issuances of debt Proceeds from Issuance of Long-term Debt Repayments of debt Repayments of Long-term Debt Proceeds from exercise of stock options Proceeds from Stock Options Exercised Net cash provided by (used for) financing activities Net Cash Provided by (Used in) Financing Activities Change in cash and cash equivalents Cash and Cash Equivalents, Period Increase (Decrease) Net cash and cash equivalents, beginning of period Net cash and cash equivalents, end of period Supplemental cash flow information Supplemental Cash Flow Information [Abstract] Cash payments for interest Interest Paid Cash payments for income taxes Income Taxes Paid Cash received for income tax refunds Proceeds from Income Tax Refunds Property, plant and equipment accrued in accounts payable Capital Expenditures Incurred but Not yet Paid Reconciliation of Operating Profit (Loss) from Segments to Consolidated [Table] Reconciliation of Operating Profit (Loss) from Segments to Consolidated [Table] Research & Engineering [Member] Research & Engineering [Member] Research & Engineering [Member] Corporate and Other [Member] Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] Number of operating segments Number of Operating Segments Revenue Operating income (loss) Other expense (income) Income before income taxes Gain on sale of assets Cost of sales and services Cost of Goods and Services Sold, Depreciation and Amortization Selling, general and administrative expense Selling, General and Administrative Expense, Depreciation and Amortization Selling, General and Administrative Expense, Depreciation and Amortization Depreciation and amortization Schedule of components of income tax expense (benefit) Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]