Value of conversion of convertible debentures into common stock. No authoritative reference available. No authoritative reference available. No authoritative reference available. Multiclient Seismic Data, Capitalized in period No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. The United States federal statutory tax rate applicable under enacted tax laws to the Company's pretax income from continuing operations for the period. The "statutory" tax rate shall be the regular tax rate if there are alternative tax systems. No authoritative reference available. No authoritative reference available. No authoritative reference available. Schedule of Intangible Assets by Major Class No authoritative reference available. Business Acquisition, Cost of Acquired Entity, Shares Distributed No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Elemination Of Tax Deduction No authoritative reference available. No authoritative reference available. No authoritative reference available. Impact Of Asset Impairment Charges On Diluted Earnings Per Share No authoritative reference available. The portion of earnings (loss) from continuing operations before income taxes that is attributable to United States operations. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Disclosure of the carrying amount of multiclient seismic data based on completed and in-process seismic surveys. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Intangible Assets, Gross (Excluding Goodwill) No authoritative reference available. Amount charged against earnings in the period relating to items of an unusual nature. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Inventory Write Up No authoritative reference available. Gain Loss On Investments, Net Of Tax No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Business Acquisition, Cost of Acquired Entity, Stock Per Share No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Workforce Reductions Cost No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Schedule of Derivative Instruments, Effect on Income and Other Comprehensive Income No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Reconciliation of Earnings Per Share No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Intangible assets, estimated useful life No authoritative reference available. No authoritative reference available. No authoritative reference available. ImpairmentCharges No authoritative reference available. Total Of Components Of Deferred Income Taxes No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. The number of common stock shares issued upon the conversion of convertible debentures. No authoritative reference available. No authoritative reference available. No authoritative reference available. Cumulative Effect Of Change In Income Statment Dilutive No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Impact Of Unrealized Gain Loss On Investments On Diluted Earnings Per Share No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Business Combination, Preliminary Allocation of the Purchase Price Disclosure [Text Block] No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Disclosure of the carrying amount of multiclient seismic data based on completed and in-process seismic surveys. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Total Shares Outstanding No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Conversion Of Convertible Debentures Into Cash, Value No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Amount charged against earnings in the period relating to items of an unusual nature, tax. No authoritative reference available. Gain on Earnings on Equity Interest in Joint Venture After Tax No authoritative reference available. No authoritative reference available. No authoritative reference available. Components of Consolidated Income Taxes No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. This block of text may be used to disclose all or part of the information related to goodwill. No authoritative reference available. Capitalized costs directly incurred in acquiring and processing of seismic surveys that are licensed on a nonexclusive basis, net of amortization. No authoritative reference available. Exchange Ratio No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Impact Of Postretiremet Benefits Curtailment On Diluted Earnings Per Share No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Gain on investment No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Net Pretax Credit No authoritative reference available. Postretiremet Benefits Curtailment No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Deferred Tax Assets, Multiclient Seismic Data No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Components of net deferred tax assets No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Multiclient Seismic Data, Charged to cost of goods sold and services No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Schedule of Amortization Expense No authoritative reference available. Summary Of Charges And Credits No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Severance And Other Cost No authoritative reference available. Income (Loss) from Continuing Operations before Income Taxes and Minority Interest No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Business Acquisition Purchase Price Allocation Investment No authoritative reference available. No authoritative reference available. No authoritative reference available. Mexico Restructuring No authoritative reference available. No authoritative reference available. No authoritative reference available. Acquisition of merger No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Fixed rate debt No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Business Acquisition Purchase Price Allocation Noncontrolling Interest No authoritative reference available. Income Tax Disclosure Table. No authoritative reference available. No authoritative reference available. No authoritative reference available. Stockholders Equity Shares Other No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Other Charges No authoritative reference available. Deferred Tax Assets, Intangible Assets No authoritative reference available. Impact Of Other Deductions And Charges On Diluted Earnings Per Share No authoritative reference available. Business Acquisition Purchase Price Allocation Current Liabilities Accounts Payable And Accrued Liabilities No authoritative reference available. The net cash outflow from capitalized costs directly incurred in acquiring and processing of seismic surveys that are licensed on a nonexclusive basis. No authoritative reference available. Impact Of Employee Severance On Diluted Earnings Per Share No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Business Acquisition, Purchase Price Allocation Sub-Total No authoritative reference available. Business Acquisition, Purchase Price Allocation, Other Assets No authoritative reference available. No authoritative reference available. No authoritative reference available. Amount charged against earnings in the period relating to items of an unusual nature, pretax. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Fair Value of Equivalent Stock Options Issued No authoritative reference available. No authoritative reference available. No authoritative reference available. Schedule of Fair Value of the Consideration Transferred to Effect the Merger With Smith [Text Block] No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Gain on Earnings on Equity Interest in Joint Venture Pretax No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Repurchase of interest rate derivative No authoritative reference available. Reconciliation of the US Statutory Federal Tax Rate No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Schedule of Depreciation Expense No authoritative reference available. Business Acquisition, Purchase Price Allocation, Intangible Assets No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Number of shares of stock held by shareholders. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Pension Disclosure No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Includes operating interest income earned as part of a core business activity, equity income representing the undistributed income or loss of investments which are accounted for under the equity method of accounting, and other miscellaneous income or loss earned from core business activities. No authoritative reference available. No authoritative reference available. No authoritative reference available. Impact Of Elemination Of Tax Deduction On Diluted Earnings Per Share No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Business Acquisition Pro Forma Profit Loss No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. The amount of amortization expense expected to be recognized during the remainder of the year. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Impact Of Gain Loss On Repurchase Of Bond On Diluted Earnings Per Share No authoritative reference available. Net assets purchased during the period, excluding net assets acquired in business combinations. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Defined Benefit Plan, Net Periodic Benefit Cost before Curtailments No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Describes any existing condition, situation, or set of circumstances involving uncertainty as of the balance sheet date (or prior to issuance of the financial statements) as to a probable or reasonably possible gain or loss incurred by an entity and typically discloses the amount of range of possible gain or loss recorded. No authoritative reference available. Other Postretirement Benefits Disclosure No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Increase (Decrease) in Notes Payable No authoritative reference available. The portion of earnings (loss) from continuing operations before income taxes that is attributable to foreign operations, which is defined as income (loss) generated from operations located outside the United States. No authoritative reference available. No authoritative reference available. No authoritative reference available. Fair value adjustment, hedging, carrying amount No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Impact Of Restructuring Charges On Diluted Earnings Per Share No authoritative reference available. Impact Of Foreign Currency Transaction Gain Loss Before Tax On Diluted Earnings Per Share No authoritative reference available. Unvested Restricted Stock Units Outstanding No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Gain Loss On Repurchase Of Bond No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Variable rate debt No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Business Acquisition, Purchase Price Allocation, Deferred Income Tax Liabilities No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Impact Of Workforce Reductions On Diluted Earnings Per Share No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Stock Price Per Share No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. The net change in the beginning and end of period Other Current Assets balances. No authoritative reference available. Schedule Of Merger Related Charges [Text Block] No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Repurchase Senior Notes No authoritative reference available. Impact Of Severance And Other Cost On Diluted Earning Per Share No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Net Dilutive Effect On Earnings Per Share No authoritative reference available. No authoritative reference available. No authoritative reference available. Inventory Disclosure Table No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Schedule Of Charges Related To Workforce Reductions [Text Block] No authoritative reference available. Ownership Interest in Joint Venture No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available.