Segment Reporting [Abstract] Schedule of Segment Reporting Information, by Segment [Table] Schedule of Segment Reporting Information, by Segment [Table] Segments [Axis] Segments [Axis] Segments [Domain] Segments [Domain] Drilling Services Segment [Member] Drilling Services Segment [Member] Drilling Services Segment [Member] Drilling Division Locations [Axis] Drilling Division Locations [Axis] Drilling Division Locations [Axis] Drilling Division Locations [Domain] Drilling Division Locations [Domain] Drilling Division Locations [Domain] South Texas [Member] South Texas [Member] South Texas [Member] West Texas [Member] West Texas [Member] West Texas [Member] North Dakota [Member] NORTH DAKOTA UTAH UTAH Appalachia [Member] Appalachia [Member] Appalachia [Member] Colombia [Member] COLOMBIA Segment Reporting Information [Line Items] Segment Reporting Information [Line Items] Identifiable assets Assets Drilling Rigs Drilling Rigs Drilling Rigs Revenues Revenues Guarantor Non-Guarantor Condensed Consolidated Financial Statements Guarantor Non Guarantor Condensed Consolidated Financial Statements Guarantor/Non-Guarantor Condensed Consolidated Financial Statements Supplemental Guarantor Information Disclosure [Text Block] Supplemental Guarantor Information Disclosure [Text Block] Debt Disclosure [Abstract] Long-term Debt Debt Disclosure [Text Block] Schedule of Long-term Debt Instruments [Table] Schedule of Long-term Debt Instruments [Table] Credit Facility [Axis] Credit Facility [Axis] Credit Facility [Domain] Credit Facility [Domain] Revolving Credit Facility [Member] Revolving Credit Facility [Member] Long-term Debt, Type [Axis] Long-term Debt, Type [Axis] Long-term Debt, Type [Domain] Long-term Debt, Type [Domain] Other Debt Obligations [Member] Other Debt Obligations [Member] Senior secured revolving credit facility [Member] Line of Credit [Member] Senior Notes [Member] Senior Notes [Member] Debt Instrument [Axis] Debt Instrument [Axis] Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Senior Notes, Issued [Member] Senior Notes, Issued [Member] Senior Notes, Issued [Member] Debt Instrument [Line Items] Debt Instrument [Line Items] Long-term Debt Long-term Debt Long-term Debt, Current Maturities Long-term Debt, Current Maturities Long-term Debt, Excluding Current Maturities Long-term Debt, Excluding Current Maturities Production Services Segment [Member] Production Services Division [Member] Production Services Division [Member] Products and Services [Axis] Products and Services [Axis] Products and Services [Domain] Products and Services [Domain] 550 Horsepower [Member] Five Hundred Fifty Horsepower [Member] Five Hundred Fifty Horsepower [Member] 600 Horsepower [Member] Six Hundred Horsepower [Member] Six Hundred Horsepower [Member] Property, Plant and Equipment, Type [Axis] Property, Plant and Equipment, Type [Axis] Property, Plant and Equipment, Type [Domain] Property, Plant and Equipment, Type [Domain] Fishing and Rental Tools and Equipment [Member] Fishing and Rental Tools and Equipment [Member] Fishing and Rental Tools and Equipment [Member] Drilling Rigs [Member] Drilling Rigs [Member] Drilling Rigs [Member] Assets Leased From Others [Member] Assets Leased From Others [Member] Assets Leased From Others [Member] Number of Reportable Segments Number of Reportable Segments Well Servicing Rigs Well Service Rigs Well Service Rigs Wireline Units Wireline Units Wireline Units Coiled Tubing Units Coiled Tubing Units Coiled Tubing Units Property, Plant and Equipment, Gross Property, Plant and Equipment, Gross Liabilities, Fair Value Disclosure [Abstract] Fair Value, by Balance Sheet Grouping [Table] Fair Value, by Balance Sheet Grouping [Table] Fair Value, Hierarchy [Axis] Fair Value, Hierarchy [Axis] Fair Value Hierarchy [Domain] Fair Value Hierarchy [Domain] Fair Value, Inputs, Level 2 [Member] Fair Value, Inputs, Level 2 [Member] Measurement Basis [Axis] Measurement Basis [Axis] Fair Value Measurement [Domain] Fair Value Measurement [Domain] Portion at Fair Value Measurement [Member] Portion at Fair Value Measurement [Member] Carrying Amount [Member] Reported Value Measurement [Member] Fair Value [Member] Estimate of Fair Value Measurement [Member] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Total debt Debt Instrument, Fair Value Disclosure Equity Transactions and Stock Based Compensation Plans [Abstract] Equity Transactions and Stock Based Compensation Plans [Abstract] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Award Type [Axis] Award Type [Axis] Award Type [Domain] Equity Award [Domain] Stock Options [Member] Employee Stock Option [Member] Restricted Stock [Member] Restricted Stock [Member] Restricted Stock Units (RSUs) [Member] Restricted Stock Units (RSUs) [Member] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Schedule of Compensation Cost for Share-based Payment Arrangements, Allocation of Share-based Compensation Costs by Plan Schedule of Compensation Cost for Share-based Payment Arrangements, Allocation of Share-based Compensation Costs by Plan [Table Text Block] Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block] Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block] Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value [Table Text Block] Schedule of Nonvested Share Activity [Table Text Block] Schedule of Share-based Compensation, Activity [Table Text Block] Schedule of Share-based Compensation, Activity [Table Text Block] Schedule of Share-based Compensation, Restricted Stock Units Award Activity [Table Text Block] Schedule of Share-based Compensation, Restricted Stock Units Award Activity [Table Text Block] Statement of Financial Position [Abstract] Preferred stock, shares authorized Preferred Stock, Shares Authorized Preferred stock, shares issued Preferred Stock, Shares Issued Preferred stock, shares outstanding Preferred Stock, Shares Outstanding Common stock, par value Common Stock, Par or Stated Value Per Share Common stock, shares authorized Common Stock, Shares Authorized Common stock, shares outstanding Common Stock, Shares, Outstanding Treasury stock, shares Treasury Stock, Shares Finite-Lived Intangible Assets, Accumulated Amortization Finite-Lived Intangible Assets, Accumulated Amortization Earnings Per Share [Abstract] 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 Excluded from Computation of Earnings Per Share, by Antidilutive Securities [Axis] Antidilutive Securities [Axis] Antidilutive Securities, Name [Domain] Antidilutive Securities, Name [Domain] Stock Compensation Plan [Member] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Segment Information Segment Reporting Disclosure [Text Block] Debt Instrument, Fair Value Disclosure [Abstract] Fair Value, by Balance Sheet Grouping Fair Value, by Balance Sheet Grouping [Table Text Block] Organization, Consolidation and Presentation of Financial Statements [Abstract] Basis of Presentation, Policy [Policy Text Block] Basis of Accounting, Policy [Policy Text Block] Use of Estimates, Policy [Policy Text Block] Use of Estimates, Policy [Policy Text Block] Cash and Cash Equivalents, Restricted Cash and Cash Equivalents, Policy [Policy Text Block] Cash and Cash Equivalents, Restricted Cash and Cash Equivalents, Policy [Policy Text Block] Inventory, Policy [Policy Text Block] Inventory, Policy [Policy Text Block] Trade and Other Accounts Receivable, Unbilled Receivables, Policy [Policy Text Block] Trade and Other Accounts Receivable, Unbilled Receivables, Policy [Policy Text Block] Foreign Currency Transactions and Translations Policy [Policy Text Block] Foreign Currency Transactions and Translations Policy [Policy Text Block] Cash and Cash Equivalents Disclosure [Text Block] Cash and Cash Equivalents Disclosure [Text Block] Revenue Recognition, Policy [Policy Text Block] Revenue Recognition, Policy [Policy Text Block] Trade and Other Accounts Receivable, Policy [Policy Text Block] Trade and Other Accounts Receivable, Policy [Policy Text Block] Property and Equipment, Policy [Policy Text Block] Property, Plant and Equipment, Policy [Policy Text Block] Intangible Assets, Policy [Policy Text Block] Intangible Assets, Finite-Lived, Policy [Policy Text Block] Goodwill, Policy [Policy Text Block] Goodwill and Intangible Assets, Goodwill, Policy [Policy Text Block] Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block] Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block] Treasury Stock [Text Block] Treasury Stock [Text Block] Share-based Compensation, Option and Incentive Plans Policy [Policy Text Block] Share-based Compensation, Option and Incentive Plans Policy [Policy Text Block] Income Tax, Policy [Policy Text Block] Income Tax, Policy [Policy Text Block] New Accounting Pronouncements, Policy [Policy Text Block] New Accounting Pronouncements, Policy [Policy Text Block] Organization and Summary of Significant Accounting Policies Organization, Consolidation, Basis of Presentation, Business Description and Accounting Policies [Text Block] Accounting Policies [Table] Accounting Policies [Table] Accounting Policies [Table] Accounting Policies [Line Items] Accounting Policies [Line Items] [Line Items] for Accounting Policies [Table] Income Statement [Abstract] Revenues: Revenues [Abstract] Drilling Services Revenue Oil And Gas Drilling Services Revenue Revenue from oil and gas drilling services during the period. Production Services Revenue Production Services Revenue Revenue from oil and gas-related production services, including well services, wireline services, and fishing and rental services during the period. Revenues Costs and expenses: Costs and Expenses [Abstract] Drilling Services Costs and Expenses Drilling Services Costs and Expenses Costs related to drilling services rendered during the reporting period. Production Services Costs and Expenses Production Services Costs and Expenses Costs related to production services rendered during the reporting period. Depreciation and amortization Depreciation, Depletion and Amortization General and administrative General and Administrative Expense Bad debt expense Provision for bad debt net of recoveries Amount of the current period expense charged against operations, the offset which is generally to the allowance for doubtful accounts for the purpose of reducing receivables, to an amount that approximates their net realizable value (the amount expected to be collected), net of recoveries of amounts previously charged to earnings as uncollectible. Impairment charges Asset Impairment Charges Total costs and expenses Costs and Expenses Income (loss) from operations Operating Income (Loss) Other (expense) income: Nonoperating Income (Expense) [Abstract] Interest expense Interest Expense Loss on extinguishment of debt Gains (Losses) on Extinguishment of Debt Other Other Nonoperating Income (Expense) Total other expense Nonoperating Income (Expense) Loss before income taxes Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest Income tax benefit Income Tax Expense (Benefit) Net loss Net Income (Loss) Attributable to Parent Income (Loss) from Continuing Operations, Per Basic Share Income (Loss) from Continuing Operations, Per Basic Share Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Basic Share Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Basic Share Discontinued Operation, Income (Loss) from Discontinued Operation, before Income Tax Discontinued Operation, Income (Loss) from Discontinued Operation, before Income Tax Discontinued Operation, Tax Effect of Discontinued Operation Discontinued Operation, Tax Effect of Discontinued Operation Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent Loss per common share - Basic (USD per share) Earnings Per Share, Basic Income (Loss) from Continuing Operations, Per Diluted Share Income (Loss) from Continuing Operations, Per Diluted Share Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Diluted Share Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Diluted Share Loss per common share - Diluted (USD per share) Earnings Per Share, Diluted Weighted average number of shares outstanding - Basic Weighted Average Number of Shares Outstanding, Basic Weighted-average number of shares outstanding - Diluted Weighted Average Number of Shares Outstanding, Diluted Schedule of Revenues from External Customers and Long-Lived Assets [Table] Schedule of Revenues from External Customers and Long-Lived Assets [Table] Consolidation Items [Axis] Consolidation Items [Axis] Consolidation Items [Domain] Consolidation Items [Domain] Geographical [Axis] Geographical [Axis] Geographical [Domain] Geographical [Domain] Revenues from External Customers and Long-Lived Assets [Line Items] Revenues from External Customers and Long-Lived Assets [Line Items] Schedule of Long-Lived Assets, by Reporting Segment Schedule of Long-Lived Assets, by Reporting Segment [Table Text Block] Schedule of Long-Lived Assets, by Reporting Segment [Table Text Block] Schedule of Segment Reporting Information, by Segment Schedule of Segment Reporting Information, by Segment [Table Text Block] Reconciliation of Operating Profit (Loss) from Segments to Consolidated Reconciliation of Operating Profit (Loss) from Segments to Consolidated [Table Text Block] Schedule of Revenue 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] Range [Axis] Range [Axis] Range [Domain] Range [Domain] Maximum [Member] Maximum [Member] Equity Components [Axis] Equity Components [Axis] Equity Component [Domain] Equity Component [Domain] Common Stock [Member] Common Stock [Member] Subsequent Event Type [Axis] Subsequent Event Type [Axis] Subsequent Event Type [Domain] Subsequent Event Type [Domain] Approved Grant of Stock-based Compensation [Member] Approved Grant of Stock-based Compensation [Member] Approved Grant of Stock Options [Member] Plan Name [Axis] Plan Name [Axis] Plan Name [Domain] Plan Name [Domain] Time-Based RSUs [Member] Time-Based RSUs [Member] Time-Based RSUs [Member] Performance-Based RSUs [Member] Performance-Based RSUs [Member] Performance-Based RSUs [Member] Performance-Based RSUs, 2011 [Member] Performance-Based RSUs, 2011 [Member] Performance-Based RSUs, 2011 [Member] Performance-Based RSUs, 2012 [Member] Performance-Based RSUs, 2012 [Member] Performance-Based RSUs, 2012 [Member] Performance-Based RSUs, 2013 [Member] Performance-Based RSUs, 2013 [Member] Performance-Based RSUs, 2013 [Member] Performance-Based RSUs, 2014 [Member] Performance-Based RSUs, 2014 [Member] Performance-Based RSUs, 2014 Class of Stock [Line Items] Class of Stock [Line Items] Registration Statement, Stated Maximum Amount Available for Equity or Debt Offerings Registration Statement, Stated Maximum Amount Available for Equity or Debt Offerings Registration Statement, Stated Maximum Amount Available for Equity or Debt Offerings Proceeds from Issuance or Sale of Equity [Abstract] Proceeds from Issuance or Sale of Equity [Abstract] Stock Issued During Period, Shares, New Issues Stock Issued During Period, Shares, New Issues Sale of Stock, Price Per Share Sale of Stock, Price Per Share Common Stock, Issuance Value Per Share Share Price Proceeds from common stock, net of offering costs Proceeds from Issuance of Common Stock Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value Share-based Compensation Arrangement by Share-based Payment Award, Additional Number of Shares Granted Share-based Compensation Arrangement by Share-based Payment Award, Additional Number of Shares Granted Share-based Compensation Arrangement by Share-based Payment Award, Additional Number of Shares Granted Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Outstanding, Number Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Number of Shares Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value Performance-based RSU performance period Performance-based RSU performance period Performance-based RSU performance period in years over which the vesting conditions are measured Share-based Compensation Arrangement by Share-based Payment Award, Estimated Achievement Level, Percentage Share-based Compensation Arrangement by Share-based Payment Award, Estimated Achievement Level, Percentage Share-based Compensation Arrangement by Share-based Payment Award, Estimated Achievement Level, Percentage Share-based Compensation Arrangement by Share-based Payment Award, Basis for Determining Award on Market Factors, Percentage Share-based Compensation Arrangement by Share-based Payment Award, Basis for Determining Award on Market Factors, Percentage Share-based Compensation Arrangement by Share-based Payment Award, Basis for Determining Award on Market Factors, Percentage Share-based Compensation Arrangement by Share-based Payment Award Basis for Determining Award on Individual Performance Factors Percentage Share-based Compensation Arrangement by Share-based Payment Award Basis for Determining Award on Individual Performance Factors Percentage Share-based Compensation Arrangement by Share-based Payment Award, Basis for Determining Award on Individual Performance Factors, Percentage Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures and Expirations in Period Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures and Expirations in Period Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures and Expirations in Period, Weighted Average Exercise Price Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures and Expirations in Period, Weighted Average Exercise Price Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Outstanding, Weighted Average Grant Date Price Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Weighted Average Grant Date Fair Value Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Grants in Period, Weighted Average Grant Date Price Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Vested in Period, Number Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested, Number of Shares Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Vested in Period, Weighted Average Grant Date Price Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested, Weighted Average Grant Date Fair Value Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Forfeitures in Period Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested Options Forfeited, Number of Shares Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Forfeitures in Preiod, Weighted Average Grant Date Price Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested Options Forfeited, Weighted Average Grant Date Fair Value Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Adjusted to Performance Condition Evaluation Number Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Adjusted to Performance Condition Evaluation Number Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Adjusted to Performance Condition Evaluation Number Schedule of Nonvested Share Activity [Table Text Block] Percent of 2011, 2012 & 2013 RSU's subject to market condition based on total shareholder return Percent of 2011, 2012 & 2013 RSU's subject to market condition based on total shareholder return Percent of 2011, 2012 & 2013 RSU's subject to market condition based on total shareholder return Statement of Cash Flows [Abstract] Net Cash Provided by (Used in) Financing Activities, Continuing Operations Net Cash Provided by (Used in) Financing Activities, Continuing Operations Cash Provided by (Used in) Financing Activities, Discontinued Operations Cash Provided by (Used in) Financing Activities, Discontinued Operations Cash flows from operating activities: Net Cash Provided by (Used in) Operating Activities [Abstract] Net loss Adjustments to reconcile net loss to cash provided by operating activities: Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Allowance for doubtful accounts Provision for Doubtful Accounts Gain on dispositions of property and equipment Gain (Loss) on Disposition of Property Plant Equipment, Excluding Oil and Gas Property and Timber Property Stock-based compensation expense Share-based Compensation Amortization of debt issuance costs, discount and premium Amortization of Financing Costs and Discounts Loss on extinguishment of debt Deferred income taxes Increase (Decrease) in Deferred Income Taxes Change in other long-term assets Increase (Decrease) in Other Noncurrent Assets Change in other long-term liabilities Increase (Decrease) in Other Noncurrent Liabilities Changes in current assets and liabilities: Increase (Decrease) in Operating Capital [Abstract] Receivables Increase (Decrease) in Accounts Receivable Inventory Increase (Decrease) in Inventories Prepaid expenses and other current assets Increase (Decrease) in Prepaid Expense and Other Assets Accounts payable Increase (Decrease) in Accounts Payable Deferred revenues Increase (Decrease) in Deferred Revenue Accrued expenses Increase (Decrease) in Accrued Liabilities Net cash provided by operating activities Net Cash Provided by (Used in) Operating Activities Net Cash Provided by (Used in) Operating Activities, Continuing Operations Net Cash Provided by (Used in) Operating Activities, Continuing Operations Cash Provided by (Used in) Operating Activities, Discontinued Operations Cash Provided by (Used in) Operating Activities, Discontinued Operations Cash flows from investing activities: Net Cash Provided by (Used in) Investing Activities [Abstract] Purchases of property and equipment Payments to Acquire Property, Plant, and Equipment Proceeds from sale of property and equipment Proceeds from Sale of Property, Plant, and Equipment Proceeds from sale of auction rate securities Payments for (Proceeds from) Investments Proceeds from insurance recoveries Proceeds from Insurance Settlement, Investing Activities Net Cash Provided by (Used in) Investing Activities, Continuing Operations Net Cash Provided by (Used in) Investing Activities, Continuing Operations Cash Provided by (Used in) Investing Activities, Discontinued Operations Cash Provided by (Used in) Investing Activities, Discontinued Operations Net cash used in investing activities Net Cash Provided by (Used in) Investing Activities Cash flows from financing activities: Net Cash Provided by (Used in) Financing Activities [Abstract] Debt repayments Repayments of Long-term Debt Proceeds from issuance of debt Proceeds from Issuance of Long-term Debt Debt issuance costs Payments of Debt Issuance Costs Change in restricted cash Increase (Decrease) in Restricted Cash Tender premium costs Payments of Debt Extinguishment Costs Proceeds from exercise of options Proceeds from Stock Options Exercised Purchase of treasury stock Payments for Repurchase of Common Stock Net cash provided by (used in) financing activities Net Cash Provided by (Used in) Financing Activities Net decrease in cash and cash equivalents Cash and Cash Equivalents, Period Increase (Decrease) Beginning cash and cash equivalents Cash and Cash Equivalents, at Carrying Value Ending cash and cash equivalents Supplementary disclosure: Supplemental Cash Flow Information [Abstract] Interest paid Interest Paid Income tax paid Income Taxes Paid, Net Schedule of Long-term Debt Instruments Schedule of Long-term Debt Instruments [Table Text Block] Equity Transactions And Stock Based Compensation Plans Equity Transactions And Stock Based Compensation Plans Equity Transactions And Stock-Based Compensation Plans Equity Transactions and Stock-based Compensation Plans [Text Block] Disclosure of certain equity transactions and compensation-related costs for share-based compensation which may include disclosure of policies, compensation plan details, allocation of stock compensation, incentive distributions, share-based arrangements to obtain goods and services, deferred compensation arrangements, employee stock ownership plan details and employee stock purchase plan details. Business Acquisition [Axis] Business Acquisition [Axis] Business Acquisition, Acquiree [Domain] Business Acquisition, Acquiree [Domain] Go-Coil [Member] Go-Coil [Member] Go-Coil [Member] Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets, Major Class Name [Domain] Finite-Lived Intangible Assets, Major Class Name [Domain] Client Relationships [Member] Customer Relationships [Member] Noncompete Agreements [Member] Noncompete Agreements [Member] Trademarks and Trade Names [Member] Trademarks and Trade Names [Member] Finite-Lived Intangible Assets, Gross Finite-Lived Intangible Assets, Gross Finite-Lived Intangible Assets, Net Finite-Lived Intangible Assets, Net Guarantor Non Guarantor Condensed Consolidated Financial Statements [Abstract] Guarantor Non Guarantor Condensed Consolidated Financial Statements [Abstract] Guarantor Non Guarantor Statement [Table] Guarantor Non Guarantor Statement [Table] Guarantor Non Guarantor Statement [Table] Legal Entity [Axis] Entity [Domain] Parent [Member] Guarantor Subsidiaries [Member] Guarantor Subsidiaries [Member] Non-Guarantor Subsidiaries [Member] Non-Guarantor Subsidiaries [Member] Eliminations [Member] Consolidation, Eliminations [Member] Guarantor Non Guarantor Statement [Line Items] Guarantor Non Guarantor Statement [Line Items] Operating Costs Cost of Revenue Intercompany leasing Intercompany Leasing Expense Intercompany Leasing Expense Bad debt expense Income (loss) from operations Equity in earnings of subsidiaries Income (Loss) from Equity Method Investments Interest expense Income (loss) before income taxes Income tax benefit Net income (loss) Minimum [Member] Minimum [Member] Drilling Rigs, by Status [Axis] Drilling Rigs, by Status [Axis] Drilling Rigs, by Status [Axis] Drilling Rigs Status [Domain] Drilling Rigs Status [Domain] Drilling Rigs Status [Domain] Active [Member] Active [Member] Active [Member] Contract Agreement, by Type [Axis] Contract Agreement, by Type [Axis] Contract Agreement, by Type [Axis] Conractual Agreement [Domain] Conractual Agreement [Domain] Conractual Agreement [Domain] Term Contract [Member] Term Contract [Member] Term Contract [Member] Drilling Rigs, by Contract Agreement [Axis] Drilling Rigs, by Contract Agreement [Axis] Drilling Rigs, by Contract Agreement [Axis] Drilling Rigs Contractual Agreement [Domain] Drilling Rigs Contractual Agreement [Domain] Drilling Rigs Contractual Agreement [Domain] Currently Under Drilling Contract [Member] Currently Under Drilling Contract [Member] Currently Under Drilling Contract [Member] United States [Member] UNITED STATES Drilling Rigs, Contractual Terms Drilling Rigs, Contractual Terms Drilling Rigs, Contractual Terms Drilling Rigs Assigned Drilling Rigs, Number of Contracts Expiring in Six Months Assigned Drilling Rigs, Number of Contracts Expiring in Six Months Assigned Drilling Rigs, Number of Contracts Expiring in Six Months Assigned Drilling Rigs, Number of Contracts Expiring in One Year Assigned Drilling Rigs, Number of Contracts Expiring Six Months to Twelve Months Assigned Drilling Rigs, Number of Contracts Expiring Six Months to Twelve Months Assigned Drilling Rigs, Number of Contracts Expiring in Eighteen Months Assigned Drilling Rigs, Number of Contracts Expiring in Twelve Months to Eighteen Months Assigned Drilling Rigs, Number of Contracts Expiring in Twelve Months to Eighteen Months Assigned Drilling Rigs, Number of Contracts Expiring in Two Years Assigned Drilling Rigs, Number of Contracts Expiring in Eighteen Months to Twenty Four Months Assigned Drilling Rigs, Number of Contracts Expiring in Eighteen Months to Twenty Four Months Assigned Drilling Rigs, Number of Contracts Expiring in Four Years Assigned Drilling Rigs, Number of Contracts Expiring in Twenty Four Months to Fourty Eight Months Assigned Drilling Rigs, Number of Contracts Expiring in Twenty Four Months to Fourty Eight Months Commitments and Contingencies Disclosure [Abstract] Commitments And Contingencies Commitments and Contingencies Disclosure [Text Block] Expected volatility Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate Risk-free interest rates Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate Expected life in years Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term Options granted Grant-date fair value ASSETS Assets [Abstract] Current assets: Assets, Current [Abstract] Cash and cash equivalents Receivables: Receivables, Net, Current [Abstract] Trade, net of allowance for doubtful accounts Accounts Receivable, Net, Current Unbilled receivables Unbilled Contracts Receivable Insurance recoveries Estimated Insurance Recoveries Income taxes and other Income Taxes Receivable and Other, Current Income Taxes Receivable and Other, Current Deferred income taxes Deferred Tax Assets, Net of Valuation Allowance, Current Inventory Inventory, Net Prepaid expenses and other current assets Prepaid Expense and Other Assets, Current Total current assets Assets, Current Property and equipment, at cost Less accumulated depreciation Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Net property and equipment Property, Plant and Equipment, Net Intangible assets, net of accumulated amortization of $36.3 million and $32.8 million at June 30, 2014 and December 31, 2013, respectively Intangible Assets, Net (Excluding Goodwill) Goodwill Goodwill Noncurrent deferred income taxes Deferred Tax Assets, Net of Valuation Allowance, Noncurrent Other long-term assets Other Assets, Noncurrent Assets of Disposal Group, Including Discontinued Operation, Noncurrent Assets of Disposal Group, Including Discontinued Operation, Noncurrent Assets of Disposal Group, Including Discontinued Operation, Current Assets of Disposal Group, Including Discontinued Operation, Current Total assets LIABILITIES AND SHAREHOLDERS' EQUITY Liabilities and Equity [Abstract] Current liabilities: Liabilities, Current [Abstract] Accounts payable Accounts Payable, Current Current portion of long-term debt Deferred revenues Deferred Revenue, Current Accrued expenses: Accrued Liabilities, Current [Abstract] Payroll and related employee costs Employee-related Liabilities, Current Insurance premiums and deductibles Accrued Insurance Premiums And Deductibles Accrued Insurance premiums and deductibles Insurance claims and settlements Accrued Insurance Claims And Settlements Accrued Insurance claims and settlements Interest Interest Payable, Current Other Other Accrued Liabilities, Current Liabilities of Disposal Group, Including Discontinued Operation, Current Liabilities of Disposal Group, Including Discontinued Operation, Current Total current liabilities Liabilities, Current Long-term debt, less current portion Noncurrent deferred income taxes Deferred Tax Liabilities, Net, Noncurrent Other long-term liabilities Other Liabilities, Noncurrent Liabilities of Disposal Group, Including Discontinued Operation, Noncurrent Liabilities of Disposal Group, Including Discontinued Operation, Noncurrent Total liabilities Liabilities Commitments and contingencies (Note 7) Commitments and Contingencies Shareholders' equity: Stockholders' Equity Attributable to Parent [Abstract] Preferred stock, 10,000,000 shares authorized; none issued and outstanding Preferred Stock, Value, Issued Common stock $.10 par value; 100,000,000 shares authorized; 63,101,570 and 62,534,636 shares outstanding at June 30, 2014 and December 31, 2013, respectively Common Stock, Value, Issued Additional paid-in capital Additional Paid in Capital, Common Stock Treasury stock, at cost; 316,682 and 219,304 shares at June 30, 2014 and December 31, 2013, respectively Treasury Stock, Value Accumulated earnings Retained Earnings (Accumulated Deficit) Total shareholders' equity Stockholders' Equity Attributable to Parent Total liabilities and shareholders' equity Liabilities and Equity Document and Entity Information Document and Entity Information Entity Current Reporting Status Entity Current Reporting Status Entity Public Float Entity Public Float 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 Entity Well-known Seasoned Issuer Entity Well-known Seasoned Issuer Entity Voluntary Filers Entity Voluntary Filers Corporate, Non-Segment [Member] Corporate, Non-Segment [Member] Segment Margin Gross Profit Capital Expenditures Property, Plant and Equipment, Additions Valuation Allowances and Reserves Type [Axis] Valuation Allowances and Reserves Type [Axis] Valuation Allowances and Reserves [Domain] Valuation Allowances and Reserves [Domain] Allowance for Doubtful Accounts [Member] Allowance for Doubtful Accounts [Member] Valuation Allowances and Reserves, Balance Valuation Allowances and Reserves, Balance Valuation Allowances and Reserves, Increase (Decrease) Charged to Cost and Expense Valuation Allowances and Reserves, Increase (Decrease) Charged to Cost and Expense Valuation Allowances and Reserves, Increase (Decrease) Charged to Cost and Expense Valuation Allowances and Reserves, Deductions Valuation Allowances and Reserves, Deductions Payment Term in Days for services invoiced, Average Payment Term in Days for services invoiced, Average Invoicing terms - average payment term in days, for services invoiced Payment Term in Days for services invoiced, Maximum Payment Term in Days for services invoiced, Maximum Invoicing terms - payment term (in days) for services invoiced, Maximum Accounts receivable age, individually reviewed for collectibility Accounts receivable age, individually reviewed for collectibility Accounts receivable age, individually reviewed for collectibility - number of days past due at which time the accounts are reviewed individually for collectibility. Schedule of Earnings Per Share, Basic and Diluted Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Fair Value, Inputs, Level 3 [Member] Fair Value, Inputs, Level 3 [Member] Turnkey Drilling Contract [Member] Turnkey Drilling Contract [Member] Turnkey Drilling Contract [Member] Daywork Drilling Contract [Member] Daywork Drilling Contract [Member] Daywork Drilling Contract [Member] Estimated to Become Active in 6 Months [Member] Estimated to Become Active Between 9 and 12 Months [Member] Estimated to Become Active Between 9 and 12 Months [Member] Expected to become active within one month [Member] Expected to become active within approximately one month [Member] Expected to become active within one month [Member] Long Lived Assets Held-for-sale by Asset Type [Axis] Long Lived Assets Held-for-sale by Asset Type [Axis] Long Lived Assets Held-for-sale, Name [Domain] Long Lived Assets Held-for-sale, Name [Domain] Trucks [Member] Trucks [Member] Derivative, by Nature [Axis] Derivative, by Nature [Axis] Derivative, Name [Domain] Derivative, Name [Domain] Options Held [Member] Options Held [Member] Valuation Technique [Axis] Valuation Technique [Axis] Valuation Technique [Domain] Valuation Technique [Domain] Income Approach Valuation Technique [Member] Income Approach Valuation Technique [Member] Asset Class [Axis] Asset Class [Axis] Asset Class [Domain] Asset Class [Domain] Finite-Lived Intangible Assets [Member] Finite-Lived Intangible Assets [Member] Goodwill [Member] Goodwill [Member] Payments to Acquire Property, Plant, and Equipment Business Business [Abstract] Business [Abstract] for Organization and Summary of Significant Accounting Policies Drilling Rigs Under Term Contract To Be Built Drilling Rigs Under Term Contract To Be Built Drilling Rigs Under Term Contract To Be Built Segment Reporting Information, Disposed Drililng Rigs Segment Reporting Information, Disposed Drililng Rigs Segment Reporting Information, Disposed Drililng Rigs Significant Acquisitions and Disposals, Gain (Loss) on Sale or Disposal, Pretax Significant Acquisitions and Disposals, Gain (Loss) on Sale or Disposal, Pretax Segment Reporting Information, Drilling Rigs Held for Sale Segment Reporting Information, Drilling Rigs Held for Sale Segment Reporting Information, Drilling Rigs Held for Sale Revenue Recognition Revenue Recognition [Abstract] Costs in Excess of Billings, Current Costs in Excess of Billings, Current Deferred Revenue, Noncurrent Deferred Revenue, Noncurrent Costs in Excess of Billings, Noncurrent Costs in Excess of Billings, Noncurrent Recognition of Deferred Revenue Recognition of Deferred Revenue Average Term to Drill Individual Well, Maximum Average Term to Drill Individual Well, Maximum Average Term to Drill Individual Well, Maximum Cash and Cash Equivalents Cash and Cash Equivalents [Abstract] Cash Equivalents, at Carrying Value Cash Equivalents, at Carrying Value Unbilled Accounts Receivable Unbilled Accounts Receivable [Abstract] Unbilled Accounts Receivable [Abstract] Billing Invoice Interval, Period Billing Invoice Interval, Period Billing Invoice Interval, Period Investments Investments [Abstract] Auction Market Preferred Securities, Stock Series, Value Auction Market Preferred Securities, Stock Series, Value Payments for (Proceeds from) Other Investing Activities Payments for (Proceeds from) Other Investing Activities Derivative Asset, Current Derivative Asset, Current Property and Equipment [Abstract] Property and Equipment [Abstract] Property and Equipment [Abstract] Interest Costs Capitalized Interest Costs Capitalized Gain (Loss) on Disposition of Property Plant Equipment Gain (Loss) on Disposition of Property Plant Equipment Trucks, number in fleet Property, Plant, and Equipment, Fleet Sold, Number Property, Plant, and Equipment, Fleet Sold, Number Net property and equipment Construction in Progress, Gross Construction in Progress, Gross Assets Held-for-sale, Long Lived Assets Held-for-sale, Long Lived Segment Reporting Information, Drilling Rigs Held-for-use Segment Reporting Information, Drilling Rigs Held-for-use Segment Reporting Information, Drilling Rigs Held-for-use Segment Reporting Information, Disposed Wireline Units Segment Reporting Information, Disposed Wireline Units Segment Reporting Information, Disposed Wireline Units Intangible Assets Goodwill and Intangible Assets Disclosure [Abstract] Sensitivity Analysis of Fair Value, Change in Impairment Due to Change in Assumption, Impact of One Percent Increase of Pricing Assumption Sensitivity Analysis of Fair Value, Change in Impairment Due to Change in Assumption, Impact of One Percent Increase of Pricing Assumption Sensitivity Analysis of Fair Value, Change in Impairment Due to Change in Assumption, Impact of One Percent Increase of Pricing Assumption Finite-Lived Intangible Asset, Useful Life Finite-Lived Intangible Asset, Useful Life Amortization of Intangible Assets Amortization of Intangible Assets Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months Finite-Lived Intangible Assets, Amortization Expense, Year Two Finite-Lived Intangible Assets, Amortization Expense, Year Two Finite-Lived Intangible Assets, Amortization Expense, Year Three Finite-Lived Intangible Assets, Amortization Expense, Year Three Finite-Lived Intangible Assets, Amortization Expense, Year Four Finite-Lived Intangible Assets, Amortization Expense, Year Four Finite-Lived Intangible Assets, Amortization Expense, Year Five Finite-Lived Intangible Assets, Amortization Expense, Year Five Impairment of Intangible Assets, Finite-lived Impairment of Intangible Assets, Finite-lived Goodwill, Impairment Loss Goodwill, Impairment Loss Sensitivity Analysis of Fair Value, Change in Impairment Due to Change in Assumption, Impact of One Percent Decrease of Pricing Assumption Sensitivity Analysis of Fair Value, Change in Impairment Due to Change in Assumption, Impact of One Percent Decrease of Pricing Assumption Sensitivity Analysis of Fair Value, Change in Impairment Due to Change in Assumption, Impact of One Percent Decrease of Pricing Assumption Sensitivity Analysis of Fair Value, Change in Impairment De to Change in Assumption, Impact of One Percent Increase of Utilization Assumption Sensitivity Analysis of Fair Value, Change in Impairment De to Change in Assumption, Impact of One Percent Increase of Utilization Assumption Sensitivity Analysis of Fair Value, Change in Impairment Due to Change in Assumption, Impact of One Percent Increase of Utilization Assumption Sensitivity Analysis of Fair Value, Change in Impairment Due to Change in Assumption Impact of One Percent Decrease of Utilization Assumption Sensitivity Analysis of Fair Value, Change in Impairment Due to Change in Assumption Impact of One Percent Decrease of Utilization Assumption Sensitivity Analysis of Fair Value, Change in Impairment Due to Change in Assumption Impact of One Percent Decrease of Utilization Assumption Sensitivity Analysis of Fair Value, Change in Impairment Due to Change in Assumption, Impact of Five Percent Decrease of Discount Rate Assumption Sensitivity Analysis of Fair Value, Change in Impairment Due to Change in Assumption, Impact of Five Percent Decrease of Discount Rate Assumption Sensitivity Analysis of Fair Value, Change in Impairment Due to Change in Assumption, Impact of Five Percent Decrease of Discount Rate Assumption Fair Value Inputs, Discount Rate Fair Value Inputs, Discount Rate Trade Receivables [Abstract] Receivables [Abstract] Schedule of Allowance for Doubtful Accounts [Table Text Block] Schedule of Allowance for Doubtful Accounts [Table Text Block] Schedule of Allowance for Doubtful Accounts [Table Text Block] Gain (Loss) on Disposition of Property Plant Equipment, Excluding Oil and Gas Property and Timber Property Schedule of Finite-Lived Intangible Assets [Table Text Block] Schedule of Finite-Lived Intangible Assets [Table Text Block] Basic Earnings Per Share, Basic [Abstract] Weighted-average shares, outstanding Loss per share Diluted Earnings Per Share, Diluted [Abstract] Weighted average shares: Incremental Weighted Average Shares Attributable to Dilutive Effect [Abstract] Diluted effect of stock options, restricted stock, and restricted stock unit awards Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements Weighted-average shares, Diluted Loss per share Earnings (loss) Per Common Share Earnings Per Share [Text Block] Share-based Compensation Arrangement by Share-based Payment Award, Actual Achievement Level, Percentage Share-based Compensation Arrangement by Share-based Payment Award, Actual Achievement Level, Percentage Share-based Compensation Arrangement by Share-based Payment Award, Actual Achievement Level, Percentage Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Adjusted to Performance Condition Evaluation Number Granted, Number of Award Units Granted, Weighted-Average Grant-Date Fair Value per Unit Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table] Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table] Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] Share-based Compensation Statement [Table] Statement [Table] Scenario [Axis] Scenario [Axis] Scenario, Unspecified [Domain] Scenario, Unspecified [Domain] Statement [Line Items] Statement [Line Items] Underwriters' commissions and offering costs, due to issuance of common stock Payments of Stock Issuance Costs Supplemental Guarantor Condensed Consolidated Balance Sheets Supplemental Guarantor Condensed Consolidated Balance Sheets [Table Text Block] Supplemental Guarantor Condensed Consolidated Balance Sheets [Table Text Block] Supplemental Guarantor Condensed Consolidated Statements of Operations Supplemental Guarantor Condensed Consolidated Statements of Operations [Table Text Block] Supplemental Guarantor Condensed Consolidated Statements of Operations [Table Text Block] Supplemental Guarantor Condensed Consolidated Statements of Cash Flows Supplemental Guarantor Condensed Consolidated Statements of Cash Flows [Table Text Block] Supplemental Guarantor Condensed Consolidated Statements of Cash Flows [Table Text Block] Segment Margin Depreciation and amortization General and administrative Bad debt expense Impairment charges Debt Instrument, Redemption, Period [Axis] Debt Instrument, Redemption, Period [Axis] Debt Instrument, Redemption, Period [Domain] Debt Instrument, Redemption, Period [Domain] Debt Instrument, Redemption, Period One [Member] Debt Instrument, Redemption, Period One [Member] Balance Sheet Location [Axis] Balance Sheet Location [Axis] Balance Sheet Location [Domain] Balance Sheet Location [Domain] Restricted Cash [Member] Restricted Cash [Member] Restricted Cash [Member] Debt Instruments Redemption [Axis] Debt Instruments Redemption [Axis] Debt Instruments Redemption [Axis] Debt Instruments Redemption [Domain] Debt Instruments Redemption [Domain] Debt Instruments Redemption [Domain] Redemption Prior to March 15, 2017 [Member] Redemption Prior to March 15, 2017 [Member] Redemption Prior to March 15, 2017 [Member] Subsequent Event [Member] Subsequent Event [Member] Variable Rate [Axis] Variable Rate [Axis] Variable Rate [Domain] Variable Rate [Domain] London Interbank Offered Rate (LIBOR) [Member] London Interbank Offered Rate (LIBOR) [Member] Prime Rate [Member] Prime Rate [Member] Senior Notes, 2010 [Member] Senior Notes, 2010 [Member] Senior Notes, 2010 [Member] Senior Notes, 2014 [Member] Senior Notes, 2014 [Member] Senior Notes, 2014 [Member] Senior Notes, 2011 [Member] Senior Notes, 2011 [Member] Senior Notes, 2011 [Member] Senior Notes, 2010 and 2011 [Member] Senior Notes, 2010 and 2011 [Member] Senior Notes, 2010 and 2011 [Member] Alternative [Axis] Alternative [Axis] Alternative [Axis] Alternative [Domain] Alternative [Domain] Alternative [Domain] Alternative Testing for Covenant [Member] Alternative Testing for Compliance [Member] Alternative Testing for Compliance [Member] Long-term Debt, by Current and Noncurrent [Abstract] Long-term Debt, by Current and Noncurrent [Abstract] Long-term Debt Long-term Debt, Gross Long-term Debt, Gross Line of Credit Facility [Abstract] Line of Credit Facility [Abstract] Line of Credit Facility, Maximum Borrowing Capacity Line of Credit Facility, Maximum Borrowing Capacity Debt Instrument, Basis Spread on Variable Rate Debt Instrument, Basis Spread on Variable Rate Debt Instrument Stated Percentage of Outstanding Equity Interests of First Tier Foreign Subsidiaries That Secure Debt Obligations Debt Instrument Stated Percentage of Outstanding Equity Interests of First Tier Foreign Subsidiaries That Secure Debt Obligations Debt Instrument, Stated Percentage of Outstanding Equity Interests of First Tier Foreign Subsidiaries That Secure Debt Obligations Line of Credit Facility, Amount Outstanding Line of Credit Facility, Amount Outstanding Letters of Credit Outstanding, Amount Letters of Credit Outstanding, Amount Line of Credit Facility, Remaining Borrowing Capacity Line of Credit Facility, Remaining Borrowing Capacity Ratio of Indebtedness to Net Capital Ratio of Indebtedness to Net Capital Ratio of Indebtedness to Net Capital, Senior Debt Instrument, Ratio of Indebtedness to Net Capital, Senior Debt Instrument, Ratio of Indebtedness to Net Capital, Senior Ratio of Interest Coverage Debt Instrument, Ratio of Interest Coverage Debt Instrument, Ratio of Interest Coverage Debt Instrument, Covenant Compliance, Ratio of Indebtedness to Net Capital Debt Instrument, Covenant Compliance, Ratio of Indebtedness to Net Capital Debt Instrument, Covenant Compliance, Ratio of Indebtedness to Net Capital Debt Instrument, Covenant Compliance, Ratio of Indebtedness to Net Capital, Senior Debt Instrument, Covenant Compliance, Ratio of Indebtedness to Net Capital, Senior Debt Instrument, Covenant Compliance, Ratio of Indebtedness to Net Capital, Senior Debt Instrument, Covenant Compliance, Ratio of Interest Coverage Debt Instrument, Covenant Compliance, Ratio of Interest Coverage Debt Instrument, Covenant Compliance, Ratio of Interest Coverage Debt Instrument, Covenant Compliance, Ratio of Asset Coverage Debt Instrument, Covenant Compliance, Ratio of Asset Coverage Debt Instrument, Covenant Compliance, Ratio of Asset Coverage Debt Instrument, Covenant Compliance, Line of Credit Facility, Remaining Borrowing Capacity After Capital Expenditures Adjustment To Avoid Future Capital Expenditures Restrictions Debt Instrument, Covenant Compliance Line of Credit Facility Remaining Borrowing Capacity After Capital Expenditures Adjustment To Avoid Future Capital Expenditures Restrictions Debt Instrument, Covenant Compliance Line of Credit Facility Remaining Borrowing Capacity After Capital Expenditures Adjustment To Avoid Future Capital Expenditures Restrictions Debt Instrument, Covenant Compliance, Capital Expenditure Limitation Threshold, Ratio of Indebtedness to Net Capital, Senior Debt Instrument, Covenant Compliance, Capital Expenditure Limitation Threshold, Ratio of Indebtedness to Net Capital, Senior Debt Instrument, Covenant Compliance, Capital Expenditure Limitation Threshold, Ratio of Indebtedness to Net Capital, Senior Capital Expenditure Limitation During Fiscal Year To Be Imposed If Covenant Noncompliance, Exceeding Stated Senior Consolidated Leverage Ratio Capital Expenditure Limitation During Fiscal Year To Be Imposed If Covenant Noncompliance, Exceeding Stated Senior Consolidated Leverage Ratio Capital Expenditure Limitation During Fiscal Year To Be Imposed If Covenant Noncompliance, Exceeding Stated Senior Consolidated Leverage Ratio Capital Expenditure Limitation Maximum Amount Unused From Prior Fiscal Year Available to Increase Current Year Capital Expenditure Threshold If Restrictions Imposed Due to Noncompliance Capital Expenditure Limitation Maximum Amount Unused From Prior Fiscal Year Available to Increase Current Year Capital Expenditure Threshold If Restrictions Imposed Due to Noncompliance Capital Expenditure Limitation Maximum Amount Unused From Prior Fiscal Year Available to Increase Current Year Capital Expenditure Threshold If Restrictions Imposed Due to Noncompliance Senior Notes [Abstract] Senior Notes [Abstract] Debt Instrument, Face Amount Debt Instrument, Face Amount Debt Instrument, Interest Rate, Stated Percentage Debt Instrument, Interest Rate, Stated Percentage Debt Instrument, Unamortized Discount Debt Instrument, Unamortized Discount Debt Instrument, Interest Rate, Effective Percentage Debt Instrument, Interest Rate, Effective Percentage Proceeds from Issuance of Debt Proceeds from Issuance of Debt Deferred Finance Costs, Gross Deferred Finance Costs, Gross Debt Instrument, Tender Offer, Principal Amount, Maximum Debt Instrument, Tender Offer, Principal Amount, Maximum The maximum principal amount of the outstanding debt instrument for which the entity commenced tender offers. Payments of Debt Extinguishment Costs Debt Instrument, Repurchased Face Amount Debt Instrument, Repurchased Face Amount Debt Instrument, Repurchase Price, per $1,000 principal amount Debt Instrument, Repurchase Price, per $1,000 principal amount Dollar amount repurchase price for each $1,000 in principal amount of Senior Notes repurchased Debt Instrument, Unamortized Discount on Notes Tendered Debt Instrument, Unamortized Discount on Notes Tendered Debt Instrument, Unamortized Discount on Notes Tendered Unamortized Deferred Finance Costs on Notes Tendered Unamortized Deferred Finance Costs on Notes Tendered Unamortized Deferred Finance Costs on Notes Tendered Debt Instrument, Actual Value to Face Value, Percentage Debt Instrument, Carrying Value to Face Value, Percentage Debt Instrument, Carrying Value to Face Value, Percentage Debt Instrument, Unamortized Premium Debt Instrument, Unamortized Premium Debt Instrument, Face Amount, Remaining Balance related to Tender Offer Debt Instrument, Face Amount, Remaining Balance related to Tender Offer Debt Instrument, Face Amount, Remaining Balance related to Tender Offer Debt Instrument Subject to Early Redemption, Percentage of Aggregate Principal Redeemable prior to March 15, 2017 Debt Instrument Subject to Early Redemption, Percentage of Aggregate Principal Redeemable prior to March 15, 2017 Debt Instrument Redeemable with Debt Proceeds, Maximum Principal Percentage Redeemable per Occasion Debt instrument, Redeemable with Debt Issuance Proceeds, Redemption Price, Percentage Debt instrument, Redeemable with Debt Issuance Proceeds, Redemption Price, Percentage Debt instrument, Redeemable with Debt Issuance Proceeds, Redemption Price, Percentage Debt Instrument, Redeemable with Debt Issuance Proceeds, Minimum Percentage Outstanding After Redemption Debt Instrument, Redeemable with Debt Issuance Proceeds, Minimum Percentage Outstanding After Redemption Debt Instrument, Redeemable with Debt Issuance Proceeds, Minimum Percentage Outstanding After Redemption Debt Instrument, Redemption Price, Percentage Debt Instrument, Redemption Price, Percentage Debt Instrument, Redemption, Value Debt Instrument, Redemption, Value Debt Instrument, Redemption, Value Debt Instrument Subject to Early Redemption, Percentage of Aggregate Principal Outstanding after Redemption on March 15, 2017 Debt Instrument Subject to Early Redemption, Percentage of Aggregate Principal Outstanding after Redemption on March 15, 2017 Debt Instrument Subject to Early Redemption, Percentage of Aggregate Principal Outstanding after Redemption on March 15, 2017 Restricted Cash Restricted Cash and Cash Equivalents, Current Debt Instrument, Redeemable with Equity Issuance Proceeds, Required Repurchase Due to Change in Control Redemption Price, Percentage Debt Instrument, Redeemable with Equity Issuance Proceeds, Required Repurchase Due to Change in Control Redemption Price, Percentage Debt Instrument, Redeemable with Equity Issuance Proceeds, Required Repurchase Due to Change in Control Redemption Price, Percentage Debt Instrument, Redeemable with Equity Issuance Proceeds, Required Repurchase Due to Asset Disposition, Redemption Price, Percentage Debt Instrument, Redeemable with Equity Issuance Proceeds, Required Repurchase Due to Asset Disposition, Redemption Price, Percentage Debt Instrument, Redeemable with Equity Issuance Proceeds, Required Repurchase Due to Asset Disposition, Redemption Price, Percentage Deferred Finance Costs [Abstract] Deferred Finance Costs [Abstract] Deferred Finance Costs, Net Deferred Finance Costs, Net Amortization of Financing Costs Amortization of Financing Costs Unamortized Deferred Finance Costs on Notes Tendered included in Debt Extinguishment Costs Unamortized Deferred Finance Costs on Notes Tendered included in Debt Extinguishment Costs Unamortized Deferred Finance Costs on Notes Tendered included in Debt Extinguishment Costs Cash flows from operating activities: Net cash used in investing activities Net cash provided by (used in) financing activities Net increase (decrease) in cash and cash equivalents Guarantor Obligations, Current Carrying Value Guarantor Obligations, Maximum Exposure, Undiscounted Fair Value Disclosures [Abstract] Fair Value Of Financial Instruments Fair Value Disclosures [Text Block] Schedule of Drilling Contracts [Table Text Block] Schedule of Drilling Contracts [Table Text Block] Schedule of Drilling Contracts [Table Text Block] Schedule of Allowance for Doubtful Accounts Schedule of Intangible Assets Receivables, net of allowance Receivables, Net, Current Intercompany receivable (payable) Related Party Transaction, Due from (to) Related Party, Current Investments in subsidiaries Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures Intangible assets, net of accumulated amortization Accrued expenses Accrued Liabilities, Current Total liabilities Total shareholders' equity Total liabilities and shareholders' equity