Document and Entity Information [Abstract] Document And Entity Information [Abstract] Document Type Document Type Document Quarterly Report Document Quarterly Report Document Period End Date Document Period End Date Document Transition Report Document Transition Report Securities Act File Number Entity File Number Entity Registrant Name Entity Registrant Name Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Entity Tax Identification Number Entity Tax Identification Number Entity Address, Address Line One Entity Address, Address Line One Entity Address, Address Line Two Entity Address, Address Line Two Entity Address, City or Town Entity Address, City or Town Entity Address, State or Province Entity Address, State or Province Entity Address, Postal Zip Code Entity Address, Postal Zip Code City Area Code City Area Code Local Phone Number Local Phone Number Title of 12(b) Security Title of 12(b) Security Trading Symbol Trading Symbol Security Exchange Name Security Exchange Name Entity Current Reporting Status Entity Current Reporting Status Entity Interactive Data Current Entity Interactive Data Current Entity Filer Category Entity Filer Category Entity Small Business Entity Small Business Entity Emerging Growth Company Entity Emerging Growth Company Entity Shell Company Entity Shell Company Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Entity Central Index Key Entity Central Index Key Current Fiscal Year End Date Current Fiscal Year End Date Document Fiscal Year Focus Document Fiscal Year Focus Document Fiscal Period Focus Document Fiscal Period Focus Amendment Flag Amendment Flag CONSOLIDATED BALANCE SHEETS Assets [Abstract] ASSETS Assets, Current [Abstract] Current assets: Cash and Cash Equivalents, at Carrying Value Cash and cash equivalents Accounts Receivable, after Allowance for Credit Loss, Current Accounts receivable, net of allowance for credit losses of $3,554 and $3,529, respectively Other Assets, Current Other current assets Total other current assets Assets, Current Total current assets Property, Plant and Equipment, Gross Property and equipment Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Less accumulated depreciation Property, Plant and Equipment, Net Property and equipment, net Operating Lease, Right-of-Use Asset Operating lease right-of-use assets Deferred certification and dry dock costs, Net Deferred certification and dry dock costs, net Other Assets, Noncurrent Other assets, net Total other assets, net Assets Total assets Liabilities and Equity [Abstract] LIABILITIES AND SHAREHOLDERS' EQUITY Liabilities, Current [Abstract] Current liabilities: Accounts Payable, Current Accounts payable Accrued Liabilities, Current Accrued liabilities Total accrued liabilities Long-Term Debt, Current Maturities Less: current maturities Current maturities of long-term debt Operating Lease, Liability, Current Current operating lease liabilities Liabilities, Current Total current liabilities Long-Term Debt, Excluding Current Maturities Long-term debt Operating Lease, Liability, Noncurrent Operating lease liabilities Non-current operating lease liabilities Deferred Income Tax Liabilities, Net Deferred tax liabilities Other Liabilities, Noncurrent Other non-current liabilities Total other non-current liabilities Liabilities Total liabilities Commitments and Contingencies Commitments and contingencies Equity, Attributable to Parent [Abstract] Shareholders' equity: Common Stock, Value, Issued Common stock, no par, 240,000 shares authorized, 147,296 and 147,186 shares issued, respectively Retained Earnings (Accumulated Deficit) Retained earnings Accumulated Other Comprehensive Income (Loss), Net of Tax Accumulated other comprehensive loss Equity, Attributable to Parent Balance, end of period Balance, beginning of period Total shareholders' equity Liabilities and Equity Total liabilities and shareholders' equity Accounts Receivable, Allowance for Credit Loss, Current Balance at end of period Balance at beginning of year Allowance for credit losses Common Stock, Par or Stated Value Per Share Common stock, par value (USD per share) Common Stock, Shares Authorized Common stock, shares authorized Common Stock, Shares, Issued Common stock, shares issued CONSOLIDATED STATEMENTS OF OPERATIONS Revenue from Contract with Customer, Excluding Assessed Tax Net revenues Total Revenue Cost of Revenue Direct cost of revenues Cost of sales Gross Profit Gross profit Selling, General and Administrative Expense Selling, general and administrative expenses Operating Income (Loss) Income (loss) from operations Income (loss) from operations Interest Income (Expense), Nonoperating Net interest expense Net interest expense Net interest expense Other Nonoperating Income (Expense) Other income (expense), net Amount of nonoperating income related to income from oil and gas royalty interest and other. Royalty Income And Other Royalty income and other Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Income (loss) before income taxes Income Tax Expense (Benefit) Income tax provision (benefit) Income tax provision (benefit) Net income (loss) Net income (loss) Earnings Per Share Earnings (loss) per share of common stock: Earnings Per Share, Basic Basic (in dollars per share) Earnings (loss) per share, basic (in dollars per share) Earnings Per Share, Diluted Diluted (in dollars per share) Earnings (loss) per share, diluted (in dollars per share) Weighted Average Number of Shares Outstanding, Diluted [Abstract] Weighted average common shares outstanding: Weighted Average Number of Shares Outstanding, Basic Basic (in shares) Weighted average number of shares outstanding, basic (in shares) Weighted Average Number of Shares Outstanding, Diluted Diluted (in shares) Weighted average number of shares outstanding, diluted (in shares) Diluted shares (as reported) CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax Other comprehensive income (loss) - foreign currency translation gain (loss), net of tax Foreign currency translation adjustments Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest Comprehensive income (loss) CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY Statement [Table] Statement [Table] Equity Components [Axis] Equity Component [Domain] Common Stock [Member] Common Stock Retained Earnings [Member] Retained Earnings AOCI Attributable to Parent [Member] Accumulated Other Comprehensive Loss Statement [Line Items] Statement [Line Items] Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Common Stock, Shares, Outstanding Balance, end of period (in shares) Balance, beginning of period (in shares) Equity impact of the value of stock due to activity in company stock plan ,net and others. Stock Repurchased During Period, Value , Change in Company Stock Plan, Net And Others Activity in company stock plans, net and other Equity impact of the number of stock due to activity in company stock plan ,net and others. Stock Repurchased During Period, Shares , Change in Company Stock Plan, Net And Others Activity in company stock plans, net and other (in shares) Shares Issued, Value, Share-Based Payment Arrangement, after Forfeiture Share-based compensation CONSOLIDATED STATEMENTS OF CASH FLOWS Net Cash Provided by (Used in) Operating Activities [Abstract] Cash flows from operating activities: Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Net income (loss) Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Adjustments to reconcile net income (loss) to net cash provided by operating activities: The aggregate expense recognized in the current period that allocates the cost of tangible assets, intangible assets, or depleting assets to periods that benefit from use of the assets, excluding amortization of deferred certification and dry dock costs. Depreciation and amortization, excluding amortization of deferred certification and dry dock costs The amount of expense recognized in the current period that reflects the allocation of capitalized costs associated with certification and dry dock costs. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method. Amortization of deferred certification and dry dock costs Payments for certification and dry dock costs to be deferred and amortized. Payments for Deferred Certification and Dry Dock Costs Deferred certification and dry dock costs Amortization of Debt Discount (Premium) Amortization of debt discount Amortization of Debt Issuance Costs Amortization of debt issuance costs Share-Based Payment Arrangement, Noncash Expense Share-based compensation Deferred Income Tax Expense (Benefit) Deferred income taxes Unrealized Gain (Loss), Foreign Currency Transaction, before Tax Unrealized foreign currency losses Increase (Decrease) in Operating Capital [Abstract] Changes in operating assets and liabilities: Increase (Decrease) in Accounts Receivable Accounts receivable, net Increase (Decrease) in Other Current Assets Other current assets Increase (Decrease) in Income Taxes Receivable Income tax receivable Increase (Decrease) in Accounts Payable and Accrued Liabilities Accounts payable and accrued liabilities Increase (Decrease) in Other Operating Assets and Liabilities, Net Other, net Net Cash Provided by (Used in) Operating Activities Net cash provided by operating activities Net Cash Provided by (Used in) Investing Activities [Abstract] Cash flows from investing activities: Payments to Acquire Productive Assets Capital expenditures Net Cash Provided by (Used in) Investing Activities Net cash used in investing activities Net Cash Provided by (Used in) Financing Activities [Abstract] Cash flows from financing activities: Repayments of Secured Debt Repayment of MARAD Debt Payment, Tax Withholding, Share-Based Payment Arrangement Payments related to tax withholding for share-based compensation Proceeds from Stock Plans Proceeds from issuance of ESPP shares Net Cash Provided by (Used in) Financing Activities Net cash used in financing activities Effect of Exchange Rate on Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Continuing Operations Effect of exchange rate changes on cash and cash equivalents Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect Net increase in cash and cash equivalents Cash and Cash Equivalents, at Carrying Value [Abstract] Cash and cash equivalents: Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation Balance, end of period Balance, beginning of year Organization Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] Basis of Presentation and New Accounting Standards Nature of Operations [Text Block] Organization n/a Details of Certain Accounts Supplemental Balance Sheet Disclosures [Text Block] Details of Certain Accounts Leases Lessee, Operating Leases [Text Block] Leases Long-Term Debt. Long-Term Debt [Text Block] Long-Term Debt Income Taxes Income Tax Disclosure [Text Block] Income Taxes Share Repurchase Programs Treasury Stock [Text Block] Share Repurchase Programs Revenue from Contracts with Customers Revenue from Contract with Customer [Text Block] Revenue from Contracts with Customers Earnings Per Share [Text Block] Earnings Per Share Employee Benefit Plans Compensation and Employee Benefit Plans [Text Block] Employee Benefit Plans Business Segment Information Segment Reporting Disclosure [Text Block] Business Segment Information Asset Retirement Obligations Asset Retirement Obligation Disclosure [Text Block] Asset Retirement Obligations Commitments and Contingencies and Other Matters Commitments and Contingencies Disclosure [Text Block] Commitments and Contingencies and Other Matters Statement of Cash Flow Information Cash Flow, Supplemental Disclosures [Text Block] Statement of Cash Flow Information Allowance Accounts Allowance for Credit Losses [Text Block] Allowance Accounts Fair Value Measurements Fair Value Disclosures [Text Block] Fair Value Measurements Subsequent Events [Abstract] Subsequent Events [Text Block] Subsequent Events Summary of Significant Accounting Policies Basis of Accounting, Policy [Policy Text Block] Basis of Presentation Reclassification, Comparability Adjustment [Policy Text Block] Reclassifications New Accounting Pronouncements, Policy [Policy Text Block] New Accounting Standards Schedule of Other Current Assets [Table Text Block] Schedule of other current assets Schedule of Other Assets, Noncurrent [Table Text Block] Schedule of other assets, net Schedule of Accrued Liabilities [Table Text Block] Schedule of accrued liabilities Other Noncurrent Liabilities [Table Text Block] Schedule of other non-current liabilities Lease, Cost [Table Text Block] Schedule of components of lease cost Lessee, Operating Lease, Liability, to be Paid, Maturity [Table Text Block] Schedule of maturities of operating lease liabilities Weighted Average Remaining Lease Term And Discount Rate [Table Text Block] Weighted Average Remaining Lease Term And Discount Rate [Table Text Block] Schedule of weighted average remaining lease term and discount rate Other Information Related To Lessee Operating Leases [Table Text Block] Other Information Related To Lessee Operating Leases [Table Text Block] Schedule of other information related to operating leases Schedule of Maturities of Long-Term Debt [Table Text Block] Schedule of maturities of long-term debt outstanding Debt Instrument Redemption [Table Text Block] Schedule of redemption prices expressed as percentages of the principal amount Interest Income and Interest Expense Disclosure [Table Text Block] Schedule of components of net interest expense Disaggregation of Revenue [Table Text Block] Schedule of disaggregated revenue by market strategy Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Schedule of computations of basic and diluted EPS Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block] Schedule of shares excluded from diluted EPS calculation Disclosure of share-based awards granted to executives, non-executive employees and independent members of our Board. Schedule Of Grants Of Share-Based Awards Table [Text Block] Schedule of grants of share-based awards Schedule of Segment Reporting Information, by Segment [Table Text Block] Schedule of financial data by reportable segment Reconciliation of Operating Profit (Loss) from Segments to Consolidated [Table Text Block] Schedule of reconciliation of segment profit or loss to income (loss) before income taxes Segment, Reconciliation of Other Items from Segments to Consolidated [Table Text Block] Schedule of other items regularly provided to the CODM Schedule of Asset Retirement Obligations [Table Text Block] Schedule of asset retirement obligations Schedule of Cash Flow, Supplemental Disclosures [Table Text Block] Schedule of supplemental cash flow information Accounts Receivable, Allowance for Credit Loss [Table Text Block] Allowance for credit losses Schedule of Carrying Values and Estimated Fair Values of Debt Instruments [Table Text Block] Schedule of principal amount and estimated fair value of long-term debt Schedule of Segment Reporting Information, by Segment [Table] Schedule of Segment Reporting Information, by Segment [Table] Segments [Axis] Segments [Domain] Well Intervention [Member] Well Intervention Well Intervention Segment Reporting Information [Line Items] Business Segment Information Number of Reportable Segments Number of reportable segments Number Of Long Term Chartered Vessels Number Of Long Term Chartered Vessels Number of long-term chartered vessels Prepaid Expense, Current Prepaids Income Taxes Receivable, Current Income tax receivable Contract with Customer, Asset, after Allowance for Credit Loss, Current Contract assets (Note 8) Capitalized Contract Cost, Net, Current Deferred costs (Note 8) Other Assets, Miscellaneous, Current Other Prepaid Expense, Noncurrent Prepaid charter Capitalized Contract Cost, Net, Noncurrent Deferred costs (Note 8) Nontrade Receivables, Noncurrent Other receivable Finite-Lived Intangible Assets, Net Intangible assets with finite lives, net Other Assets, Miscellaneous, Noncurrent Other Asset Acquisition, Contingent Consideration [Table] Asset Acquisition, Contingent Consideration [Line Items] Accrued Liabilities, Current [Abstract] Accrued liabilities Employee-related Liabilities, Current Accrued payroll and related benefits Interest Payable, Current Accrued interest Contract with Customer, Liability, Current Deferred revenue (Note 8) Other Accrued Liabilities, Current Other Other Liabilities, Noncurrent [Abstract] Other non-current liabilities Asset Retirement Obligations, Noncurrent Asset retirement obligations (Note 12) Other Accrued Liabilities, Noncurrent Other Operating Lease, Cost Operating lease cost Variable Lease, Cost Variable lease cost Short-Term Lease, Cost Short-term lease cost Sublease Income Sublease income Lease, Cost Net lease cost Property, Plant and Equipment [Table] Long-Lived Tangible Asset [Axis] Long-Lived Tangible Asset [Domain] Vessels [Member] Vessels Vessels Facilities And Equipment [Member] Facilities and Equipment Facilities and Equipment Property, Plant and Equipment [Line Items] Lessee, Operating Lease, Liability, to be Paid, Rolling Maturity [Abstract] Lessee, Operating Lease, Liability, to be Paid, Next Rolling 12 Months Less than one year Lessee, Operating Lease, Liability, to be Paid, Rolling Year Two One to two years Lessee, Operating Lease, Liability, to be Paid, Rolling Year Three Two to three years Lessee, Operating Lease, Liability, to be Paid, Rolling Year Four Three to four years Lessee, Operating Lease, Liability, to be Paid, Rolling Year Five Four to five years Lessee, Operating Lease, Liability, to be Paid, after Rolling Year Five Over five years Lessee, Operating Lease, Liability, to be Paid Total lease payments Lessee, Operating Lease, Liability, Undiscounted Excess Amount Less: imputed interest Operating Lease, Liability Total operating lease liabilities Operating Lease, Weighted Average Remaining Lease Term Weighted average remaining lease term (in years) Operating Lease, Weighted Average Discount Rate, Percent Weighted average discount rate (as a percent) Operating Lease, Payments Cash paid for operating lease liabilities Right-of-Use Asset Obtained in Exchange for Operating Lease Liability Right-of-use assets related to new operating lease liabilities Schedule of Long-Term Debt Instruments [Table] Schedule of Long-term Debt Instruments [Table] Long-Term Debt, Type [Axis] Long-Term Debt, Type [Domain] MARAD Debt Maturing February 2027 [Member] MARAD Debt (matures February 2027) MARAD Debt (matures February 2027) Senior Notes [Member] 2029 Notes (mature March 2029) Debt Instrument [Line Items] Debt Instrument [Line Items] Long-Term Debt, Maturities, Repayments of Principal in Next Rolling 12 Months Less than one year Long-Term Debt, Maturities, Repayments of Principal in Rolling Year Three Two to three years Long-Term Debt, Gross Gross debt Gross debt Principal Amount Debt Instrument, Unamortized Discount Unamortized debt discount Debt Issuance Costs, Noncurrent, Net Unamortized debt issuance costs Long-Term Debt Total debt Represents the asset-based credit agreement (the "ABL Facility") with Bank of America, N.A. ("Bank of America"), Wells Fargo Bank, N.A. and Zions Bancorporation maturing on August 2, 2029. Asset Based Credit Agreement Maturing August 2029 [Member] ABL Facility Maturing August 2029 Geographical [Axis] Geographical [Domain] UNITED STATES United States U.S. UNITED KINGDOM United Kingdom U.K. Variable Rate [Axis] Variable Rate [Domain] Secured Overnight Financing Rate (SOFR) [Member] SOFR Base Rate [Member] Base Rate Interest rate at which banks pay to borrow sterling overnight from other financial institutions and other institutional investors. SONIA SONIA Statistical Measurement [Axis] Statistical Measurement [Domain] Minimum [Member] Minimum Maximum [Member] Maximum Scenario [Axis] Scenario [Domain] Pro Forma [Member] Pro Forma Line of Credit Facility, Maximum Borrowing Capacity Borrowing capacity Debt Instrument, Maturity Date Maturity date Represents the springing maturity period prior to the maturity of outstanding debt with outstanding borrowings of $50 million. Line of Credit Facility, Springing Maturity Period Springing maturity period Represents the threshold amount for outstanding principal with springing maturity. Line of Credit Facility, Springing Maturity Principal Amount Threshold Outstanding principal amount with a springing maturity Maximum commitment increase permitted by ABL Facility. Maximum Commitment Increase Additional commitments (up to) Represents the sub-limit of for the issuance of letters of credit under the line of credit facility. Line of Credit Facility, Letters of Credit Sublimit Sub-limit for the issuance of letters of credit Long-Term Line of Credit Borrowings under ABL Facility Line of Credit Facility, Remaining Borrowing Capacity Available borrowing capacity Percentage of borrowing capacity currently available under the credit facility (current borrowing capacity divided by the amount of borrowing base). Line of Credit Facility, Remaining Borrowing Capacity, Percentage Available borrowing capacity (as a percent of borrowing base) Represents the permitted debt for the deferred purchase price of property under the credit facility. Line of Credit Facility, Permitted Debt for the Deferred Purchase Price of Property and Equipment Permitted debt for the deferred purchase price of property Represents the amount of the borrowing base available to satisfy and maintain fixed charge ratio. Line of Credit Facility, Threshold for Borrowing Base, Fixed Coverage Ratio Availability of the borrowing base to satisfy and maintain fixed charge ratio Letters of Credit Outstanding, Amount Letters of credit issued Debt Instrument, Collateral Amount Amount of cash pledged to the credit facility Debt Instrument, Basis Spread on Variable Rate Basis spread on variable rate (as a percent) Percentage points adjusted to the reference rate to compute the variable rate on the debt instrument. Debt Instrument, Adjustment on Variable Rate Adjustment on variable rate (as a percent) Debt Instrument, Interest Rate, Stated Percentage Interest rate (as a percent) Line of Credit Facility, Unused Capacity, Commitment Fee Percentage Commitment fee percentage Represents the fixed charge coverage ratio. Fixed Charge Coverage Ratio Fixed charge coverage ratio Debt Instrument, Frequency of Periodic Payment Frequency of periodic payment Guarantor Obligations, Liquidation Proceeds, Percentage Guarantor obligations (as a percent) Debt Instrument, Maturity Date, Description Maturity date Measurement input accounting for the occurrence of a change in control triggering event. Change of Control Change of Control Debt Instrument, Redemption, Period [Axis] Debt Instrument, Redemption, Period [Domain] Debt Instrument, Redemption, Period One [Member] 2026 Debt Instrument, Redemption, Period Two [Member] 2027 Debt Instrument, Redemption, Period Three [Member] 2028 and thereafter Debt Instrument, Redemption Price, Percentage of Principal Amount Redeemed Redemption as a percentage of principal amount (as a percent) Debt Instrument, Redemption Price, Percentage Redemption price as a percentage of principal amount (as a percent) Interest Expense, Nonoperating Interest expense Interest Income, Other Interest income Income Tax Paid, by Individual Jurisdiction [Table] Income Tax Paid, by Individual Jurisdiction [Line Items] Income Tax Expense (Benefit), Effective Income Tax Rate Reconciliation, Amount [Abstract] Effective Income Tax Rate Reconciliation, Amount [Abstract] Effective Income Tax Rate Reconciliation, Percent [Abstract] Effective Tax Rate Reconciliation, Percent [Abstract] Effective Income Tax Rate Reconciliation, Percent Effective income tax Class of Treasury Stock [Table] Share Repurchase Program [Axis] Share Repurchase Program [Domain] Represents the second stock purchase program. 2023 Repurchase Program 2023 Repurchase Program Equity, Class of Treasury Stock [Line Items] Share Repurchase Programs Share Repurchase Program, Authorized, Amount Authorized repurchase amount Share Repurchase Program, Remaining Authorized, Amount Remaining amount authorized for repurchase Disaggregation of Revenue [Table] Disaggregation of Revenue [Table] Product and Service [Axis] Product and Service [Domain] Services in achieving production maximization of existing oil and gas reserves. Production Maximization [Member] Production maximization Services in decommissioning end-of-life oil and gas fields. Decommissioning [Member] Decommissioning Services supporting renewable energy development. Renewables [Member] Renewables Service, Other [Member] Other Robotics [Member] Robotics Robotics Operating segments classified as Shallow Water Abandonment. Shallow Water Abandonment Shallow Water Abandonment Production Facilities [Member] Production Facilities Production Facilities Consolidation Items [Axis] Consolidation Items [Domain] Operating Segments [Member] Reportable Segments Intersegment Eliminations [Member] Intercompany Eliminations Disaggregation of Revenue [Line Items] Revenue From Contracts With Customers Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] Revenue From Contracts With Customers Contract with Customer, Asset, after Allowance for Credit Loss Net contract assets Contract with Customer, Asset, Credit Loss Expense (Reversal) Credit losses on contract assets Contract with Customer, Liability Contract liabilities Contract with Customer, Liability, Revenue Recognized Revenue recognized Revenue, Remaining Performance Obligation, Amount Unsatisfied performance obligations Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period Expected timing of satisfaction Capitalized Contract Cost, Net Deferred contract costs Capitalized Contract Cost, Amortization Amortization of deferred contract costs Capitalized Contract Cost, Impairment Loss Impairment losses on deferred contract costs Earnings Per Share, Basic [Abstract] Basic: Undistributed Earnings (Loss) Allocated to Participating Securities, Basic Less: Undistributed earnings allocated to participating securities Net Income (Loss) Available to Common Stockholders, Basic Net income (loss) available to common shareholders, basic Net income (loss) available to common shareholders, basic Earnings Per Share, Diluted [Abstract] Diluted: Weighted Average Number of Shares Outstanding, Diluted, Adjustment [Abstract] Effect of dilutive securities: Incremental Common Shares Attributable to Dilutive Effect of Share-Based Payment Arrangements Share-based awards other than participating securities (in shares) Net Income (Loss) Available to Common Stockholders, Diluted Net income (loss) available to common shareholders, diluted Antidilutive Security, Excluded EPS Calculation [Table] Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Antidilutive Securities [Axis] Antidilutive Securities, Name [Domain] Share-Based Payment Arrangement [Member] Share-based awards Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Earnings Per Share Incremental Common Shares Attributable to Participating Nonvested Shares with Non-forfeitable Dividend Rights Share-based awards The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU) including nonvested share-based payment awards that contain non-forfeitable rights to dividends or dividend equivalents. Weighted Average Number of Shares Outstanding, Including Incremental Shares, Diluted Total Schedule of Share-Based Compensation Arrangements by Share-Based Payment Award [Table] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Incentive Plan 2005 [Member] 2005 Incentive Plan 2005 Incentive Plan Restricted Stock [Member] Restricted Stock Performance Shares [Member] PSUs Restricted Stock Units (RSUs) [Member] RSUs Fixed Value Cash Awards Fixed Value Cash Awards Fixed Value Cash Awards Employee Stock [Member] ESPP Scenario, Plan [Member] Assumed Retirement Plan Type [Axis] Retirement Plan Type [Domain] Qualified Plan [Member] Deferred Contribution Plans Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] Employee Benefit Plans The number of active incentive compensation plans. Number Of Active Incentive Plans Number of active incentive plans Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant Shares available for issuance (in shares) The number of components of service or performance based units awarded based on service and market conditions. Share-based Compensation Arrangement by Share-based Payment Award, Components of Equity Awards Granted Number of components of equity awards granted The percentage of service or performance based units awarded based on service and market conditions. Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage Based on Service and Market Conditions Percentage based on service and market conditions The percentage of service or performance based units awarded based on service and performance conditions. Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage Based on Service and Performance Conditions Percentage based on service and performance conditions Share-Based Payment Arrangement, Expensed and Capitalized, Amount Compensation cost Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Term Performance Period Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period Share-based payment awards vested (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights, Percentage Award vesting percentage Vesting Percentage Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Share-Based Liabilities Paid Cash paid for awards vested Deferred Compensation Arrangement with Individual, Cash Award Granted, Amount Long-term incentive cash awards granted Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period Vesting Period Vesting period Deferred Compensation Arrangement with Individual, Compensation Expense Deferred compensation cost Defined Contribution Plan, Cost Plan cost recognized Share-Based Compensation Arrangement by Share-Based Payment Award, Maximum Number of Shares Per Employee Purchase limit per employee (in shares) Grantee Status [Axis] Grantee Status [Domain] Executive Officer [Member] Officers Grant date of share-based payment award. Share Based Compensation Arrangement By Share Based Payment Award Grant Date Date of Grant Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period Shares/Units granted Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value Grant Date Fair Value Per Share/Unit Vesting date of share-based payment award. Share Based Compensation Arrangement By Share Based Payment Award Vesting date Vesting Date Reportable Segment, Aggregation before Other Operating Segment [Member] Reportable Segment, Aggregation before Other Operating Segment Operating Income (Loss) [Abstract] Less: Operating Costs and Expenses Operations support Segment Reporting, Reconciling Item, Corporate Nonsegment [Member] Corporate, eliminations and other Amount of income (expense) related to income from oil and gas royalty interest and other nonoperating activities. Other Nonoperating Income (Expense) and Royalty Income Other non-operating income, net Segment, Expenditure, Addition to Long-Lived Assets Capital expenditures Depreciation, Depletion and Amortization Depreciation and amortization Asset Retirement Obligation, Roll Forward Analysis [Roll Forward] Changes in our AROs: Asset Retirement Obligation AROs at end of period AROs at beginning of year Asset Retirement Obligation, Accretion Expense Accretion expense Commitments And Contingencies [Table] Commitments And Contingencies [Table] Commitments And Contingencies [Table] Represents the information pertaining to Patriot. Patriot [Member] Patriot Commitments And Contingencies [Line Items] Commitments And Contingencies [Line Items] Commitments And Contingencies [Line Items] Term of charter agreement in years. Term Of Charter Agreement Term of charter agreement Unusual or Infrequent Item, or Both [Table] Unusual or Infrequent Item, or Both [Line Items] Supplemental cash flow information Interest Paid, Excluding Capitalized Interest, Operating Activities Interest paid Income Taxes Paid, Net Income taxes paid, net Supplemental Cash Flow Information Related Text Income Tax Refunds Proceeds from Income Tax Refunds Tax refunds Capital Expenditures Incurred but Not yet Paid Non-cash capital additions Financing Receivable, Allowance for Credit Loss [Table] Schedule of Allowance for Credit Loss [Table] Financing Receivable, Allowance for Credit Loss [Line Items] Allowance Accounts Accounts Receivable, Allowance for Credit Loss [Roll Forward] Allowance for credit losses Accounts Receivable, Credit Loss Expense (Reversal) Additions (reductions) Fair Value, Recurring and Nonrecurring [Table] Fair Value, Recurring and Nonrecurring [Table] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Fair Value Measurements Long-Term Debt, Fair Value Fair Value Subsequent Event [Table] Subsequent Event Type [Axis] Subsequent Event Type [Domain] Subsequent Event [Member] Subsequent Event Ownership [Axis] Ownership [Domain] Represents the Helix Energy Solutions Group legal entity. Helix Energy Solutions [Member] Helix Energy Solutions Represents the Hornbeck legal entity. Hornbeck [Member] Hornbeck Subsequent Event [Line Items] Percentage of ownership of equity interest. Equity Ownership, Percentage