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 Entity 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 Statement of Financial Position [Abstract] Assets [Abstract] ASSETS Assets, Current [Abstract] Current assets: Cash and Cash Equivalents, at Carrying Value Cash and cash equivalents Restricted Cash and Cash Equivalents, Current Restricted cash Accounts Receivable, after Allowance for Credit Loss, Current Accounts receivable, net of allowance for credit losses of $1,351 and $1,477, 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 Other Assets, Noncurrent Other assets, net Total other assets, net Assets Total 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 Stockholders' Equity Attributable to Parent [Abstract] Shareholders' equity: Common Stock, Value, Issued Common stock, no par, 240,000 shares authorized, 151,637 and 151,124 shares issued, respectively Retained Earnings (Accumulated Deficit) Retained earnings Accumulated Other Comprehensive Income (Loss), Net of Tax Accumulated other comprehensive loss Stockholders' 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 Income Statement [Abstract] Revenue from Contract with Customer, Excluding Assessed Tax Net revenues Net revenues Cost of Revenue Cost of sales Gross Profit Gross profit (loss) Selling, General and Administrative Expense Selling, general and administrative expenses Operating Income (Loss) Income (loss) from operations Loss from operations Interest Income (Expense), Nonoperating, Net 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 Loss before income taxes Income Tax Expense (Benefit) Income tax provision Income tax expense Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Net loss Net loss Net Income (Loss) Attributable to Redeemable Noncontrolling Interest Net loss attributable to redeemable noncontrolling interests Net loss Net Income (Loss) Attributable to Parent Net loss attributable to common shareholders Net loss attributable to common shareholders Net loss Earnings Per Share, Basic and Diluted [Abstract] Loss per share of common stock: Earnings Per Share, Basic Basic Earnings Per Share, Diluted Diluted Weighted Average Number of Shares Outstanding, Diluted [Abstract] Weighted average common shares outstanding (in shares) Weighted Average Number of Shares Outstanding, Basic Basic Weighted average number of shares outstanding, basic (in shares) Weighted Average Number of Shares Outstanding, Diluted Diluted Weighted average number of shares outstanding, diluted (in shares) Diluted shares (as reported) Statement of Comprehensive Income [Abstract] Other Comprehensive Income (Loss), Net of Tax [Abstract] Other comprehensive income (loss), net of tax: Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax Foreign currency translation gain (loss) Foreign currency translation adjustments Other Comprehensive Income (Loss), Net of Tax Other comprehensive income (loss), net of tax Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest Comprehensive income (loss) Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest [Abstract] Less comprehensive loss attributable to redeemable noncontrolling interests: Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax, Portion Attributable to Noncontrolling Interest Foreign currency translation gain Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest Comprehensive loss attributable to redeemable noncontrolling interests Comprehensive Income (Loss), Net of Tax, Attributable to Parent Comprehensive income (loss) attributable to common shareholders Statement of Stockholders' Equity [Abstract] Statement [Table] Statement [Table] Equity Components [Axis] Equity Component [Domain] Common Stock Retained Earnings Accumulated Other Comprehensive Income (Loss) Cumulative Effect, Period of Adoption [Axis] Cumulative Effect, Period of Adoption [Domain] Cumulative Effect, Period of Adoption Accounting Standards Update [Axis] Type of Adoption [Domain] Accounting Standards Update 2020-06 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) Accretion Of Redeemable Noncontrolling Interests Less: Accretion of redeemable noncontrolling interests Accretion of redeemable noncontrolling interests Aggregate cost for capped call transactions in connection with issuance of convertible debt instruments. Aggregate Cost, Debt Instrument, Convertible, Associated Capped Call Transactions Cost Capped call transactions Aggregate cost of capped call transactions Shares Issued, Value, Share-based Payment Arrangement, after Forfeiture Activity in company stock plans, net and other Shares Issued, Shares, Share-based Payment Arrangement, after Forfeiture Activity in company stock plans, net and other (in shares) APIC, Share-based Payment Arrangement, Increase for Cost Recognition Share-based compensation Increase (Decrease) in Temporary Equity [Roll Forward] Increase (Decrease) in Redeemable Noncontrolling Interests [Roll Forward] Temporary Equity, Carrying Amount, Including Portion Attributable to Noncontrolling Interests Balance, end of period Balance, beginning of period Temporary Equity, Net Income Net loss Temporary Equity, Foreign Currency Translation Adjustments Foreign currency translation adjustments related to redeemable noncontrolling interests Temporary Equity, Accretion to Redemption Value Accretion of redeemable noncontrolling interests Statement of Cash Flows [Abstract] Long-term Debt, Type [Axis] Long-term Debt, Type [Domain] Term Loan Maturing December 2021 [Member] Term Loan Repaid September 2021 Nordea Q5000 Loan Maturing January 2021 Nordea Q5000 Loan Matured January 2021 MARAD Debt Maturing February 2027 [Member] MARAD Debt Maturing February 2027 Net Cash Provided by (Used in) Operating Activities [Abstract] Cash flows from operating activities: Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Adjustments to reconcile net loss to net cash provided by (used in) operating activities: Depreciation, Depletion and Amortization Depreciation and amortization 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 Foreign Currency Transaction Gain (Loss), Unrealized Unrealized foreign currency (gain) loss Increase (Decrease) in Operating Capital [Abstract] Changes in operating assets and liabilities: Increase (Decrease) in Accounts Receivable Accounts receivable, net Increase (Decrease) in Income Taxes Receivable Income tax receivable Increase (Decrease) in Other Current Assets Other current assets 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 (used in) 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 loan debt Repayment of Term Loan Payments of Financing Costs Debt issuance costs 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 Effect of exchange rate changes on cash and cash equivalents and restricted cash Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect Net decrease in cash and cash equivalents and restricted cash Cash and Cash Equivalents, at Carrying Value [Abstract] Cash and cash equivalents and restricted cash: Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents Balance, end of period Balance, beginning of year Organization, Consolidation and Presentation of Financial Statements [Abstract] Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] Basis Of Presentation And New Accounting Standards Nature of Operations [Text Block] Company Overview Supplemental Balance Sheet Disclosures [Text Block] Details Of Certain Accounts Leases [Abstract] Lessee, Operating Leases [Text Block] Leases Debt Disclosure [Abstract] Long-term Debt [Text Block] Long-term Debt Income Tax Disclosure [Abstract] Income Tax Disclosure [Text Block] Income Taxes Revenue from Contract with Customer [Abstract] Revenue from Contract with Customer [Text Block] Revenue From Contracts With Customers Earnings Per Share [Abstract] Earnings Per Share [Text Block] Earnings Per Share Share-based Payment Arrangement [Abstract] Compensation and Employee Benefit Plans [Text Block] Employee Benefit Plans Segment Reporting [Abstract] Segment Reporting Disclosure [Text Block] Business Segment Information Asset Retirement Obligation Disclosure [Abstract] Asset Retirement Obligation Disclosure [Text Block] Asset Retirement Obligations Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Disclosure [Text Block] Commitments And Contingencies And Other Matters Supplemental Cash Flow Information [Abstract] Cash Flow, Supplemental Disclosures [Text Block] Statement Of Cash Flow Information Credit Loss [Abstract] Allowance for Credit Losses [Text Block] Allowance for Credit Losses Fair Value Disclosures [Abstract] Fair Value Disclosures [Text Block] Fair Value Measurements 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, 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 Interest Income and Interest Expense Disclosure [Table Text Block] Schedule of components of net interest expense Disaggregation of Revenue [Table Text Block] Schedule of disaggregation of revenue 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 Schedule Of Intercompany Segment Revenues [Table Text Block] Schedule Of Intercompany Segment Revenues [Table Text Block] Schedule of intercompany segment revenues Reconciliation of Assets from Segment to Consolidated [Table Text Block] Schedule of total assets by reportable segment 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] Schedule of activities in 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 Segment Reporting Information [Line Items] Segment Reporting Information [Line Items] 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 Contract with Customer, Asset, after Allowance for Credit Loss, Current Contract assets Prepaid Expense, Current Prepaids Capitalized Contract Cost, Net, Current Deferred costs Income Taxes Receivable, Current Income tax receivable Nontrade Receivables, Current Other receivable Other Assets, Miscellaneous, Current Other Deferred recertification and dry dock costs, Net Deferred Recertification And Dry Dock Costs, Net Deferred recertification and dry dock costs, net Capitalized Contract Cost, Net, Noncurrent Deferred costs Prepaid Expense, Noncurrent Prepaid charter Finite-Lived Intangible Assets, Net Intangible assets with finite lives, net Other Assets, Miscellaneous, Noncurrent Other Employee-related Liabilities, Current Accrued payroll and related benefits Interest Payable, Current Accrued interest Contract with Customer, Liability, Current Deferred revenue Asset Retirement Obligation, Current Asset retirement obligations Other Accrued Liabilities, Current Other Contract with Customer, Liability, Noncurrent Deferred revenue Other Accrued Liabilities, Noncurrent Other Lease, Cost [Abstract] 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] Property, Plant and Equipment, Type [Domain] Vessels [Member] Vessels Facilities And Equipment [Member] Facilities and Equipment Property, Plant and Equipment [Line Items] Lessee, Operating Lease, Liability, Payment, Due, Rolling Maturity [Abstract] Lessee, Operating Lease, Liability, Payments, Due Next Rolling Twelve Months Less than one year Lessee, Operating Lease, Liability, Payments, Due in Rolling Year Two One to two years Lessee, Operating Lease, Liability, Payments, Due in Rolling Year Three Two to three years Lessee, Operating Lease, Liability, Payments, Due in Rolling Year Four Three to four years Lessee, Operating Lease, Liability, Payments, Due in Rolling Year Five Four to five years Lessee, Operating Lease, Liability, Payments, Due 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 obtained in exchange for new operating lease obligations Schedule of Long-term Debt Instruments [Table] Schedule of Long-term Debt Instruments [Table] Convertible Senior Notes Maturing May 2022 [Member] Convertible Senior Notes Maturing May 2022 Convertible Senior Notes Maturing September 2023 Convertible Senior Notes Maturing September 2023 Convertible Senior Notes Maturing February 2026 Convertible Senior Notes Maturing February 2026 Debt Instrument [Line Items] Debt Instrument [Line Items] Long-term Debt, Maturities, Repayments of Principal in Next Rolling Twelve Months Less than one year Long-term Debt, Maturities, Repayments of Principal in Rolling Year Two One to two years Long-term Debt, Maturities, Repayments of Principal in Rolling Year Three Two to three years Long-term Debt, Maturities, Repayments of Principal in Rolling Year Four Three to four years Long-term Debt, Maturities, Repayments of Principal in Rolling Year Five Four to five years Long-term Debt, Gross Principal amount Gross debt 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 September 30, 2026. ABL Facility Maturing September 2026 Geographical [Axis] Geographical [Domain] United States United Kingdom Variable Rate [Axis] Variable Rate [Domain] LIBOR Base Rate Interest rate at which banks pay to borrow sterling overnight from other financial institutions and other institutional investors. SONIA SOFR Statistical Measurement [Axis] Statistical Measurement [Domain] Minimum Maximum Subsequent Event Type [Axis] Subsequent Event Type [Domain] Subsequent Event Scenario [Axis] Scenario [Domain] 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 Revolving Credit Facility 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 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 Represents the period prior to the maturity of outstanding debt to maintain a pro forma minimum excess availability. Line of Credit Facility, Period Prior to Maturity to Maintain Excess Availability Period prior to maturity to maintain a pro forma minimum excess availability Letters of Credit Outstanding, Amount Letters of credit issued Debt Instrument, Basis Spread on Variable Rate Basis spread 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 Debt Instrument, Convertible, Conversion Ratio Initial conversion ratio The number of shares that the holder of the call would receive if converted to equity. Debt Instrument, Convertible, Number of Shares Aggregate number of shares Debt Instrument, Convertible, Conversion Price Initial conversion price per share (USD per share) Debt Instrument, Convertible, Threshold Percentage of Stock Price Trigger Percentage of closing price of common stock to conversion price Debt Instrument, Convertible, Threshold Trading Days Number of trading days Debt Instrument, Convertible, Threshold Consecutive Trading Days Number of consecutive trading days The increase in ratio applied to the conversion of debt instrument into equity with equity shares divided by debt principal amount under certain corporate activity . Debt Instrument, Convertible, Increase in Conversion Ratio for Corporate Activity Increase in the conversion rate Debt Instrument, Redemption Price, Percentage of Principal Amount Redeemed Redemption price as a percentage of principal amount Debt Instrument, Interest Rate, Effective Percentage Effective interest rate (as a percent) Interest Expense Interest expense Amount of the cost of borrowed funds accounted for as coupon interest expense. Coupon Interest Expense Coupon interest expense Option Indexed to Issuer's Equity, Type [Axis] Option Indexed to Issuer's Equity, Type [Domain] 2026 Capped Calls Option Indexed to Issuer's Equity, Indexed Shares Aggregate number of common shares subject to capped calls Option Indexed to Issuer's Equity, Strike Price Initial strike price Cap price stated in the contract for options indexed to the issuer's equity shares. Cap Call, Cap Price Initial cap price Guarantor Obligations, Liquidation Proceeds, Percentage Guarantor obligations (as a percent) Debt Instrument, Maturity Date, Description Maturity date Debt Instrument, Periodic Payment Terms, Balloon Payment to be Paid Balloon payment Revolving Credit Facility Maturing December 2021 [Member] Revolving Credit Facility Previously Maturing December 2021 Interest Income, Other Interest income Effective Income Tax Rate Reconciliation, Percent Effective tax rate Disaggregation of Revenue [Table] Disaggregation of Revenue [Table] Contract with Customer, Duration [Axis] Contract with Customer, Duration [Domain] Short-term Long-term Robotics [Member] Robotics Production Facilities [Member] Production Facilities Consolidation Items [Axis] Consolidation Items [Domain] Intercompany Eliminations Disaggregation of Revenue [Line Items] Disaggregation of Revenue [Line Items] Contract with Customer, Asset, after Allowance for Credit Loss 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 Capitalized Contract Cost, Net Deferred contract costs Capitalized Contract Cost, Amortization Amortization of deferred contract costs 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, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] Revenue, Remaining Performance Obligation, Amount Unsatisfied performance obligations Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period Expected timing of satisfaction Earnings Per Share, Basic, Two Class Method [Abstract] Basic and Diluted: Undistributed Earnings, Basic Net loss available to common shareholders, basic Net Income (Loss) Available to Common Stockholders, Diluted Net income (loss) available to common shareholders, diluted Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] 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 Antidilutive Securities [Axis] Antidilutive Securities, Name [Domain] Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Antidilutive securities (in shares) 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 [Domain] Incentive Plan 2005 [Member] 2005 Incentive Plan Restricted Stock PSUs RSUs Fixed Value Cash Awards Fixed Value Cash Awards ESPP Class of Stock [Axis] Class of Stock [Domain] Retirement Plan Type [Axis] Retirement Plan Type [Domain] 401(k) Plan Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant Shares available for issuance (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period Shares/Units Stock awards granted (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, Vested in Period, Fair Value Fair value of 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, Employer Matching Contribution, Percent of Match Employer matching contribution (as a percent) Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay Employer matching contribution percent of employees' salary (up to) 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 Officers Board of Directors Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items] Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items] 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, 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 Segments Corporate, Eliminations and Other Asset Retirement Obligation, Roll Forward Analysis [Roll Forward] Asset Retirement Obligation, Roll Forward Analysis [Roll Forward] Asset Retirement Obligation AROs at end of period AROs at beginning of year Asset Retirement Obligation, Accretion Expense Accretion expense 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, net of interest capitalized Income Taxes Paid 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 for Credit Loss [Line Items] Accounts Receivable, Allowance for Credit Loss [Roll Forward] Accounts Receivable, Allowance for Credit Loss [Roll Forward] Accounts Receivable, Credit Loss Expense (Reversal) Additions (reductions) Accounts Receivable, Allowance for Credit Loss, Writeoff Write-offs 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, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Long-term Debt, Fair Value Fair value