Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Instruments, Gain (Loss) [Table]
Derivative Instruments, Gain (Loss) [Table]
Derivative Instrument [Axis]
Derivative Instrument [Axis]
Derivative Contract Type [Domain]
Derivative Contract [Domain]
Foreign Exchange Contracts
Foreign Exchange Contract [Member]
Interest Rate Swaps
Interest Rate Swap [Member]
Income Statement Location [Axis]
Income Statement Location [Axis]
Income Statement and Other Comprehensive Income (Loss) Location [Domain]
Income Statement Location [Domain]
Cost of Sales
Cost of Sales [Member]
Net Interest Expense
Interest Expense [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Reclassified from Accumulated OCI into Earnings (Effective Portion)
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, before Tax
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis Of Presentation And New Accounting Standards
Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block]
Company Overview
Nature of Operations [Text Block]
Debt Disclosure [Abstract]
Schedule of Long-term Debt Instruments [Table]
Schedule of Long-term Debt Instruments [Table]
Long-term Debt, Type [Axis]
Long-term Debt, Type [Axis]
Long-term Debt, Type [Domain]
Long-term Debt, Type [Domain]
Term Loan Maturing June 2020
Term Loan Maturing June 2020 [Member]
Term Loan Maturing June 2020 [Member]
Term Loan and Revolving Loans
Term Loan And Revolving Loans [Member]
Term loan and revolving loans
Revolving Credit Facility Maturing June 2020
Revolving Credit Facility Maturing June 2020 [Member]
Revolving Credit Facility Maturing June 2020 [Member]
Letter of Credit
Letter of Credit [Member]
Variable Rate [Axis]
Variable Rate [Axis]
Variable Rate [Domain]
Variable Rate [Domain]
Base Rate
Base Rate [Member]
LIBOR
London Interbank Offered Rate (LIBOR) [Member]
Range [Axis]
Range [Axis]
Range [Domain]
Range [Domain]
Minimum
Minimum [Member]
Maximum
Maximum [Member]
Debt Instrument Payment Schedule [Axis]
Debt Instrument Payment Schedule [Axis]
Information about timing of debt payments under terms of the debt agreement.
Debt Instrument Payment Schedule [Domain]
Debt Instrument Payment Schedule [Domain]
Information about debt payment schedule under the terms of the debt agreement.
First Loan Year
Payment Period One [Member]
Payment Period One [Member]
Second Loan Year
Payment Period Two [Member]
Payment Period Two [Member]
Third Loan Year
Payment Period Three [Member]
Payment Period Three [Member]
Collateral [Axis]
Collateral [Axis]
Collateral [Domain]
Collateral [Domain]
Collateral Pledged
Collateral Pledged [Member]
Debt Instrument [Line Items]
Debt Instrument [Line Items]
Principal amount
Long-term Debt, Gross
Borrowing capacity
Line of Credit Facility, Maximum Borrowing Capacity
Additional commitments
Maximum Aggregate Commitment Increase
Maximum aggregate commitments with respect to an increase in the Revolving Credit Facility, additional term loans, or a combination thereof that may be requested under the Credit Agreement.
Repayment of term loan
Repayments of Other Long-term Debt
Available borrowing capacity
Line of Credit Facility, Remaining Borrowing Capacity
Letters of credit issued
Letters of Credit Outstanding, Amount
Basis spread on variable rate (as a percent)
Debt Instrument, Basis Spread on Variable Rate
Interest rate (as a percent)
Debt Instrument, Interest Rate, Stated Percentage
Commitment fee percentage
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage
Frequency of periodic payment
Debt Instrument, Frequency of Periodic Payment
Periodic principal payment (as a percent)
Debt Instrument Periodic Principal Payment Percentage
Required periodic principal payments per loan year as a percentage of total principal.
Maturity date
Debt Instrument, Maturity Date
Maximum percent of shares of foreign subsidiaries
Maximum Percent Of Shares Of Foreign Subsidiaries
Maximum percent of shares of certain foreign subsidiaries
Loss on extinguishment of long-term debt
Gain (Loss) on Extinguishment of Debt
Schedule of Segment Reporting Information, by Segment [Table]
Schedule of Segment Reporting Information, by Segment [Table]
Segments [Axis]
Segments [Axis]
Segment [Domain]
Segments [Domain]
Well Intervention
Well Intervention [Member]
Well Intervention [Member]
Robotics
Robotics [Member]
Robotics [Member]
Segment Reporting Information [Line Items]
Segment Reporting Information [Line Items]
Number of reportable segments
Number of Reportable Segments
Number of chartered vessels
Number Of Chartered Vessels
Number Of Chartered Vessels
Statement of Cash Flows [Abstract]
Cash flows from operating activities:
Net Cash Provided by (Used in) Operating Activities [Abstract]
Net income (loss)
Net Income (Loss) Attributable to Parent
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract]
Depreciation and amortization
Depreciation, Depletion and Amortization
Amortization of debt discount
Amortization of Debt Discount (Premium)
Amortization of debt issuance costs
Amortization of Debt Issuance Costs
Share-based compensation
Share-based Compensation
Deferred income taxes
Deferred Income Tax Expense (Benefit)
Equity in losses of investment
Loss From Equity Method Investments
Loss From Equity Method Investments
Loss on disposition of assets, net
Gain (Loss) on Disposition of Property Plant Equipment, Excluding Oil and Gas Property and Timber Property
Loss on extinguishment of long-term debt
Unrealized gain on derivative contracts, net
Unrealized Gain (Loss) on Derivatives
Changes in operating assets and liabilities:
Increase (Decrease) in Operating Capital [Abstract]
Accounts receivable, net
Increase (Decrease) in Accounts Receivable
Other current assets
Increase (Decrease) in Other Current Assets
Income tax payable / receivable
Increase (Decrease) in Income Taxes Payable, Net of Income Taxes Receivable
Accounts payable and accrued liabilities
Increase (Decrease) in Accounts Payable and Accrued Liabilities
Other non-current, net
Increase (Decrease) in Other Noncurrent Assets and Liabilities, Net
Net cash provided by operating activities
Net Cash Provided by (Used in) Operating Activities, Continuing Operations
Cash flows from investing activities:
Net Cash Provided by (Used in) Investing Activities [Abstract]
Capital expenditures
Payments to Acquire Productive Assets
Proceeds from sale of assets
Proceeds from Sale of Property, Plant, and Equipment
Net cash used in investing activities
Net Cash Provided by (Used in) Investing Activities, Continuing Operations
Cash flows from financing activities:
Net Cash Provided by (Used in) Financing Activities [Abstract]
Issuance of Convertible Senior Notes due 2023
Proceeds from Convertible Debt
Repurchase of Convertible Senior Notes due 2032
Repayments of Convertible Debt
Proceeds from term loan
Proceeds from Issuance of Other Long-term Debt
Repayment of term loan
Repayment of Nordea Q5000 Loan
Repayments of Secured Debt
Repayment of MARAD Debt
Repayments Of Long Term Secured Debt
The cash outflows from the payment of collateralized debt obligation (backed by a lien on the entity's assets) to MARAD, a U.S. governmental agency.
Debt issuance costs
Payments of Financing Costs
Net proceeds from issuance of common stock
Proceeds from Issuance of Common Stock
Payments related to tax withholding for share-based compensation
Payments Related to Tax Withholding for Share-based Compensation
Proceeds from issuance of ESPP shares
Proceeds from Stock Plans
Net cash provided by (used in) financing activities
Net Cash Provided by (Used in) Financing Activities, Continuing Operations
Effect of exchange rate changes on cash and cash equivalents
Effect of Exchange Rate on Cash and Cash Equivalents
Net increase in cash and cash equivalents
Cash and Cash Equivalents, Period Increase (Decrease)
Cash and cash equivalents:
Cash and Cash Equivalents, at Carrying Value [Abstract]
Balance, beginning of year
Cash and Cash Equivalents, at Carrying Value
Balance, end of period
Long-Term Debt
Debt Disclosure [Text Block]
Schedule of balance sheet location and fair value of derivative instruments designated as hedging instruments
Schedule of Cash Flow Hedging Instruments, Statements of Financial Performance and Financial Position, Location [Table Text Block]
Schedule of balance sheet location and fair value of derivative instruments not designated as hedging instruments
Derivatives Not Designated as Hedging Instruments [Table Text Block]
Schedule of unrealized gain (loss) recognized in OCI
Schedule of Derivative Instruments, Effect on Other Comprehensive Income (Loss) [Table Text Block]
Schedule of gain (loss) reclassified from Accumulated OCI into earnings
Schedule of Cash Flow Hedges Included in Accumulated Other Comprehensive Income (Loss) [Table Text Block]
Schedule of impact of derivative instruments not designated as hedging instruments on consolidated statements of operations
Schedule Of Impact Of Derivative Instruments Not Designated As Hedging Instruments On Consolidated Statement Of Operations [Table Text Block]
Schedule Of Impact Of Derivative Instruments Not Designated As Hedging Instruments On Consolidated Statement Of Operations [Table Text Block]
Schedule of other current assets
Schedule of Other Current Assets [Table Text Block]
Schedule of other assets, net
Schedule of Other Assets, Noncurrent [Table Text Block]
Schedule of accrued liabilities
Schedule of Accrued Liabilities [Table Text Block]
Schedule of other non-current liabilities
Other Noncurrent Liabilities [Table Text Block]
Schedule of the impact of ASC Topic 606
Schedule of New Accounting Pronouncements and Changes in Accounting Principles [Table Text Block]
Consolidated Leverage Ratio, Period [Axis]
Consolidated Leverage Ratio, Period [Axis]
Consolidated Leverage Ratio, Period [Axis]
Consolidated Leverage Ratio, Period [Domain]
Consolidated Leverage Ratio, Period [Domain]
[Domain] for Consolidated Leverage Ratio, Period [Axis]
June 30, 2018
Period 1 [Member]
Period 1 [Member]
September 30, 2018 and each fiscal quarter thereafter
Period 2 [Member]
Period 2 [Member]
Debt Instrument [Axis]
Debt Instrument [Axis]
Debt Instrument, Name [Domain]
Debt Instrument, Name [Domain]
Amended and Restated Credit Agreement
Amended and Restated Credit Agreement [Member]
Amended and Restated Credit Agreement dated June 30, 2017
Maximum Consolidated Secured Leverage Ratio
Maximum Consolidated Secured Leverage Ratio
Maximum Ratio of Consolidated Secured Indebtedness to Consolidated EBITDA.
Accrued payroll and related benefits
Employee-related Liabilities, Current
Deferred revenue (Note 9)
Deferred Revenue, Current
Derivative liability (Note 15)
Hedging Liabilities, Current
Other
Other Accrued Liabilities, Current
Total accrued liabilities
Accrued Liabilities, Current
Supplemental Cash Flow Information [Abstract]
Non-cash capital additions
Capital Expenditures Incurred but Not yet Paid
Investee losses in excess of investment (Note 5)
Investee Losses in Excess of Investment
This item represents a liability for the entity's share of investee losses in excess of investment carrying amount. It is calculated as the entity's ownership percentage in the investee multiplied by the investee's negative equity.
Deferred gain on sale of property
Deferred Gain on Sale of Property
Deferred revenue (Note 9)
Deferred Revenue, Noncurrent
Derivative liability (Note 15)
Derivative Liability, Noncurrent
Other
Other Liabilities and Deferred Revenue, Noncurrent
Total other non-current liabilities
Other Liabilities, Noncurrent
Term of lease agreement
Lessee, Operating Lease, Term of Contract
Earnings Per Share [Abstract]
Computations of basic and diluted EPS
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
Schedule of shares excluded from diluted per share calculation
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block]
Convertible Senior Notes Maturing May 2022
Convertible Senior Notes Maturing May 2022 [Member]
Convertible Senior Notes Maturing May 2022 [Member]
Convertible Senior Notes Maturing September 2023
Convertible Senior Notes Maturing September 2023 [Member]
Convertible Senior Notes Maturing September 2023
MARAD Debt Maturing February 2027
MARAD Debt Maturing February 2027 [Member]
MARAD Debt Maturing February 2027 [Member]
Nordea Q5000 Loan Maturing April 2020
Nordea Q5000 Loan Maturing April 2020 [Member]
Nordea Q5000 Loan Maturing April 2020 [Member]
Less than one year
Long-term Debt, Maturities, Repayments of Principal in Next Rolling Twelve Months
One to two years
Long-term Debt, Maturities, Repayments of Principal in Rolling Year Two
Two to three years
Long-term Debt, Maturities, Repayments of Principal in Rolling Year Three
Three to four years
Long-term Debt, Maturities, Repayments of Principal in Rolling Year Four
Four to five years
Long-term Debt, Maturities, Repayments of Principal in Rolling Year Five
Over five years
Long-term Debt, Maturities, Repayments of Principal in Rolling after Year Five
Total debt
Current maturities
Long-term Debt, Current Maturities
Long-term debt, less current maturities
Long Term Debt Less Current Maturities Gross
Carrying value of long-term debt, excluding current maturities, before deducting unamortized debt discount or premium and unamortized debt issuance costs.
Unamortized debt discount
Debt Instrument, Unamortized Discount
Unamortized debt issuance costs
Debt Issuance Costs, Noncurrent, Net
Long-term debt
Long-term Debt, Excluding Current Maturities
Maturity date
Debt Instrument, Maturity Date, Description
Revenue from Contract with Customer [Abstract]
Disaggregation of Revenue [Table]
Disaggregation of Revenue [Table]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]
Disaggregation of Revenue [Line Items]
Disaggregation of Revenue [Line Items]
Unsatisfied performance obligations
Revenue, Remaining Performance Obligation, Amount
Extended payment terms granted, minimum period to adjust contract consideration for the time value of money
Minimum Period Of Contract To Adjust Contract Consideration For The Time Value Of Money
Minimum Period Of Contract To Adjust Contract Consideration For The Time Value Of Money
Contract assets
Contract with Customer, Asset, Net
Contract liabilities
Contract with Customer, Liability
Revenue recognized
Contract with Customer, Liability, Revenue Recognized
Deferred contract costs
Capitalized Contract Cost, Net
Amortization of deferred contract costs
Capitalized Contract Cost, Amortization
Schedule of disaggregated revenue
Disaggregation of Revenue [Table Text Block]
Segment Reporting [Abstract]
Summary of financial data by reportable segment
Schedule of Segment Reporting Information, by Segment [Table Text Block]
Summary of intercompany segment revenues
Summary Of Intercompany Segment Revenues [Table Text Block]
Summary Of Intercompany Segment Revenues [Table Text Block]
Schedule of total assets by reportable segment
Reconciliation of Assets from Segment to Consolidated [Table Text Block]
Contract assets (Note 9)
Contract with Customer, Asset, Net, Current
Note receivable
Notes, Loans and Financing Receivable, Net, Current
Prepaids
Other Prepaid Expense, Current
Deferred costs (Note 9)
Deferred Set-up Costs, Current
Other
Other Assets, Miscellaneous, Current
Total other current assets
Other Assets, Current
Reversal in AOCI of previously recorded unrealized gain on note receivable
Other Comprehensive Income (Loss), Securities, Available-for-sale, Adjustment, before Tax
Other than temporary loss on note receivable
Other than Temporary Impairment Losses, Investments, Available-for-sale Securities
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table]
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table]
Antidilutive Securities [Axis]
Antidilutive Securities [Axis]
Antidilutive Securities, Name [Domain]
Antidilutive Securities, Name [Domain]
Convertible Senior Notes Maturing March 2032 (Redeemed May 2018)
Convertible Senior Notes Maturing March 2032 [Member]
Convertible Senior Notes Maturing March 2032 [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 (in shares)
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Employee Benefit Plans
Disclosure of Compensation Related Costs, Share-based Payments [Text Block]
Revenue From Contracts With Customers
Revenue from Contract with Customer [Text Block]
Financial Ratio Range [Axis]
Financial Ratio Range [Axis]
Financial Ratio Range [Axis]
Financial Ratio Range [Domain]
Financial Ratio Range [Domain]
[Domain] for Financial Ratio Range [Axis]
Greater than or equal to 4.00 to 1.00
Consolidated Total Leverage Ratio Greater Than Or Equal To 4.00 [Member]
Consolidated Total Leverage Ratio Greater Than Or Equal To 4.00
Greater than or equal to 3.50 to 1.00 but less than 4.00 to 1.00
Consolidated Total Leverage Ratio Greater Than Or Equal To 3.50 But Less Than 4.00 [Member]
Consolidated Total Leverage Ratio Greater Than Or Equal To 3.50 But Less Than 4.00
Less than 3.50 to 1.00
Consolidated Total Leverage Ratio Less Than 3.50 [Member]
Consolidated Total Leverage Ratio Less Than 3.50
Minimum Cash
Debt Instrument, Covenant, Minimum Cash Amount
Debt Instrument, Covenant, Minimum Cash Amount
Business Segment Information
Segment Reporting Disclosure [Text Block]
Equity Method Investments and Joint Ventures [Abstract]
Schedule of Equity Method Investments [Table]
Schedule of Equity Method Investments [Table]
Investment, Name [Axis]
Investment, Name [Axis]
Equity Method Investee, Name [Domain]
Investment, Name [Domain]
Independence Hub, LLC
Independence Hub Llc [Member]
Independence Hub, LLC [Member]
Schedule of Equity Method Investments [Line Items]
Schedule of Equity Method Investments [Line Items]
Percentage of ownership interest
Equity Method Investment, Ownership Percentage
Water depth
Water Depth
Depth of the water.
Investee losses in excess of investment
Repurchased principal amount
Debt Instrument, Repurchased Face Amount
Repurchase of convertible debt
Payments for fees
Payments for Other Fees
Guarantor obligations (as a percent)
Guarantor Obligations, Liquidation Proceeds, Percentage
Details Of Certain Accounts
Supplemental Balance Sheet Disclosures [Text Block]
Statement Of Cash Flow Information
Cash Flow, Supplemental Disclosures [Text Block]
Commitments and Contingencies Disclosure [Abstract]
Commitments And Contingencies And Other Matters
Commitments and Contingencies Disclosure [Text Block]
Derivative Instruments And Hedging Activities
Derivative Instruments and Hedging Activities Disclosure [Text Block]
Income Tax Disclosure [Abstract]
Income Taxes
Income Tax Disclosure [Text Block]
Net proceeds from debt issuance
Proceeds from Debt, Net of Issuance Costs
Initial conversion ratio
Debt Instrument, Convertible, Conversion Ratio
Initial conversion price per share (in dollars per share)
Debt Instrument, Convertible, Conversion Price
Redemption price as a percentage of principal amount
Debt Instrument, Redemption Price, Percentage of Principal Amount Redeemed
Minimum percentage in aggregate principal amount
Minimum Percentage In Aggregate Principal Amount
Minimum percentage in aggregate principal amount then outstanding holders of the notes are required to have in order to declare the entire principal amount of all the notes, and the interest accrued on such notes, if any, to be immediately due and payable pursuant to customary terms and covenants, including that upon certain events of default occurring and continuing.
Unamortized debt discount
Carrying amount of equity component
Debt Instrument, Convertible, Carrying Amount of Equity Component
Effective interest rate (as a percent)
Debt Instrument, Interest Rate, Effective Percentage
Basis Of Presentation
Basis of Accounting, Policy [Policy Text Block]
Reclassifications
Reclassification, Policy [Policy Text Block]
New Accounting Standards
New Accounting Pronouncements, Policy [Policy Text Block]
Interest paid, net of interest capitalized
Interest Paid, Excluding Capitalized Interest, Operating Activities
Income taxes paid
Income Taxes Paid
Scheduled maturities of long-term debt outstanding
Schedule of Maturities of Long-term Debt [Table Text Block]
Schedule of debt covenants
Schedule of Debt [Table Text Block]
Components of net interest expense
Interest Income and Interest Expense Disclosure [Table Text Block]
Income Statement [Abstract]
Net revenues
Revenue from Contract with Customer, Excluding Assessed Tax
Cost of sales
Cost of Revenue
Gross profit
Gross Profit
Loss on disposition of assets, net
Selling, general and administrative expenses
Selling, General and Administrative Expense
Income (loss) from operations
Operating Income (Loss)
Equity in losses of investment
Income (Loss) from Equity Method Investments
Net interest expense
Interest Income (Expense), Nonoperating, Net
Other income (expense), net
Other Nonoperating Income (Expense)
Other income – oil and gas
Other Income (Expense) Oil And Gas
Amount of nonoperating income (expense) related to oil and gas activities, classified as other.
Income tax provision
Income Tax Expense (Benefit)
Net income (loss)
Earnings (loss) per share of common stock (in dollars per share)
Earnings Per Share, Basic and Diluted [Abstract]
Basic
Earnings Per Share, Basic
Diluted
Earnings Per Share, Diluted
Weighted average common shares outstanding (in shares)
Weighted Average Number of Shares Outstanding, Diluted [Abstract]
Basic
Weighted Average Number of Shares Outstanding, Basic
Diluted
Weighted Average Number of Shares Outstanding, Diluted
Income Statement Location [Domain]
Other Income (Expense), Net
Other Nonoperating Income (Expense) [Member]
Gain (Loss) Recognized in Earnings
Derivative, Gain (Loss) on Derivative, Net
Schedule of differences between U.S. statutory rate and effective rate
Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]
Stockholders' Equity Note [Abstract]
Shareholders' Equity
Stockholders' Equity Note Disclosure [Text Block]
Fair Value Disclosures [Abstract]
Fair Value Measurements, Recurring and Nonrecurring [Table]
Fair Value Measurements, Recurring and Nonrecurring [Table]
Measurement Frequency [Axis]
Measurement Frequency [Axis]
Fair Value, Measurement Frequency [Domain]
Fair Value, Measurement Frequency [Domain]
Fair Value, Measurements, Recurring
Fair Value, Measurements, Recurring [Member]
Fair Value Hierarchy and NAV [Axis]
Fair Value Hierarchy and NAV [Axis]
Fair Value, Measurements, Fair Value Hierarchy [Domain]
Fair Value Hierarchy and NAV [Domain]
Level 1
Fair Value, Inputs, Level 1 [Member]
Level 2
Fair Value, Inputs, Level 2 [Member]
Level 3
Fair Value, Inputs, Level 3 [Member]
Asset Class [Axis]
Asset Class [Axis]
Asset Class [Domain]
Asset Class [Domain]
Note Receivable
Available-for-sale Securities [Member]
Liability Class [Axis]
Liability Class [Axis]
Fair Value by Liability Class [Domain]
Fair Value by Liability Class [Domain]
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]
Assets
Assets, Fair Value Disclosure
Liabilities
Financial and Nonfinancial Liabilities, Fair Value Disclosure
Total net liability
Fair Value, Net Asset (Liability)
Components of Accumulated OCI
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]
Derivative [Table]
Derivative [Table]
Balance Sheet Location [Axis]
Balance Sheet Location [Axis]
Balance Sheet Location [Domain]
Balance Sheet Location [Domain]
Accrued Liabilities
Accrued Liabilities [Member]
Other Liabilities
Other Liabilities [Member]
Derivative [Line Items]
Derivative [Line Items]
Liability derivative instruments not designated as hedging instruments
Derivative Instruments Not Designated as Hedging Instruments, Liability, at Fair Value
September 30, 2018
December 31, 2018 through and including March 31, 2019
Period 3 [Member]
Period 3 [Member]
June 30, 2019 through and including September 30, 2019
Period 4 [Member]
Period 4 [Member]
December 31, 2019
Period 5 [Member]
Period 5 [Member]
March 31, 2020 and each fiscal quarter thereafter
Period 6 [Member]
Period 6 [Member]
Maximum Consolidated Total Leverage Ratio
Maximum Consolidated Total Leverage Ratio
Maximum Ratio of Consolidated Funded Indebtedness to Consolidated EBITDA.
Production Facilities
Production Facilities [Member]
Production Facilities [Member]
Consolidation Items [Axis]
Consolidation Items [Axis]
Consolidation Items [Domain]
Consolidation Items [Domain]
Reportable Segments
Operating Segments [Member]
Corporate and Other
Corporate, Non-Segment [Member]
Total assets
Assets
Total Debt
Loan Notes [Member]
Total Amount of Carrying Value / Fair Value of Long-Term Debt [Member]
Fair value
Long-term Debt, Fair Value
Share-based Awards
Restricted Stock [Member]
Diluted shares (as reported)
Total (in shares)
Weighted Average Number Of Diluted Shares Including Anti-Dilutive Securities
Weighted Average Number Of Diluted Shares Including Anti-dilutive Securities
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Accumulated Other Comprehensive Income (Loss) [Table]
Accumulated Other Comprehensive Income (Loss) [Table]
Financial Instrument [Axis]
Financial Instrument [Axis]
Financial Instruments [Domain]
Financial Instruments [Domain]
Hedges
Derivative [Member]
Equity Components [Axis]
Equity Components [Axis]
Equity Component [Domain]
Equity Component [Domain]
Retained Earnings
Retained Earnings [Member]
Accumulated OCI
AOCI Including Portion Attributable to Noncontrolling Interest [Member]
Adjustments for New Accounting Pronouncements [Axis]
Adjustments for New Accounting Pronouncements [Axis]
Type of Adoption [Domain]
Type of Adoption [Domain]
ASU No. 2018-02
Accounting Standards Update 2018-02 [Member]
Accounting Standards Update 2018-02 [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Cumulative foreign currency translation adjustment
Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Net of Tax
Unrealized loss on hedges, net of tax
Accumulated Other Comprehensive Income (Loss), Cumulative Changes in Net Gain (Loss) from Cash Flow Hedges, Effect Net of Tax
Unrealized gain on note receivable, net of tax
Accumulated Other Comprehensive Income (Loss), Debt Securities, Available-for-sale, Adjustment, after Tax
Accumulated other comprehensive loss
Accumulated Other Comprehensive Income (Loss), Net of Tax
Deferred tax assets
Deferred Tax Assets, Other Comprehensive Loss
Reclassification of stranded tax benefits (losses)
U.S. Tax Cuts And Jobs Act Of 2017 Estimated Impact
Amount of reasonable estimate for income tax benefit (loss) from effect of U.S. Tax Cuts and Jobs Act of 2017 for which accounting for tax effect is incomplete.
Deferred tax liabilities
Deferred Tax Liabilities, Other Comprehensive Income
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]
2005 Incentive Plan
Incentive Plan 2005 [Member]
Incentive Plan 2005 [Member]
Restricted Stock
Performance Share Units
Performance Shares [Member]
Fixed Value Cash Awards
Fixed Value Cash Awards [Member]
Fixed Value Cash Awards
ESPP
Employee Stock [Member]
Scenario [Axis]
Scenario [Axis]
Scenario, Unspecified [Domain]
Scenario, Unspecified [Domain]
Scenario, Adjustment
Scenario, Adjustment [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares available for issuance (in shares)
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant
Share-based compensation
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost
Share-based award liability
Deferred Compensation Share-based Arrangements, Liability, Current and Noncurrent
Cash paid to settle share-based award liability
Deferred Compensation Arrangement with Individual, Distribution Paid
Long-term incentive cash awards granted
Deferred Compensation Arrangement with Individual, Cash Award Granted, Amount
Vesting period
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period
Compensation expense
Deferred Compensation Arrangement with Individual, Compensation Expense
Shares authorized for issuance (in shares)
Deferred Compensation Arrangement with Individual, Shares Authorized for Issuance
Purchase limit per employee (in shares)
Share-based Compensation Arrangement by Share-based Payment Award, Maximum Number of Shares Per Employee
Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table]
Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table]
Other Current Assets
Other Current Assets [Member]
Other Assets, Net
Other Assets [Member]
Other Noncurrent Liabilities
Other Noncurrent Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivatives, Fair Value [Line Items]
Asset derivative instruments designated as hedging instruments
Derivative Instruments in Hedges, Assets, at Fair Value
Liability derivative instruments designated as hedging instruments
Derivative Instruments in Hedges, Liabilities, at Fair Value
Intercompany Elimination
Intersegment Eliminations [Member]
Income (loss) from operations
Schedule of share-based awards granted
Schedule Of Share-Based Awards Granted [Table Text Block]
Schedule Of Share-Based Awards Granted To Executive Officers Management Employees And Non Employee Members Of Board Of Directors Table [Text Block]
Statement of Financial Position [Abstract]
Assets
Assets [Abstract]
Current assets:
Assets, Current [Abstract]
Cash and cash equivalents
Accounts receivable:
Accounts Receivable, Net [Abstract]
Trade, net of allowance for uncollectible accounts of $2,752
Accounts Receivable, Net, Current
Unbilled and other
Unbilled Contracts Receivable
Other current assets
Total current assets
Assets, Current
Property and equipment
Property, Plant and Equipment, Gross
Less accumulated depreciation
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment
Property and equipment, net
Property, Plant and Equipment, Net
Other assets, net
Other Assets, Noncurrent
Total assets
LIABILITIES AND SHAREHOLDERS' EQUITY
Liabilities and Equity [Abstract]
Current liabilities:
Liabilities, Current [Abstract]
Accounts payable
Accounts Payable, Current
Accrued liabilities
Income tax payable
Accrued Income Taxes, Current
Current maturities of long-term debt
Total current liabilities
Liabilities, Current
Long-term debt
Deferred tax liabilities
Deferred Tax Liabilities, Net, Noncurrent
Other non-current liabilities
Total liabilities
Liabilities
Shareholders’ equity:
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest [Abstract]
Common stock, no par, 240,000 shares authorized, 148,107 and 147,740 shares issued, respectively
Common Stock, Value, Issued
Retained earnings
Retained Earnings (Accumulated Deficit)
Accumulated other comprehensive loss
Total shareholders’ equity
Stockholders' Equity Attributable to Parent
Total liabilities and shareholders’ equity
Liabilities and Equity
Schedule of supplemental cash flow information
Schedule of Cash Flow, Supplemental Disclosures [Table Text Block]
Document And Entity Information [Abstract]
Document and Entity Information [Abstract]
Document Type
Document Type
Amendment Flag
Amendment Flag
Document Period End Date
Document Period End Date
Document Fiscal Period Focus
Document Fiscal Period Focus
Document Fiscal Year Focus
Document Fiscal Year Focus
Trading Symbol
Trading Symbol
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
Entity Common Stock, Shares Outstanding
Entity Common Stock, Shares Outstanding
Contract with Customer, Duration [Axis]
Contract with Customer, Duration [Axis]
Contract with Customer, Duration [Domain]
Contract with Customer, Duration [Domain]
Short-term
Short-term Contract with Customer [Member]
Long-term
Long-term Contract with Customer [Member]
Customer [Axis]
Customer [Axis]
Customer [Domain]
Customer [Domain]
Robotics
Intercompany Elimination
Intercompany Elimination [Member]
Intercompany Elimination [Member]
Minimum contract duration to be classified as long-term
Minimum Contract Duration To Be Classified As Long-Term
Minimum contract duration to be classified as long-term. Long-term contract may include multi-year agreements whereby the commitment for services in any one year may be short in duration.
Schedule of other financial instruments measured at fair value on a recurring basis
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]
Schedule of principal amount and estimated fair value of long-term debt
Schedule of Carrying Values and Estimated Fair Values of Debt Instruments [Table Text Block]
Equity-Based Arrangements, Individual Contracts, Type of Deferred Compensation [Axis]
Equity-Based Arrangements, Individual Contracts, Type of Deferred Compensation [Axis]
Type of Deferred Compensation [Domain]
Equity-Based Arrangements, Individual Contracts, Type of Deferred Compensation [Domain]
January 2, 2018 - 33% per year over three years
Grant Share Amount [Member]
Grant Share Amount A [Member]
January 2, 2018 - 100% on January 2, 2021
Grant Share Amount B [Member]
Grant Share Amount B [Member]
January 2, 2018 - 100% on January 1, 2020
Grant Share Amount C [Member]
Grant Share Amount C [Member]
April 2, 2018 - 100% on January 1, 2020
Grant Share Amount D [Member]
Grant Share Amount D [Member]
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Date of Grant
Share Based Compensation Arrangement By Share Based Payment Award Grant Date
Grant date of share-based payment award.
Shares / Units
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period
Grant Date Fair Value Per Share
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value
Vesting Percentage
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage
Vesting Period
Vesting Date
Share Based Compensation Arrangement By Share Based Payment Award Vesting date
Vesting date of share-based payment award.
Note receivable
Notes, Loans and Financing Receivable, Net, Noncurrent
Prepaids
Prepaid Expense, Noncurrent
Deferred dry dock costs, net
Deferred Drydock Expenses, Net
Deferred Drydock Expenses, Net
Deferred costs (Note 9)
Deferred Set-up Costs, Noncurrent
Charter fee deposit
Deposits Assets, Noncurrent
Other
Other Assets, Miscellaneous, Noncurrent
Total other assets, net
Interest expense
Interest Expense
Interest income
Interest Income, Other
Capitalized interest
Interest Costs Capitalized Adjustment
Net interest expense
Statement of Comprehensive Income [Abstract]
Other comprehensive income (loss), net of tax:
Other Comprehensive Income (Loss), Net of Tax [Abstract]
Net unrealized gain (loss) on hedges arising during the period
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax
Reclassifications to net income (loss)
Income taxes on hedges
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Tax
Net change in hedges, net of tax
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax
Unrealized loss on note receivable arising during the period
Income taxes on note receivable
Other Comprehensive Income (Loss), Securities, Available-for-sale, Tax
Unrealized loss on note receivable, net of tax
Other Comprehensive Income (Loss), Securities, Available-for-sale, Adjustment, after Tax
Foreign currency translation gain (loss)
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax
Other comprehensive income (loss), net of tax
Other Comprehensive Income (Loss), Net of Tax
Comprehensive income (loss)
Comprehensive Income (Loss), Net of Tax, Attributable to Parent
Consolidated Interest Coverage Ratio, Period [Axis]
Consolidated Interest Coverage Ratio, Period [Axis]
Consolidated Interest Coverage Ratio, Period [Axis]
Consolidated Interest Coverage Ratio, Period [Domain]
Consolidated Interest Coverage Ratio, Period [Domain]
[Domain] for Consolidated Interest Coverage Ratio, Period [Axis]
June 30, 2018 and each fiscal quarter thereafter
Minimum Consolidated Interest Coverage Ratio
Minimum Consolidated Interest Coverage Ratio
Minimum Ratio of Consolidated EBITDA to Consolidated Interest Charges.
Long-term Debt, Type [Axis]
Long-term Debt, Type [Domain]
Notional amount
Derivative, Notional Amount
Losses in Accumulated OCI to be re-classified within twelve months
Cash Flow Hedge Gain (Loss) to be Reclassified within Twelve Months
Funded amount
Proceeds from Issuance of Secured Debt
Scheduled principal installments
Debt Instrument, Periodic Payment, Principal
Balloon payment
Debt Instrument, Periodic Payment Terms, Balloon Payment to be Paid
Fixed LIBOR rate on interest rate swaps (as a percent)
Derivative, Basis Spread on Variable Rate
Earnings Per Share
Earnings Per Share [Text Block]
Fair Value Measurements
Fair Value Disclosures [Text Block]
U.S. statutory rate
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent
Effective tax rate
Effective Income Tax Rate Reconciliation, Percent
Basic:
Earnings Per Share, Basic, Two Class Method [Abstract]
Less: Undistributed earnings allocated to participating securities
Undistributed Earnings (Loss) Allocated to Participating Securities, Basic
Undistributed earnings allocated to common shares
Undistributed Earnings, Basic
Weighted average number of shares outstanding, basic (in shares)
Diluted:
Earnings Per Share, Diluted, Two Class Method [Abstract]
Effect of dilutive securities:
Incremental Weighted Average Shares Attributable to Dilutive Effect [Abstract]
Undistributed earnings reallocated to participating securities
Undistributed Earnings (Loss) Allocated to Participating Securities, Diluted
Net income, diluted
Net Income (Loss) Attributable to Parent, Diluted
Share-based awards other than participating securities (in shares)
Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements
Weighted average number of shares outstanding, diluted (in shares)
Commitments And Contingencies [Table]
Commitments And Contingencies [Table]
Commitments And Contingencies [Table]
Property, Plant and Equipment, Type [Axis]
Property, Plant and Equipment, Type [Axis]
Property, Plant and Equipment, Type [Domain]
Property, Plant and Equipment, Type [Domain]
Q7000
Q7000 [Member]
Q7000 [Member]
Counterparty Name [Axis]
Counterparty Name [Axis]
Counterparty Name [Domain]
Counterparty Name [Domain]
Shipyard
Shipyard [Member]
Shipyard [Member]
Payment Terms [Axis]
Payment Terms [Axis]
Payment Terms
Payment Terms [Domain]
Payment Terms [Domain]
Payment Terms
Contract Signing
Contract Signing [Member]
Contract Signing
Due 2016
Due 2016 [Member]
Payment due in 2016
Due December 2017
Due December 2017 [Member]
Payment due in December 2017
Due December 31, 2018
Due December 31, 2018 [Member]
Payment due on December 31, 2018
Vessel Delivery
Vessel Delivery [Member]
Vessel Delivery
Commitments And Contingencies [Line Items]
Commitments And Contingencies [Line Items]
Commitments And Contingencies [Line Items]
Percentage of contract price
Long Term Purchase Commitment Percentage
The percentage due of the amount the entity agreed to spend under the long-term purchase commitment.
Total investment
Revenue, Initial Application Period Cumulative Effect Transition [Table]
Revenue, Initial Application Period Cumulative Effect Transition [Table]
Initial Application Period Cumulative Effect Transition [Axis]
Initial Application Period Cumulative Effect Transition [Axis]
Initial Application Period Cumulative Effect Transition [Domain]
Initial Application Period Cumulative Effect Transition [Domain]
Pro Forma Without Adoption of ASC 606
Calculated under Revenue Guidance in Effect before Topic 606 [Member]
Effect of Change
Difference between Revenue Guidance in Effect before and after Topic 606 [Member]
ASC 606
Accounting Standards Update 2014-09 [Member]
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Balance Sheet
Unbilled and other
Other current assets
Liabilities
Liabilities [Abstract]
Accrued liabilities
Deferred tax liabilities
Equity
Retained earnings
Statement of Operations
Income from operations
Net income
Reclassification of net stranded tax benefits
Unrealized Gain (Loss) Recognized in OCI (Effective Portion)
Equity Investments
Equity Method Investments and Joint Ventures Disclosure [Text Block]
Effective Income Tax Rate Reconciliation, Percent [Abstract]
Effective Income Tax Rate Reconciliation, Percent [Abstract]
Foreign provision
Effective Income Tax Rate Reconciliation, Foreign Income Tax Rate Differential, Percent
Change in tax position
Effective Income Tax Rate Reconciliation, Tax Credit, Foreign, Percent
Other
Effective Income Tax Rate Reconciliation, Other Adjustments, Percent
Effective rate
Tax charge related to change in tax position on foreign taxes
Effective Income Tax Rate Reconciliation, Tax Credit, Foreign, Amount
Maximum Consolidated Net Leverage Ratio
Maximum Consolidated Net Leverage Ratio
Maximum Ratio of Consolidated Net Indebtedness to Consolidated EBITDA.
Allowance for uncollectible accounts
Allowance for Doubtful Accounts Receivable, Current
Common stock, shares authorized
Common Stock, Shares Authorized
Common stock, shares issued
Common Stock, Shares, Issued