Number of Carrier Newbuildings

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- Definition

Working Capital Surplus (Deficit)

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Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt, classified as current. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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-Topic 210
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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Amount of cash inflow (outflow) from operating activities, including discontinued operations. Operating activity cash flows include transactions, adjustments, and changes in value not defined as investing or financing activities.

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-Publisher FASB
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The cash outflow from construction costs to date on capital projects that have not been completed and assets being constructed that are not ready to be placed into service.

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Commitments and Contingencies - Additional Information - Presentation of Financial Statements (Details) $ in Thousands	1 Months Ended	6 Months Ended		36 Months Ended
	Jul. 31, 2017 newbuilding	Jun. 30, 2018 USD ($)	Jun. 30, 2017 USD ($)	Dec. 31, 2020 USD ($)	Dec. 31, 2017 USD ($)
Loss Contingencies [Line Items]
Net operating cash flow		$ 77,055	$ 190,564
Working capital deficit		318,000
Current portion of long-term debt		$ 473,691			$ 589,767
Number of newbuildings \| newbuilding	4
Scenario, Forecast [Member]
Loss Contingencies [Line Items]
Payments for Construction in Process				$ 577,000