Basis of Presentation and General Information (Policies)	3 Months Ended
Mar. 31, 2023
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Accounting	The accompanying condensed consolidated financial statements have been prepared in accordance with generally accepted accounting principles in the United States (“U.S. GAAP”), and the rules and regulations of the SEC that apply to interim financial statements and with the instructions to Form 10-Q and Rule 10-01 of Regulation S-X. Accordingly, they do not include all of the information and notes normally included in consolidated financial statements prepared in conformity with U.S. GAAP. They should be read in conjunction with the consolidated financial statements and notes thereto included in the Company’s 2022 Annual Report on Form 10-K, filed with the SEC on March 10, 2023 (the “Annual Report”).
Use of Estimates	The preparation of condensed consolidated financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the condensed consolidated financial statements and the reported amounts of revenues and expenses during the reporting period. Significant estimates include fair values of long-lived assets (primarily vessels and operating lease right-of-use assets), impairment of long-lived assets (primarily vessels and operating lease right-of-use assets), stock-based compensation and financial instruments (primarily derivative instruments and Convertible Bond Debt (as defined herein)), residual values of vessels, useful lives of vessels and estimated losses on accounts receivable. Actual results could differ from those estimates.
Recently Adopted Accounting Pronouncements and Recently Issued Accounting Pronouncements Not Yet Effective	Recently Adopted Accounting PronouncementsIn March 2020, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2020-04, Facilitation of the Effects of Reference Rate Reform on Financial Reporting (“ASU 2020-04”). ASU 2020-04 provides optional expedients and exceptions for applying U.S. GAAP to contracts, hedging relationships and other transactions that reference LIBOR or another reference rate expected to be discontinued because of reference rate reform. ASU 2020-04 establishes (1) a general contract modification principle that entities can apply in other areas that may be affected by reference rate reform and (2) certain elective hedge accounting expedients. ASU 2020-04 is optional and effective for all entities as of March 12, 2020 and may be applied prospectively to contract modifications made on or before December 31, 2024 (as extended by ASU 2022-06, Deferral of the Sunset Date of Topic 848). In January 2021, the FASB issued ASU 2021-01, Reference Rate Reform (Topic 848), Scope (“ASU 2021-01”), which clarifies certain provisions in Topic 848, if elected by an entity, to apply to derivative instruments that use interest rates for margining, discounting, or contract price alignment that is modified as a result of reference rate reform. The Company has not yet modified any contracts under the expedients or exceptions allowed by ASU 2020-04 or ASU 2021-01. If and when a contract modification within the scope of ASU 2020-04 occurs, it is not expected to have a material impact on our condensed consolidated financial statements.
Fair Value Measurements	Cash, cash equivalents and restricted cash—Carrying values reported in the Condensed Consolidated Balance Sheets approximate fair value due to their highly liquid and short-term nature. Collateral on derivatives—Carrying values reported in the Condensed Consolidated Balance Sheets approximate fair value due to their short-term nature. Derivative assets and liabilities—The fair values of derivative assets and liabilities, which include interest rate swaps, FFAs and bunker swaps, are estimated using observable inputs for similar instruments as of the measurement date and standard valuation techniques to convert future amounts to a single present amount assuming that participants are motivated, but not compelled to transact. Long-term Debt—The fair value of Convertible Bond Debt, which is traded in the over-the-counter market, is estimated based on quoted prices in markets that are not active on identical instruments. The carrying amount of the Term Facility under the Global Ultraco Debt Facility approximates its fair value, due to its variable interest rates. The carrying values of other financial assets and liabilities (primarily accounts receivable, accounts payable and other accrued expenses) approximate their fair value due to their relative short-term nature. The Company defines fair value, establishes a framework for measuring fair value and provides disclosures about fair value measurements. The fair value hierarchy for disclosure of fair value measurements is as follows: •Level 1 – Quoted prices in active markets for identical assets or liabilities. •Level 2 – Quoted prices for similar assets and liabilities in active markets, quoted prices for identical assets and liabilities in markets that are not active or other observable inputs. •Level 3 – Inputs that are unobservable.

Basis of Presentation and General Information (Policies)

3 Months Ended

Mar. 31, 2023

Organization, Consolidation and Presentation of Financial Statements [Abstract]

The accompanying condensed consolidated financial statements have been prepared in accordance with generally accepted accounting principles in the United States (“U.S. GAAP”), and the rules and regulations of the SEC that apply to interim financial statements and with the instructions to Form 10-Q and Rule 10-01 of Regulation S-X. Accordingly, they do not include all of the information and notes normally included in consolidated financial statements prepared in conformity with U.S. GAAP. They should be read in conjunction with the consolidated financial statements and notes thereto included in the Company’s 2022 Annual Report on Form 10-K, filed with the SEC on March 10, 2023 (the “Annual Report”).

Use of Estimates

The preparation of condensed consolidated financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the condensed consolidated financial statements and the reported amounts of revenues and expenses during the reporting period. Significant estimates include fair values of long-lived assets (primarily vessels and operating lease right-of-use assets), impairment of long-lived assets (primarily vessels and operating lease right-of-use assets), stock-based compensation and financial instruments (primarily derivative instruments and Convertible Bond Debt (as defined herein)), residual values of vessels, useful lives of vessels and estimated losses on accounts receivable. Actual results could differ from those estimates.

Recently Adopted Accounting Pronouncements and Recently Issued Accounting Pronouncements Not Yet Effective

Recently Adopted Accounting PronouncementsIn March 2020, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2020-04, Facilitation of the Effects of Reference Rate Reform on Financial Reporting (“ASU 2020-04”). ASU 2020-04 provides optional expedients and exceptions for applying U.S. GAAP to contracts, hedging relationships and other transactions that reference LIBOR or another reference rate expected to be discontinued because of reference rate reform. ASU 2020-04 establishes (1) a general contract modification principle that entities can apply in other areas that may be affected by reference rate reform and (2) certain elective hedge accounting expedients. ASU 2020-04 is optional and effective for all entities as of March 12, 2020 and may be applied prospectively to contract modifications made on or before December 31, 2024 (as extended by ASU 2022-06, Deferral of the Sunset Date of Topic 848). In January 2021, the FASB issued ASU 2021-01, Reference Rate Reform (Topic 848), Scope (“ASU 2021-01”), which clarifies certain provisions in Topic 848, if elected by an entity, to apply to derivative instruments that use interest rates for margining, discounting, or contract price alignment that is modified as a result of reference rate reform. The Company has not yet modified any contracts under the expedients or exceptions allowed by ASU 2020-04 or ASU 2021-01. If and when a contract modification within the scope of ASU 2020-04 occurs, it is not expected to have a material impact on our condensed consolidated financial statements.

Fair Value Measurements

Cash, cash equivalents and restricted cash—Carrying values reported in the Condensed Consolidated Balance Sheets approximate fair value due to their highly liquid and short-term nature.

Collateral on derivatives—Carrying values reported in the Condensed Consolidated Balance Sheets approximate fair value due to their short-term nature.

Derivative assets and liabilities—The fair values of derivative assets and liabilities, which include interest rate swaps, FFAs and bunker swaps, are estimated using observable inputs for similar instruments as of the measurement date and standard valuation techniques to convert future amounts to a single present amount assuming that participants are motivated, but not compelled to transact.

Long-term Debt—The fair value of Convertible Bond Debt, which is traded in the over-the-counter market, is estimated based on quoted prices in markets that are not active on identical instruments. The carrying amount of the Term Facility under the Global Ultraco Debt Facility approximates its fair value, due to its variable interest rates.

The carrying values of other financial assets and liabilities (primarily accounts receivable, accounts payable and other accrued expenses) approximate their fair value due to their relative short-term nature.

The Company defines fair value, establishes a framework for measuring fair value and provides disclosures about fair value measurements. The fair value hierarchy for disclosure of fair value measurements is as follows:

•Level 1 – Quoted prices in active markets for identical assets or liabilities.

•Level 2 – Quoted prices for similar assets and liabilities in active markets, quoted prices for identical assets and liabilities in markets that are not active or other observable inputs.

•Level 3 – Inputs that are unobservable.