Global Ship Lease (GSL) 6-K 6 Aug 21 2021 Q2 Current report (foreign) Financial data

Cover

Cover	6 Months Ended
	Jun. 30, 2021
Cover [Abstract]
Document Type	6-K
Amendment Flag	false
Document Period End Date	Jun. 30, 2021
Document Fiscal Period Focus	Q2
Document Fiscal Year Focus	2021
Current Fiscal Year End Date	--12-31
Entity File Number	001-34153
Entity Registrant Name	Global Ship Lease, Inc.
Entity Central Index Key	0001430725
Entity Address, Address Line One	c/o 25 Wilton Road
Entity Address, City or Town	London SW1V 1LW
Entity Address, Country	GB

Interim Unaudited Condensed Con

Interim Unaudited Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
CURRENT ASSETS
Cash and cash equivalents	$ 142,963	$ 80,757
Restricted cash	17,465	825
Accounts receivable, net	2,872	2,532
Inventories	6,455	6,316
Prepaid expenses and other current assets	12,004	6,711
Due from related parties	2,007	1,472
Total current assets	183,766	98,613
NON - CURRENT ASSETS
Vessels in operation	1,212,642	1,140,583
Advances for vessels acquisitions and other additions	27,645	1,364
Deferred charges, net	23,605	22,951
Restricted cash, net of current portion	5,076	10,680
Total non - current assets	1,268,968	1,175,578
TOTAL ASSETS	1,452,734	1,274,191
CURRENT LIABILITIES
Accounts payable	10,806	10,557
Accrued liabilities	16,116	19,127
Current portion of long - term debt	95,312	76,681
Deferred revenue	6,243	5,623
Due to related parties	312	225
Total current liabilities	128,789	112,213
LONG - TERM LIABILITIES
Long - term debt, net of current portion and deferred financing costs	726,008	692,775
Intangible liabilities - charter agreements	4,571	4,462
Total non - current liabilities	730,579	697,237
Total liabilities	859,368	809,450
Commitments and Contingencies	0	0
SHAREHOLDERS' EQUITY
Additional paid in capital	689,921	586,355
Accumulated deficit	(96,917)	(121,794)
Total shareholders' equity	593,366	464,741
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	1,452,734	1,274,191
Common Class A [Member]
SHAREHOLDERS' EQUITY
Common Stock, Value, Outstanding	362	177
Series B Preferred Stock [Member]
SHAREHOLDERS' EQUITY
Preferred Stock, Value, Outstanding	0	0
Series C Preferred Stock [Member]
SHAREHOLDERS' EQUITY
Preferred Stock, Value, Outstanding	$ 0	$ 3

Interim Unaudited Condensed C_2

Interim Unaudited Condensed Consolidated Balance Sheets (Parenthetical) - $ / shares	Jun. 30, 2021	Dec. 31, 2020
Common Class A [Member]
Common Stock, Shares Authorized	214,000,000	214,000,000
Common Stock, Par or Stated Value Per Share	$ 0.01	$ 0.01
Common Stock, Shares, Issued	36,283,468	17,741,008
Common Stock, Shares, Outstanding	36,283,468	17,741,008
Series B Preferred Stock [Member]
Preferred Stock, Shares Authorized	44,000	44,000
Preferred Stock, Par or Stated Value Per Share	$ 0.01	$ 0.01
Preferred Stock, Shares Issued	36,772	22,822
Preferred Stock, Shares Outstanding	36,772	22,822
Series C Preferred Stock [Member]
Preferred Stock, Shares Authorized	250,000	250,000
Preferred Stock, Par or Stated Value Per Share	$ 0.01	$ 0.01
Preferred Stock, Shares Issued	0	250,000
Preferred Stock, Shares Outstanding	0	250,000

Interim Unaudited Condensed C_3

Interim Unaudited Condensed Consolidated Statements of Operations - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
OPERATING REVENUES
Time charter revenues (include related party revenues of 66,005 and $74,524 for each of the periods ended June 30, 2021 and 2020, respectively)	$ 155,851	$ 142,323
OPERATING EXPENSES
Vessels operating expenses (include related party vessels operating expenses of $6,868 and $6,105 for each of the periods ended June 30, 2021 and 2020, respectively)	52,406	49,682
Time charter and voyage expenses (include related party time charter and voyage expenses of $1,470 and $1,201 for each of the periods ended June 30, 2021 and 2020, respectively)	3,889	6,181
Depreciation and amortization	25,519	23,126
Impairment of vessels	0	8,497
General and administrative expenses	6,131	4,759
Gain on sale of vessel	(7,770)	0
Operating Income	75,676	50,078
NON-OPERATING INCOME/(EXPENSES)
Interest income	364	831
Interest and other finance expenses (include of $5,764 and $2,271 Notes premium for each of the six months ended June 30, 2021 and 2020, respectively)	(39,254)	(35,539)
Other income, net	933	(351)
Total non-operating expenses	(37,957)	(35,059)
Income before income taxes	37,719	15,019
Income taxes	0	(3)
Net Income	37,719	15,016
Earnings allocated to Series B Preferred Shares	(3,495)	(1,790)
Net Income available to Common Shareholders	$ 34,224	$ 13,226
Common Class A [Member]
Net Earnings per Class A common share
Basic	34,136,307	17,632,674
Diluted	34,168,093	17,730,628
Basic	$ 1	$ 0.43
Diluted	$ 1	$ 0.43

Interim Unaudited Condensed C_4

Interim Unaudited Condensed Consolidated Statements of Operations (Parenthetical) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
Income Statement [Abstract]
Revenue from Related Parties	$ 66,005	$ 74,524
Costs and Expenses, Related Party	6,868	6,105
Time charter and voyage expenses-related parties	$ 1,470	$ 1,201

Interim Unaudited Condensed C_5

Interim Unaudited Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended		12 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020
Cash flows from operating activities:
Net Income	$ 37,719	$ 15,016
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	25,519	23,126
Impairment of vessels	0	8,497
Gain on sale of vessel	(7,770)	0
Amortization of deferred financing costs	5,363	1,921
Amortization of original issue discount/premium on repurchase of notes	7,136	2,282
Amortization of intangible liabilities/assets - charter agreements	(2,461)	355
Share based compensation	1,854	1,282
Changes in operating assets and liabilities:
(Increase)/decrease in accounts receivable and other assets	(5,633)	182
Increase in inventories	(139)	(476)
Decrease in accounts payable and other liabilities	(3,148)	(5,154)
Decrease in related parties' balances, net	(447)	(3,460)
Increase/(decrease) in deferred revenue	620	(4,968)
Unrealized foreign exchange loss	0	1
Net cash provided by operating activities	58,613	38,604
Cash flows from investing activities:
Acquisition of vessels and intangibles	(98,400)	(23,060)
Cash paid for vessel expenditures	(2,233)	(1,385)
Advances for vessel acquisitions and other additions	(25,957)	(1,279)
Cash paid for drydockings	(4,181)	(7,189)
Net proceeds from sale of vessels	16,514	4,119
Net cash used in investing activities	(114,257)	(28,794)
Cash flows from financing activities:
Proceeds from issuance of 2024 Notes	22,702	19,193
Repurchase of 2022 Notes, including premium	(239,183)	(57,822)
Proceeds from drawdown of credit facilities	461,805	47,000
Repayment of credit facilities	(53,838)	(33,912)
Repayment of refinanced debt	(143,799)	(44,366)
Deferred financing costs paid	(7,916)	(969)
Proceeds from offering of Class A common shares, net of offering costs	67,612	(76)
Proceeds from offering of Series B preferred shares, net of offering costs	34,345	4,982
Class A common shares - dividend paid	(9,347)	0
Series B Preferred Shares - dividend paid	(3,495)	(1,790)
Net cash provided by/(used in) financing activities	128,886	(67,760)
Net increase/(decrease) in cash and cash equivalents and restricted cash	73,242	(57,950)
Cash and cash equivalents and restricted cash at beginning of the period	92,262	147,636	$ 147,636
Cash and cash equivalents and restricted cash at end of the period	165,504	89,686	$ 92,262
Supplementary Cash Flow Information:
Cash paid for interest	24,547	33,098
Non-cash investing activities:
Unpaid drydocking expenses	1,890	482
Unpaid vessel expenditures	3,474	2,823
Non-cash financing activities:
Unpaid offering costs	63	0
Unpaid deferred financing costs	$ 406	$ 0

Interim Unaudited Condensed C_6

Interim Unaudited Condensed Consolidated Statements of Changes in Shareholders' Equity (Parenthetical) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Jun. 30, 2021	Dec. 31, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019
Series B Preferred Stock [Member]
Preferred Stock, Par or Stated Value Per Share	$ 0.01	$ 0.01	$ 0.01	$ 0.01	$ 0.01	$ 0.01
Series C Preferred Stock [Member]
Preferred Stock, Par or Stated Value Per Share	$ 0.01	$ 0.01	$ 0.01	0.01	0.01	0.01
Common Stock [Member]
Common Stock, Par or Stated Value Per Share				$ 0.01	$ 0.01	$ 0.01
Conversion of Series C Preferred shares to Class A common shares (Note 7)	$ 130

Interim Unaudited Condensed C_7

Interim Unaudited Condensed Consolidated Statements of Changes in Shareholders' Equity - USD ($) $ in Thousands	Common Stock [Member]	Preferred Stock [Member]Series B Preferred Stock [Member]	Preferred Stock [Member]Series C Preferred Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Total
Beginning balance, value at Dec. 31, 2019	$ 175	$ 0	$ 3	$ 565,586	$ (159,362)	$ 406,402
Shares, Outstanding, Beginning Balance at Dec. 31, 2019	17,556,738	14,428	250,000
Issuance of Restricted Stock Units (Note 8)	$ 0	$ 0	$ 0	429	0	429
Issuance of Class A common shares, net of offering costs	0	0	0	(39)	0	(39)
Net Income for the period	0	0	0	0	1,500	1,500
Series B Preferred Shares dividend (Note 7)	0	0	0	0	(879)	(879)
Issuance of Series B Preferred Shares, net of offering costs (Note 7)	0	$ 0	0	4,003	0	4,003
Series C Preferred Shares issued (Note 7), shares		1,646
Ending balance, value at Mar. 31, 2020	$ 175	$ 0	$ 3	569,979	(158,741)	411,416
Shares, Outstanding, Ending Balance at Mar. 31, 2020	17,556,738	16,074	250,000
Share-based Compensation Arrangement by Share-based Payment Award, Shares Issued in Period	45,313
Issuance of Restricted Stock Units (Note 8)	$ 0	$ 0	$ 0	853	0	853
Issuance of Class A common shares, net of offering costs	2	0	0	(37)	0	(35)
Net Income for the period	0	0	0	0	13,516	13,516
Series B Preferred Shares dividend (Note 7)	0	0	0	0	(911)	(911)
Issuance of Series B Preferred Shares, net of offering costs (Note 7)	$ 0	$ 0	0	1,179	0	1,179
Series C Preferred Shares issued (Note 7), shares		581
Stock Issued During Period, Shares, New Issues	184,270
Ending balance, value at Jun. 30, 2020	$ 177	$ 0	$ 3	571,974	(146,136)	426,018
Shares, Outstanding, Ending Balance at Jun. 30, 2020	17,741,008	16,655	250,000
Beginning balance, value at Dec. 31, 2020	$ 177	$ 0	$ 3	586,355	(121,794)	464,741
Shares, Outstanding, Beginning Balance at Dec. 31, 2020	17,741,008	22,822	250,000
Issuance of Restricted Stock Units (Note 8)	$ 0	$ 0	$ 0	1,704	0	1,704
Issuance of Class A common shares, net of offering costs	55	0	0	67,703	0	67,758
Conversion of Series C Preferred shares to Class A common shares (Note 7)	$ 130	0	$ (3)	(127)	0	0
Conversion of Stock, Shares Converted			(250,000)
Conversion of Stock, Shares Issued	12,955,188
Net Income for the period	$ 0	0	$ 0	0	5,643	5,643
Series B Preferred Shares dividend (Note 7)	0	0	0	0	(1,484)	(1,484)
Issuance of Series B Preferred Shares, net of offering costs (Note 7)	$ 0	$ 0	0	10,696	0	10,696
Series C Preferred Shares issued (Note 7), shares		4,356
Stock Issued During Period, Shares, New Issues	5,541,959
Ending balance, value at Mar. 31, 2021	$ 362	$ 0	0	666,331	(117,635)	549,058
Shares, Outstanding, Ending Balance at Mar. 31, 2021	36,283,468	27,178
Issuance of Restricted Stock Units (Note 8)	$ 0	$ 0	0	150	0	150
Issuance of Class A common shares, net of offering costs	0	0	0	(209)	0	(209)
Net Income for the period	0	0	0	0	32,076	32,076
Series B Preferred Shares dividend (Note 7)	0	0	0	0	(2,011)	(2,011)
Issuance of Series B Preferred Shares, net of offering costs (Note 7)	0	$ 0	0	23,649	0	23,649
Series C Preferred Shares issued (Note 7), shares		9,594
Class A common shares dividend	0	$ 0	0		(9,347)	(9,347)
Ending balance, value at Jun. 30, 2021	$ 362	$ 0	$ 0	$ 689,921	$ (96,917)	$ 593,366
Shares, Outstanding, Ending Balance at Jun. 30, 2021	36,283,468	36,772

Description of Business

Description of Business	6 Months Ended
	Jun. 30, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Description of Business	1. Description of Business On August 14, 2008, Global Ship Lease, Inc. (the “Company”) merged indirectly with Marathon Acquisition Corp., a company then listed on The American Stock Exchange, and with the pre-existing Global Ship Lease, Inc. GSL Holdings, Inc. was the surviving entity (the “Marathon Merger”), changed its name to Global Ship Lease, Inc. and became listed on The New York Stock Exchange (the “NYSE”). On November 15, 2018, the Company completed a transformative transaction and acquired Poseidon Containers’ 20 one 19 The Company’s business is to own and charter out containerships to leading liner companies. On June 30, 2021, the Company sold one 2001 2,272 17 third and fourth quarter 2021 The following table provides information about the 48 vessels owned as at June 30, 2021. Description of Business - Schedule of Vessels (Table) Company Name (1) Fleet Country of Incorporation Vessel Name Capacity in TEUs (2) Year Built Earliest Charter Expiry Date Global Ship Lease 54 LLC GSL Liberia CMA CGM Thalassa 11,040 2008 4Q25 Laertis Marine LLC Poseidon Marshall Islands UASC Al Khor 9,115 2015 1Q22 Penelope Marine LLC Poseidon Marshall Islands Maira XL 9,115 2015 2Q22 Telemachus Marine LLC (3) Poseidon Marshall Islands Anthea Y 9,115 2015 3Q23 Global Ship Lease 53 LLC GSL Liberia MSC Tianjin 8,603 2005 2Q24 Global Ship Lease 52 LLC GSL Liberia MSC Qingdao 8,603 2004 2Q24 Global Ship Lease 43 LLC GSL Liberia GSL Ningbo 8,603 2004 1Q23 Global Ship Lease 30 Limited — Marshall Islands GSL Eleni 7,847 2004 3Q24 (4) Global Ship Lease 31 Limited — Marshall Islands GSL Kalliopi 7,847 2004 4Q22 (4) Global Ship Lease 32 Limited — Marshall Islands GSL Grania 7,847 2004 4Q22 (4) Alexander Marine LLC Poseidon Marshall Islands Mary 6,927 2013 3Q23 Hector Marine LLC Poseidon Marshall Islands Kristina 6,927 2013 2Q24 Ikaros Marine LLC Poseidon Marshall Islands Katherine 6,927 2013 1Q24 Philippos Marine LLC Poseidon Marshall Islands Alexandra 6,927 2013 1Q24 Aristoteles Marine LLC Poseidon Marshall Islands Alexis 6,882 2015 1Q24 Menelaos Marine LLC Poseidon Marshall Islands Olivia I 6,882 2015 1Q24 Global Ship Lease 48 LLC GSL Liberia CMA CGM Berlioz 6,621 2001 4Q25 Leonidas Marine LLC Poseidon Marshall Islands Agios Dimitrios 6,572 2011 4Q23 Global Ship Lease 35 LLC — Liberia GSL Nicoletta 6,840 2002 3Q24 (6) Global Ship Lease 36 LLC — Liberia GSL Christen 6,840 2002 3Q23 (5) Global Ship Lease 33 LLC — Liberia GSL Vinia 6,080 2004 3Q24 Global Ship Lease 34 LLC — Liberia GSL Christel Elisabeth 6,080 2004 2Q24 GSL Arcadia LLC Seven Vessels Liberia GSL Arcadia 6,008 2000 2Q24 GSL Melita LLC Seven Vessels Liberia tbr GSL Melita (8) 6,008 2001 2Q24 GSL Maria LLC Seven Vessels Liberia tbr GSL Maria (8) 6,008 2001 3Q24 GSL Violetta LLC (3) Seven Vessels Liberia GSL Violetta 6,008 2000 4Q24 GSL Tegea LLC Seven Vessels Liberia GSL Tegea 6,008 2001 2Q24 GSL Dorothea LLC Seven Vessels Liberia tbr GSL Dorothea (8) 6,008 2001 2Q24 Tasman Marine LLC Poseidon Marshall Islands Tasman 5,936 2000 1Q22 Hudson Marine LLC Poseidon Marshall Islands Zim Europe 5,936 2000 1Q24 (7) Drake Marine LLC Poseidon Marshall Islands Ian H 5,936 2000 2Q24 (7) Hephaestus Marine LLC Poseidon Marshall Islands Dolphin II 5,095 2007 1Q22 Zeus One Marine LLC Poseidon Marshall Islands Orca I 5,095 2006 2Q24 (9) Global Ship Lease 47 LLC GSL Liberia GSL Château d’If 5,089 2007 4Q26 (10) GSL Alcazar Inc. GSL Marshall Islands CMA CGM Alcazar 5,089 2007 3Q26 (10) Global Ship Lease 50 LLC GSL Liberia CMA CGM Jamaica 4,298 2006 3Q22 Global Ship Lease 49 LLC GSL Liberia CMA CGM Sambhar 4,045 2006 3Q22 Global Ship Lease 51 LLC GSL Liberia CMA CGM America 4,045 2006 3Q22 Global Ship Lease 42 LLC GSL Liberia GSL Valerie 2,824 2005 3Q21 Pericles Marine LLC Poseidon Marshall Islands Athena 2,762 2003 2Q24 (11) Aris Marine LLC Poseidon Marshall Islands Maira 2,506 2000 1Q23 Aphrodite Marine LLC Poseidon Marshall Islands Nikolas 2,506 2000 1Q23 Athena Marine LLC Poseidon Marshall Islands Newyorker 2,506 2001 1Q24 Global Ship Lease 38 LLC GSL Liberia Manet 2,272 2001 4Q21 Global Ship Lease 40 LLC GSL Liberia Keta 2,207 2003 3Q21 Global Ship Lease 41 LLC GSL Liberia Julie 2,207 2002 1Q23 (12) Global Ship Lease 45 LLC GSL Liberia Kumasi 2,207 2002 3Q21 Global Ship Lease 44 LLC GSL Liberia Marie Delmas 2,207 2002 3Q21 (1) All subsidiaries are 100% owned, either directly or indirectly; (2) Twenty-foot Equivalent Units; (3) Currently, vessel-operating company under a sale and leaseback transaction. (4) GSL Eleni delivered 2Q2019 and is chartered for five years; GSL Kalliopi (delivered 4Q2019) and GSL Grania (delivered 3Q2019) are chartered for three years plus two successive periods of one year at the option of the charterer; (5) GSL Christen commenced a charter with Maersk in July 2020 for 2 – 10 months, at charterer’s option. In 2Q21 the charter was extended, in direct continuation, for 27—30 months; (6) GSL Nicoletta commenced a charter with MSC in July 2020; upon conclusion of that charter in 3Q2021, GSL Nicoletta will be chartered to Maersk for 36—40 months; (7) A package agreement with ZIM, for direct charter extensions on two 5,900 TEU ships: Ian H from May 2021 and Zim Europe (formerly Dimitris Y) from May 2022.On April 9, 2021, Dimiris Y has been renamed to Zim Europe; (8)“tbr” means “to be renamed”; (9) Orca I. Chartered to Maersk 2Q2021, at which time the charter was extended in direct continuation for 36—39 months; thereafter Maersk has the option to charter the vessel for a further 12-14 months; (10) CMA CGM Alcazar and GSL Chateau d’If. Both ships have been forward fixed for five years with the new charters due to commence in 4Q2021; (11) Athena was chartered to MSC to 2Q2021, at which time the vessel was drydocked. Thereafter Athena was fixed on charter to Hapag-Lloyd for 35—37 months; (12) Julie. Chartered to 2Q2021 with Sea Consortium; thereafter extended in direct continuation to 1Q2023 (earliest). 1. Description of Business (continued) In February 2021, the Company contracted to purchase seven 6,000 20 years 116,000 36 months In June 2021, the Company contracted to purchase 12 11 years 233,890 July 15, 2021 and 29, 2021 During June 2021, the Company also contracted to purchase four 5,470 11 years 148,000 three years With these additions and following the sale of La Tour on June 30, 2021, the Company’s fleet will comprise 65 The following table provides further information about the 17 ships, which the Company had contacted to purchase as at June 30, 2021 and which have been delivered or are expected to be delivered during the third and fourth quarter of 2021: Description of Business - Schedule of new contractual vessels (Table) Vessel Name (1) Capacity in TEUs Lightweight (tons) Year Built Charterer tbr GSL MYNY 6,008 24,873 2000 Maersk tbr GSL Tripoli 5,470 22,259 2009 Maersk tbr GSL Kithira 5,470 22,108 2009 Maersk tbr GSL Tinos 5,470 22,067 2010 Maersk tbr GSL Syros 5,470 22,098 2010 Maersk tbr GSL Susan 4,363 17,309 2008 CMA CGM tbr GSL Rossi 3,421 16,309 2012 Gold Star tbr GSL Alice 3,421 16,209 2014 CMA CGM tbr GSL Eleftheria 3,405 16,209 2013 Maersk tbr GSL Melina 3,400 16,209 2013 Maersk tbr Matson Molokai 2,824 12,032 2007 Matson tbr GSL Lalo 2,824 11,951 2006 ONE tbr GSL Mercer 2,824 11,970 2007 Hapag Lloyd tbr GSL Elizabeth 2,742 11,507 2006 ONE tbr GSL Chloe 2,546 12,212 2012 ONE tbr GSL Maren 2,546 12,212 2014 Westwood tbr GSL Amstel 1,118 5,167 2008 CMA CGM (1) To be renamed “tbr”.

Summary of Significant Accounti

Summary of Significant Accounting Policies and Disclosures	6 Months Ended
	Jun. 30, 2021
Accounting Policies [Abstract]
Summary of Significant Accounting Policies and Disclosures	2. Summary of Significant Accounting Policies and Disclosures (a) Basis of Presentation The accompanying financial information is unaudited and reflects all adjustments, consisting solely of normal recurring adjustments, which, in the opinion of management, are necessary for a fair statement of financial position and results of operations for the periods presented. The financial information does not include all disclosures required under United States Generally Accepted Accounting Principles (“US GAAP”) for annual financial statements. These interim unaudited condensed consolidated financial statements should be read in conjunction with the Company’s consolidated financial statements as of December 31, 2020 filed with the Securities and Exchange Commission on March 19, 2021 in the Company’s Annual Report on Form 20-F. COVID-19 Pandemic On March 11, 2020, the World Health Organization declared the novel coronavirus (“COVID-19”) outbreak a pandemic. Since the beginning of calendar year 2020, the outbreak of COVID-19 pandemic has resulted in the implementation of numerous actions taken by governments and governmental agencies in an attempt to mitigate the spread of the virus, including, among others, business closures, quarantines, travel restrictions, and physical distancing requirements. These actions have caused substantial disruptions in the global economy and the shipping industry, as well as significant volatility in the financial markets, the severity and duration of which remains uncertain. While the Company cannot predict the long-term economic impact of the COVID-19 pandemic, it will continue to actively monitor the situation and may take further actions altering the Company’s business operations that it determines are in the best interests of its employees, customers, partners, suppliers, and stakeholders, or as required by authorities in the jurisdictions where the Company operates. As a result, many of the Company’s estimates and assumptions required increased judgment and carry a higher degree of variability and volatility. The ultimate effects that any such alterations or modifications may have on the Company’s business are not clear, including any potential negative effects on its business operations and financial results. (b) Principles of Consolidation The accompanying interim unaudited condensed consolidated financial information include the financial statements of the Company and its wholly owned subsidiaries; the Company has no other interests. All significant intercompany balances and transactions have been eliminated in the Company’s interim unaudited condensed consolidated financial statements. (c) Use of estimates The preparation of interim unaudited 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 interim unaudited condensed consolidated financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates under different assumptions and/or conditions. (d) Vessels in operation Vessels are generally recorded at their historical cost, which consists of the acquisition price and any material expenses incurred upon acquisition. Vessels acquired in a corporate transaction accounted for as an asset acquisition are stated at the acquisition price, which consists of consideration paid, plus transaction costs less any negative goodwill, if applicable. Vessels acquired in a corporate transaction accounted for as a business combination are recorded at fair value. Vessels acquired as part of the Marathon Merger in 2008 were accounted for under ASC 805, which required that the vessels be recorded at fair value, less the negative goodwill arising as a result of the accounting for the merger. Subsequent expenditures for major improvements and upgrades are capitalized, provided they appreciably extend the life, increase the earnings capacity or improve the efficiency or safety of the vessels. Borrowing costs incurred during the construction of vessels or as part of the prefinancing of the acquisition of vessels are capitalized. There was no Vessels are stated less accumulated depreciation and impairment, if applicable. Vessels are depreciated to their estimated residual value using the straight-line 30 years Management estimates the residual values of the Company’s container vessels based on a scrap value cost of steel times the weight of the vessel noted in lightweight tons (LWT). Residual values are periodically reviewed and revised to recognize changes in conditions, new regulations or other reasons. Revision of residual values affect the depreciable amount of the vessels and affects depreciation expense in the period of the revision and future periods. Management estimated the residual values of its vessels based on scrap rate of $ 400 For any vessel group which is impaired, the impairment charge is recorded against the cost of the vessel and the accumulated depreciation as at the date of impairment is removed from the accounts. The cost and related accumulated depreciation of assets retired or sold are removed from the accounts at the time of sale or retirement and any gain or loss is included in the interim unaudited condensed Consolidated Statements of Operations. (e) Assets Held for Sale The Company classifies assets and disposal groups as being held for sale when the following criteria are met: management has committed to a plan to sell the asset (disposal group); the asset (disposal group) is available for immediate sale in its present condition; an active program to locate a buyer and other actions required to complete the plan to sell the asset (disposal group) have been initiated; the sale of the asset (disposal group) is probable, and transfer of the asset (disposal group) is expected to qualify for recognition as a completed sale within one year; the asset (disposal group) is being actively marketed for sale at a price that is reasonable in relation to its current fair value; and actions required to complete the plan indicate that it is unlikely that significant changes to the plan will be made or that the plan will be withdrawn. Long-lived assets or disposal groups classified as held for sale are measured at the lower of their carrying amount or fair value less cost to sell. These assets are not depreciated once they meet the criteria to be held for sale. As of June 30, 2021, and December 31, 2020, there were no 2. Summary of Significant Accounting Policies and Disclosures (continued) (f) Impairment of Long-lived assets Tangible fixed assets, such as vessels, that are held and used or to be disposed of by the Company are reviewed for impairment when events or changes in circumstances indicate that their carrying amounts may not be recoverable. In these circumstances, the Company performs step one of the impairment test by comparing the undiscounted projected net operating cash flows for each vessel group to its carrying value. A vessel group comprises the vessel, the unamortized portion of deferred drydocking related to the vessel and the related carrying value of the intangible asset or liability (if any) with respect to the time charter attached to the vessel at its purchase. If the undiscounted projected net operating cash flows of the vessel group are less than its carrying amount, management proceeds to step two of the impairment assessment by comparing the vessel group’s carrying amount to its fair value, including any applicable charter, and an impairment loss is recorded equal to the difference between the vessel group’s carrying value and fair value. Fair value is determined with the assistance from valuations obtained from third party independent ship brokers. The Company uses a number of assumptions in projecting its undiscounted net operating cash flows analysis including, among others, (i) revenue assumptions for charter rates on expiry of existing charters, which are based on forecast charter rates, where relevant, in the four years from the date of the impairment test and a reversion to the historical mean of time charter rates for each vessel thereafter Revenue assumptions are based on contracted charter rates up to the end of the existing contract of each vessel, and thereafter, estimated time charter rates for the remaining life of the vessel. The estimated time charter rate used for non-contracted revenue days of each vessel is considered a significant assumption. Recognizing that the container shipping industry is cyclical and subject to significant volatility based on factors beyond the Company’s control, management believes that using forecast charter rates in the four years from the date of the impairment assessment and a reversion to the historical mean of time charter rates thereafter, represents a reasonable benchmark for the estimated time charter rates for the non-contracted revenue days, and takes into account the volatility and cyclicality of the market. Two 7,585 912 During the six months ended June 30, 2021, there were no events or changes in circumstances which indicated that the carrying amounts of the Company’s other vessels may not be recoverable. Accordingly, no impairment test was performed. (g) Revenue recognition and related expense The Company charters out its vessels on time charters which involves placing a vessel at a charterer’s disposal for a specified period of time during which the charterer uses the vessel in return for the payment of a specified daily hire rate. Such charters are accounted for as operating leases and therefore revenue is recognized on a straight-line basis as the average revenues over the rental periods of such charter agreements, as service is performed. Cash received in excess of earned revenue is recorded as deferred revenue. If a time charter contains one or more consecutive option periods, then subject to the options being exercisable solely by the Company, the time charter revenue will be recognized on a straight-line basis over the total remaining life of the time charter, including any options which are more likely than not to be exercised. Any difference between the charter rate invoiced and the time charter revenue recognized is classified as, or released from, deferred revenue within the interim unaudited condensed Consolidated Balance Sheets. Revenues are recorded net of address commissions, which represent a discount provided directly to the charterer based on a fixed percentage of the agreed upon charter rate. Charter revenue received in advance which relates to the period after a balance sheet date is recorded as deferred revenue within current liabilities until the respective charter services are rendered. Under time charter arrangements the Company, as owner, is responsible for all the operating expenses of the vessels, such as crew costs, insurance, repairs and maintenance, and such costs are expensed as incurred and are included in vessel operating expenses. Commission paid to brokers to facilitate the agreement of a new charter are included in time charter and voyage expenses as are certain expenses related to a voyage, such as the costs of bunker fuel consumed when a vessel is off-hire or idle. Leases: Leases where the Company acts as the lessor are classified as either operating or sales-type / direct financing leases. In cases of lease agreements where the Company acts as the lessor under an operating lease, the Company keeps the underlying asset on the consolidated balance sheets and continues to depreciate the assets over its useful life. In cases of lease agreements where the Company acts as the lessor under a sales-type / direct financing lease, the Company derecognizes the underlying asset and records a net investment in the lease. The Company acts as a lessor under operating leases in connection with all of its charter out – bareboat-out arrangements. In cases of sale and leaseback transactions, if the transfer of the asset to the lessor does not qualify as a sale, then the transaction constitutes a failed sale and leaseback and is accounted for as a financial liability. For a sale to have occurred, the control of the asset would need to be transferred to the lessor, and the lessor would need to obtain substantially all the benefits from the use of the asset. The Company has entered into two agreements which qualify as failed sale and leaseback transactions as the Company is required to repurchase the vessels at the end of the lease term and the Company has accounted for the two agreements as financing transactions. The Company elected the practical expedient which allows the Company to treat the lease and non-lease components as a single lease component for the leases where the timing and pattern of transfer for the nonlease component and the associated lease component to the lessees are the same and the lease component, if accounted for separately, would be classified as an operating lease. The combined component is therefore accounted for as an operating lease under ASC 842, as the lease components are the predominant characteristics, in 2020 and 2019. The Company adopted the new “Leases” standard (Topic 842) on January 1, 2019 using the modified retrospective method. The Company elected the practical expedient to use the effective date of adoption as the date of initial application. Furthermore the Company elected practical expedients, which allow entities (i) to not reassess whether any expired or existing contracts are considered or contain leases; (ii) to not reassess the lease classification for any expired or existing leases (iii) to not reassess initial direct costs for any existing leases and (iv) which allows to treat the lease and non-lease components as a single lease component due to its predominant characteristic. The adoption of this standard did not have a material effect on the interim unaudited condensed consolidated financial statements since the Company is primarily a lessor and the accounting for lessors is largely unchanged under this standard. 2. Summary of Significant Accounting Policies and Disclosures (continued) (h) Fair Value Measurement and Financial Instruments Financial instruments carried on the balance sheet include cash and cash equivalents, restricted cash, trade receivables and payables, other receivables and other liabilities and long-term debt. The particular recognition methods applicable to each class of financial instrument are disclosed in the applicable significant policy description of each item or included below as applicable. Fair value measurement: Level 1 - Level 2 - Level 3 - As at March 31, 2020, two of the Company’s vessel groups that were held and used with a total aggregate carrying amount of $ 15,585 8,000 7,585 8,008 7,096 912 8,497 Financial Risk Management: Credit risk: Financial instruments that potentially subject the Company to concentrations of credit risk are accounts receivable and cash and cash equivalents. The Company does not believe its exposure to credit risk is likely to have a material adverse effect on its financial position, results of operations or cash flows. Liquidity Risk: 2. Summary of Significant Accounting Policies and Disclosures (continued) (i) Recent accounting pronouncements The Company does not believe that any recently issued, but not yet effective, accounting pronouncements would have a material impact on its interim unaudited condensed consolidated financial statements.

Vessels in Operation

Vessels in Operation	6 Months Ended
	Jun. 30, 2021
Property, Plant and Equipment [Abstract]
Vessels in Operation	3. Vessels in Operation Vessels in Operation - Schedule of Vessels in Operation, Less Accumulated Depreciation (Table) Vessel Cost, as adjusted for Impairment charges Accumulated Depreciation Net Book Value As of January 1, 2020 $ 1,306,936 $ (151,350) $ 1,155,586 Additions 41,710 — 41,710 Disposals (7,058) — (7,058) Depreciation — (41,158) (41,158) Impairment loss (43,803) 35,306 (8,497) As of December 31, 2020 $ 1,297,785 $ (157,202) $ 1,140,583 Additions 102,226 — 102,226 Disposals (23,167) 14,445 (8,722) Depreciation — (21,445) (21,445) As of June 30, 2021 $ 1,376,844 $ (164,202) $ 1,212,642 On June 30, 2021, the Company sold La Tour for net proceeds of $ 16,514 7,770 On May 25, 2021 2001 6,008 15,500 On May 17, 2021 2001 6,008 15,500 On April 28, 2021 2000 2001 6,008 17,300 16,600 On April 26, 2021 2000 2001 6,008 18,000 15,500 On July 20, 2020, the Company sold Utrillo for net proceeds of $ 3,411 On July 3, 2020, the Company sold GSL Matisse for net proceeds of $ 3,441 On February 21, 2020 2002 6,840 12,660 On January 29, 2020 2002 6,840 13,000 3. Vessels in Operation (continued) Impairment During the three months ended March 31, 2020, the Company determined that the vessels Utrillo and GSL Matisse should be divested. As of March 31, 2020, the Company had an expectation that the vessels would each be sold before the end of their estimated useful life, and as a result an impairment test of each of the specific asset groups was performed, recognizing an impairment loss of $ 7,585 38 912 8,497 The Company has evaluated the impact of current economic situation on the recoverability of all its other vessel groups and has determined that there were no events or changes in circumstances which indicated that their carrying amounts may not be recoverable. Accordingly, there was no triggering event during the six months ended June 30, 2021. Collateral As of June 30, 2021, following the sale of La Tour, 20 28 Advances for vessel acquisitions and other additions On February 9, 2021, the Company announced that it has agreed to purchase Seven Vessels for an aggregate purchase price of $ 116,000 233,890 25,817 As of June 30, 2021, and December 31, 2020, the Company had other vessel additions mainly for ballast water treatments and totaling $ 1,828 1,364

Long-Term Debt

Long-Term Debt	6 Months Ended
	Jun. 30, 2021
Debt Disclosure [Abstract]
Long-Term Debt	4. Long-Term Debt Long-Term Debt - Schedule of Long-Term Debt (Table) Facilities June 30, 2021 December 31, 2020 Deutsche Credit Facility (a) $ 51,670 $ — HCOB Credit Facility (b) 53,500 — CACIB, Bank Sinopac, CTBC Credit Facility (c) 51,700 — New Hayfin Credit Facility (d) 217,249 — Chailease Credit Facility (e) 6,660 7,596 2024 Notes (f) 82,521 59,819 Syndicated Senior Secured Credit Facility (CACIB, ABN, CIT, Siemens, CTBC, Bank Sinopac, Palatine) (g) 225,600 238,000 Blue Ocean Junior Credit Facility (g, h) 26,205 38,500 Hellenic Bank Credit Facility (i) 45,700 49,700 Deutsche, CIT, HCOB, Entrust, Blue Ocean Credit Facility (j) — 149,055 Hayfin Credit Facility (k) 5,833 5,833 $ 766,638 $ 548,503 2022 Notes 233,436 322,723 Less redemptions and repurchases (233,436) (89,287) 2022 Notes (l) $ — $ 233,436 Total credit facilities $ 766,638 $ 781,939 Sale and Leaseback Agreement CMBFL – $54,000 (m) 54,000 — Sale and Leaseback Agreement – Neptune $14,735 (n) 14,735 — Total Sale and Leaseback Agreements $ 68,735 $ — Total borrowings $ 835,373 $ 781,939 Less: Current portion of 2022 Notes (l) — (26,240) Less: Current portion of long-term debt (84,037) (50,441) Less: Current portion of Sale and Leaseback Agreements (m, n) (11,275) — Less: Original issue discount of 2022 Notes (l) — -1,333 (1,133) Less: Original issue premium/(discount) of 2024 Notes (f) 109 -147 (147) Less: Deferred financing costs (p) (14,162) (11,203) Non-current portion of Long-Term Debt $ 726,008 $ 692,775 a) $51.7 Million Deutsche Bank AG Credit Facility On May 6, 2021 51,670 $ June 30, 2022 48,527 The new Facility is repayable in 20 quarterly 1,162.45 28,421 This facility bears interest at LIBOR plus a margin 3.25 As of June 30, 2021, the outstanding balance of this facility was $ 51,670 4. Long-Term Debt (continued) b) $64.2 Million Hamburg Commercial Bank AG Credit Facility On April 15, 2021 64,200 Seven 53,500 Each Tranche of the Facility is repayable in 16 quarterly 668.75 This facility bears interest at LIBOR plus a margin 3.50 As of June 30, 2021, the outstanding balance of this facility was $ 53,500 c) $51.7 Million CACIB, Bank Sinopac, CTBC Credit Facility On April 13, 2021 51,700 $ June 30, 2022 48,648 The Lenders are Credit Agricole Corporate and Investment Bank (“CACIB”), Bank Sinopac Co. Ltd. (“Bank Sinopac”) and CTBC Bank Co. Ltd. (“CTBC”). The Facility is repayable in 20 quarterly 1,275 26,200 This facility bears interest at LIBOR plus a margin 2.75 As of June 30, 2021, the outstanding balance of this facility was $ 51,700 d) $236.2 Million Senior secured loan facility with Hayfin Capital Management, LLP On January 7, 2021 236,200 LIBOR plus a margin 7.00 twenty quarterly 6,560 5,831 As of June 30, 2021, the outstanding balance of this facility was $ 217,249 e) $9.0 Million Chailease Credit Facility On February 26, 2020 9,000 The Facility is repayable in 36 consecutive monthly 156 monthly 86 1,314 This facility bears interest at LIBOR plus a margin 4.20 As of June 30, 2021, the outstanding balance of this facility was $ 6,660 4. Long-Term Debt (continued) f) 8.00% Senior Unsecured Notes due 2024 On November 19, 2019 27,500 8.00 December 31, 2024 4,125 Interest on the 2024 Notes is payable on the last day of February, May, August and November of each year February 29, 2020 The Company has the option to redeem the 2024 Notes for cash, in whole or in part, at any time (i) on or after December 31, 2021 and prior to December 31, 2022, at a price equal to 102 101 100 On November 27, 2019, the Company entered into an “At Market Issuance Sales Agreement” with B. Riley FBR, Inc. (the “Agent”) under which and in accordance with the Company’s instructions, the Agent may offer and sell from time to time newly issued 2024 Notes. As of June 30, 2021, the outstanding aggregate principal amount of the 2024 notes was $ 82,521 50,895 82,630 g) $268.0 Million Syndicated Senior Secured Credit Facility (CACIB, ABN, CIT, Siemens, CTBC, Bank Sinopac, Palatine) On September 19, 2019 December 2020 224,310 The Senior Syndicated Secured Credit Facility was agreed to be borrowed in two Tranche A amounting to $ 230,000 20 quarterly 5,200 December 12, 2019 126,000 September 24, 2024 Tranche B amounts to $ 38,000 20 quarterly 1,000 18,000 September 24, 2024 The interest rate is LIBOR plus a margin of 3.00 As of June 30, 2021, the outstanding balance of this facility was $ 225,600 h) $38.5 Million Blue Ocean Junior Credit Facility On September 19, 2019 38,500 The Company fully drew down the facility on September 23, 2019 and it is scheduled to be repaid in a single instalment on the termination date which falls on September 24, 2024 This facility bears interest at 10.00 During the six month period ended June 30, 2021, the Company using a portion of the net proceeds from the at-the-market issuance programs prepaid an amount of $ 12,295 1,617 26,205 4. Long-Term Debt (continued) i) $59.0 Million Hellenic Bank Credit Facility On May 23, 2019 37,000 An initial tranche of $ 13,000 20 quarterly 450 4,000 A second tranche of $ 12,000 20 quarterly 400 4,000 The third tranche of $ 12,000 20 quarterly 400 4,000 On December 10, 2019 22,000 two Both tranches were drawn on December 10, 2019 and are each repayable in 20 quarterly 375 3,500 This facility bears interest at LIBOR plus a margin 3.90 As of June 30, 2021, the outstanding balance of this facility was $ 45,700 j) $180.5 Million Deutsche, CIT, HCOB, Entrust, Blue Ocean Credit Facility In connection with the Poseidon Transaction, the Company assumed debt from the three vessel owning companies of UASC Al Khor, Maira XL and Anthea Y on the date of completion of the transaction of $ 180,500 November 9, 2018 180,500 June 30, 2022 On December 31, 2018, the Company entered a deed of amendment and restatement with the bank. Based on this restatement there was a re-tranche of the existing facility such that it was split into a senior facility in an amount of $ 141,900 38,600 June 30, 2022 1.10:1 4. Long-Term Debt (continued) $180.5 Million Deutsche, CIT, HCOB, Entrust, Blue Ocean Credit Facility (continued) Senior Facility The Senior Facility was comprised of three 14 868 35,148 14 863 35,218 14 858 35,288 The Senior Facility bore interest at LIBOR 3.00 quarterly On April 13, 2021 May 6, 2021 51,700 51,670 $ May 20, 2021 54,000 $ June 30, 2022 As of June 30, 2021, the outstanding balance of the Senior Facility was fully repaid. Junior Facility The Junior Facility was comprised of three Tranches. Tranche A related to Al Khor and was repayable in 14 236 9,563 14 235 9,577 14 233 9,604 The Junior Facility bore interest at LIBOR 10.00 quarterly Following the refinancing that took place in April and May 2021, as described above, as of June 30, 2021, the outstanding balance of the Junior Facility was fully repaid. k) $65.0 Million Hayfin Credit Facility On September 7, 2018 65,000 July 16, 2022 LIBOR plus a margin 5.5 each quarter end date 2.0 8,125 As of June 30, 2021, the outstanding balance of this facility was $ 5,833 l) 9.875% First Priority Secured Notes due 2022 On October 31, 2017 360,000 9.875 November 15, 2022 356,400 January 2021 Interest on the 2022 Notes was payable semi-annually on May 15 and November 15 of each year 16 16 On February 10, 2020, the Company completed an optional redemption of $ 46,000 48,271 104.938 15,287 98.98 On January 20, 2021, the Company optionally redeemed, in full, $ 233,436 239,200 102.469 10,642 m) $54.0 Million Sale and Leaseback agreement - CMBFL On May 20, 2021 54,000 June 30, 2022 The sale and leaseback agreement will be repayable in eight 2,025 20 891 19,980 The sale and leaseback agreement matures in May 2028 LIBOR plus a margin 3.25 In May 2021, on the actual delivery date of the vessel, the Company drew $ 54,000 54,000 4. Long-Term Debt (continued) n) $14.7 Million Sale and Leaseback agreement – Neptune Maritime Leasing On May 12, 2021 14,735 April 2021 The sale and leaseback agreement will be repayable in 15 793.87 and four 469.12 950 The sale and leaseback agreement matures in February 2026 LIBOR plus a margin 4.64 In May 2021, the Company drew $ 14,735 As of June 30, 2021, the outstanding balance of this sale and leaseback agreement was $ 14,735 o) Repayment Schedule Maturities of long-term debt subsequent to June 30, 2021 are as follows: Long-Term Debt - Repayment schedule (Table) Payment due by period ended Amount June 30, 2022 $ 95,312 June 30, 2023 100,936 June 30, 2024 93,939 June 30, 2025 335,495 June 30, 2026 and thereafter 209,691 $ 835,373 p) Deferred Financing Costs Long-Term Debt - Schedule of Deferred Financing Costs (Table) June 30, 2021 December 31, 2020 Opening balance $ 11,203 $ 14,095 Expenditure in the period 8,322 1,193 Amortization included within interest expense (5,363) (4,085) Closing balance $ 14,162 $ 11,203 During 2021, total costs amounting $ 413 4,049 777 963 191 945 During 2020, total costs amounting $ 776 67 320 30 4. Long-Term Debt (continued) q) Debt covenants-securities Amounts drawn under the facilities listed above are secured by first priority mortgages on certain of the Company’s vessels and other collateral. The credit facilities contain a number of restrictive covenants that limit the Company from, among other things: incurring or guaranteeing indebtedness; charging, pledging or encumbering the vessels; and changing the flag, class, management or ownership of the vessel owning entities. The credit facilities also require the vessels to comply with the ISM Code and ISPS Code and to maintain valid safety management certificates and documents of compliance at all times. Additionally, specific credit facilities require compliance with a number of financial covenants including asset cover ratios and minimum liquidity and corporate guarantor requirements. Among other events, it will be an event of default under the credit facilities if the financial covenants are not complied with, or remedied. As of June 30, 2021, and December 31, 2020, the Company was in compliance with its debt covenants.

Related Party Transactions

Related Party Transactions	6 Months Ended
	Jun. 30, 2021
Related Party Transactions [Abstract]
Related Party Transactions	5. Related Party Transactions CMA CGM CMA CGM is presented as a related party due to the fact that as of June 30, 2021 and December 31, 2020, it was a shareholder, owning Class A common shares representing 8.4 11.13 Time Charter Agreements A number of the Company’s time charter arrangements are with CMA CGM, a significant source of the Company’s operating revenues, representing 42% of gross revenues in six months ended June 30, 2021, and consequently the Company is dependent on the performance by CMA CGM of its obligations under these charters, which operate in an industry that is subject to volatility. Under these time charters, hire is payable in advance and the daily rate is fixed for the duration of the charter. Revenues generated from charters to CMA CGM are disclosed separately in the interim unaudited condensed Consolidated Statements of Operations. The outstanding receivables due from CMA CGM are presented in the interim unaudited condensed Consolidated Balance Sheets under "Due from related parties" totaling $ 1,098 2,118 5. Related Party Transactions (continued) Ship Management Agreements Technomar Shipping Inc. (“Technomar”) is presented as a related party, as the Company’s Executive Chairman is a significant shareholder. The Company has currently ship management agreement with Technomar for all fleet under which the ship manager is responsible for all day-to-day ship management, including crewing, purchasing stores, lubricating oils and spare parts, paying wages, pensions and insurance for the crew, and organizing other ship operating necessities, including the arrangement and management of dry-docking. As of June 30, 2021, and 2020, the management of the Company’s fleet was performed solely by Technomar. The management fees charged to the Company by Technomar for the six months ended June 30, 2021 amounted to $ 6,868 6,105 no 899 10 184 10 no Conchart Commercial Inc. (“Conchart”) provides commercial management services to the Company and is presented as a related party, as the Company’s Executive Chairman is the sole beneficial owner. Under the management agreements, Conchart, is responsible for (i) marketing of the Company’s vessels, (ii) seeking and negotiating employment of the Company’s vessels, (iii) advise the Company on market developments, developments of new rules and regulations, (iv) assisting in calculation of hires, freights, demurrage and/or dispatch monies and collection any sums related to the operation of vessels, (v) communicating with agents, and (vi) negotiating sale and purchase transactions. For the 19 vessels of Poseidon Fleet, the agreements were effective from the date of the completion of the Poseidon Transaction; for the GSL Fleet, till refinance of 2022 Notes which took place on January 2021 an EBSA agreement was in place that was terminated and replaced with commercial management agreements also same agreements applied to seven vessels up to June 30, 2021; for all new acquired vessels during 2019 and 2020, the agreements were effective upon acquisition. The fees charged to the Company by Conchart for the six months ended June 30, 2021 amounted to $ 1,470 1,201 Any outstanding fees due to Conchart are presented in the interim unaudited condensed Consolidated Balance Sheets under "Due to related parties" totaling to $ 312 225

Commitments and Contingencies

Commitments and Contingencies	6 Months Ended
	Jun. 30, 2021
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	6. Commitments and Contingencies Charter Hire Receivable The Company has entered time charters for its vessels. The charter hire is fixed for the duration of the charter. The minimum contracted future charter hire receivable, net of address commissions, not allowing for any unscheduled off-hire, assuming expiry at earliest possible dates and assuming options callable by the Company included in the charters are not exercised, for the 48 vessels as at June 30, 2021 is as follows: Commitments and Contingencies - Charter Hire Receivable (Table) Period ending Amount June 30, 2022 $ 347,628 June 30, 2023 290,993 June 30, 2024 210,411 June 30, 2025 62,282 Thereafter 41,267 Total minimum lease revenue, net of address commissions $ 952,581

Share Capital

Share Capital	6 Months Ended
	Jun. 30, 2021
Equity [Abstract]
Share Capital	7. Share Capital Common shares As of June 30, 2021, the Company had one class of common shares. 1 On January 12, 2021, the Company announced that Board of Directors approved the initiation of a quarterly cash dividend of $ 0.12 Restricted stock units or incentive stock units have been granted periodically to the Directors and management, under the Company’s Equity Incentive Plans, as part of their compensation arrangements (see note 8). In April 2020, 184,270 45,313 On January 20, 2021, upon the redemption in full of the 2022 Notes, KEP VI (Newco Marine) Ltd. and KIA VIII (Newco Marine) Ltd. (together, “Kelso”), both affiliates of Kelso & Company, a U.S. private equity firm, exercised their right to convert an aggregate of 250,000 12,955,188 On January 26, 2021, the Company completed its underwritten public offering of 5,400,000 13.00 70,200 141,959 67,758 36,283,468 On April 13, 2021, Kelso and Maas Capital Investments B.V. sold an aggregate of 5,175,000 12.50 During the six months ended June 30, 2021, the Board of Directors approved additional awards of 61,625 1,421,000 On May 10, 2021, the Company declared a dividend of $ 0.25 June 3, 2021 May 24, 2021 9,347 Preferred shares On December 10, 2019, the Company entered into At Market Issuance Sales Agreement with B. Riley FBR under which the Company may, from time to time, issue additional depositary shares, each of which represents 1/100th of one share of the Company’s Series B Preferred Shares (the “Depositary Share ATM Program”). Pursuant to the Depositary Share ATM Program, in 2019, the Company issued 42,756 428 856 839,442 8,394 18,847 1,395,005 1,395 34,400 36,772 On August 20, 2014, the Company issued 1,400,000 33,497 8.75 At any time after August 20, 2019 (or within 180 days after the occurrence of a fundamental change), the Series B Preferred Shares may be redeemed, at the discretion of the Company, in whole or in part, at a redemption price of $ 2,500 25.00 7. Share Capital (continued) These shares are classified as Equity in the interim unaudited condensed Consolidated Balance Sheets. The dividends payable on the Series B Preferred Shares are presented as a reduction of Retained Earnings in the interim unaudited condensed Consolidated Statements of Shareholders’ Equity, when and if declared by the Board of Directors. An initial dividend was declared on September 22, 2014 for the third quarter 2014. Subsequent dividends have been declared for all quarters.

Share-Based Compensation

Share-Based Compensation	6 Months Ended
	Jun. 30, 2021
Share-based Payment Arrangement [Abstract]
Share-Based Compensation	8. Share-Based Compensation On February 4, 2019, the 2019 Plan was adopted. The 2019 Plan is administered by the Compensation Committee of the Board. The maximum aggregate number of Class A common shares that may be delivered pursuant to awards granted under the 2019 Plan during its 10-year term is 1,812,500 12,500 100,000 4 10 years In July 2019, the Compensation Committee of the Board of Directors approved stock-based awards to senior management under the Company’s 2019 Omnibus Incentive Plan (the “2019 Plan”). A total of 1,421,000 four 61,625 8.00 11.00 14.00 60 day 113,279 317,188 931,320 184,270 45,313 1,361,787 229,583 Share based awards since January 1, 2020, are summarized as follows: Share-Based Compensation - Summary of Share, Based Awards (Table) Restricted Stock Units Number of Units Number Weighted Average Fair Value on Grant Date Actual Fair Value on Vesting Date Unvested as at January 1, 2020 1,246,096 $ 3.79 n/a Vested in 2020 (317,188) — 4.45 Unvested as at December 31, 2020 928,908 $ 3.79 n/a Granted on March 11, 2021 61,625 11.72 n/a Vested in six months ended June 30, 2021 (931,320) n/a 3.83 Unvested as at June 30, 2021 59,213 $ 5.08 n/a Using the graded vesting method of expensing the incentive shares grants, the weighted average fair value of the stock units is recognized as compensation costs in the interim unaudited condensed Consolidated Statements of Operations over the vesting period. The fair value of the incentive share grants for this purpose is calculated by multiplying the number of stock units by the fair value of the shares at the grant date. The Company has not factored any anticipated forfeiture into these calculations based on the limited number of participants. For the six months ended June 30, 2021 and 2020, the Company recognized a total of $ 1,854 1,282

Earnings per Share

Earnings per Share	6 Months Ended
	Jun. 30, 2021
Earnings Per Share [Abstract]
Earnings per Share	9. Earnings per Share Under the two-class method, net income, if any, is first reduced by the amount of dividends declared in respect of common shares for the current period, if any, and the remaining earnings are allocated to common shares and participating securities to the extent that each security can share the earnings assuming all earnings for the period are distributed. The net income allocated to Class A and Series C shares was based on an as converted basis utilizing the two-class method. Earnings are only allocated to participating securities in a period of net income if, based on the contractual terms, the relevant common shareholders have an obligation to participate in such earnings. As a result, earnings are only be allocated to the Class A common shareholders and Series C preferred shareholders. At June 30, 2021, there were 59,213 985,549 Earnings per Share (Table) Six months ended June 30, 2021 2020 Numerator: Net income attributable to common shareholders $ 34,224 $ 13,226 Undistributed income attributable to Series C participating preferred shares — (5,602) Net income available to common shareholders, basic and diluted $ 34,224 $ 7,624 Net income available to: Class A, basic and diluted 34,224 7,624 Denominator: Class A Common shares Basic weighted average number of common shares outstanding 34,136,307 17,632,674 Plus weighted average number of RSUs with service conditions 31,786 97,954 Common share and common share equivalents, dilutive 34,168,093 17,730,628 Basic earnings per share: Class A 1.00 0.43 Diluted earnings per share: Class A 1.00 0.43 Series C Preferred Shares-basic and diluted earnings per share: Undistributed income attributable to Series C participating preferred shares $ — $ 5,602 Basic weighted average number of Series C Preferred shares outstanding, as converted — 12,955,188 Plus weighted average number of RSUs with service conditions — 71,970 Dilutive weighted average number of Series C Preferred shares outstanding, as converted — 13,027,157 Basic earnings per share n/a 0.43 Diluted earnings per share n/a 0.43

Subsequent events

Subsequent events	6 Months Ended
	Jun. 30, 2021
Subsequent Events [Abstract]
Subsequent events	10. Subsequent events After the period end and up to August 4, 2021, the Company issued and sold an aggregate of 257,709 6,400 On August 5, 2021 the Company declared a dividend of $ 0.25 September 3, 2021 August 23, 2021 On July 28, 2021 116,000 64,200 In connection with the acquisition by the Company (see note 1) of the Twelve Vessels for an aggregate purchase price of $ 233,890 July 15, 2021 and 29, 2021 140,000 In connection with the acquisition by the Company (see note 1) of the Four Vessels for an aggregate purchase price of $ 148,000 during the third and fourth quarter of 2021 14,800

Summary of Significant Accoun_2

Summary of Significant Accounting Policies and Disclosures (Policies)	6 Months Ended
	Jun. 30, 2021
Accounting Policies [Abstract]
Basis of Presentation	(a) Basis of Presentation The accompanying financial information is unaudited and reflects all adjustments, consisting solely of normal recurring adjustments, which, in the opinion of management, are necessary for a fair statement of financial position and results of operations for the periods presented. The financial information does not include all disclosures required under United States Generally Accepted Accounting Principles (“US GAAP”) for annual financial statements. These interim unaudited condensed consolidated financial statements should be read in conjunction with the Company’s consolidated financial statements as of December 31, 2020 filed with the Securities and Exchange Commission on March 19, 2021 in the Company’s Annual Report on Form 20-F. COVID-19 Pandemic On March 11, 2020, the World Health Organization declared the novel coronavirus (“COVID-19”) outbreak a pandemic. Since the beginning of calendar year 2020, the outbreak of COVID-19 pandemic has resulted in the implementation of numerous actions taken by governments and governmental agencies in an attempt to mitigate the spread of the virus, including, among others, business closures, quarantines, travel restrictions, and physical distancing requirements. These actions have caused substantial disruptions in the global economy and the shipping industry, as well as significant volatility in the financial markets, the severity and duration of which remains uncertain. While the Company cannot predict the long-term economic impact of the COVID-19 pandemic, it will continue to actively monitor the situation and may take further actions altering the Company’s business operations that it determines are in the best interests of its employees, customers, partners, suppliers, and stakeholders, or as required by authorities in the jurisdictions where the Company operates. As a result, many of the Company’s estimates and assumptions required increased judgment and carry a higher degree of variability and volatility. The ultimate effects that any such alterations or modifications may have on the Company’s business are not clear, including any potential negative effects on its business operations and financial results.
Principles of Consolidation	(b) Principles of Consolidation The accompanying interim unaudited condensed consolidated financial information include the financial statements of the Company and its wholly owned subsidiaries; the Company has no other interests. All significant intercompany balances and transactions have been eliminated in the Company’s interim unaudited condensed consolidated financial statements.
Use of estimates	(c) Use of estimates The preparation of interim unaudited 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 interim unaudited condensed consolidated financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates under different assumptions and/or conditions.
Vessels in operation	(d) Vessels in operation Vessels are generally recorded at their historical cost, which consists of the acquisition price and any material expenses incurred upon acquisition. Vessels acquired in a corporate transaction accounted for as an asset acquisition are stated at the acquisition price, which consists of consideration paid, plus transaction costs less any negative goodwill, if applicable. Vessels acquired in a corporate transaction accounted for as a business combination are recorded at fair value. Vessels acquired as part of the Marathon Merger in 2008 were accounted for under ASC 805, which required that the vessels be recorded at fair value, less the negative goodwill arising as a result of the accounting for the merger. Subsequent expenditures for major improvements and upgrades are capitalized, provided they appreciably extend the life, increase the earnings capacity or improve the efficiency or safety of the vessels. Borrowing costs incurred during the construction of vessels or as part of the prefinancing of the acquisition of vessels are capitalized. There was no Vessels are stated less accumulated depreciation and impairment, if applicable. Vessels are depreciated to their estimated residual value using the straight-line 30 years Management estimates the residual values of the Company’s container vessels based on a scrap value cost of steel times the weight of the vessel noted in lightweight tons (LWT). Residual values are periodically reviewed and revised to recognize changes in conditions, new regulations or other reasons. Revision of residual values affect the depreciable amount of the vessels and affects depreciation expense in the period of the revision and future periods. Management estimated the residual values of its vessels based on scrap rate of $ 400 For any vessel group which is impaired, the impairment charge is recorded against the cost of the vessel and the accumulated depreciation as at the date of impairment is removed from the accounts. The cost and related accumulated depreciation of assets retired or sold are removed from the accounts at the time of sale or retirement and any gain or loss is included in the interim unaudited condensed Consolidated Statements of Operations.
Assets Held for Sale	(e) Assets Held for Sale The Company classifies assets and disposal groups as being held for sale when the following criteria are met: management has committed to a plan to sell the asset (disposal group); the asset (disposal group) is available for immediate sale in its present condition; an active program to locate a buyer and other actions required to complete the plan to sell the asset (disposal group) have been initiated; the sale of the asset (disposal group) is probable, and transfer of the asset (disposal group) is expected to qualify for recognition as a completed sale within one year; the asset (disposal group) is being actively marketed for sale at a price that is reasonable in relation to its current fair value; and actions required to complete the plan indicate that it is unlikely that significant changes to the plan will be made or that the plan will be withdrawn. Long-lived assets or disposal groups classified as held for sale are measured at the lower of their carrying amount or fair value less cost to sell. These assets are not depreciated once they meet the criteria to be held for sale. As of June 30, 2021, and December 31, 2020, there were no 2. Summary of Significant Accounting Policies and Disclosures (continued)
Impairment of Long-lived assets	(f) Impairment of Long-lived assets Tangible fixed assets, such as vessels, that are held and used or to be disposed of by the Company are reviewed for impairment when events or changes in circumstances indicate that their carrying amounts may not be recoverable. In these circumstances, the Company performs step one of the impairment test by comparing the undiscounted projected net operating cash flows for each vessel group to its carrying value. A vessel group comprises the vessel, the unamortized portion of deferred drydocking related to the vessel and the related carrying value of the intangible asset or liability (if any) with respect to the time charter attached to the vessel at its purchase. If the undiscounted projected net operating cash flows of the vessel group are less than its carrying amount, management proceeds to step two of the impairment assessment by comparing the vessel group’s carrying amount to its fair value, including any applicable charter, and an impairment loss is recorded equal to the difference between the vessel group’s carrying value and fair value. Fair value is determined with the assistance from valuations obtained from third party independent ship brokers. The Company uses a number of assumptions in projecting its undiscounted net operating cash flows analysis including, among others, (i) revenue assumptions for charter rates on expiry of existing charters, which are based on forecast charter rates, where relevant, in the four years from the date of the impairment test and a reversion to the historical mean of time charter rates for each vessel thereafter Revenue assumptions are based on contracted charter rates up to the end of the existing contract of each vessel, and thereafter, estimated time charter rates for the remaining life of the vessel. The estimated time charter rate used for non-contracted revenue days of each vessel is considered a significant assumption. Recognizing that the container shipping industry is cyclical and subject to significant volatility based on factors beyond the Company’s control, management believes that using forecast charter rates in the four years from the date of the impairment assessment and a reversion to the historical mean of time charter rates thereafter, represents a reasonable benchmark for the estimated time charter rates for the non-contracted revenue days, and takes into account the volatility and cyclicality of the market. Two 7,585 912 During the six months ended June 30, 2021, there were no events or changes in circumstances which indicated that the carrying amounts of the Company’s other vessels may not be recoverable. Accordingly, no impairment test was performed.
Revenue recognition and related expense	(g) Revenue recognition and related expense The Company charters out its vessels on time charters which involves placing a vessel at a charterer’s disposal for a specified period of time during which the charterer uses the vessel in return for the payment of a specified daily hire rate. Such charters are accounted for as operating leases and therefore revenue is recognized on a straight-line basis as the average revenues over the rental periods of such charter agreements, as service is performed. Cash received in excess of earned revenue is recorded as deferred revenue. If a time charter contains one or more consecutive option periods, then subject to the options being exercisable solely by the Company, the time charter revenue will be recognized on a straight-line basis over the total remaining life of the time charter, including any options which are more likely than not to be exercised. Any difference between the charter rate invoiced and the time charter revenue recognized is classified as, or released from, deferred revenue within the interim unaudited condensed Consolidated Balance Sheets. Revenues are recorded net of address commissions, which represent a discount provided directly to the charterer based on a fixed percentage of the agreed upon charter rate. Charter revenue received in advance which relates to the period after a balance sheet date is recorded as deferred revenue within current liabilities until the respective charter services are rendered. Under time charter arrangements the Company, as owner, is responsible for all the operating expenses of the vessels, such as crew costs, insurance, repairs and maintenance, and such costs are expensed as incurred and are included in vessel operating expenses. Commission paid to brokers to facilitate the agreement of a new charter are included in time charter and voyage expenses as are certain expenses related to a voyage, such as the costs of bunker fuel consumed when a vessel is off-hire or idle. Leases: Leases where the Company acts as the lessor are classified as either operating or sales-type / direct financing leases. In cases of lease agreements where the Company acts as the lessor under an operating lease, the Company keeps the underlying asset on the consolidated balance sheets and continues to depreciate the assets over its useful life. In cases of lease agreements where the Company acts as the lessor under a sales-type / direct financing lease, the Company derecognizes the underlying asset and records a net investment in the lease. The Company acts as a lessor under operating leases in connection with all of its charter out – bareboat-out arrangements. In cases of sale and leaseback transactions, if the transfer of the asset to the lessor does not qualify as a sale, then the transaction constitutes a failed sale and leaseback and is accounted for as a financial liability. For a sale to have occurred, the control of the asset would need to be transferred to the lessor, and the lessor would need to obtain substantially all the benefits from the use of the asset. The Company has entered into two agreements which qualify as failed sale and leaseback transactions as the Company is required to repurchase the vessels at the end of the lease term and the Company has accounted for the two agreements as financing transactions. The Company elected the practical expedient which allows the Company to treat the lease and non-lease components as a single lease component for the leases where the timing and pattern of transfer for the nonlease component and the associated lease component to the lessees are the same and the lease component, if accounted for separately, would be classified as an operating lease. The combined component is therefore accounted for as an operating lease under ASC 842, as the lease components are the predominant characteristics, in 2020 and 2019. The Company adopted the new “Leases” standard (Topic 842) on January 1, 2019 using the modified retrospective method. The Company elected the practical expedient to use the effective date of adoption as the date of initial application. Furthermore the Company elected practical expedients, which allow entities (i) to not reassess whether any expired or existing contracts are considered or contain leases; (ii) to not reassess the lease classification for any expired or existing leases (iii) to not reassess initial direct costs for any existing leases and (iv) which allows to treat the lease and non-lease components as a single lease component due to its predominant characteristic. The adoption of this standard did not have a material effect on the interim unaudited condensed consolidated financial statements since the Company is primarily a lessor and the accounting for lessors is largely unchanged under this standard. 2. Summary of Significant Accounting Policies and Disclosures (continued)
Fair Value Measurement and Financial Instruments	(h) Fair Value Measurement and Financial Instruments Financial instruments carried on the balance sheet include cash and cash equivalents, restricted cash, trade receivables and payables, other receivables and other liabilities and long-term debt. The particular recognition methods applicable to each class of financial instrument are disclosed in the applicable significant policy description of each item or included below as applicable. Fair value measurement: Level 1 - Level 2 - Level 3 - As at March 31, 2020, two of the Company’s vessel groups that were held and used with a total aggregate carrying amount of $ 15,585 8,000 7,585 8,008 7,096 912 8,497 Financial Risk Management: Credit risk: Financial instruments that potentially subject the Company to concentrations of credit risk are accounts receivable and cash and cash equivalents. The Company does not believe its exposure to credit risk is likely to have a material adverse effect on its financial position, results of operations or cash flows. Liquidity Risk: 2. Summary of Significant Accounting Policies and Disclosures (continued)
Recent accounting pronouncements	(i) Recent accounting pronouncements The Company does not believe that any recently issued, but not yet effective, accounting pronouncements would have a material impact on its interim unaudited condensed consolidated financial statements.

Description of Business (Tables

Description of Business (Tables)	6 Months Ended
	Jun. 30, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Description of Business - Schedule of Vessels (Table)	Description of Business - Schedule of Vessels (Table) Company Name (1) Fleet Country of Incorporation Vessel Name Capacity in TEUs (2) Year Built Earliest Charter Expiry Date Global Ship Lease 54 LLC GSL Liberia CMA CGM Thalassa 11,040 2008 4Q25 Laertis Marine LLC Poseidon Marshall Islands UASC Al Khor 9,115 2015 1Q22 Penelope Marine LLC Poseidon Marshall Islands Maira XL 9,115 2015 2Q22 Telemachus Marine LLC (3) Poseidon Marshall Islands Anthea Y 9,115 2015 3Q23 Global Ship Lease 53 LLC GSL Liberia MSC Tianjin 8,603 2005 2Q24 Global Ship Lease 52 LLC GSL Liberia MSC Qingdao 8,603 2004 2Q24 Global Ship Lease 43 LLC GSL Liberia GSL Ningbo 8,603 2004 1Q23 Global Ship Lease 30 Limited — Marshall Islands GSL Eleni 7,847 2004 3Q24 (4) Global Ship Lease 31 Limited — Marshall Islands GSL Kalliopi 7,847 2004 4Q22 (4) Global Ship Lease 32 Limited — Marshall Islands GSL Grania 7,847 2004 4Q22 (4) Alexander Marine LLC Poseidon Marshall Islands Mary 6,927 2013 3Q23 Hector Marine LLC Poseidon Marshall Islands Kristina 6,927 2013 2Q24 Ikaros Marine LLC Poseidon Marshall Islands Katherine 6,927 2013 1Q24 Philippos Marine LLC Poseidon Marshall Islands Alexandra 6,927 2013 1Q24 Aristoteles Marine LLC Poseidon Marshall Islands Alexis 6,882 2015 1Q24 Menelaos Marine LLC Poseidon Marshall Islands Olivia I 6,882 2015 1Q24 Global Ship Lease 48 LLC GSL Liberia CMA CGM Berlioz 6,621 2001 4Q25 Leonidas Marine LLC Poseidon Marshall Islands Agios Dimitrios 6,572 2011 4Q23 Global Ship Lease 35 LLC — Liberia GSL Nicoletta 6,840 2002 3Q24 (6) Global Ship Lease 36 LLC — Liberia GSL Christen 6,840 2002 3Q23 (5) Global Ship Lease 33 LLC — Liberia GSL Vinia 6,080 2004 3Q24 Global Ship Lease 34 LLC — Liberia GSL Christel Elisabeth 6,080 2004 2Q24 GSL Arcadia LLC Seven Vessels Liberia GSL Arcadia 6,008 2000 2Q24 GSL Melita LLC Seven Vessels Liberia tbr GSL Melita (8) 6,008 2001 2Q24 GSL Maria LLC Seven Vessels Liberia tbr GSL Maria (8) 6,008 2001 3Q24 GSL Violetta LLC (3) Seven Vessels Liberia GSL Violetta 6,008 2000 4Q24 GSL Tegea LLC Seven Vessels Liberia GSL Tegea 6,008 2001 2Q24 GSL Dorothea LLC Seven Vessels Liberia tbr GSL Dorothea (8) 6,008 2001 2Q24 Tasman Marine LLC Poseidon Marshall Islands Tasman 5,936 2000 1Q22 Hudson Marine LLC Poseidon Marshall Islands Zim Europe 5,936 2000 1Q24 (7) Drake Marine LLC Poseidon Marshall Islands Ian H 5,936 2000 2Q24 (7) Hephaestus Marine LLC Poseidon Marshall Islands Dolphin II 5,095 2007 1Q22 Zeus One Marine LLC Poseidon Marshall Islands Orca I 5,095 2006 2Q24 (9) Global Ship Lease 47 LLC GSL Liberia GSL Château d’If 5,089 2007 4Q26 (10) GSL Alcazar Inc. GSL Marshall Islands CMA CGM Alcazar 5,089 2007 3Q26 (10) Global Ship Lease 50 LLC GSL Liberia CMA CGM Jamaica 4,298 2006 3Q22 Global Ship Lease 49 LLC GSL Liberia CMA CGM Sambhar 4,045 2006 3Q22 Global Ship Lease 51 LLC GSL Liberia CMA CGM America 4,045 2006 3Q22 Global Ship Lease 42 LLC GSL Liberia GSL Valerie 2,824 2005 3Q21 Pericles Marine LLC Poseidon Marshall Islands Athena 2,762 2003 2Q24 (11) Aris Marine LLC Poseidon Marshall Islands Maira 2,506 2000 1Q23 Aphrodite Marine LLC Poseidon Marshall Islands Nikolas 2,506 2000 1Q23 Athena Marine LLC Poseidon Marshall Islands Newyorker 2,506 2001 1Q24 Global Ship Lease 38 LLC GSL Liberia Manet 2,272 2001 4Q21 Global Ship Lease 40 LLC GSL Liberia Keta 2,207 2003 3Q21 Global Ship Lease 41 LLC GSL Liberia Julie 2,207 2002 1Q23 (12) Global Ship Lease 45 LLC GSL Liberia Kumasi 2,207 2002 3Q21 Global Ship Lease 44 LLC GSL Liberia Marie Delmas 2,207 2002 3Q21 (1) All subsidiaries are 100% owned, either directly or indirectly; (2) Twenty-foot Equivalent Units; (3) Currently, vessel-operating company under a sale and leaseback transaction. (4) GSL Eleni delivered 2Q2019 and is chartered for five years; GSL Kalliopi (delivered 4Q2019) and GSL Grania (delivered 3Q2019) are chartered for three years plus two successive periods of one year at the option of the charterer; (5) GSL Christen commenced a charter with Maersk in July 2020 for 2 – 10 months, at charterer’s option. In 2Q21 the charter was extended, in direct continuation, for 27—30 months; (6) GSL Nicoletta commenced a charter with MSC in July 2020; upon conclusion of that charter in 3Q2021, GSL Nicoletta will be chartered to Maersk for 36—40 months; (7) A package agreement with ZIM, for direct charter extensions on two 5,900 TEU ships: Ian H from May 2021 and Zim Europe (formerly Dimitris Y) from May 2022.On April 9, 2021, Dimiris Y has been renamed to Zim Europe; (8)“tbr” means “to be renamed”; (9) Orca I. Chartered to Maersk 2Q2021, at which time the charter was extended in direct continuation for 36—39 months; thereafter Maersk has the option to charter the vessel for a further 12-14 months; (10) CMA CGM Alcazar and GSL Chateau d’If. Both ships have been forward fixed for five years with the new charters due to commence in 4Q2021; (11) Athena was chartered to MSC to 2Q2021, at which time the vessel was drydocked. Thereafter Athena was fixed on charter to Hapag-Lloyd for 35—37 months; (12) Julie. Chartered to 2Q2021 with Sea Consortium; thereafter extended in direct continuation to 1Q2023 (earliest). 1. Description of Business (continued)
Description of Business - Schedule of new contractual vessels (Table)	Description of Business - Schedule of new contractual vessels (Table) Vessel Name (1) Capacity in TEUs Lightweight (tons) Year Built Charterer tbr GSL MYNY 6,008 24,873 2000 Maersk tbr GSL Tripoli 5,470 22,259 2009 Maersk tbr GSL Kithira 5,470 22,108 2009 Maersk tbr GSL Tinos 5,470 22,067 2010 Maersk tbr GSL Syros 5,470 22,098 2010 Maersk tbr GSL Susan 4,363 17,309 2008 CMA CGM tbr GSL Rossi 3,421 16,309 2012 Gold Star tbr GSL Alice 3,421 16,209 2014 CMA CGM tbr GSL Eleftheria 3,405 16,209 2013 Maersk tbr GSL Melina 3,400 16,209 2013 Maersk tbr Matson Molokai 2,824 12,032 2007 Matson tbr GSL Lalo 2,824 11,951 2006 ONE tbr GSL Mercer 2,824 11,970 2007 Hapag Lloyd tbr GSL Elizabeth 2,742 11,507 2006 ONE tbr GSL Chloe 2,546 12,212 2012 ONE tbr GSL Maren 2,546 12,212 2014 Westwood tbr GSL Amstel 1,118 5,167 2008 CMA CGM (1) To be renamed “tbr”.

Vessels in Operation (Tables)

Vessels in Operation (Tables)	6 Months Ended
	Jun. 30, 2021
Property, Plant and Equipment [Abstract]
Vessels in Operation - Schedule of Vessels in Operation, Less Accumulated Depreciation (Table)	Vessels in Operation - Schedule of Vessels in Operation, Less Accumulated Depreciation (Table) Vessel Cost, as adjusted for Impairment charges Accumulated Depreciation Net Book Value As of January 1, 2020 $ 1,306,936 $ (151,350) $ 1,155,586 Additions 41,710 — 41,710 Disposals (7,058) — (7,058) Depreciation — (41,158) (41,158) Impairment loss (43,803) 35,306 (8,497) As of December 31, 2020 $ 1,297,785 $ (157,202) $ 1,140,583 Additions 102,226 — 102,226 Disposals (23,167) 14,445 (8,722) Depreciation — (21,445) (21,445) As of June 30, 2021 $ 1,376,844 $ (164,202) $ 1,212,642

Long-Term Debt (Tables)

Long-Term Debt (Tables)	6 Months Ended
	Jun. 30, 2021
Debt Disclosure [Abstract]
Long-Term Debt - Schedule of Long-Term Debt (Table)	Long-Term Debt - Schedule of Long-Term Debt (Table) Facilities June 30, 2021 December 31, 2020 Deutsche Credit Facility (a) $ 51,670 $ — HCOB Credit Facility (b) 53,500 — CACIB, Bank Sinopac, CTBC Credit Facility (c) 51,700 — New Hayfin Credit Facility (d) 217,249 — Chailease Credit Facility (e) 6,660 7,596 2024 Notes (f) 82,521 59,819 Syndicated Senior Secured Credit Facility (CACIB, ABN, CIT, Siemens, CTBC, Bank Sinopac, Palatine) (g) 225,600 238,000 Blue Ocean Junior Credit Facility (g, h) 26,205 38,500 Hellenic Bank Credit Facility (i) 45,700 49,700 Deutsche, CIT, HCOB, Entrust, Blue Ocean Credit Facility (j) — 149,055 Hayfin Credit Facility (k) 5,833 5,833 $ 766,638 $ 548,503 2022 Notes 233,436 322,723 Less redemptions and repurchases (233,436) (89,287) 2022 Notes (l) $ — $ 233,436 Total credit facilities $ 766,638 $ 781,939 Sale and Leaseback Agreement CMBFL – $54,000 (m) 54,000 — Sale and Leaseback Agreement – Neptune $14,735 (n) 14,735 — Total Sale and Leaseback Agreements $ 68,735 $ — Total borrowings $ 835,373 $ 781,939 Less: Current portion of 2022 Notes (l) — (26,240) Less: Current portion of long-term debt (84,037) (50,441) Less: Current portion of Sale and Leaseback Agreements (m, n) (11,275) — Less: Original issue discount of 2022 Notes (l) — -1,333 (1,133) Less: Original issue premium/(discount) of 2024 Notes (f) 109 -147 (147) Less: Deferred financing costs (p) (14,162) (11,203) Non-current portion of Long-Term Debt $ 726,008 $ 692,775
Long-Term Debt - Repayment schedule (Table)	Long-Term Debt - Repayment schedule (Table) Payment due by period ended Amount June 30, 2022 $ 95,312 June 30, 2023 100,936 June 30, 2024 93,939 June 30, 2025 335,495 June 30, 2026 and thereafter 209,691 $ 835,373
Long-Term Debt - Schedule of Deferred Financing Costs (Table)	Long-Term Debt - Schedule of Deferred Financing Costs (Table) June 30, 2021 December 31, 2020 Opening balance $ 11,203 $ 14,095 Expenditure in the period 8,322 1,193 Amortization included within interest expense (5,363) (4,085) Closing balance $ 14,162 $ 11,203

Commitments and Contingencies (

Commitments and Contingencies (Tables)	6 Months Ended
	Jun. 30, 2021
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies - Charter Hire Receivable (Table)	Commitments and Contingencies - Charter Hire Receivable (Table) Period ending Amount June 30, 2022 $ 347,628 June 30, 2023 290,993 June 30, 2024 210,411 June 30, 2025 62,282 Thereafter 41,267 Total minimum lease revenue, net of address commissions $ 952,581

Share-Based Compensation (Table

Share-Based Compensation (Tables)	6 Months Ended
	Jun. 30, 2021
Share-based Payment Arrangement [Abstract]
Share-Based Compensation - Summary of Share, Based Awards (Table)	Share-Based Compensation - Summary of Share, Based Awards (Table) Restricted Stock Units Number of Units Number Weighted Average Fair Value on Grant Date Actual Fair Value on Vesting Date Unvested as at January 1, 2020 1,246,096 $ 3.79 n/a Vested in 2020 (317,188) — 4.45 Unvested as at December 31, 2020 928,908 $ 3.79 n/a Granted on March 11, 2021 61,625 11.72 n/a Vested in six months ended June 30, 2021 (931,320) n/a 3.83 Unvested as at June 30, 2021 59,213 $ 5.08 n/a

Earnings per Share (Tables)

Earnings per Share (Tables)	6 Months Ended
	Jun. 30, 2021
Earnings Per Share [Abstract]
Earnings per Share (Table)	Earnings per Share (Table) Six months ended June 30, 2021 2020 Numerator: Net income attributable to common shareholders $ 34,224 $ 13,226 Undistributed income attributable to Series C participating preferred shares — (5,602) Net income available to common shareholders, basic and diluted $ 34,224 $ 7,624 Net income available to: Class A, basic and diluted 34,224 7,624 Denominator: Class A Common shares Basic weighted average number of common shares outstanding 34,136,307 17,632,674 Plus weighted average number of RSUs with service conditions 31,786 97,954 Common share and common share equivalents, dilutive 34,168,093 17,730,628 Basic earnings per share: Class A 1.00 0.43 Diluted earnings per share: Class A 1.00 0.43 Series C Preferred Shares-basic and diluted earnings per share: Undistributed income attributable to Series C participating preferred shares $ — $ 5,602 Basic weighted average number of Series C Preferred shares outstanding, as converted — 12,955,188 Plus weighted average number of RSUs with service conditions — 71,970 Dilutive weighted average number of Series C Preferred shares outstanding, as converted — 13,027,157 Basic earnings per share n/a 0.43 Diluted earnings per share n/a 0.43

Description of Business - Sched

Description of Business - Schedule of Vessels (Table) (Details)	6 Months Ended
	Jun. 30, 2021
Global Ship Lease 54 LLC [Member]
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Fleet	GSL
Country of incorporation	Liberia
Vessel Name	CMA CGM Thalassa
Capacity in TEUs	11,040
Year Built	2008
Earliest Charter Expiry Date	4Q25
Laertis Marine LLC [Member]
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Fleet	Poseidon
Country of incorporation	Marshall Islands
Vessel Name	UASC Al Khor
Capacity in TEUs	9,115
Year Built	2015
Earliest Charter Expiry Date	1Q22
Penelope Marine LLC [Member]
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Fleet	Poseidon
Country of incorporation	Marshall Islands
Vessel Name	Maira XL
Capacity in TEUs	9,115
Year Built	2015
Earliest Charter Expiry Date	2Q22
Telemachus Marine LLC [Member]
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Fleet	Poseidon
Country of incorporation	Marshall Islands
Vessel Name	Anthea Y
Capacity in TEUs	9,115
Year Built	2015
Earliest Charter Expiry Date	3Q23
Global Ship Lease 53 LLC [Member]
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Fleet	GSL
Country of incorporation	Liberia
Vessel Name	MSC Tianjin
Capacity in TEUs	8,603
Year Built	2005
Earliest Charter Expiry Date	2Q24
Global Ship Lease 52 LLC [Member]
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Fleet	GSL
Country of incorporation	Liberia
Vessel Name	MSC Qingdao
Capacity in TEUs	8,603
Year Built	2004
Earliest Charter Expiry Date	2Q24
Global Ship Lease 43 LLC [Member]
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Fleet	GSL
Country of incorporation	Liberia
Vessel Name	GSL Ningbo
Capacity in TEUs	8,603
Year Built	2004
Earliest Charter Expiry Date	1Q23
Global Ship Lease 30 Limited [Member]
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Fleet
Country of incorporation	Marshall Islands
Vessel Name	GSL Eleni
Capacity in TEUs	7,847
Year Built	2004
Earliest Charter Expiry Date	3Q24(4)
Global Ship Lease 31 Limited [Member]
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Fleet
Country of incorporation	Marshall Islands
Vessel Name	GSL Kalliopi
Capacity in TEUs	7,847
Year Built	2004
Earliest Charter Expiry Date	4Q22(4)
Global Ship Lease 32 Limited [Member]
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Fleet
Country of incorporation	Marshall Islands
Vessel Name	GSL Grania
Capacity in TEUs	7,847
Year Built	2004
Earliest Charter Expiry Date	4Q22(4)
Alexander Marine LLC [Member]
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Fleet	Poseidon
Country of incorporation	Marshall Islands
Vessel Name	Mary
Capacity in TEUs	6,927
Year Built	2013
Earliest Charter Expiry Date	3Q23
Hector Marine LLC [Member]
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Fleet	Poseidon
Country of incorporation	Marshall Islands
Vessel Name	Kristina
Capacity in TEUs	6,927
Year Built	2013
Earliest Charter Expiry Date	2Q24
Ikaros Marine LLC [Member]
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Fleet	Poseidon
Country of incorporation	Marshall Islands
Vessel Name	Katherine
Capacity in TEUs	6,927
Year Built	2013
Earliest Charter Expiry Date	1Q24
Philippos Marine LLC [Member]
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Fleet	Poseidon
Country of incorporation	Marshall Islands
Vessel Name	Alexandra
Capacity in TEUs	6,927
Year Built	2013
Earliest Charter Expiry Date	1Q24
Aristoteles Marine LLC [Member]
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Fleet	Poseidon
Country of incorporation	Marshall Islands
Vessel Name	Alexis
Capacity in TEUs	6,882
Year Built	2015
Earliest Charter Expiry Date	1Q24
Menelaos Marine LLC [Member]
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Fleet	Poseidon
Country of incorporation	Marshall Islands
Vessel Name	Olivia I
Capacity in TEUs	6,882
Year Built	2015
Earliest Charter Expiry Date	1Q24
Global Ship Lease 48 LLC [Member]
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Fleet	GSL
Country of incorporation	Liberia
Vessel Name	CMA CGM Berlioz
Capacity in TEUs	6,621
Year Built	2001
Earliest Charter Expiry Date	4Q25
Leonidas Marine LLC [Member]
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Fleet	Poseidon
Country of incorporation	Marshall Islands
Vessel Name	Agios Dimitrios
Capacity in TEUs	6,572
Year Built	2011
Earliest Charter Expiry Date	4Q23
Global Ship Lease 35 LLC [Member]
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Fleet
Country of incorporation	Liberia
Vessel Name	GSL Nicoletta
Capacity in TEUs	6,840
Year Built	2002
Earliest Charter Expiry Date	3Q24(6)
Global Ship Lease 36 LLC [Member]
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Fleet
Country of incorporation	Liberia
Vessel Name	GSL Christen
Capacity in TEUs	6,840
Year Built	2002
Earliest Charter Expiry Date	3Q23(5)
Global Ship Lease 33 LLC [Member]
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Fleet
Country of incorporation	Liberia
Vessel Name	GSL Vinia
Capacity in TEUs	6,080
Year Built	2004
Earliest Charter Expiry Date	3Q24
Global Ship Lease 34 LLC [Member]
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Fleet
Country of incorporation	Liberia
Vessel Name	GSL Christel Elisabeth
Capacity in TEUs	6,080
Year Built	2004
Earliest Charter Expiry Date	2Q24
GSL Arcadia LLC [Member]
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Fleet	Seven Vessels
Country of incorporation	Liberia
Vessel Name	GSL Arcadia
Capacity in TEUs	6,008
Year Built	2000
Earliest Charter Expiry Date	2Q24
GSL Melita LLC [Member]
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Fleet	Seven Vessels
Country of incorporation	Liberia
Vessel Name	tbr GSL Melita (8)
Capacity in TEUs	6,008
Year Built	2001
Earliest Charter Expiry Date	2Q24
GSL Maria LLC [Member]
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Fleet	Seven Vessels
Country of incorporation	Liberia
Vessel Name	tbr GSL Maria (8)
Capacity in TEUs	6,008
Year Built	2001
Earliest Charter Expiry Date	3Q24
GSL Violetta LLC [Member]
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Fleet	Seven Vessels
Country of incorporation	Liberia
Vessel Name	GSL Violetta
Capacity in TEUs	6,008
Year Built	2000
Earliest Charter Expiry Date	4Q24
GSL Tegea LLC [Member]
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Fleet	Seven Vessels
Country of incorporation	Liberia
Vessel Name	GSL Tegea
Capacity in TEUs	6,008
Year Built	2001
Earliest Charter Expiry Date	2Q24
GSL Dorothea LLC [Member]
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Fleet	Seven Vessels
Country of incorporation	Liberia
Vessel Name	tbr GSL Dorothea (8)
Capacity in TEUs	6,008
Year Built	2001
Earliest Charter Expiry Date	2Q24
Tasman Marine LLC [Member]
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Fleet	Poseidon
Country of incorporation	Marshall Islands
Vessel Name	Tasman
Capacity in TEUs	5,936
Year Built	2000
Earliest Charter Expiry Date	1Q22
Hudson Marine LLC [Member]
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Fleet	Poseidon
Country of incorporation	Marshall Islands
Vessel Name	Zim Europe
Capacity in TEUs	5,936
Year Built	2000
Earliest Charter Expiry Date	1Q24(7)
Drake Marine LLC [Member]
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Fleet	Poseidon
Country of incorporation	Marshall Islands
Vessel Name	Ian H
Capacity in TEUs	5,936
Year Built	2000
Earliest Charter Expiry Date	2Q24(7)
Hephaestus Marine LLC [Member]
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Fleet	Poseidon
Country of incorporation	Marshall Islands
Vessel Name	Dolphin II
Capacity in TEUs	5,095
Year Built	2007
Earliest Charter Expiry Date	1Q22
Zeus One Marine LLC [Member]
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Fleet	Poseidon
Country of incorporation	Marshall Islands
Vessel Name	Orca I
Capacity in TEUs	5,095
Year Built	2006
Earliest Charter Expiry Date	2Q24(9)
Global Ship Lease 47 LLC [Member]
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Fleet	GSL
Country of incorporation	Liberia
Vessel Name	GSL Château d’If
Capacity in TEUs	5,089
Year Built	2007
Earliest Charter Expiry Date	4Q26(10)
GSL Alcazar Inc. [Member]
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Fleet	GSL
Country of incorporation	Marshall Islands
Vessel Name	CMA CGM Alcazar
Capacity in TEUs	5,089
Year Built	2007
Earliest Charter Expiry Date	3Q26(10)
Global Ship Lease 50 LLC [Member]
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Fleet	GSL
Country of incorporation	Liberia
Vessel Name	CMA CGM Jamaica
Capacity in TEUs	4,298
Year Built	2006
Earliest Charter Expiry Date	3Q22
Global Ship Lease 49 LLC [Member]
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Fleet	GSL
Country of incorporation	Liberia
Vessel Name	CMA CGM Sambhar
Capacity in TEUs	4,045
Year Built	2006
Earliest Charter Expiry Date	3Q22
Global Ship Lease 51 LLC [Member]
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Fleet	GSL
Country of incorporation	Liberia
Vessel Name	CMA CGM America
Capacity in TEUs	4,045
Year Built	2006
Earliest Charter Expiry Date	3Q22
Global Ship Lease 42 LLC [Member]
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Fleet	GSL
Country of incorporation	Liberia
Vessel Name	GSL Valerie
Capacity in TEUs	2,824
Year Built	2005
Earliest Charter Expiry Date	3Q21
Pericles Marine LLC [Member]
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Fleet	Poseidon
Country of incorporation	Marshall Islands
Vessel Name	Athena
Capacity in TEUs	2,762
Year Built	2003
Earliest Charter Expiry Date	2Q24(11)
Aris Marine LLC [Member]
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Fleet	Poseidon
Country of incorporation	Marshall Islands
Vessel Name	Maira
Capacity in TEUs	2,506
Year Built	2000
Earliest Charter Expiry Date	1Q23
Aphrodite Marine LLC [Member]
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Fleet	Poseidon
Country of incorporation	Marshall Islands
Vessel Name	Nikolas
Capacity in TEUs	2,506
Year Built	2000
Earliest Charter Expiry Date	1Q23
Athena Marine LLC [Member]
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Fleet	Poseidon
Country of incorporation	Marshall Islands
Vessel Name	Newyorker
Capacity in TEUs	2,506
Year Built	2001
Earliest Charter Expiry Date	1Q24
Global Ship Lease 38 LLC [Member]
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Fleet	GSL
Country of incorporation	Liberia
Vessel Name	Manet
Capacity in TEUs	2,272
Year Built	2001
Earliest Charter Expiry Date	4Q21
Global Ship Lease 40 LLC [Member]
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Fleet	GSL
Country of incorporation	Liberia
Vessel Name	Keta
Capacity in TEUs	2,207
Year Built	2003
Earliest Charter Expiry Date	3Q21
Global Ship Lease 41 LLC [Member]
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Fleet	GSL
Country of incorporation	Liberia
Vessel Name	Julie
Capacity in TEUs	2,207
Year Built	2002
Earliest Charter Expiry Date	1Q23(12)
Global Ship Lease 45 LLC [Member]
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Fleet	GSL
Country of incorporation	Liberia
Vessel Name	Kumasi
Capacity in TEUs	2,207
Year Built	2002
Earliest Charter Expiry Date	3Q21
Global Ship Lease 44 LLC [Member]
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Fleet	GSL
Country of incorporation	Liberia
Vessel Name	Marie Delmas
Capacity in TEUs	2,207
Year Built	2002
Earliest Charter Expiry Date	3Q21

Description of Business - Sch_2

Description of Business - Schedule of new contractual vessels (Table) (Details)	6 Months Ended
	Jun. 30, 2021
GSL MYNY [Member]
Lessor, Lease, Description [Line Items]
Capacity in TEUs	6,008
Lightweight (tons)	24,873
Year Built	2000
Charterer	Maersk
GSL Tripoli [Member]
Lessor, Lease, Description [Line Items]
Capacity in TEUs	5,470
Lightweight (tons)	22,259
Year Built	2009
Charterer	Maersk
GSL Kithira [Member]
Lessor, Lease, Description [Line Items]
Capacity in TEUs	5,470
Lightweight (tons)	22,108
Year Built	2009
Charterer	Maersk
GSL Tinos [Member]
Lessor, Lease, Description [Line Items]
Capacity in TEUs	5,470
Lightweight (tons)	22,067
Year Built	2010
Charterer	Maersk
GSL Syros [Member]
Lessor, Lease, Description [Line Items]
Capacity in TEUs	5,470
Lightweight (tons)	22,098
Year Built	2010
Charterer	Maersk
GSL Suzan [Member]
Lessor, Lease, Description [Line Items]
Capacity in TEUs	4,363
Lightweight (tons)	17,309
Year Built	2008
Charterer	CMA CGM
GSL Rossi [Member]
Lessor, Lease, Description [Line Items]
Capacity in TEUs	3,421
Lightweight (tons)	16,309
Year Built	2012
Charterer	Gold Star
GSL Alice [Member]
Lessor, Lease, Description [Line Items]
Capacity in TEUs	3,421
Lightweight (tons)	16,209
Year Built	2014
Charterer	CMA CGM
GSL Eleftheria [Member]
Lessor, Lease, Description [Line Items]
Capacity in TEUs	3,405
Lightweight (tons)	16,209
Year Built	2013
Charterer	Maersk
GSL Melina [Member]
Lessor, Lease, Description [Line Items]
Capacity in TEUs	3,400
Lightweight (tons)	16,209
Year Built	2013
Charterer	Maersk
Matson Molokai [Member]
Lessor, Lease, Description [Line Items]
Capacity in TEUs	2,824
Lightweight (tons)	12,032
Year Built	2007
Charterer	Matson
GSL Lalo [Member]
Lessor, Lease, Description [Line Items]
Capacity in TEUs	2,824
Lightweight (tons)	11,951
Year Built	2006
Charterer	ONE
GSL Mercer [Member]
Lessor, Lease, Description [Line Items]
Capacity in TEUs	2,824
Lightweight (tons)	11,970
Year Built	2007
Charterer	Hapag Lloyd
GSL Elizabeth [Member]
Lessor, Lease, Description [Line Items]
Capacity in TEUs	2,742
Lightweight (tons)	11,507
Year Built	2006
Charterer	ONE
GSL Chloe [Member]
Lessor, Lease, Description [Line Items]
Capacity in TEUs	2,546
Lightweight (tons)	12,212
Year Built	2012
Charterer	ONE
GSL Maren [Member]
Lessor, Lease, Description [Line Items]
Capacity in TEUs	2,546
Lightweight (tons)	12,212
Year Built	2014
Charterer	Westwood
GSL Amstel [Member]
Lessor, Lease, Description [Line Items]
Capacity in TEUs	1,118
Lightweight (tons)	5,167
Year Built	2008
Charterer	CMA CGM

Description of Business (Detail

Description of Business (Details Narrative) $ in Thousands	1 Months Ended	6 Months Ended		11 Months Ended
	Feb. 09, 2021USD ($)	Jun. 30, 2021USD ($)	Jun. 28, 2021USD ($)	Nov. 15, 2018
Number of vessels purchased		17
Number of vessels owned		65
Date of delivery		third and fourth quarter 2021
La Tour [Member]
Number of vessels to be sold		1
Year Build		2001
Capacity in TEUs		2,272
Seven Vessels [Member]
Number of vessels purchased	7
Capacity in TEUs	6,000
Weighted average age, weighted by TEU capacity	20 years
Aggregate purchase price	$ 116,000
Seven Vessels [Member] | Minimum [Member]
Lessor, Operating Lease, Term of Contract	36 months
Twelve Vessels [Member]
Number of vessels purchased			12
Date of delivery		July 15, 2021 and 29, 2021
Weighted average age, weighted by TEU capacity		11 years
Aggregate purchase price			$ 233,890
Four Vessels [Member]
Number of vessels purchased		4
Capacity in TEUs		5,470
Date of delivery		during the third and fourth quarter of 2021
Weighted average age, weighted by TEU capacity		11 years
Aggregate purchase price		$ 148,000
Lessor, Operating Lease, Term of Contract		3 years
Poseidon Transaction [Member]
Number of vessels purchased				20
Number of vessels owned				19
Poseidon Transaction [Member] | Argos [Member]
Number of vessels sold				1

Summary of Significant Accoun_3

Summary of Significant Accounting Policies and Disclosures (Details Narrative)	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2020USD ($)	Mar. 31, 2020USD ($)	Jun. 30, 2021USD ($)	Jun. 30, 2020USD ($)	Dec. 31, 2020USD ($)
Property, Plant and Equipment [Line Items]
Capitalized interest			$ 0		$ 0
Depreciation method			straight-line
Vessel estimated useful life			30 years
Estimated residual scrap value of vessels per lightweight ton (LWT)			$ 400
Assets held for sale			$ 0		0
Future charter rate assumptions			charter rates on expiry of existing charters, which are based on forecast charter rates, where relevant, in the four years from the date of the impairment test and a reversion to the historical mean of time charter rates for each vessel thereafter
Impairment charges			$ 0	$ 8,497,000
Total aggregate carrying amount			$ 1,212,642,000		$ 1,140,583,000
Two Vessel Groups [Member]
Property, Plant and Equipment [Line Items]
Impairment charges	$ 912,000	$ 7,585,000
GSL Matisse And Utrillo [Member]
Property, Plant and Equipment [Line Items]
Number of vessels to be sold			2
Impairment charges	912,000	7,585,000		8,497,000
Total aggregate carrying amount	8,008,000	15,585,000		8,008,000
Fair value of property, plant and equipment	$ 7,096,000	$ 8,000,000		$ 7,096,000

Vessels in Operation - Schedule

Vessels in Operation - Schedule of Vessels in Operation, Less Accumulated Depreciation (Table) (Details) - USD ($) $ in Thousands	6 Months Ended		12 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020
Property, Plant and Equipment [Line Items]
Balance	$ 1,140,583
Impairment loss	0	$ (8,497)
Property, Plant and Equipment, Net, Ending Balance	1,212,642		$ 1,140,583
Vessel Gross Cost,as adjusted for impairment charges [Member]
Property, Plant and Equipment [Line Items]
Balance	1,297,785	1,306,936	1,306,936
Additions	102,226		41,710
Disposals	(23,167)		(7,058)
Impairment loss			(43,803)
Balance	1,376,844		1,297,785
Accumulated Depreciation [Member]
Property, Plant and Equipment [Line Items]
Balance	(157,202)	(151,350)	(151,350)
Disposals	14,445
Depreciation	(21,445)		(41,158)
Impairment loss			35,306
Balance	(164,202)		(157,202)
Net Book Value [Member]
Property, Plant and Equipment [Line Items]
Balance	1,140,583	$ 1,155,586	1,155,586
Additions	102,226		41,710
Disposals	(8,722)		(7,058)
Depreciation	(21,445)		(41,158)
Impairment loss			(8,497)
Property, Plant and Equipment, Net, Ending Balance	$ 1,212,642		$ 1,140,583

Vessels in Operation (Details N

Vessels in Operation (Details Narrative) $ in Thousands

1 Months Ended

2 Months Ended

3 Months Ended

4 Months Ended

5 Months Ended

6 Months Ended

7 Months Ended

12 Months Ended

Feb. 09, 2021USD ($)

Feb. 29, 2020USD ($)

Feb. 21, 2020USD ($)

Jun. 30, 2020USD ($)

Mar. 31, 2020USD ($)

Apr. 28, 2021USD ($)

Apr. 26, 2021USD ($)

May 25, 2021USD ($)

May 17, 2021USD ($)

Jun. 30, 2021USD ($)

Jun. 28, 2021USD ($)

Jul. 03, 2020USD ($)

Jun. 30, 2020USD ($)

Jul. 20, 2020USD ($)

Dec. 31, 2020USD ($)

Property, Plant and Equipment [Line Items]

Vessel impairment losses

$ 0

$ 8,497

Advances for vessels acquisitions and other additions

27,645

$ 1,364

Ballast water treatments and other additions amount

$ 1,828

$ 1,364

New Hayfin Credit Facility [Member]

Property, Plant and Equipment [Line Items]

Number of vessels pledged as collateral

20

Other Loan Facilities [Member]

Property, Plant and Equipment [Line Items]

Number of vessels pledged as collateral

28

La Tour [Member]

Property, Plant and Equipment [Line Items]

Proceeds from Sale of Property, Plant, and Equipment

$ 16,514

Net gain from vessel sale

$ 7,770

Year built

2001

Capacity in TEUs

2,272

GSL Melita [Member]

Property, Plant and Equipment [Line Items]

Vessel delivery date

May 25, 2021

Year built

2001

Capacity in TEUs

6,008

Vessel acquisition cost

$ 15,500

GSL Tegea [Member]

Property, Plant and Equipment [Line Items]

Vessel delivery date

May 17, 2021

Year built

2001

Capacity in TEUs

6,008

Vessel acquisition cost

$ 15,500

GSL Violetta [Member]

Property, Plant and Equipment [Line Items]

Vessel delivery date

Apr. 28, 2021

Year built

2000

Capacity in TEUs

6,008

Vessel acquisition cost

$ 17,300

GSL Maria [Member]

Property, Plant and Equipment [Line Items]

Vessel delivery date

Apr. 28, 2021

Year built

2001

Capacity in TEUs

6,008

Vessel acquisition cost

$ 16,600

GSL Arcadia [Member]

Property, Plant and Equipment [Line Items]

Vessel delivery date

Apr. 26, 2021

Year built

2000

Capacity in TEUs

6,008

Vessel acquisition cost

$ 18,000

GSL Dorothea [Member]

Property, Plant and Equipment [Line Items]

Vessel delivery date

Apr. 26, 2021

Year built

2001

Capacity in TEUs

6,008

Vessel acquisition cost

$ 15,500

Utrillo [Member]

Property, Plant and Equipment [Line Items]

Proceeds from Sale of Property, Plant, and Equipment

$ 3,411

GSL Matisse [Member]

Property, Plant and Equipment [Line Items]

Proceeds from Sale of Property, Plant, and Equipment

$ 3,441

GSL Nicoletta [Member]

Property, Plant and Equipment [Line Items]

Vessel delivery date

Feb. 21, 2020

Year built

2002

Capacity in TEUs

6,840

Vessel acquisition cost

$ 12,660

GSL Christen [Member]

Property, Plant and Equipment [Line Items]

Vessel delivery date

Jan. 29, 2020

Year built

2002

Capacity in TEUs

6,840

Vessel acquisition cost

$ 13,000

GSL Matisse And Utrillo [Member]

Property, Plant and Equipment [Line Items]

Vessel impairment losses

$ 912

$ 7,585

$ 8,497

GSL Matisse And Utrillo [Member] | Unamortized Drydocking Costs [Member]

Property, Plant and Equipment [Line Items]

Vessel impairment losses

$ 38

Seven Vessels [Member]

Property, Plant and Equipment [Line Items]

Capacity in TEUs

6,000

Vessel acquisition cost

$ 116,000

Twelve Vessels [Member]

Property, Plant and Equipment [Line Items]

Vessel acquisition cost

$ 233,890

Advances for vessels acquisitions and other additions

$ 25,817

Long-Term Debt - Schedule of Lo

Long-Term Debt - Schedule of Long-Term Debt (Table) (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Jan. 01, 2021	Dec. 31, 2020	Dec. 31, 2019
Line of Credit Facility [Line Items]
Total borrowings	$ 835,373		$ 781,939
Total Sale and Leaseback Agreements	68,735		0
Less: Current portion of long-term debt	(95,312)		(76,681)
Less: Current portion of Sale and Leaseback Agreements (m, n)	(11,275)		0
Less: Original issue premium/(discount) of 2024 Notes (f)	14,162	$ 11,203	11,203	$ 14,095
Less: Deferred financing costs (p)	(14,162)	$ (11,203)	(11,203)	$ (14,095)
Non-current portion of Long-Term Debt	726,008		692,775
Sale and Leaseback Agreement CMBFL – $54,000 (m) [Member]
Line of Credit Facility [Line Items]
Outstanding amount	54,000		0
Sale and Leaseback Agreement – Neptune $14,735 (n) [Member]
Line of Credit Facility [Line Items]
Outstanding amount	14,735		0
Line of Credit [Member]
Line of Credit Facility [Line Items]
Total borrowings	766,638		781,939
Long-term Debt [Member]
Line of Credit Facility [Line Items]
Less: Current portion of long-term debt	(84,037)		(50,441)
2022 Notes (l) [Member]
Line of Credit Facility [Line Items]
Notes	0		233,436
2022 Notes	233,436		322,723
Less redemptions and repurchase	(233,436)		(89,287)
Less: Current portion of 2022 Notes (l)	0		(26,240)
Less: Original issue discount of 2022 Notes (l)	0		1,333
Less: Original issue discount of 2022 Notes (l)	0		(1,333)
2024 Notes (f) [Member]
Line of Credit Facility [Line Items]
Less: Original issue premium/(discount) of 2024 Notes (f)	109		147
Less: Deferred financing costs (p)	(109)		(147)
Deutsche Credit Facility (a) [Member]
Line of Credit Facility [Line Items]
Outstanding amount	51,670		0
HCOB Credit Facility (b) [Member]
Line of Credit Facility [Line Items]
Outstanding amount	53,500		0
CACIB, Bank Sinopac, CTBC Credit Facility (c) [Member]
Line of Credit Facility [Line Items]
Outstanding amount	51,700		0
New Hayfin Credit Facility (d) [Member]
Line of Credit Facility [Line Items]
Outstanding amount	217,249		0
Chailease Credit Facility (e) [Member]
Line of Credit Facility [Line Items]
Outstanding amount	6,660		7,596
2024 Notes (f) [Member]
Line of Credit Facility [Line Items]
Notes	82,521		59,819
Syndicated Senior Secured Credit Facility (CACIB, ABN, CIT, Siemens, CTBC, Bank Sinopac, Palatine) (g) [Member]
Line of Credit Facility [Line Items]
Outstanding amount	225,600		238,000
Blue Ocean Junior Credit Facility (g, h) [Member]
Line of Credit Facility [Line Items]
Outstanding amount	26,205		38,500
Hellenic Bank Credit Facility (i) [Member]
Line of Credit Facility [Line Items]
Outstanding amount	45,700		49,700
Deutsche,CIT,Entrust,Blue Ocean Credit Facility (j) [Member]
Line of Credit Facility [Line Items]
Outstanding amount	0		149,055
Hayfin Credit Facility (k) [Member]
Line of Credit Facility [Line Items]
Outstanding amount	$ 5,833		$ 5,833

Long-Term Debt - Repayment sche

Long-Term Debt - Repayment schedule (Table) (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Debt Disclosure [Abstract]
June 30, 2022	$ 95,312
June 30, 2023	100,936
June 30, 2024	93,939
June 30, 2025	335,495
June 30, 2026 and thereafter	209,691
Total	$ 835,373	$ 781,939

Long-Term Debt - Schedule of De

Long-Term Debt - Schedule of Deferred Financing Costs (Table) (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2021	Dec. 31, 2020
Debt Disclosure [Abstract]
Opening balance	$ 11,203	$ 14,095
Expenditures in the period	8,322	1,193
Amortization included within interest expense	(5,363)	(4,085)
Closing balance	$ 14,162	$ 11,203

Long-Term Debt (Details Narrati

Long-Term Debt (Details Narrative)

1 Months Ended

3 Months Ended

4 Months Ended

5 Months Ended

6 Months Ended

8 Months Ended

9 Months Ended

10 Months Ended

12 Months Ended

Jan. 20, 2021USD ($)

Feb. 10, 2020USD ($)

Apr. 13, 2021USD ($)

May 06, 2021USD ($)

May 31, 2021USD ($)

May 24, 2019USD ($)

Jun. 30, 2021USD ($)

Jun. 30, 2020USD ($)

Sep. 04, 2019USD ($)

Sep. 10, 2018USD ($)

Oct. 03, 2019USD ($)

Sep. 24, 2019USD ($)

Nov. 09, 2019USD ($)

Oct. 31, 2017USD ($)

Dec. 31, 2020USD ($)

May 20, 2021USD ($)

May 12, 2021USD ($)

Nov. 27, 2019USD ($)

Nov. 19, 2019USD ($)

Sep. 19, 2019USD ($)

Dec. 31, 2018USD ($)

Line of Credit Facility [Line Items]

Proceeds From Lines of Credit

$ 461,805,000

$ 47,000,000

Repayments of Debt

143,799,000

$ 44,366,000

Long-term Debt

$ 835,373,000

$ 781,939,000

Number of vessels owned

65

Date of delivery

third and fourth quarter 2021

Fees and related costs deferred

$ 8,322,000

1,193,000

Debt Instrument, Covenant Description

Amounts drawn under the facilities listed above are secured by first priority mortgages on certain of the Company’s vessels and other collateral. The credit facilities contain a number of restrictive covenants that limit the Company from, among other things: incurring or guaranteeing indebtedness; charging, pledging or encumbering the vessels; and changing the flag, class, management or ownership of the vessel owning entities. The credit facilities also require the vessels to comply with the ISM Code and ISPS Code and to maintain valid safety management certificates and documents of compliance at all times. Additionally, specific credit facilities require compliance with a number of financial covenants including asset cover ratios and minimum liquidity and corporate guarantor requirements. Among other events, it will be an event of default under the credit facilities if the financial covenants are not complied with, or remedied.

Debt Instrument, Covenant Compliance

As of June 30, 2021, and December 31, 2020, the Company was in compliance with its debt covenants.

Sale and Leaseback Agreement CMBFL – $54,000 (m) [Member]

Line of Credit Facility [Line Items]

Outstanding amount

$ 54,000,000

0

$54.0 Million Sale and Leaseback agreement - CMBFL [Member]

Line of Credit Facility [Line Items]

Outstanding amount

$ 54,000,000

Line of Credit Facility, Interest Rate Description

LIBOR plus a margin

Loan margin percentage

3.25%

Sale Leaseback Transaction, Date

May 20, 2021

Finance Lease, Liability

$ 54,000,000

Finance Lease Liability, Maturity date

Jun. 30, 2022

Finance Lease Liability Periodic Payment Terms, Balloon Payment to be Paid

$ 19,980,000

Sale Leaseback Transaction, Net Proceeds, Financing Activities

$ 54,000,000

Fees and related costs deferred

945,000

Sale and Leaseback Agreement – Neptune $14,735 (n) [Member]

Line of Credit Facility [Line Items]

Outstanding amount

$ 14,735,000

$ 0

Finance Lease Liability, Maturity Date

May 2028

$14.7 Million Sale and Leaseback agreement – Neptune Maritime Leasing [Member]

Line of Credit Facility [Line Items]

Outstanding amount

$ 14,735,000

Line of Credit Facility, Interest Rate Description

LIBOR plus a margin

Loan margin percentage

4.64%

Sale Leaseback Transaction, Date

May 12, 2021

Finance Lease, Liability

$ 14,735,000

Finance Lease Liability Periodic Payment Terms, Balloon Payment to be Paid

$ 950,000

Finance Lease Liability, Maturity Date

February 2026

Sale Leaseback Transaction, Net Proceeds, Financing Activities

$ 14,735,000

Date of delivery

April 2021

8.00% Senior Unsecured Notes Due 2024 [Member]

Line of Credit Facility [Line Items]

Issuance date of debt instrument

Nov. 19, 2019

Issuance of notes

$ 4,125,000

$ 27,500,000

Debt instrument, interest rate

8.00%

Debt instrument, maturity date

Dec. 31, 2024

Interest on notes

Interest on the 2024 Notes is payable on the last day of February, May, August and November of each year

Date of first required payment

Feb. 29, 2020

Notes Payable, Fair Value Disclosure

$ 82,521,000

Long-term Debt

$ 82,630,000

9.875 % First Priority Secured Notes Due 2022 [Member]

Line of Credit Facility [Line Items]

Issuance date of debt instrument

Oct. 31, 2017

Issuance of notes

$ 360,000,000

Debt instrument, interest rate

9.875%

Debt instrument, maturity date

Nov. 15, 2022

Interest on notes

Interest on the 2022 Notes was payable semi-annually on May 15 and November 15 of each year

Debt Instrument, Redemption Price, Percentage

102.469%

104.938%

98.98%

Proceeds from Issuance of Secured Debt

$ 356,400,000

Redemption period end date

January 2021

Number of vessels secured to notes

16

Number of vessels owned

16

Debt Instrument, Repurchased Face Amount

$ 233,436,000

$ 46,000,000

$ 15,287,000

Debt Instrument, Repurchase Amount

239,200,000

48,271,000

Gain (Loss) on Extinguishment of Debt

$ 10,642,000

2024 Notes (f) [Member]

Line of Credit Facility [Line Items]

Fees and related costs deferred

$ 413,000

776,000

On or after December 31, 2021 and prior to December 31, 2022 [Member] | 8.00% Senior Unsecured Notes Due 2024 [Member]

Line of Credit Facility [Line Items]

Debt Instrument, Redemption Price, Percentage

102.00%

On or after December 31, 2022 and prior to December 31, 2023 [Member] | 8.00% Senior Unsecured Notes Due 2024 [Member]

Line of Credit Facility [Line Items]

Debt Instrument, Redemption Price, Percentage

101.00%

On or after December 31, 2023 and prior to maturity [Member] | 8.00% Senior Unsecured Notes Due 2024 [Member]

Line of Credit Facility [Line Items]

Debt Instrument, Redemption Price, Percentage

100.00%

Eight Instalments [Member] | $54.0 Million Sale and Leaseback agreement - CMBFL [Member]

Line of Credit Facility [Line Items]

Repayment installments

8

Sale Leaseback Transaction, Quarterly Rental Payments

$ 2,025,000

Twenty Instalments [Member] | $54.0 Million Sale and Leaseback agreement - CMBFL [Member]

Line of Credit Facility [Line Items]

Repayment installments

20

Sale Leaseback Transaction, Quarterly Rental Payments

$ 891,000

Fifteen Instalments [Member] | $14.7 Million Sale and Leaseback agreement – Neptune Maritime Leasing [Member]

Line of Credit Facility [Line Items]

Repayment installments

15

Sale Leaseback Transaction, Quarterly Rental Payments

$ 793.87

Four Instalments [Member] | $14.7 Million Sale and Leaseback agreement – Neptune Maritime Leasing [Member]

Line of Credit Facility [Line Items]

Repayment installments

4

Sale Leaseback Transaction, Quarterly Rental Payments

$ 469.12

First of the three tranches of $180,500 Credit Facility [Member]

Line of Credit Facility [Line Items]

Line of Credit Facility, Expiration Date

Jun. 30, 2022

Outstanding amount

$ 48,527,000

Second of the three tranches of $180,500 Credit Facility [Member]

Line of Credit Facility [Line Items]

Line of Credit Facility, Expiration Date

Jun. 30, 2022

Outstanding amount

$ 48,648,000

Existing Credit Facilities [Member]

Line of Credit Facility [Line Items]

Outstanding amount

$ 224,310,000

Line of Credit Facility, Expiration Date

December 2020

$51.7 Million Deutsche Bank AG Credit Facility [Member]

Line of Credit Facility [Line Items]

Issuance date of debt instrument

May 6, 2021

Line of credit facility maximum borrowing capacity

$ 51,670,000

Outstanding amount

$ 51,670,000

Line of Credit Facility, Number of Repayment Installments

20

Line of Credit Facility, Frequency of Payments

quarterly

Line of Credit Facility, Periodic Payment

$ 1,162.45

Debt Instrument, Periodic Payment Terms, Balloon Payment to be Paid

$ 28,421,000

Line of Credit Facility, Interest Rate Description

LIBOR plus a margin

Loan margin percentage

3.25%

Fees and related costs deferred

$ 777,000

$64.2 Million Hamburg Commercial Bank AG Credit Facility [Member]

Line of Credit Facility [Line Items]

Issuance date of debt instrument

Apr. 15, 2021

Line of credit facility maximum borrowing capacity

$ 64,200,000

Outstanding amount

$ 53,500,000

Line of Credit Facility, Interest Rate Description

LIBOR plus a margin

Loan margin percentage

3.50%

Vessels financed

Seven

Proceeds From Lines of Credit

$ 53,500,000

Fees and related costs deferred

$ 963,000

$64.2 Million Hamburg Commercial Bank AG Credit Facility [Member] | Each Tranche [Member]

Line of Credit Facility [Line Items]

Line of Credit Facility, Number of Repayment Installments

16

Line of Credit Facility, Frequency of Payments

quarterly

Line of Credit Facility, Periodic Payment

$ 668,750

$51.7 Million CACIB, Bank Sinopac, CTBC Credit Facility [Member]

Line of Credit Facility [Line Items]

Issuance date of debt instrument

Apr. 13, 2021

Line of credit facility maximum borrowing capacity

$ 51,700,000

Outstanding amount

$ 51,700,000

Line of Credit Facility, Number of Repayment Installments

20

Line of Credit Facility, Frequency of Payments

quarterly

Line of Credit Facility, Periodic Payment

$ 1,275,000

Debt Instrument, Periodic Payment Terms, Balloon Payment to be Paid

$ 26,200,000

Line of Credit Facility, Interest Rate Description

LIBOR plus a margin

Loan margin percentage

2.75%

Fees and related costs deferred

$ 191,000

$236.2 Million Senior secured loan facility with Hayfin Management, LLP [Member]

Line of Credit Facility [Line Items]

Issuance date of debt instrument

Jan. 7, 2021

Line of credit facility maximum borrowing capacity

$ 236,200,000

Outstanding amount

$ 217,249,000

Line of Credit Facility, Number of Repayment Installments

20

Line of Credit Facility, Frequency of Payments

quarterly

Line of Credit Facility, Periodic Payment

$ 6,560,000

Line of Credit Facility, Interest Rate Description

LIBOR plus a margin

Loan margin percentage

7.00%

Repayments of Debt

$ 5,831,000

Fees and related costs deferred

$ 4,049,000

$9.0 Million Chailease Credit Facility [Member]

Line of Credit Facility [Line Items]

Issuance date of debt instrument

Feb. 26, 2020

Line of credit facility maximum borrowing capacity

$ 9,000,000

Outstanding amount

$ 6,660,000

Line of Credit Facility, Interest Rate Description

LIBOR plus a margin

Loan margin percentage

4.20%

Fees and related costs deferred

320,000

$9.0 Million Chailease Credit Facility [Member] | 36 Installments [Member]

Line of Credit Facility [Line Items]

Line of Credit Facility, Frequency of Payments

monthly

Line of Credit Facility, Periodic Payment

$ 156,000

$9.0 Million Chailease Credit Facility [Member] | 24 Installments [Member]

Line of Credit Facility [Line Items]

Line of Credit Facility, Frequency of Payments

monthly

Line of Credit Facility, Periodic Payment

$ 86,000

Debt Instrument, Periodic Payment Terms, Balloon Payment to be Paid

1,314,000

At Market Issuance Sales Agreement [Member] | 8.00% Senior Unsecured Notes Due 2024 [Member]

Line of Credit Facility [Line Items]

Notes Payable, Fair Value Disclosure

$ 50,895,000

$268.0 Million Syndicated Senior Secured Credit Facility [Member]

Line of Credit Facility [Line Items]

Issuance date of debt instrument

Sep. 19, 2019

Outstanding amount

$ 225,600,000

Line of Credit Facility, Interest Rate Description

LIBOR plus a margin of 3.00% and is payable at each quarter end date

Loan margin percentage

3.00%

Number of loan tranches

2

Fees and related costs deferred

67,000

$268.0 Million Syndicated Senior Secured Credit Facility [Member] | Tranche A [Member]

Line of Credit Facility [Line Items]

Line of Credit Facility, Expiration Date

Sep. 24, 2024

Line of Credit Facility, Number of Repayment Installments

20

Line of Credit Facility, Frequency of Payments

quarterly

Line of Credit Facility, Periodic Payment

$ 5,200,000

Debt Instrument, Periodic Payment Terms, Balloon Payment to be Paid

$ 126,000,000

Proceeds From Lines of Credit

$ 230,000,000

Line of Credit Facility, Date of First Required Payment

Dec. 12, 2019

$268.0 Million Syndicated Senior Secured Credit Facility [Member] | Tranche B [Member]

Line of Credit Facility [Line Items]

Line of Credit Facility, Expiration Date

Sep. 24, 2024

Line of Credit Facility, Number of Repayment Installments

20

Line of Credit Facility, Frequency of Payments

quarterly

Line of Credit Facility, Periodic Payment

$ 1,000,000

Debt Instrument, Periodic Payment Terms, Balloon Payment to be Paid

$ 18,000,000

Proceeds From Lines of Credit

$ 38,000,000

$38.5 Million Blue Ocean Junior Credit Facility [Member]

Line of Credit Facility [Line Items]

Issuance date of debt instrument

Sep. 19, 2019

Line of credit facility maximum borrowing capacity

$ 38,500,000

Line of Credit Facility, Expiration Date

Sep. 24, 2024

Outstanding amount

$ 26,205,000

Repayments of Debt

$ 12,295,000

Debt instrument, interest rate

10.00%

[custom:FeesOnRepaymentsOfDebt]

$ 1,617,000

Hellenic Bank Credit Facility (i) [Member]

Line of Credit Facility [Line Items]

Issuance date of debt instrument

May 23, 2019

Line of credit facility maximum borrowing capacity

$ 37,000,000

Outstanding amount

$ 45,700,000

49,700,000

Line of Credit Facility, Interest Rate Description

LIBOR plus a margin

Loan margin percentage

3.90%

Fees and related costs deferred

$ 30,000

Hellenic Bank Credit Facility (i) [Member] | Amended and restated loan agreement [Member]

Line of Credit Facility [Line Items]

Issuance date of debt instrument

Dec. 10, 2019

Line of credit facility maximum borrowing capacity

$ 22,000,000

Line of Credit Facility, Number of Repayment Installments

20

Line of Credit Facility, Frequency of Payments

quarterly

Line of Credit Facility, Periodic Payment

$ 375,000

Debt Instrument, Periodic Payment Terms, Balloon Payment to be Paid

$ 3,500,000

Number of loan tranches

2

Hellenic Bank Credit Facility (i) [Member] | Tranche A [Member]

Line of Credit Facility [Line Items]

Line of Credit Facility, Number of Repayment Installments

20

Line of Credit Facility, Frequency of Payments

quarterly

Line of Credit Facility, Periodic Payment

$ 450,000

Debt Instrument, Periodic Payment Terms, Balloon Payment to be Paid

$ 4,000,000

Proceeds From Lines of Credit

$ 13,000,000

Hellenic Bank Credit Facility (i) [Member] | Tranche B [Member]

Line of Credit Facility [Line Items]

Line of Credit Facility, Number of Repayment Installments

20

Line of Credit Facility, Frequency of Payments

quarterly

Line of Credit Facility, Periodic Payment

$ 400,000

Debt Instrument, Periodic Payment Terms, Balloon Payment to be Paid

$ 4,000,000

Proceeds From Lines of Credit

$ 12,000,000

Hellenic Bank Credit Facility (i) [Member] | Tranche C [Member]

Line of Credit Facility [Line Items]

Line of Credit Facility, Number of Repayment Installments

20

Line of Credit Facility, Frequency of Payments

quarterly

Line of Credit Facility, Periodic Payment

$ 400,000

Debt Instrument, Periodic Payment Terms, Balloon Payment to be Paid

$ 4,000,000

Proceeds From Lines of Credit

$ 12,000,000

Deutsche,CIT,Entrust,Blue Ocean Credit Facility [Member]

Line of Credit Facility [Line Items]

Issuance date of debt instrument

Nov. 9, 2018

Line of credit facility maximum borrowing capacity

$ 180,500,000

Line of Credit Facility, Expiration Date

Jun. 30, 2022

Proceeds From Lines of Credit

$ 180,500,000

Senior Facility [Member]

Line of Credit Facility [Line Items]

Line of credit facility maximum borrowing capacity

$ 141,900,000

Line of Credit Facility, Frequency of Payments

quarterly

Line of Credit Facility, Interest Rate Description

LIBOR

Loan margin percentage

3.00%

Number of loan tranches

3

Senior Facility [Member] | Sale and Leaseback Agreement CMBFL – $54,000 (m) [Member]

Line of Credit Facility [Line Items]

Sale Leaseback Transaction, Date

May 20, 2021

Finance Lease Liability, Maturity Date

Jun. 30, 2022

Senior Facility [Member] | $54.0 Million Sale and Leaseback agreement - CMBFL [Member]

Line of Credit Facility [Line Items]

Finance Lease, Liability

$ 54,000,000

Senior Facility [Member] | Tranche A [Member]

Line of Credit Facility [Line Items]

Line of Credit Facility, Number of Repayment Installments

14

Line of Credit Facility, Periodic Payment

$ 868,000

Debt Instrument, Periodic Payment Terms, Balloon Payment to be Paid

$ 35,148,000

Senior Facility [Member] | Tranche B [Member]

Line of Credit Facility [Line Items]

Line of Credit Facility, Number of Repayment Installments

14

Line of Credit Facility, Periodic Payment

$ 863,000

Debt Instrument, Periodic Payment Terms, Balloon Payment to be Paid

$ 35,218,000

Senior Facility [Member] | Tranche C [Member]

Line of Credit Facility [Line Items]

Line of Credit Facility, Number of Repayment Installments

14

Line of Credit Facility, Periodic Payment

$ 858,000

Debt Instrument, Periodic Payment Terms, Balloon Payment to be Paid

$ 35,288,000

Junior Facility [Member]

Line of Credit Facility [Line Items]

Line of credit facility maximum borrowing capacity

$ 38,600,000

Line of Credit Facility, Expiration Date

Jun. 30, 2022

Line of Credit Facility, Frequency of Payments

quarterly

Line of Credit Facility, Interest Rate Description

LIBOR

Loan margin percentage

10.00%

Debt Service Coverage Ratio (DSCR)

1.10:1

Junior Facility [Member] | Tranche A [Member]

Line of Credit Facility [Line Items]

Line of Credit Facility, Number of Repayment Installments

14

Line of Credit Facility, Periodic Payment

$ 236,000

Debt Instrument, Periodic Payment Terms, Balloon Payment to be Paid

$ 9,563,000

Junior Facility [Member] | Tranche B [Member]

Line of Credit Facility [Line Items]

Line of Credit Facility, Number of Repayment Installments

14

Line of Credit Facility, Periodic Payment

$ 235,000

Debt Instrument, Periodic Payment Terms, Balloon Payment to be Paid

$ 9,577,000

Junior Facility [Member] | Tranche C [Member]

Line of Credit Facility [Line Items]

Line of Credit Facility, Number of Repayment Installments

14

Line of Credit Facility, Periodic Payment

$ 233,000

Debt Instrument, Periodic Payment Terms, Balloon Payment to be Paid

9,604,000

New secured credit facility 1 [Member]

Line of Credit Facility [Line Items]

Issuance date of debt instrument

Apr. 13, 2021

Line of credit facility maximum borrowing capacity

$ 51,700,000

New secured credit facility 2 [Member]

Line of Credit Facility [Line Items]

Issuance date of debt instrument

May 6, 2021

Line of credit facility maximum borrowing capacity

$ 51,670,000

$65.0 Million Hayfin Secured Term Loan Facility [Member]

Line of Credit Facility [Line Items]

Line of credit facility maximum borrowing capacity

$ 65,000,000

Line of Credit Facility, Expiration Date

Jul. 16, 2022

Outstanding amount

$ 5,833,000

Line of Credit Facility, Frequency of Payments

each quarter end date

Line of Credit Facility, Interest Rate Description

LIBOR plus a margin

Loan margin percentage

5.50%

Line of Credit Facility, Initiation Date

Sep. 7, 2018

Line of Credit Facility, Unused Capacity, Commitment Fee Percentage

2.00%

$65.0 Million Hayfin Secured Term Loan Facility [Member] | Initial Tranche [Member]

Line of Credit Facility [Line Items]

Proceeds From Lines of Credit

$ 8,125,000

Related Party Transactions (Det

Related Party Transactions (Details Narrative) - USD ($) $ in Thousands	6 Months Ended		12 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020
Related Party Transaction [Line Items]
Due from related parties	$ 2,007		$ 1,472
Due to related parties	312		$ 225
Time charter and voyage expenses-related parties	$ 1,470	$ 1,201
CMA CGM [Member]
Related Party Transaction [Line Items]
Voting interest	8.40%		11.13%
Due from related parties	$ 1,098		$ 2,118
Technomar [Member]
Related Party Transaction [Line Items]
Due from related parties	899		184
Management fees	6,868	6,105
Due to related parties	0		0
CMA Ships [Member]
Related Party Transaction [Line Items]
Due from related parties	10		10
Conchart [Member]
Related Party Transaction [Line Items]
Due to related parties	312		$ 225
Time charter and voyage expenses-related parties	$ 1,470	$ 1,201

Commitments and Contingencies -

Commitments and Contingencies - Charter Hire Receivable (Table) (Details) $ in Thousands	Jun. 30, 2021USD ($)
Commitments and Contingencies Disclosure [Abstract]
June 30, 2022	$ 347,628
June 30, 2023	290,993
June 30, 2024	210,411
June 30, 2025	62,282
Thereafter	41,267
Total minimum lease revenue, net of address commissions	$ 952,581

Share Capital (Details Narrativ

Share Capital (Details Narrative) $ / shares in Units, $ in Thousands

1 Months Ended

2 Months Ended

3 Months Ended

4 Months Ended

6 Months Ended

7 Months Ended

8 Months Ended

12 Months Ended

Jan. 31, 2021shares

Jan. 26, 2021USD ($)$ / sharesshares

Feb. 17, 2021USD ($)shares

Mar. 31, 2021shares

Mar. 31, 2020shares

May 10, 2021USD ($)$ / shares

Apr. 30, 2021shares

Jun. 30, 2021USD ($)$ / sharesshares

Jul. 31, 2019shares

Aug. 20, 2014USD ($)shares

Dec. 31, 2020USD ($)shares

Dec. 31, 2019USD ($)shares

Apr. 13, 2021$ / sharesshares

Jan. 12, 2021$ / shares

Class of Stock [Line Items]

Classes of common stock

1

American Deposit Share [Member]

Class of Stock [Line Items]

Shares, Issued

1,395,005

839,442

42,756

Proceeds from Issuance of Redeemable Preferred Stock | $

$ 34,400

$ 18,847

$ 856

2019 Plan [Member] | Management [Member] | Incentive Stock [Member]

Class of Stock [Line Items]

Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized

1,421,000

January 2021 Equity Offering [Member]

Class of Stock [Line Items]

Stock Issued During Period, Shares, New Issues

5,400,000

141,959

Shares Issued, Price Per Share | $ / shares

$ 13

Proceeds from Issuance or Sale of Equity | $

$ 70,200

$ 67,758

Common Stock [Member]

Class of Stock [Line Items]

Number of restricted stock units issued during the period

45,313

45,313

184,270

Conversion of Stock, Shares Issued

12,955,188

Common Class A [Member]

Class of Stock [Line Items]

Dividends Payable, Amount Per Share | $ / shares

$ 0.25

$ 0.12

Common Stock, Shares, Outstanding

36,283,468

17,741,008

Dividends Payable, Date to be Paid

Jun. 3, 2021

Dividends Payable, Date of Record

May 24, 2021

Dividends | $

$ 9,347

Common Class A [Member] | 2019 Plan [Member]

Class of Stock [Line Items]

Number of restricted stock units issued during the period

45,313

Common Class A [Member] | 2019 Plan [Member] | Management [Member]

Class of Stock [Line Items]

Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized

1,812,500

Common Class A [Member] | 2019 Plan [Member] | Management [Member] | Incentive Stock [Member]

Class of Stock [Line Items]

Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period

61,625

61,625

Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized

1,421,000

Common Class A [Member] | Kelso [Member]

Class of Stock [Line Items]

Conversion of Stock, Shares Issued

12,955,188

Common Class A [Member] | Kelso and Maas Capital Investments [Member]

Class of Stock [Line Items]

Number of shares sold

5,175,000

Price per share | $ / shares

$ 12.50

Series C Preferred Stock [Member]

Class of Stock [Line Items]

Preferred Stock, Shares Outstanding

0

250,000

Series C Preferred Stock [Member] | Kelso [Member]

Class of Stock [Line Items]

Conversion of Stock, Shares Converted

250,000

Series B Preferred Stock [Member]

Class of Stock [Line Items]

Preferred Stock, Shares Outstanding

36,772

22,822

Proceeds from Issuance of Redeemable Preferred Stock | $

$ 33,497

Preferred shares issuance term description

On August 20, 2014, the Company issued 1,400,000 Series B Preferred Shares. The net proceeds from the offering were $33,497. Dividends are payable at 8.75% per annum in arrears on a quarterly basis.

Depositary shares issued

1,400,000

Preferred Stock, Dividend Rate, Percentage

8.75%

Preferred Stock, Redemption Terms

At any time after August 20, 2019 (or within 180 days after the occurrence of a fundamental change), the Series B Preferred Shares may be redeemed, at the discretion of the Company, in whole or in part, at a redemption price of $2,500.00 per share (equivalent to $25.00 per depositary share).

Preferred Stock, Redemption Price Per Share | $ / shares

$ 2,500

Redemption price per depositary share | $ / shares

$ 25

Series B Preferred Stock [Member] | American Deposit Share [Member]

Class of Stock [Line Items]

Preferred Stock, Shares Outstanding

1,395

8,394

428

Share-Based Compensation - Summ

Share-Based Compensation - Summary of Share, Based Awards (Table) (Details) - $ / shares	3 Months Ended	6 Months Ended	12 Months Ended
	Mar. 31, 2021	Jun. 30, 2021	Dec. 31, 2020	Dec. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unvested, Weighted Average Fair Value on Grant Date, Opening balance	$ 3.79	$ 3.79	$ 3.79
Granted, Weighted Average Fair Value on Grant Date		11.72
Vested, Actual Fair Value on Vesting Date		3.83	4.45
Unvested, Weighted Average Fair Value on Grant Date, Closing balance		$ 5.08	$ 3.79	$ 3.79
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unvested, Number of Units, Opening balance	928,908	928,908	1,246,096
Granted on March 11, 2021, Number of Units		61,625
Vested in 2020, Number of Units	(931,320)	(931,320)	(317,188)	(113,279)
Unvested, Number of Units, Closing balance		59,213	928,908	1,246,096

Share-Based Compensation (Detai

Share-Based Compensation (Details Narrative) $ / shares in Units, $ in Thousands	1 Months Ended	3 Months Ended	4 Months Ended	6 Months Ended		7 Months Ended	12 Months Ended
	Jan. 31, 2021shares	Mar. 31, 2021shares	Apr. 30, 2021shares	Jun. 30, 2021USD ($)$ / sharesshares	Jun. 30, 2020USD ($)	Jul. 31, 2019shares	Dec. 31, 2020shares	Dec. 31, 2019shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Payment Arrangement, Noncash Expense | $				$ 1,854	$ 1,282
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation, Grants in Period				61,625
Vested, Number of units		931,320		931,320			317,188	113,279
Common Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vested, Number of units				1,361,787
Number of restricted stock units issued during the period			184,270
Stock Issued During Period, Shares, New Issues				229,583
2019 Plan [Member] | Management [Member] | Incentive Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum Number of shares granted in any one calendar year				1,421,000
Number of tranches				4
2019 Plan [Member] | Management [Member] | Minimum [Member] | Incentive Stock [Member] | Second Tranche [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share price | $ / shares				$ 8
Number of consecutive trading days				60 days
2019 Plan [Member] | Management [Member] | Minimum [Member] | Incentive Stock [Member] | Third Tranche [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share price | $ / shares				$ 11
Number of consecutive trading days				60 days
2019 Plan [Member] | Management [Member] | Minimum [Member] | Incentive Stock [Member] | Fourth Tranche [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share price | $ / shares				$ 14
Number of consecutive trading days				60 days
2019 Plan [Member] | Common Class A [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of restricted stock units issued during the period	45,313
2019 Plan [Member] | Common Class A [Member] | Management [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum Number of shares granted in any one calendar year				1,812,500
Term of Equity Incentive Plan				10 years
2019 Plan [Member] | Common Class A [Member] | Management [Member] | Incentive Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum Number of shares granted in any one calendar year				1,421,000
Share-based Compensation, Grants in Period				61,625		61,625
2019 Plan [Member] | Common Class A [Member] | Management [Member] | Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum Number of shares granted in any one calendar year				12,500
Maximum Value of shares granted in any one calendar year | $				$ 100,000

Earnings per Share (Table) (Det

Earnings per Share (Table) (Details) - USD ($) $ / shares in Units, $ in Thousands	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
Numerator:
Net income attributable to common shareholders	$ 34,224	$ 13,226
Undistributed income attributable to Series C participating preferred shares	0	(5,602)
Net income available to common shareholders, basic and diluted	34,224	7,624
Net income available to:
Class A, basic and diluted	34,224	7,624
Diluted earnings per share:
Undistributed income attributable to Series C participating preferred shares	0	5,602
Common Class A [Member]
Numerator:
Net income available to common shareholders, basic and diluted	34,224	7,624
Net income available to:
Class A, basic and diluted	$ 34,224	$ 7,624
Denominator:
Basic weighted average number of Series C Preferred shares outstanding, as converted	34,136,307	17,632,674
Plus weighted average number of RSUs with service conditions	31,786	97,954
Dilutive weighted average number of Series C Preferred shares outstanding, as converted	34,168,093	17,730,628
Basic earnings per share:
Basic earnings per share	$ 1	$ 0.43
Diluted earnings per share:
Diluted earnings per share	$ 1	$ 0.43
Series C Preferred Stock [Member]
Numerator:
Undistributed income attributable to Series C participating preferred shares	$ 0	$ (5,602)
Denominator:
Basic weighted average number of Series C Preferred shares outstanding, as converted	0	12,955,188
Plus weighted average number of RSUs with service conditions	0	71,970
Dilutive weighted average number of Series C Preferred shares outstanding, as converted	0	13,027,157
Basic earnings per share:
Basic earnings per share		$ 0.43
Diluted earnings per share:
Diluted earnings per share		$ 0.43
Undistributed income attributable to Series C participating preferred shares	$ 0	$ 5,602

Earnings per Share (Details Nar

Earnings per Share (Details Narrative) - shares	Jun. 30, 2021	Dec. 31, 2020	Jun. 30, 2020	Dec. 31, 2019
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unvested restricted stock units	59,213	928,908	985,549	1,246,096

Subsequent events (Details Narr

Subsequent events (Details Narrative) - USD ($) $ / shares in Units, $ in Thousands	1 Months Ended	4 Months Ended	6 Months Ended			7 Months Ended
	Feb. 09, 2021	May 10, 2021	Jun. 30, 2021	Jun. 28, 2021	Jun. 30, 2020	Aug. 05, 2021	Jul. 31, 2021	Jan. 12, 2021	Dec. 31, 2020
Subsequent Event [Line Items]
Vessel delivery date			third and fourth quarter 2021
Proceeds from Lines of Credit			$ 461,805		$ 47,000
GSL MYNY [Member]
Subsequent Event [Line Items]
Vessel delivery date			July 28, 2021
Seven Vessels [Member]
Subsequent Event [Line Items]
Aggregate purchase price	$ 116,000
Proceeds from Lines of Credit			$ 64,200
Twelve Vessels [Member]
Subsequent Event [Line Items]
Vessel delivery date			July 15, 2021 and 29, 2021
Aggregate purchase price				$ 233,890
Four Vessels [Member]
Subsequent Event [Line Items]
Vessel delivery date			during the third and fourth quarter of 2021
Aggregate purchase price			$ 148,000
Series C Preferred Stock [Member]
Subsequent Event [Line Items]
Preferred Stock, Shares Issued			0						250,000
Common Class A [Member]
Subsequent Event [Line Items]
Dividends Payable, Amount Per Share		$ 0.25						$ 0.12
Dividends Payable, Date to be Paid		Jun. 3, 2021
Dividends Payable, Date of Record		May 24, 2021
HCOB and Credit Agricole [Member]
Subsequent Event [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity							$ 140,000
Subsequent Event [Member] | Four Vessels [Member]
Subsequent Event [Line Items]
Payments for advances						$ 14,800
Subsequent Event [Member] | Common Class A [Member]
Subsequent Event [Line Items]
Dividends Payable, Amount Per Share						$ 0.25
Dividends Payable, Date to be Paid						Sep. 3, 2021
Dividends Payable, Date of Record						Aug. 23, 2021
Subsequent Event [Member] | At Market Issuance Sales Agreement [Member] | Series C Preferred Stock [Member]
Subsequent Event [Line Items]
Preferred Stock, Shares Issued						257,709
Net proceeds from issuance						$ 6,400