Danaos (DAC) 6-K 6 Aug 24 2024 Q2 Current report (foreign) Financial data

Document and Entity Information

Document and Entity Information	6 Months Ended
	Jun. 30, 2024
Document and Entity Information
Entity Registrant Name	Danaos Corp
Entity Central Index Key	0001369241
Document Type	6-K
Document Period End Date	Jun. 30, 2024
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2024
Document Fiscal Period Focus	Q2

CONDENSED CONSOLIDATED BALANCE

CONDENSED CONSOLIDATED BALANCE SHEETS (unaudited) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
CURRENT ASSETS
Cash and cash equivalents	$ 372,446	$ 271,809
Accounts receivable, net	22,726	9,931
Inventories	21,909	24,511
Prepaid expenses	1,868	1,915
Due from related parties	$ 46,795	$ 51,431
Other Receivable, after Allowance for Credit Loss, Current, Related Party, Type [Extensible Enumeration]	Related Party [Member]	Related Party [Member]
Other current assets	$ 152,375	$ 142,173
Total current assets	618,119	501,770
NON-CURRENT ASSETS
Fixed assets at cost, net of accumulated depreciation of $1,379,877 (2023: $1,311,689)	3,028,236	2,746,541
Advances for vessels acquisition and vessels under construction	283,260	301,916
Deferred charges, net	39,546	38,012
Investments in affiliates	64	270
Other non-current assets	77,132	72,627
Total non-current assets	3,428,238	3,159,366
Total assets	4,046,357	3,661,136
CURRENT LIABILITIES
Accounts payable	23,565	22,820
Accrued liabilities	24,639	20,458
Current portion of long-term debt, net	25,160	21,300
Unearned revenue	51,528	63,823
Other current liabilities	22,856	39,759
Total current liabilities	147,748	168,160
LONG-TERM LIABILITIES
Long-term debt, net	544,543	382,874
Unearned revenue, net of current portion	38,753	60,134
Other long-term liabilities	38,095	33,651
Total long-term liabilities	621,391	476,659
Total liabilities	769,139	644,819
Commitments and Contingencies
STOCKHOLDERS' EQUITY
Preferred stock (par value $0.01, 100,000,000 preferred shares authorized and not issued as of June 30, 2024 and December 31, 2023)
Common stock (par value $0.01, 750,000,000 common shares authorized as of June 30, 2024 and December 31, 2023. 25,355,973 and 25,355,962 shares issued as of June 30, 2024 and December 31, 2023; and 19,345,643 and 19,418,696 shares outstanding as of June 30, 2024 and December 31, 2023)	193	194
Additional paid-in capital	688,122	690,190
Accumulated other comprehensive loss	(73,647)	(75,979)
Retained earnings	2,662,550	2,401,912
Total stockholders' equity	3,277,218	3,016,317
Total liabilities and stockholders' equity	$ 4,046,357	$ 3,661,136

CONDENSED CONSOLIDATED BALANC_2

CONDENSED CONSOLIDATED BALANCE SHEETS (unaudited) (Parenthetical) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
CONDENSED CONSOLIDATED BALANCE SHEETS (unaudited)
Accumulated depreciation	$ 1,379,877	$ 1,311,689
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized	100,000,000	100,000,000
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized	750,000,000	750,000,000
Common stock, shares issued	25,355,973	25,355,962
Common stock, shares outstanding	19,345,643	19,418,696

CONDENSED CONSOLIDATED STATEMEN

CONDENSED CONSOLIDATED STATEMENTS OF INCOME (unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
CONDENSED CONSOLIDATED STATEMENTS OF INCOME (unaudited)
OPERATING REVENUES	$ 246,306	$ 241,479	$ 499,755	$ 485,053
OPERATING EXPENSES
Voyage expenses	(12,678)	(8,399)	(33,020)	(16,282)
Vessel operating expenses	(47,090)	(41,861)	(90,204)	(82,500)
Depreciation	(35,380)	(31,910)	(69,243)	(63,439)
Amortization of deferred drydocking and special survey costs	(6,972)	(4,502)	(12,424)	(8,337)
General and administrative expenses	(11,297)	(7,192)	(21,541)	(14,037)
Net gain on disposal/sale of vessels	7,094		7,094	1,639
Income From Operations	139,983	147,615	280,417	302,097
OTHER INCOME (EXPENSES):
Interest income	2,923	3,596	5,859	6,319
Interest expense	(5,106)	(5,881)	(8,230)	(12,603)
Gain on investments	2,224	6,438	13,203	6,438
Dividend income	3,052		3,984
Loss on debt extinguishment		(2,254)		(2,254)
Equity loss on investments	(97)	(738)	(206)	(3,326)
Other finance expenses	(868)	(1,146)	(1,750)	(2,122)
Other income/(expenses), net	(56)	294	179	469
Loss on derivatives	(903)	(903)	(1,806)	(1,796)
Total Other Income/(Expenses), net	1,169	(594)	11,233	(8,875)
Net Income	$ 141,152	$ 147,021	$ 291,650	$ 293,222
EARNINGS PER SHARE
Basic earnings per share (in dollars per share)	$ 7.30	$ 7.32	$ 15.05	$ 14.51
Diluted earnings per share (in dollars per share)	$ 7.23	$ 7.32	$ 14.92	$ 14.51
Basic weighted average number of common shares	19,348	20,081	19,380	20,214
Diluted weighted average number of common shares	19,520	20,081	19,552	20,214

CONDENSED CONSOLIDATED STATEM_2

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (unaudited)
Net income for the period	$ 141,152	$ 147,021	$ 291,650	$ 293,222
Other comprehensive income:
Prior service cost of defined benefit plan	263	186	526	372
Amortization of deferred realized losses on cash flow hedges	903	903	1,806	1,796
Total Other Comprehensive Income	1,166	1,089	2,332	2,168
Comprehensive Income	$ 142,318	$ 148,110	$ 293,982	$ 295,390

CONDENSED CONSOLIDATED STATEM_3

CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY (unaudited) - USD ($) $ in Thousands	Common Stock	Additional paid-in capital	Accumulated other comprehensive loss	Retained earnings	Total
Balance at Dec. 31, 2022	$ 203	$ 748,109	$ (74,209)	$ 1,886,311	$ 2,560,414
Balance (in shares) at Dec. 31, 2022	20,350
Increase (Decrease) in Stockholders' Equity
Net Income				146,201	146,201
Dividends				(15,262)	(15,262)
Repurchase of common stock		(2,196)			(2,196)
Repurchase of common stock (in shares)	(41)
Issuance of common stock		1			1
Net movement in other comprehensive income			1,079		1,079
Balance at Mar. 31, 2023	$ 203	745,914	(73,130)	2,017,250	2,690,237
Balance (in shares) at Mar. 31, 2023	20,309
Balance at Dec. 31, 2022	$ 203	748,109	(74,209)	1,886,311	2,560,414
Balance (in shares) at Dec. 31, 2022	20,350
Increase (Decrease) in Stockholders' Equity
Net Income					293,222
Net movement in other comprehensive income					2,168
Balance at Jun. 30, 2023	$ 197	712,154	(72,041)	2,149,172	2,789,482
Balance (in shares) at Jun. 30, 2023	19,752
Balance at Dec. 31, 2022	$ 203	748,109	(74,209)	1,886,311	2,560,414
Balance (in shares) at Dec. 31, 2022	20,350
Balance at Dec. 31, 2023	$ 194	690,190	(75,979)	2,401,912	3,016,317
Balance (in shares) at Dec. 31, 2023	19,419
Balance at Mar. 31, 2023	$ 203	745,914	(73,130)	2,017,250	2,690,237
Balance (in shares) at Mar. 31, 2023	20,309
Increase (Decrease) in Stockholders' Equity
Net Income				147,021	147,021
Dividends				(15,099)	(15,099)
Repurchase of common stock	$ (6)	(33,760)			(33,766)
Repurchase of common stock (in shares)	(557)
Net movement in other comprehensive income			1,089		1,089
Balance at Jun. 30, 2023	$ 197	712,154	(72,041)	2,149,172	2,789,482
Balance (in shares) at Jun. 30, 2023	19,752
Balance at Dec. 31, 2023	$ 194	690,190	(75,979)	2,401,912	3,016,317
Balance (in shares) at Dec. 31, 2023	19,419
Increase (Decrease) in Stockholders' Equity
Net Income				150,498	150,498
Dividends				(15,535)	(15,535)
Repurchase of common stock		(4,132)			(4,132)
Repurchase of common stock (in shares)	(58)
Stock based compensation		1,576			1,576
Net movement in other comprehensive income			1,166		1,166
Balance at Mar. 31, 2024	$ 194	687,634	(74,813)	2,536,875	3,149,890
Balance (in shares) at Mar. 31, 2024	19,361
Balance at Dec. 31, 2023	$ 194	690,190	(75,979)	2,401,912	3,016,317
Balance (in shares) at Dec. 31, 2023	19,419
Increase (Decrease) in Stockholders' Equity
Net Income					291,650
Net movement in other comprehensive income					2,332
Balance at Jun. 30, 2024	$ 193	688,122	(73,647)	2,662,550	3,277,218
Balance (in shares) at Jun. 30, 2024	19,346
Balance at Mar. 31, 2024	$ 194	687,634	(74,813)	2,536,875	3,149,890
Balance (in shares) at Mar. 31, 2024	19,361
Increase (Decrease) in Stockholders' Equity
Net Income				141,152	141,152
Dividends				(15,477)	(15,477)
Repurchase of common stock	$ (1)	(1,090)			(1,091)
Repurchase of common stock (in shares)	(15)
Stock based compensation		1,577			1,577
Issuance of common stock		1			1
Net movement in other comprehensive income			1,166		1,166
Balance at Jun. 30, 2024	$ 193	$ 688,122	$ (73,647)	$ 2,662,550	$ 3,277,218
Balance (in shares) at Jun. 30, 2024	19,346

CONDENSED CONSOLIDATED STATEM_4

CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY (unaudited) (Parenthetical) - $ / shares	3 Months Ended				6 Months Ended
	Jun. 30, 2024	Mar. 31, 2024	Jun. 30, 2023	Mar. 31, 2023	Jun. 30, 2024	Jun. 30, 2023
CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY (unaudited)
Dividends (in US$ per share)	$ 0.80	$ 0.80	$ 0.75	$ 0.75	$ 0.80	$ 0.75

CONDENSED CONSOLIDATED STATEM_5

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023	Dec. 31, 2023
Cash Flows from Operating Activities
Net income			$ 291,650	$ 293,222
Adjustments to reconcile net income to net cash provided by operating activities
Depreciation	$ 35,380	$ 31,910	69,243	63,439
Amortization of deferred drydocking and special survey costs	6,972	4,502	12,424	8,337	$ 18,663
Amortization of assumed time charters			(4,534)	(12,390)
Amortization of finance costs			971	1,261
Gain on investments			(13,203)	(6,438)
Payments for drydocking and special survey costs deferred			(14,618)	(14,560)
Net gain on disposal/sale of vessels	(7,094)		(7,094)	(1,639)
Loss on debt extinguishment		2,254		2,254
Equity loss on investments	97	738	206	3,326
Prior service cost and periodic cost			715	886
Stock based compensation			3,153
Amortization of deferred realized losses on interest rate swaps			1,806	1,796
(Increase)/Decrease in
Accounts receivable			(12,795)	(2,456)
Inventories			2,602	77
Prepaid expenses			47	(1,323)
Due from related parties			4,636	1,090
Other assets, current and non-current			13,922	(12,250)
Increase/(Decrease) in
Accounts payable			1,586	(4,836)
Accrued liabilities			4,181	1,685
Unearned revenue, current and long-term			(29,142)	(38,078)
Other liabilities, current and long-term			(18,189)	(2,797)
Net Cash provided by Operating Activities			307,567	280,606
Cash Flows from Investing Activities
Vessels additions and advances			(341,855)	(29,784)
Net proceeds and insurance proceeds from disposal/sale of vessels			10,639	3,914
Investments in affiliates/marketable securities				(74,407)
Net Cash used in Investing Activities			(331,216)	(100,277)
Cash Flows from Financing Activities
Proceeds from long-term debt			181,000
Payments of long-term debt			(13,750)	(13,750)
Payments of leaseback obligation				(72,925)
Dividends paid			(31,011)	(30,361)
Repurchase of common stock			(5,223)	(35,738)
Finance costs			(6,730)	(1,892)
Net Cash provided by/(used in) Financing Activities			124,286	(154,666)
Net Increase in cash and cash equivalents			100,637	25,663
Cash and cash equivalents at beginning of period			271,809	267,668	267,668
Cash and cash equivalents at end of period	$ 372,446	$ 293,331	372,446	293,331	$ 271,809
Supplemental cash flow information:
Cash paid for interest, net of amounts capitalized			$ 5,322	$ 11,139

Basis of Presentation and Gener

Basis of Presentation and General Information	6 Months Ended
	Jun. 30, 2024
Basis of Presentation and General Information
Basis of Presentation and General Information	1 Basis of Presentation and General Information ​ The accompanying condensed consolidated financial statements (unaudited) have been prepared in conformity with accounting principles generally accepted in the United States of America (“U.S. GAAP”). The reporting and functional currency of Danaos Corporation and its subsidiaries (“Danaos” or the “Company”), is the United States Dollar. ​ Danaos Corporation, formerly Danaos Holdings Limited, was formed on December 7, 1998 under the laws of Liberia and is presently the sole owner of all outstanding shares of the companies listed below. Danaos Holdings Limited was redomiciled in the Marshall Islands on October 7, 2005. In connection with the redomiciliation, the Company changed its name to Danaos Corporation. On October 14, 2005, the Company filed and the Marshall Islands accepted Amended and Restated Articles of Incorporation. The authorized capital stock of Danaos Corporation is 750,000,000 shares of common stock with a par value of $0.01 and 100,000,000 shares of preferred stock with a par value of $0.01. Refer to Note 11, “Stockholders’ Equity”. The Company’s principal business is the acquisition and operation of vessels. Danaos conducts its operations through the vessel owning companies whose principal activity is the ownership and operation of container vessels and drybulk vessels that are under the exclusive management of a related party of the Company. ​ In the opinion of management, the accompanying condensed consolidated financial statements (unaudited) of Danaos and subsidiaries contain all adjustments necessary to state fairly, in all material respects, the Company’s condensed consolidated financial position as of June 30, 2024, the condensed consolidated results of operations for the three and six months ended June 30, 2024 and 2023 and the condensed consolidated cash flows for the six months ended June 30, 2024 and 2023. All such adjustments are deemed to be of a normal, recurring nature. These financial statements should be read in conjunction with the consolidated financial statements and related notes included in Danaos’ Annual Report on Form 20-F for the year ended December 31, 2023. The results of operations for the three and six months ended June 30, 2024, are not necessarily indicative of the results to be expected for the full year. The year-end condensed consolidated balance sheet data was derived from annual financial statements. These condensed consolidated financial statements do not include all disclosures required by accounting principles generally accepted in the United States of America. ​ The condensed consolidated financial statements (unaudited) have been prepared to reflect the consolidation of the companies listed below. The historical balance sheets and results of operations of the companies listed below have been reflected in the condensed consolidated balance sheets and condensed consolidated statements of income, comprehensive income, cash flows and stockholders’ equity at and for each period since their respective incorporation dates. ​ 1 Basis of Presentation and General Information (Continued) As of June 30, 2024, Danaos included the vessel owning companies (the “Danaos Subsidiaries”) of container vessels and drybulk vessels listed below: Container vessels: ​ ​ ​ ​ ​ ​ ​ ​ ​ Company Date of Incorporation Vessel Name Year Built TEU (1) Megacarrier (No. 1) Corp. ​ September 10, 2007 ​ Kota Peony (ex Hyundai Honour) ​ 2012 ​ 13,100 Megacarrier (No. 2) Corp. ​ September 10, 2007 ​ Kota Primrose (ex Hyundai Respect) ​ 2012 ​ 13,100 Megacarrier (No. 3) Corp. ​ September 10, 2007 ​ Kota Plumbago (ex Hyundai Smart) ​ 2012 ​ 13,100 Megacarrier (No. 4) Corp. ​ September 10, 2007 ​ Speed (ex Hyundai Speed) ​ 2012 ​ 13,100 Megacarrier (No. 5) Corp. ​ September 10, 2007 ​ Ambition (ex Hyundai Ambition) ​ 2012 ​ 13,100 CellContainer (No. 6) Corp. ​ October 31, 2007 ​ Express Berlin ​ 2011 ​ 10,100 CellContainer (No. 7) Corp. ​ October 31, 2007 ​ Express Rome ​ 2011 ​ 10,100 CellContainer (No. 8) Corp. ​ October 31, 2007 ​ Express Athens ​ 2011 ​ 10,100 Karlita Shipping Co. Ltd. ​ February 27, 2003 ​ Pusan C ​ 2006 ​ 9,580 Ramona Marine Co. Ltd. ​ February 27, 2003 ​ Le Havre ​ 2006 ​ 9,580 Oceancarrier (No. 2) Corp. ​ October 15, 2020 ​ Bremen ​ 2009 ​ 9,012 Oceancarrier (No. 3) Corp. ​ October 15, 2020 ​ C Hamburg ​ 2009 ​ 9,012 Blackwell Seaways Inc. ​ January 9, 2020 ​ Niledutch Lion ​ 2008 ​ 8,626 Oceancarrier (No.1) Corp. ​ February 19, 2020 ​ Kota Manzanillo ​ 2005 ​ 8,533 Springer Shipping Co. ​ April 29, 2019 ​ Belita ​ 2006 ​ 8,533 Teucarrier (No. 5) Corp. ​ September 17, 2007 ​ CMA CGM Melisande ​ 2012 ​ 8,530 Teucarrier (No. 1) Corp. ​ January 31, 2007 ​ CMA CGM Attila ​ 2011 ​ 8,530 Teucarrier (No. 2) Corp. ​ January 31, 2007 ​ CMA CGM Tancredi ​ 2011 ​ 8,530 Teucarrier (No. 3) Corp. ​ January 31, 2007 ​ CMA CGM Bianca ​ 2011 ​ 8,530 Teucarrier (No. 4) Corp. ​ January 31, 2007 ​ CMA CGM Samson ​ 2011 ​ 8,530 Oceanew Shipping Ltd. ​ January 14, 2002 ​ Europe ​ 2004 ​ 8,468 Oceanprize Navigation Ltd. ​ January 21, 2003 ​ America ​ 2004 ​ 8,468 Rewarding International Shipping Inc. ​ October 1, 2019 ​ Kota Santos ​ 2005 ​ 8,463 Teushipper (No. 1) Corp. ​ March 14, 2022 ​ Catherine C (4) ​ 2024 ​ 8,010 Teushipper (No. 2) Corp. ​ March 14, 2022 ​ Greenland (4) ​ 2024 ​ 8,010 Boxsail (No. 1) Corp. ​ March 4, 2022 ​ Interasia Accelerate (4) ​ 2024 ​ 7,165 Boxcarrier (No. 2) Corp. ​ June 27, 2006 ​ CMA CGM Musset ​ 2010 ​ 6,500 Boxcarrier (No. 3) Corp. ​ June 27, 2006 ​ CMA CGM Nerval ​ 2010 ​ 6,500 Boxcarrier (No. 4) Corp. ​ June 27, 2006 ​ CMA CGM Rabelais ​ 2010 ​ 6,500 Boxcarrier (No. 5) Corp. ​ June 27, 2006 ​ Racine ​ 2010 ​ 6,500 Boxcarrier (No. 1) Corp. ​ June 27, 2006 ​ CMA CGM Moliere ​ 2009 ​ 6,500 Expresscarrier (No. 1) Corp. ​ March 5, 2007 ​ YM Mandate ​ 2010 ​ 6,500 Expresscarrier (No. 2) Corp. ​ March 5, 2007 ​ YM Maturity ​ 2010 ​ 6,500 Actaea Company Limited ​ October 14, 2014 ​ Savannah (ex Zim Savannah) ​ 2002 ​ 6,402 Asteria Shipping Company Limited ​ October 14, 2014 ​ Dimitra C ​ 2002 ​ 6,402 Averto Shipping S.A. ​ June 12, 2015 ​ Suez Canal ​ 2002 ​ 5,610 Sinoi Marine Ltd. ​ June 12, 2015 ​ Kota Lima ​ 2002 ​ 5,544 Oceancarrier (No. 4) Corp. ​ July 6, 2021 ​ Wide Alpha ​ 2014 ​ 5,466 Oceancarrier (No. 5) Corp. ​ July 6, 2021 ​ Stephanie C ​ 2014 ​ 5,466 Oceancarrier (No. 6) Corp. ​ July 6, 2021 ​ Maersk Euphrates ​ 2014 ​ 5,466 Oceancarrier (No. 7) Corp. ​ July 6, 2021 ​ Wide Hotel ​ 2015 ​ 5,466 Oceancarrier (No. 8) Corp. ​ July 6, 2021 ​ Wide India ​ 2015 ​ 5,466 Oceancarrier (No. 9) Corp. ​ July 6, 2021 ​ Wide Juliet ​ 2015 ​ 5,466 Continent Marine Inc. ​ March 22, 2006 ​ Monaco (ex Zim Monaco) ​ 2009 ​ 4,253 Medsea Marine Inc. ​ May 8, 2006 ​ Dalian ​ 2009 ​ 4,253 Blacksea Marine Inc. ​ May 8, 2006 ​ Zim Luanda ​ 2009 ​ 4,253 Bayview Shipping Inc. ​ March 22, 2006 ​ Rio Grande ​ 2008 ​ 4,253 Channelview Marine Inc. ​ March 22, 2006 ​ Paolo ​ 2008 ​ 4,253 Balticsea Marine Inc. ​ March 22, 2006 ​ Kingston ​ 2008 ​ 4,253 Seacarriers Services Inc. ​ June 28, 2005 ​ Seattle C ​ 2007 ​ 4,253 Seacarriers Lines Inc. ​ June 28, 2005 ​ Vancouver ​ 2007 ​ 4,253 Containers Services Inc. ​ May 30, 2002 ​ Tongala ​ 2004 ​ 4,253 Containers Lines Inc. ​ May 30, 2002 ​ Derby D ​ 2004 ​ 4,253 Boulevard Shiptrade S.A ​ September 12, 2013 ​ Dimitris C ​ 2001 ​ 3,430 CellContainer (No. 4) Corp. ​ March 23, 2007 ​ Express Spain ​ 2011 ​ 3,400 CellContainer (No. 5) Corp. ​ March 23, 2007 ​ Express Black Sea ​ 2011 ​ 3,400 CellContainer (No. 1) Corp. ​ March 23, 2007 ​ Express Argentina ​ 2010 ​ 3,400 CellContainer (No. 2) Corp. ​ March 23, 2007 ​ Express Brazil ​ 2010 ​ 3,400 CellContainer (No. 3) Corp. ​ March 23, 2007 ​ Express France ​ 2010 ​ 3,400 Wellington Marine Inc. ​ January 27, 2005 ​ Singapore ​ 2004 ​ 3,314 Auckland Marine Inc. ​ January 27, 2005 ​ Colombo ​ 2004 ​ 3,314 Vilos Navigation Company Ltd. ​ May 30, 2013 ​ Zebra ​ 2001 ​ 2,602 Trindade Maritime Company ​ April 10, 2013 ​ Amalia C (2) ​ 1998 ​ 2,452 Sarond Shipping Inc. ​ January 18, 2013 ​ Artotina ​ 2001 ​ 2,524 Speedcarrier (No. 7) Corp. ​ December 6, 2007 ​ Highway ​ 1998 ​ 2,200 Speedcarrier (No. 6) Corp. ​ December 6, 2007 ​ Progress C ​ 1998 ​ 2,200 Speedcarrier (No. 8) Corp. ​ December 6, 2007 ​ Bridge ​ 1998 ​ 2,200 Speedcarrier (No. 1) Corp. ​ June 28, 2007 ​ Phoenix D ​ 1997 ​ 2,200 Speedcarrier (No. 2) Corp. ​ June 28, 2007 ​ Advance ​ 1997 ​ 2,200 Speedcarrier (No. 3) Corp. ​ June 28, 2007 ​ Stride (3) ​ 1997 ​ 2,200 Speedcarrier (No. 5) Corp. ​ June 28, 2007 ​ Future ​ 1997 ​ 2,200 Speedcarrier (No. 4) Corp. ​ June 28, 2007 ​ Sprinter ​ 1997 ​ 2,200 Vessels under construction ​ ​ ​ ​ ​ ​ ​ ​ Boxsail (No. 2) Corp. ​ March 4, 2022 ​ Hull No. C7100-8 ​ 2024 ​ 7,165 Teushipper (No. 3) Corp. ​ March 14, 2022 ​ Hull No. HN4011 ​ 2024 ​ 8,010 Teushipper (No. 4) Corp. ​ March 14, 2022 ​ Hull No. HN4012 ​ 2024 ​ 8,010 Boxsail (No. 3) Corp. ​ March 4, 2022 ​ Hull No. CV5900-07 ​ 2025 ​ 6,014 Boxsail (No. 4) Corp. ​ March 4, 2022 ​ Hull No. CV5900-08 ​ 2025 ​ 6,014 Boxline (No. 1) Corp. ​ June 7, 2023 ​ Hull No. YZJ2023-1556 ​ 2026 ​ 8,258 Boxline (No. 2) Corp. ​ June 7, 2023 ​ Hull No. YZJ2023-1557 ​ 2026 ​ 8,258 Boxline (No. 3) Corp. ​ February 2, 2024 ​ Hull No. YZJ2024-1612 ​ 2026 ​ 8,258 Boxline (No. 4) Corp. ​ February 2, 2024 ​ Hull No. YZJ2024-1613 ​ 2027 ​ 8,258 Boxline (No. 5) Corp. ​ March 8, 2024 ​ Hull No. YZJ2024-1625 ​ 2027 ​ 8,258 Boxline (No. 6) Corp. ​ March 8, 2024 ​ Hull No. YZJ2024-1626 ​ 2027 ​ 8,258 Boxline (No. 7) Corp. ​ May 30, 2024 ​ Hull No. YZJ2024-1668 ​ 2027 ​ 8,258 Boxsail (No. 5) Corp. ​ June 13, 2024 ​ Hull No. C9200-7 ​ 2027 ​ 9,200 Boxsail (No. 6) Corp. ​ June 13, 2024 ​ Hull No. C9200-8 ​ 2027 ​ 9,200 (1) Twenty-feet equivalent unit, the international standard measure for containers and container vessels capacity. 1 Basis of Presentation and Gopeneral Information (Continued) ​ (2) The sale of Amalia C was completed in January 2023. (3) The Stride was sold for scrap in March 2024. (4) The Interasia Accelerate, Greenland and Catherine C were delivered in the second quarter of 2024. ​ Capesize drybulk vessels: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Company Date of Incorporation Vessel Name Year Built DWT(1) Bulk No. 1 Corp. ​ July 14, 2023 Integrity 2010 175,996 Bulk No. 2 Corp. ​ July 14, 2023 Achievement 2011 175,850 Bulk No. 3 Corp. ​ July 14, 2023 Ingenuity 2011 176,022 Bulk No. 4 Corp. ​ July 14, 2023 ​ Genius 2012 175,580 Bulk No. 5 Corp. ​ July 14, 2023 Peace 2010 175,858 Bulk No. 6 Corp. ​ September 15, 2023 W Trader 2009 175,879 Bulk No. 7 Corp. ​ September 25, 2023 E Trader 2009 175,886 Bulk No. 9 Corp. ​ February 2, 2024 Gouverneur (ex Xin Hang) (2) 2010 178,043 Bulk No. 10 Corp. ​ February 15, 2024 Valentine (ex Star Audrey) (2) 2011 175,125 Contracted drybulk vessels ​ Bulk No. 8 Corp. ​ January 31, 2024 Danaos (ex Guo May) (3) 2011 176,536 (1) DWT, dead weight tons, the international standard measure for drybulk vessels capacity. (2) The vessels were delivered in the second quarter of 2024. (3) The vessel was delivered in July 2024. ​ Impact of the wars in Ukraine and Gaza on the Company’s Business ​ The current conflict between Russia and Ukraine, and related sanctions imposed by the U.S., EU and others, adversely affect the crewing operations of the Company’s Manager, which has crewing offices in St. Petersburg, Odessa and Mariupol (damaged by the war), and trade patterns involving ports in the Black Sea or Russia, and as well as impacting world energy supply and creating uncertainties in the global economy, which in turn impact containership and drybulk demand. The extent of the impact will depend largely on future developments. ​ The war between Israel and Hamas in the Gaza Strip, potential disruption of shipping routes such as Houthi attacks in the Red Sea and the Gulf of Aden, has not affected the Company’s business to date; however, an escalation of these conflicts could have reverberations on the regional and global economies that could have the potential to adversely affect demand for cargoes and the Company’s business.

Significant Accounting Policies

Significant Accounting Policies	6 Months Ended
	Jun. 30, 2024
Significant Accounting Policies
Significant Accounting Policies	2 Significant Accounting Policies ​ For a detailed discussion about the Company’s significant accounting policies, see Note 2 “Significant Accounting Policies” in the Company’s consolidated financial statements included in the Annual Report on Form 20-F for the year ended December 31, 2023 filed with the Securities and Exchange Commission on February 29, 2024. During the six months ended June 30, 2024, there were no significant changes made to the Company’s significant accounting policies. ​

Investments in Affiliates

Investments in Affiliates	6 Months Ended
	Jun. 30, 2024
Investments in Affiliates
Investments in Affiliates	3 Investments in Affiliates ​ In March 2023, the Company invested $4.3 million in the common shares of a newly established company Carbon Termination Technologies Corporation (“CTTC”), incorporated in the Republic of the Marshall Islands, which represents the Company’s 49% ownership interest. CTTC currently engages in research and development of decarbonization technologies for the shipping industry. Equity method of accounting is used for this investment. The Company’s share of CTTC’s initial expenses amounted to $0.2 million and $4.0 million and is presented under “Equity loss on investments” in the condensed consolidated statement of income in the six months ended June 30, 2024 and the period ended December 31, 2023, respectively.

Fixed Assets, Advances for Vess

Fixed Assets, Advances for Vessels Acquisition and Vessels under Construction	6 Months Ended
	Jun. 30, 2024
Fixed Assets, Advances for Vessels Acquisition and Vessels under Construction
Fixed Assets, net & Advances for Vessels under Construction	4 Fixed Assets, Advances for Vessels Acquisition and Vessels under Construction ​ In 2023, the Company acquired 7 Capesize bulk carriers built in 2009 through 2012 that aggregate to 1,231,157 DWT for a total purchase price of $139.6 million. In February 2024, the Company entered into agreements to acquire 3 Capesize bulk carriers built in 2010 through 2011 that aggregate 529,704 DWT for a total purchase price of $79.8 million, out of which $58.8 million was paid before June 30, 2024 and $21.0 million was paid in July 2024. Two of these vessels were delivered to the Company in the second quarter of 2024 and one in July 2024. ​ In April 2022, the Company entered into contracts for the construction of four 8,000 TEU container vessels, of which two were delivered to the Company in the second quarter of 2024 and two are expected to be delivered in the third quarter of 2024. In March 2022, the Company entered into contracts for the construction of two 7,100 TEU container vessels, out of which one was delivered to the Company from the shipyard in the second quarter of 2024 and one is expected to be delivered in the third quarter of 2024. In April 2023, the Company entered into contracts for the construction of two 6,000 TEU container vessels with expected vessels delivery in 2025. In June 2023, the Company entered into contracts for the construction of two 8,200 TEU container vessels with expected vessels delivery in 2026. In February and March 2024, the Company entered into contracts for the construction of four 8,200 TEU container vessels with expected vessels deliveries in 2026 through 2027. In June 2024, the Company entered into contracts for the construction of two 9,200 TEU container vessels and one 8,200 TEU container vessel with expected deliveries in 2027. As of June 30, 2024, the aggregate purchase price of the 14 remaining vessel construction contracts amounts to $1,245.9 million, out of which $90.2 million, $73.3 million and $88.6 million was paid in the six months ended June 30, 2024 and in the years ended December 31, 2023 and 2022, respectively. The contractual commitments under 14 remaining vessel construction contracts are analyzed as follows as of June 30, 2024 (in thousands): ​ ​ ​ ​ ​ Payments due by period ended ​ December 31, 2024 ​ $ 205,067 December 31, 2025 ​ 204,550 December 31, 2026 ​ 295,212 December 31, 2027 ​ 288,984 Total contractual commitments ​ $ 993,813 ​ Additionally, a supervision fee of $850 thousand per newbuilding vessel is payable to Danaos Shipping Company Limited (the “Manager”) over the construction period. Supervision fees totaling $2.1 million and $3.0 million were charged by the Manager and capitalized to the vessels under construction in the six months ended June 30, 2024 and in the year ended December 31, 2023, respectively. Interest expense amounting to $11.4 million, $17.4 million and $5.0 million was capitalized to the vessels under construction in the six months ended June 30, 2024 and in the years ended December 31, 2023 and 2022, respectively. In March 2024, the Company sold for scrap the vessel Stride, In December 2022, the Company entered into an agreement to sell the vessel Amalia C The Company assumed time charter liabilities related to its acquisition of vessels in the second half of 2021. The amortization of these assumed time charters amounted to $4.5 million and $6.5 million in the six months ended June 30, 2024 and June 30, 2023, respectively and is presented under “Operating revenues” in the condensed consolidated statement of income. The remaining unamortized amount of nil and $4.5 million is presented under current “Unearned revenue” in the condensed consolidated balance sheet as of June 30, 2024 and December 31, 2023, respectively. 4 Fixed Assets, net & Advances for Vessels under Construction (Continued) The residual value (estimated scrap value at the end of the vessels’ useful lives) of the fleet was estimated at $ 574.9 million and $ 540.5 million as of June 30, 2024 and as of December 31, 2023, respectively. The Company has calculated the residual value of the vessels taking into consideration the 10 year average and the 5 year average of the scrap prices. The Company has applied uniformly the scrap value of $300 per ton for all vessels. The Company believes that $300 per ton is a reasonable estimate of future scrap prices, taking into consideration the cyclicality of the nature of future demand for scrap steel. Although the Company believes that the assumptions used to determine the scrap rate are reasonable and appropriate, such assumptions are highly subjective, in part, because of the cyclical nature of future demand for scrap steel.

Deferred Charges, net

Deferred Charges, net	6 Months Ended
	Jun. 30, 2024
Deferred Charges, net
Deferred Charges, net	5 Deferred Charges, net ​ Deferred charges, net consisted of the following (in thousands): ​ ​ ​ ​ ​ ​ ​ Drydocking and ​ Special Survey Costs As of January 1, 2023 ​ $ 25,554 Additions ​ ​ 31,121 Amortization ​ (18,663) As of December 31, 2023 ​ ​ 38,012 Additions ​ 14,618 Amortization ​ (12,424) Write-off ​ ​ (660) As of June 30, 2024 ​ $ 39,546 ​ The Company follows the deferral method of accounting for drydocking and special survey costs in accordance with accounting for planned major maintenance activities, whereby actual costs incurred are deferred and amortized on a straight-line basis over the period until the next scheduled survey, which is two

Other Current and Non-current A

Other Current and Non-current Assets	6 Months Ended
	Jun. 30, 2024
Other Current and Non-current Assets
Other Current and Non-current Assets	6 Other Current and Non-current Assets ​ Other current and non-current assets consisted of the following (in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ As of ​ As of ​ June 30, 2024 December 31, 2023 Straight-lining of revenue ​ $ 28,989 ​ $ 36,495 Marketable securities ​ ​ 99,232 ​ ​ 86,029 Claims receivable ​ ​ 14,420 ​ ​ 12,026 Other current assets ​ ​ 9,734 ​ ​ 7,623 Total othe current assets ​ $ 152,375 ​ $ 142,173 Straight-lining of revenue ​ $ 52,461 ​ $ 63,382 Other non-current assets ​ ​ 24,671 ​ ​ 9,245 Total other non-current assets ​ $ 77,132 ​ $ 72,627 ​ 6 Other Current and Non-current Assets (Continued) In June 2023, the Company acquired marketable securities of Eagle Bulk Shipping Inc., which was listed on the New York Stock Exchange (Ticker: EGLE) consisting of 1,552,865 shares of common stock for $68.2 million (out of which $24.4 million from Virage International Ltd., a related company). EGLE owned and operated a fleet of bulk carriers. As of December 31, 2023, these marketable securities were fair valued at $86.0 million and the Company recognized a $17.9 million gain on these marketable securities reflected under “Gain on investments” in the condensed consolidated statements of income in the period ended December 31, 2023. On December 11, 2023, Star Bulk Carriers Corp. (Ticker: SBLK), a NASDAQ-listed owner and operator of drybulk vessels, and EGLE announced that both companies had entered into a definitive agreement to combine in an all-stock merger, which was completed on April 9, 2024. Under the terms of the agreement, EGLE shareholders received 2.6211 shares of SBLK common stock in exchange for each share of EGLE common stock owned. As a result, the Company owns 4,070,214 shares of SBLK common stock, which were fair valued at $99.2 million as of June 30, 2024. The Company recognized a $13.2 million gain on marketable securities and dividend income on these securities amounting to $4.0 million in the six months ended June 30, 2024.

Accrued Liabilities

Accrued Liabilities	6 Months Ended
	Jun. 30, 2024
Accrued Liabilities
Accrued Liabilities	7 Accrued Liabilities ​ Accrued liabilities consisted of the following (in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ As of As of ​ ​ June 30, 2024 ​ December 31, 2023 Accrued interest ​ $ 10,248 ​ $ 8,312 Accrued dry-docking expenses ​ ​ 4,413 ​ ​ 3,276 Accrued expenses ​ ​ 9,978 ​ 8,870 Total ​ $ 24,639 ​ $ 20,458 ​ Accrued expenses mainly consisted of accruals related to the operation of the Company’s fleet as of June 30, 2024 and December 31, 2023.

Long-Term Debt, net

Long-Term Debt, net	6 Months Ended
	Jun. 30, 2024
Long-Term Debt, net
Long-Term Debt, net	8 Long-Term Debt, net ​ Long-term debt, net consisted of the following (in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Balance as of ​ Balance as of Credit Facility June 30, 2024 December 31, 2023 BNP Paribas/Credit Agricole $130 mil. Facility ​ $ 90,000 ​ $ 100,000 Alpha Bank $55.25 mil. Facility ​ ​ 44,000 ​ ​ 47,750 Syndicated $450.0 mil. Facility ​ ​ 181,000 ​ ​ — Citibank $382.5 mil. Revolving Credit Facility ​ ​ — ​ ​ — Senior unsecured notes ​ ​ 262,766 ​ ​ 262,766 Total long-term debt ​ $ 577,766 ​ $ 410,516 Less: Deferred finance costs, net ​ ​ (8,063) ​ ​ (6,342) Less: Current portion ​ ​ (25,160) ​ ​ (21,300) Total long-term debt net of current portion and deferred finance cost ​ $ 544,543 ​ $ 382,874 ​ In March 2024, the Company entered into a syndicated loan facility agreement of up to $450 million (the “Syndicated $450.0 mil. Facility”), which is secured by 8 of the Company’s container vessels under construction and newbuilds. An amount of $181.0 million was drawn down related to 3 of these vessels delivered to the Company as of June 30, 2024. This facility is repayable in quarterly instalments up to September 2030. The facility bears interest at SOFR 8 Long-Term Debt, net (Continued) In June 2022, the Company drew down $130.0 million of senior secured term loan facility from BNP Paribas and Credit Agricole, which is secured by six 5,466 TEU sister vessels acquired in 2021. This facility is repayable in eight quarterly instalments of $5.0 million, twelve quarterly instalments of $1.9 million together with a balloon payment of $67.2 million payable over five-year term. The facility bears interest at SOFR In December 2022, the Company early extinguished the remaining $437.75 million of the Citibank/Natwest $815 mil. Facility and replaced it with Citibank of up to $382.5 mil. Revolving Credit Facility, out of which nil is drawn down as of June 30, 2024 and with Alpha Bank $55.25 mil. Facility, which was drawn down in full. Citibank $382.5 mil. Revolving Credit Facility is reducing and repayable over 5 years in 20 quarterly reductions of $11.25 million each together with a final reduction of $157.5 million at maturity in December 2027. This facility bears interest at SOFR SOFR The Company incurred interest expense amounting to $18.7 million, out of which $11.4 million was capitalized in the six months ended June 30, 2024 compared to $18.5 million of interest expense incurred (including interest on leaseback obligations), out of which $7.2 million was capitalized in the six months ended June 30, 2023. As of June 30, 2024, there was a $315.0 million remaining borrowing availability under the Company’s Citibank $382.5 mil. Revolving Credit Facility and $269.0 million under the Syndicated $450.0 million Facility. Twenty-seven of the Company’s vessels having a net carrying value of $1,763.9 million as of June 30, 2024 and five container vessels under construction, were subject to first preferred mortgages as collateral to the Company’s credit facilities other than its senior unsecured notes. On February 11, 2021, the Company issued in a private placement, $300.0 million aggregate principal amount of senior unsecured notes, which bear interest at a fixed rate of 8.50% per annum and mature on March 1, 2028. At any time on or after March 1, 2024, March 1, 2025 and March 1, 2026 the Company may elect to redeem all or any portion of the notes, respectively, at a price equal to 104.25%, 102.125% and 100%, respectively, of the principal amount being redeemed. Prior to March 1, 2024 the Company could have redeemed up to 35% of the aggregate principal of the notes from equity offering proceeds at a price equal to 108.50% within 90 days after the equity offering closing. In December 2022, the Company repurchased $37.2 million aggregate principal amount of its unsecured senior notes in a privately negotiated transaction. Interest payments on the notes are payable semi-annually commencing on September 1, 2021. $9.0 million of bond issuance costs were deferred and are recognized over the life of the bond through the effective interest method. The scheduled debt maturities of long-term debt subsequent to June 30, 2024 are as follows (in thousands): ​ ​ ​ ​ ​ ​ ​ Principal Payments due by period ended repayments June 30, 2025 ​ $ 25,160 June 30, 2026 ​ ​ 25,160 June 30, 2027 ​ ​ 92,360 June 30, 2028 ​ ​ 294,326 June 30, 2029 ​ ​ 140,760 Total long-term debt ​ $ 577,766 ​ Alpha Bank $55.25 mil. Facility, Citibank $382.5 mil. Revolving Credit Facility and Syndicated $450.0 mil. Facility contain a requirement to maintain minimum fair market value of collateral vessels to loan value coverage of 120% and the BNP Paribas/Credit Agricole $130 mil. Facility of 125%. Additionally, these facilities require to maintain the following financial covenants: ​ (i) minimum liquidity of $30.0 million; (ii) maximum consolidated debt (less cash and cash equivalents) to consolidated EBITDA ratio of 6.5 x; and (iii) minimum consolidated EBITDA to net interest expense ratio of 2.5 x. ​ 8 Long-Term Debt, net (Continued) Each of the credit facilities except for senior unsecured notes are collateralized by first preferred mortgages over the vessels financed, general assignment of all hire freights, income and earnings, the assignment of their insurance policies, as well as any proceeds from the sale of mortgaged vessels, stock pledges and benefits from corporate guarantees. The Company was in compliance with the financial covenants contained in the credit facilities agreements as of June 30, 2024 and December 31, 2023.

Financial Instruments

Financial Instruments	6 Months Ended
	Jun. 30, 2024
Financial Instruments
Financial Instruments	9 Financial Instruments The following is a summary of the Company’s risk management strategies and the effect of these strategies on the Company’s condensed consolidated financial statements. ​ Interest Rate Risk: ​ Concentration of Credit Risk: ​ Fair Value: ​ a. Interest Rate Swap Hedges The Company currently has no outstanding interest rate swaps agreements. However, in the past years, the Company entered into interest rate swap agreements with its lenders in order to manage its floating rate exposure. Certain variable-rate interests on specific borrowings were associated with vessels under construction and were capitalized as a cost of the specific vessels. In accordance with the accounting guidance on derivatives and hedging, the amounts related to realized gains or losses on cash flow hedges that have been entered into and qualified for hedge accounting, in order to hedge the variability of that interest, were recognized in accumulated other comprehensive loss and are reclassified into earnings over the depreciable life of the constructed asset, since that depreciable life coincides with the amortization period for the capitalized interest cost on the debt. An amount of $1.8 million was reclassified into earnings for the six months ended June 30, 2024 and 2023, representing its amortization over the depreciable life of the vessels. An amount of $3.6 million is expected to be reclassified into earnings within the next 12 months. b. Fair Value of Financial Instruments ​ The Company determines fair value as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. Inputs used in the valuation techniques to derive fair values are classified based on a three-level hierarchy. ​ Level I: Inputs are unadjusted, quoted prices in active markets for identical assets or liabilities that the Company has the ability to access. Valuation of these items does not entail a significant amount of judgment. Level II: Inputs other than quoted prices included in Level I that are observable for the asset or liability through corroboration with market data at the measurement date. Level III: Inputs that are unobservable. The Company did not use any Level 3 inputs as of June 30, 2024 and December 31, 2023. 9 Financial Instruments (Continued) The estimated fair values of the Company’s financial instruments are as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ As of June 30, 2024 ​ As of December 31, 2023 ​ Book Value Fair Value Book Value Fair Value ​ ​ (in thousands of $) Cash and cash equivalents ​ $ 372,446 ​ $ 372,446 ​ $ 271,809 ​ $ 271,809 Marketable securities ​ $ 99,232 ​ $ 99,232 ​ $ 86,029 ​ $ 86,029 Secured long-term debt, including current portion(1) ​ $ 315,000 ​ $ 315,000 ​ $ 147,750 ​ $ 147,750 Unsecured long-term debt(1) ​ $ 262,766 ​ $ 250,491 ​ $ 262,766 ​ $ 241,969 ​ The estimated fair value of the financial instruments that are measured at fair value on a recurring basis, categorized based upon the fair value hierarchy, are as follows as of June 30, 2024: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Fair Value Measurements as of June 30, 2024 ​ Total (Level I) (Level II) (Level III) ​ ​ (in thousands of $) Marketable securities ​ $ 99,232 ​ $ 99,232 ​ $ — ​ $ — ​ The estimated fair value of the financial instruments that are not measured at fair value on a recurring basis, categorized based upon the fair value hierarchy, are as follows as of June 30, 2024: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Fair Value Measurements as of June 30, 2024 ​ Total (Level I) (Level II) (Level III) ​ ​ ​ (in thousands of $) Cash and cash equivalents ​ $ 372,446 ​ $ 372,446 ​ $ — ​ $ — Secured long-term debt, including current portion(1) ​ $ 315,000 ​ $ — ​ $ 315,000 ​ $ — Unsecured long-term debt(1) ​ $ 250,491 ​ $ 250,491 ​ $ — ​ $ — ​ The estimated fair value of the financial instruments that are measured at fair value on a recurring basis, categorized based upon the fair value hierarchy, are as follows as of December 31, 2023: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Fair Value Measurements as of December 31, 2023 ​ Total (Level I) (Level II) (Level III) ​ (in thousands of $) Marketable securities ​ $ 86,029 ​ $ 86,029 ​ $ — ​ $ — ​ The estimated fair value of the financial instruments that are not measured at fair value on a recurring basis, categorized based upon the fair value hierarchy, are as follows as of December 31, 2023: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Fair Value Measurements as of December 31, 2023 ​ Total (Level I) (Level II) (Level III) ​ ​ (in thousands of $) Cash and cash equivalents ​ $ 271,809 ​ $ 271,809 ​ $ — ​ $ — Secured long-term debt, including current portion(1) ​ $ 147,750 ​ $ — ​ $ 147,750 ​ $ — Unsecured long-term debt(1) ​ $ 241,969 ​ $ 241,969 ​ $ — ​ $ — (1) Secured and unsecured long-term debt, including current portion is presented gross of deferred finance costs of $8.1 million and $6.3 million as of June 30, 2024 and December 31, 2023, respectively. The fair value of the Company’s secured debt is estimated based on currently available debt with similar contract terms, interest rate and remaining maturities.

Commitments and Contingencies

Commitments and Contingencies	6 Months Ended
	Jun. 30, 2024
Commitments and Contingencies
Commitments and Contingencies	10 Commitments and Contingencies ​ There are no material legal proceedings to which the Company is a party or to which any of its properties are the subject, or other contingencies that the Company is aware of, other than routine litigation incidental to the Company’s business. ​ The Company has outstanding commitments under vessel construction contracts and contracts for the acquisition of secondhand drybulk vessel as of June 30, 2024, see the Note 4 “Fixed Assets, Advances for Vessels Acquisition and Vessels under Construction”. ​

Stockholders' Equity

Stockholders' Equity	6 Months Ended
	Jun. 30, 2024
Stockholders' Equity
Stockholders' Equity	11 Stockholders’ Equity ​ In the period ended June 30, 2024, the Company declared and paid dividend of $0.80 per share of common stock paid in each of March and June amounting to $31.0 million, compared to a dividend of $0.75 per share of common stock in each of February and May amounting to $30.4 million in the period ended June 30, 2023. The Company issued 11 and 20 shares of common stock pursuant to its dividends reinvestment plan in the periods ended June 30, 2024 and June 30, 2023, respectively. ​ In June 2022, the Company announced a share repurchase program of up to $100 million of the Company’s common stock. A $100 million increase to the existing share repurchase program, for a total aggregate amount of $200 million, was approved by the Company’s Board of Directors on November 10, 2023. The Company repurchased 73,064 shares of the Company’s common stock in the open market for $5.2 million in the six months ended June 30, 2024, 1,131,040 shares for $70.6 million in the year ended December 31, 2023 and 466,955 shares for $28.6 million in the period ended December 31, 2022. As of June 30, 2024, the Company had repurchased a total of 1,671,059 shares of common stock for $104.4 million under this repurchase program. ​ As of April 18, 2008, the Board of Directors and the Compensation Committee approved incentive compensation of the Manager’s employees with its shares from time to time, after specific for each such time, decision by the compensation committee and the Board of Directors in order to provide a means of compensation in the form of free shares to certain employees of the Manager of the Company’s common stock. The plan was effective as of December 31, 2008. Pursuant to the terms of the plan, employees of the Manager may receive (from time to time) shares of the Company’s common stock as additional compensation for their services offered during the preceding period. The total amount of stock to be granted to employees of the Manager will be at the Company’s Board of Directors’ discretion only and there will be no contractual obligation for any stock to be granted as part of the employees’ compensation package in future periods. No restricted shares were issued and outstanding under this program as of June 30, 2024 and December 31, 2023. ​ The aggregate number of shares of common stock for which awards may be granted under the Plan shall not exceed 1,000,000 shares plus the number of unvested shares granted before August 2, 2019. The equity awards may be granted by the Company’s Compensation Committee or Board of Directors under its amended and restated 2006 equity compensation plan. Awards made under the Plan that have been forfeited, cancelled or have expired, will not be treated as having been granted for purposes of the preceding sentence. On November 10, 2023, the Company granted 100,000 fully vested shares as well as two The Company has also established the Directors Share Payment Plan under its 2006 equity compensation plan. The purpose of the plan is to provide a means of payment of all or a portion of compensation payable to directors of the Company in the form of Company’s Common Stock. The plan was effective as of April 18, 2008. Each member of the Board of Directors of the Company may participate in the plan. Pursuant to the terms of the plan, directors may elect to receive in Common Stock all or a portion of their compensation. Following December 31 of each year, the Company delivers to each Director the number of shares represented by the rights credited to their Share Payment Account during the preceding calendar year. During the six months ended June 30, 2024 and June 30, 2023, none of the directors elected to receive their compensation in Company shares.

Lease Arrangements

Lease Arrangements	6 Months Ended
	Jun. 30, 2024
Lease Arrangements
Lease Arrangements	12 Lease Arrangements ​ Charters-out ​ As of June 30, 2024, the Company generated leasing operating revenues from its 70 container vessels on time charter or bareboat charter agreements with remaining terms ranging from less than one year to 2030. Additionally, the Company contracted multi-year time charter agreements for 13 of its container vessels under construction as of June 30, 2024. Under the terms of the charter party agreements, most charterers have options to extend the duration of contracts ranging from less than one year to three years after the expiration of the contract. The Company determines fair value of its vessels at the lease commencement date and at the end of lease term for lease classification with the assistance from valuations obtained by third party independent shipbrokers. The Company manages its risk associated with the residual value of its vessels after the expiration of the charter party agreements by seeking multi-year charter arrangements for its vessels. ​ In May 2022, the Company received $238.9 million of charter hire prepayment related to charter contracts for 15 of the Company’s vessels, representing partial prepayment of charter hire payable up to January 2027. This charter hire prepayment is recognized in revenue through the remaining period of each charter party agreement, in addition to the contracted future minimum payments reflected in the below table. As of June 30, 2024, the outstanding balances of the current and non-current portion of unearned revenue in relation to this prepayment amounted to $43.6 million and $38.8 million, respectively. As of December 31, 2023, the outstanding balances of the current and non-current portion of unearned revenue in relation to this prepayment amounted to $44.2 million and $60.1 million, respectively. ​ The future minimum payments, expected to be received on non-cancellable time charters and bareboat charters classified as operating leases consisted of the following as of June 30, 2024 (in thousands): ​ ​ ​ ​ ​ Remainder of 2024 $ 445,414 2025 ​ 802,559 2026 ​ 626,893 2027 ​ 398,621 2028 ​ 170,368 2029 ​ ​ 130,517 2030 and thereafter ​ 114,879 Total future rentals ​ $ 2,689,251 ​ Rentals from time charters are not generally received when a vessel is off-hire, including time required for normal periodic maintenance of the vessel. In arriving at the future minimum rentals, an estimated time off-hire to perform periodic maintenance on each vessel has been deducted, although there is no assurance that such estimate will be reflective of the actual off-hire in the future.

Earnings per Share

Earnings per Share	6 Months Ended
	Jun. 30, 2024
Earnings per Share
Earnings per Share	13 Earnings per Share ​ The following table sets forth the computation of basic and diluted earnings per share: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three months ended ​ June 30, 2024 June 30, 2023 ​ ​ (in thousands) Numerator: ​ ​ ​ ​ ​ ​ Net income ​ $ 141,152 ​ $ 147,021 ​ ​ ​ ​ ​ ​ ​ Denominator (number of shares in thousands): ​ ​ ​ ​ ​ ​ Basic weighted average common shares outstanding ​ 19,348 ​ 20,081 Effect of dilutive securities: ​ ​ ​ ​ Dilutive effect of non-vested shares ​ 172 ​ — Diluted weighted average common shares outstanding ​ 19,520 ​ 20,081 Basic earnings per share ​ ​ 7.30 ​ ​ 7.32 Diluted earnings per share ​ ​ 7.23 ​ ​ 7.32 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Six months ended ​ June 30, 2024 June 30, 2023 ​ ​ (in thousands) Numerator: ​ ​ ​ ​ ​ ​ Net income ​ $ 291,650 ​ $ 293,222 ​ ​ ​ ​ ​ ​ ​ Denominator (number of shares in thousands): ​ ​ ​ ​ Basic weighted average common shares outstanding ​ ​ 19,380 ​ ​ 20,214 Effect of dilutive securities: ​ ​ ​ ​ ​ ​ Dilutive effect of non-vested shares ​ ​ 172 ​ ​ — Diluted weighted average common shares outstanding ​ ​ 19,552 ​ ​ 20,214 Basic earnings per share ​ ​ 15.05 ​ ​ 14.51 Diluted earnings per share ​ ​ 14.92 ​ ​ 14.51 ​

Related Party Transactions

Related Party Transactions	6 Months Ended
	Jun. 30, 2024
Related Party Transactions
Related Party Transactions	14 Related Party Transactions ​ On November 10, 2023, the Company entered into an amended and restated management agreement with Danaos Shipping Company Limited (“the Manager”), extending the term from December 31, 2024 to December 31, 2025. Under this agreement, the Company pays to the Manager the following fees in 2024: (i) an annual management fee of $2.0 million and 100,000 shares of the Company’s common stock, payable annually, (ii) a daily vessel management fee of $475 for vessels on bareboat charter, pro-rated for the number of calendar days the Company owns each vessel, (iii) a daily vessel management fee of $950 for vessels on time charter and voyage charter, pro-rated for the number of calendar days the Company owns each vessel, (iv) a fee of 1.25% on all freight, charter hire, ballast bonus and demurrage for each vessel, (v) a fee of 1.0% based on the contract price of any vessel bought or sold by it on the Company’s behalf, including newbuilding contracts, and (vi) a flat fee of $850 thousand per newbuilding vessel, which is capitalized to the newbuilding cost, for the on premises supervision of any newbuilding contracts by selected engineers and others of its staff. 14 Related Party Transactions (Continued) ​ Management fees to the Manager amounted to $13.9 million and $10.5 million in the six months ended June 30, 2024 and 2023, respectively, and are presented under “General and administrative expenses” in the condensed consolidated statements of income. ​ Commissions to the Manager amounted to $5.9 million and $5.7 million in the six months ended June 30, 2024 and 2023, respectively, and are presented under “Voyage expenses” in the condensed consolidated statements of income. Commissions on the contract price of the newly acquired vessels totaling $3.1 million and $0.7 million in the six months ended June 30, 2024 and year ended December 31, 2023, respectively, were capitalized to the cost of newly acquired vessels. Additionally, supervision fees for vessels under construction totaling $2.1 million and $3.0 million were charged by the Manager and capitalized to vessels under construction costs in the six months ended June 30, 2024 and the year ended December 31, 2023, respectively. ​ The balance “Due from related parties” in the condensed consolidated balance sheets totaling $46.8 million and $51.4 million as of June 30, 2024 and December 31, 2023, respectively, represents advances to the Manager on account of the vessels’ operating and other expenses. Defined benefit obligation for the executive officers amounting to $13.5 million and $13.3 million was presented under “Other long-term liabilities” in the condensed consolidated balance sheets as of June 30, 2024 and December 31, 2023, respectively. The Company recognized prior service cost and periodic cost of this defined benefit executive retirement plan amounting to $0.7 million and $0.9 million in the six months ended June 30, 2024 and June 30, 2023, respectively. ​ An amount of $0.1 million and nil was due to executive officers and is presented under “Accounts payable” in the condensed consolidated balance sheets as of June 30, 2024 and December 31, 2023, respectively.

Operating Revenue

Operating Revenue	6 Months Ended
	Jun. 30, 2024
Operating Revenue
Operating Revenue	15 Operating Revenue ​ Operating revenue from time charters and bareboat charters and voyage charters for the six months ended June 30, 2024 and 2023, were as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Six months ended ​ June 30, 2024 June 30, 2023 Time charters and bareboat charters ​ $ 476,853 ​ $ 485,053 Voyage charters ​ 22,902 ​ — Total Revenue ​ $ 499,755 ​ $ 485,053 ​ As of June 30, 2024 and December 31, 2023, the Company had accounts receivable from voyage charter agreements amounting to $1.6 million and $1.0 million, respectively. The charter hire received in advance from voyage charter agreements amounting to nil and $2.0 million is presented under current “Unearned revenue” as of June 30, 2024 and December 31, 2023, respectively.

Segments

Segments	6 Months Ended
	Jun. 30, 2024
Segments
Segments	16 Segments ​ Until the acquisition of the drybulk vessels in 2023, the Company reported financial information and evaluated its operations by total charter revenues. Since 2023, for management purposes, the Company is organized based on operating revenues generated from container vessels and drybulk vessels and has two reporting segments: (1) a container vessels segment and (2) a drybulk vessels segment. The container vessels segment owns and operates container vessels which are primarily chartered on multi-year, fixed-rate time charter and bareboat charter agreements. The drybulk vessels segment owns and operates drybulk vessels to provide drybulk commodities transportation services. ​ The Company’s chief operating decision maker monitors and assesses the performance of the container vessels segment and the drybulk vessels segment based on net income. Items included in the applicable segment’s net income are directly allocated to the extent that the items are directly or indirectly attributable to the segments. With regards to the items that are allocated by indirect calculations, their allocation is commensurate to the utilization of key resources. Investments in marketable securities and investments in affiliates accounted for using the equity method of accounting are not allocated to any of the Company’s reportable segments. 16 Segments (Continued) The following table summarizes the Company’s selected financial information for the six months ended and as of June 30, 2024, by segment (in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Container vessels ​ Drybulk vessels ​ ​ ​ ​ segment segment Total Operating revenues ​ $ 463,997 ​ $ 35,758 ​ $ 499,755 Voyage expenses ​ (16,741) ​ (16,279) ​ (33,020) Vessel operating expenses ​ (79,430) ​ (10,774) ​ (90,204) Depreciation ​ (65,255) ​ (3,988) ​ (69,243) Amortization of deferred drydocking and special survey costs ​ (12,135) ​ (289) ​ (12,424) Interest income ​ 5,859 ​ — ​ 5,859 Interest expense ​ (8,230) ​ — ​ (8,230) Net income per segment ​ $ 272,042 ​ $ 2,627 ​ $ 274,669 Gain on investments, dividend income and equity loss on investments ​ ​ ​ ​ ​ 16,981 Net income ​ ​ ​ ​ ​ ​ ​ $ 291,650 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Container vessels Drybulk vessels ​ ​ ​ ​ segment ​ segment ​ Total Total assets per segment ​ $ 3,710,004 ​ $ 237,057 ​ $ 3,947,061 Marketable securities ​ ​ ​ ​ ​ ​ ​ ​ 99,232 Investments in affiliates ​ ​ ​ ​ ​ ​ ​ ​ 64 Total assets ​ ​ ​ ​ ​ ​ ​ $ 4,046,357 ​ The following table summarizes the Company’s selected financial information for the six months ended June 30, 2023, by segment (in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Container vessels ​ Drybulk vessels ​ ​ ​ ​ segment segment Total Operating revenues ​ $ 485,053 ​ — ​ $ 485,053 Voyage expenses ​ (16,282) — ​ (16,282) Vessel operating expenses ​ (82,500) — ​ (82,500) Depreciation ​ (63,439) — ​ (63,439) Amortization of deferred drydocking and special survey costs ​ (8,337) — ​ (8,337) Interest income ​ 6,319 — ​ 6,319 Interest expense ​ (12,603) — ​ (12,603) Net income per segment ​ $ 290,110 — ​ $ 290,110 Gain on investments, dividend income and equity loss on investments ​ ​ ​ ​ 3,112 Net income ​ ​ ​ ​ $ 293,222 ​

Subsequent Events

Subsequent Events	6 Months Ended
	Jun. 30, 2024
Subsequent Events
Subsequent Events	17 Subsequent Events ​ In July 2024, the Company exercised its option and ordered another three 9,200 TEU newbuilding vessels for an aggregate purchase price of $315 million with deliveries in 2027 and 2028. ​ The Company has declared a dividend of $0.80 per share of common stock payable on August 29, 2024, to holders of record on August 20, 2024. ​ On August 2, 2024, the Company drew down $55.0 million on Syndicated $450.0 million facility related to a coming delivery of another one container vessel newbuilding. ​

Basis of Presentation and Gen_2

Basis of Presentation and General Information (Tables)	6 Months Ended
	Jun. 30, 2024
Basis of Presentation and General Information
Schedule of the vessel owning companies (the "Danaos Subsidiaries")	As of June 30, 2024, Danaos included the vessel owning companies (the “Danaos Subsidiaries”) of container vessels and drybulk vessels listed below: Container vessels: ​ ​ ​ ​ ​ ​ ​ ​ ​ Company Date of Incorporation Vessel Name Year Built TEU (1) Megacarrier (No. 1) Corp. ​ September 10, 2007 ​ Kota Peony (ex Hyundai Honour) ​ 2012 ​ 13,100 Megacarrier (No. 2) Corp. ​ September 10, 2007 ​ Kota Primrose (ex Hyundai Respect) ​ 2012 ​ 13,100 Megacarrier (No. 3) Corp. ​ September 10, 2007 ​ Kota Plumbago (ex Hyundai Smart) ​ 2012 ​ 13,100 Megacarrier (No. 4) Corp. ​ September 10, 2007 ​ Speed (ex Hyundai Speed) ​ 2012 ​ 13,100 Megacarrier (No. 5) Corp. ​ September 10, 2007 ​ Ambition (ex Hyundai Ambition) ​ 2012 ​ 13,100 CellContainer (No. 6) Corp. ​ October 31, 2007 ​ Express Berlin ​ 2011 ​ 10,100 CellContainer (No. 7) Corp. ​ October 31, 2007 ​ Express Rome ​ 2011 ​ 10,100 CellContainer (No. 8) Corp. ​ October 31, 2007 ​ Express Athens ​ 2011 ​ 10,100 Karlita Shipping Co. Ltd. ​ February 27, 2003 ​ Pusan C ​ 2006 ​ 9,580 Ramona Marine Co. Ltd. ​ February 27, 2003 ​ Le Havre ​ 2006 ​ 9,580 Oceancarrier (No. 2) Corp. ​ October 15, 2020 ​ Bremen ​ 2009 ​ 9,012 Oceancarrier (No. 3) Corp. ​ October 15, 2020 ​ C Hamburg ​ 2009 ​ 9,012 Blackwell Seaways Inc. ​ January 9, 2020 ​ Niledutch Lion ​ 2008 ​ 8,626 Oceancarrier (No.1) Corp. ​ February 19, 2020 ​ Kota Manzanillo ​ 2005 ​ 8,533 Springer Shipping Co. ​ April 29, 2019 ​ Belita ​ 2006 ​ 8,533 Teucarrier (No. 5) Corp. ​ September 17, 2007 ​ CMA CGM Melisande ​ 2012 ​ 8,530 Teucarrier (No. 1) Corp. ​ January 31, 2007 ​ CMA CGM Attila ​ 2011 ​ 8,530 Teucarrier (No. 2) Corp. ​ January 31, 2007 ​ CMA CGM Tancredi ​ 2011 ​ 8,530 Teucarrier (No. 3) Corp. ​ January 31, 2007 ​ CMA CGM Bianca ​ 2011 ​ 8,530 Teucarrier (No. 4) Corp. ​ January 31, 2007 ​ CMA CGM Samson ​ 2011 ​ 8,530 Oceanew Shipping Ltd. ​ January 14, 2002 ​ Europe ​ 2004 ​ 8,468 Oceanprize Navigation Ltd. ​ January 21, 2003 ​ America ​ 2004 ​ 8,468 Rewarding International Shipping Inc. ​ October 1, 2019 ​ Kota Santos ​ 2005 ​ 8,463 Teushipper (No. 1) Corp. ​ March 14, 2022 ​ Catherine C (4) ​ 2024 ​ 8,010 Teushipper (No. 2) Corp. ​ March 14, 2022 ​ Greenland (4) ​ 2024 ​ 8,010 Boxsail (No. 1) Corp. ​ March 4, 2022 ​ Interasia Accelerate (4) ​ 2024 ​ 7,165 Boxcarrier (No. 2) Corp. ​ June 27, 2006 ​ CMA CGM Musset ​ 2010 ​ 6,500 Boxcarrier (No. 3) Corp. ​ June 27, 2006 ​ CMA CGM Nerval ​ 2010 ​ 6,500 Boxcarrier (No. 4) Corp. ​ June 27, 2006 ​ CMA CGM Rabelais ​ 2010 ​ 6,500 Boxcarrier (No. 5) Corp. ​ June 27, 2006 ​ Racine ​ 2010 ​ 6,500 Boxcarrier (No. 1) Corp. ​ June 27, 2006 ​ CMA CGM Moliere ​ 2009 ​ 6,500 Expresscarrier (No. 1) Corp. ​ March 5, 2007 ​ YM Mandate ​ 2010 ​ 6,500 Expresscarrier (No. 2) Corp. ​ March 5, 2007 ​ YM Maturity ​ 2010 ​ 6,500 Actaea Company Limited ​ October 14, 2014 ​ Savannah (ex Zim Savannah) ​ 2002 ​ 6,402 Asteria Shipping Company Limited ​ October 14, 2014 ​ Dimitra C ​ 2002 ​ 6,402 Averto Shipping S.A. ​ June 12, 2015 ​ Suez Canal ​ 2002 ​ 5,610 Sinoi Marine Ltd. ​ June 12, 2015 ​ Kota Lima ​ 2002 ​ 5,544 Oceancarrier (No. 4) Corp. ​ July 6, 2021 ​ Wide Alpha ​ 2014 ​ 5,466 Oceancarrier (No. 5) Corp. ​ July 6, 2021 ​ Stephanie C ​ 2014 ​ 5,466 Oceancarrier (No. 6) Corp. ​ July 6, 2021 ​ Maersk Euphrates ​ 2014 ​ 5,466 Oceancarrier (No. 7) Corp. ​ July 6, 2021 ​ Wide Hotel ​ 2015 ​ 5,466 Oceancarrier (No. 8) Corp. ​ July 6, 2021 ​ Wide India ​ 2015 ​ 5,466 Oceancarrier (No. 9) Corp. ​ July 6, 2021 ​ Wide Juliet ​ 2015 ​ 5,466 Continent Marine Inc. ​ March 22, 2006 ​ Monaco (ex Zim Monaco) ​ 2009 ​ 4,253 Medsea Marine Inc. ​ May 8, 2006 ​ Dalian ​ 2009 ​ 4,253 Blacksea Marine Inc. ​ May 8, 2006 ​ Zim Luanda ​ 2009 ​ 4,253 Bayview Shipping Inc. ​ March 22, 2006 ​ Rio Grande ​ 2008 ​ 4,253 Channelview Marine Inc. ​ March 22, 2006 ​ Paolo ​ 2008 ​ 4,253 Balticsea Marine Inc. ​ March 22, 2006 ​ Kingston ​ 2008 ​ 4,253 Seacarriers Services Inc. ​ June 28, 2005 ​ Seattle C ​ 2007 ​ 4,253 Seacarriers Lines Inc. ​ June 28, 2005 ​ Vancouver ​ 2007 ​ 4,253 Containers Services Inc. ​ May 30, 2002 ​ Tongala ​ 2004 ​ 4,253 Containers Lines Inc. ​ May 30, 2002 ​ Derby D ​ 2004 ​ 4,253 Boulevard Shiptrade S.A ​ September 12, 2013 ​ Dimitris C ​ 2001 ​ 3,430 CellContainer (No. 4) Corp. ​ March 23, 2007 ​ Express Spain ​ 2011 ​ 3,400 CellContainer (No. 5) Corp. ​ March 23, 2007 ​ Express Black Sea ​ 2011 ​ 3,400 CellContainer (No. 1) Corp. ​ March 23, 2007 ​ Express Argentina ​ 2010 ​ 3,400 CellContainer (No. 2) Corp. ​ March 23, 2007 ​ Express Brazil ​ 2010 ​ 3,400 CellContainer (No. 3) Corp. ​ March 23, 2007 ​ Express France ​ 2010 ​ 3,400 Wellington Marine Inc. ​ January 27, 2005 ​ Singapore ​ 2004 ​ 3,314 Auckland Marine Inc. ​ January 27, 2005 ​ Colombo ​ 2004 ​ 3,314 Vilos Navigation Company Ltd. ​ May 30, 2013 ​ Zebra ​ 2001 ​ 2,602 Trindade Maritime Company ​ April 10, 2013 ​ Amalia C (2) ​ 1998 ​ 2,452 Sarond Shipping Inc. ​ January 18, 2013 ​ Artotina ​ 2001 ​ 2,524 Speedcarrier (No. 7) Corp. ​ December 6, 2007 ​ Highway ​ 1998 ​ 2,200 Speedcarrier (No. 6) Corp. ​ December 6, 2007 ​ Progress C ​ 1998 ​ 2,200 Speedcarrier (No. 8) Corp. ​ December 6, 2007 ​ Bridge ​ 1998 ​ 2,200 Speedcarrier (No. 1) Corp. ​ June 28, 2007 ​ Phoenix D ​ 1997 ​ 2,200 Speedcarrier (No. 2) Corp. ​ June 28, 2007 ​ Advance ​ 1997 ​ 2,200 Speedcarrier (No. 3) Corp. ​ June 28, 2007 ​ Stride (3) ​ 1997 ​ 2,200 Speedcarrier (No. 5) Corp. ​ June 28, 2007 ​ Future ​ 1997 ​ 2,200 Speedcarrier (No. 4) Corp. ​ June 28, 2007 ​ Sprinter ​ 1997 ​ 2,200 Vessels under construction ​ ​ ​ ​ ​ ​ ​ ​ Boxsail (No. 2) Corp. ​ March 4, 2022 ​ Hull No. C7100-8 ​ 2024 ​ 7,165 Teushipper (No. 3) Corp. ​ March 14, 2022 ​ Hull No. HN4011 ​ 2024 ​ 8,010 Teushipper (No. 4) Corp. ​ March 14, 2022 ​ Hull No. HN4012 ​ 2024 ​ 8,010 Boxsail (No. 3) Corp. ​ March 4, 2022 ​ Hull No. CV5900-07 ​ 2025 ​ 6,014 Boxsail (No. 4) Corp. ​ March 4, 2022 ​ Hull No. CV5900-08 ​ 2025 ​ 6,014 Boxline (No. 1) Corp. ​ June 7, 2023 ​ Hull No. YZJ2023-1556 ​ 2026 ​ 8,258 Boxline (No. 2) Corp. ​ June 7, 2023 ​ Hull No. YZJ2023-1557 ​ 2026 ​ 8,258 Boxline (No. 3) Corp. ​ February 2, 2024 ​ Hull No. YZJ2024-1612 ​ 2026 ​ 8,258 Boxline (No. 4) Corp. ​ February 2, 2024 ​ Hull No. YZJ2024-1613 ​ 2027 ​ 8,258 Boxline (No. 5) Corp. ​ March 8, 2024 ​ Hull No. YZJ2024-1625 ​ 2027 ​ 8,258 Boxline (No. 6) Corp. ​ March 8, 2024 ​ Hull No. YZJ2024-1626 ​ 2027 ​ 8,258 Boxline (No. 7) Corp. ​ May 30, 2024 ​ Hull No. YZJ2024-1668 ​ 2027 ​ 8,258 Boxsail (No. 5) Corp. ​ June 13, 2024 ​ Hull No. C9200-7 ​ 2027 ​ 9,200 Boxsail (No. 6) Corp. ​ June 13, 2024 ​ Hull No. C9200-8 ​ 2027 ​ 9,200 (1) Twenty-feet equivalent unit, the international standard measure for containers and container vessels capacity. 1 Basis of Presentation and Gopeneral Information (Continued) ​ (2) The sale of Amalia C was completed in January 2023. (3) The Stride was sold for scrap in March 2024. (4) The Interasia Accelerate, Greenland and Catherine C were delivered in the second quarter of 2024.
Schedule of Dry Bulk Vessels	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Company Date of Incorporation Vessel Name Year Built DWT(1) Bulk No. 1 Corp. ​ July 14, 2023 Integrity 2010 175,996 Bulk No. 2 Corp. ​ July 14, 2023 Achievement 2011 175,850 Bulk No. 3 Corp. ​ July 14, 2023 Ingenuity 2011 176,022 Bulk No. 4 Corp. ​ July 14, 2023 ​ Genius 2012 175,580 Bulk No. 5 Corp. ​ July 14, 2023 Peace 2010 175,858 Bulk No. 6 Corp. ​ September 15, 2023 W Trader 2009 175,879 Bulk No. 7 Corp. ​ September 25, 2023 E Trader 2009 175,886 Bulk No. 9 Corp. ​ February 2, 2024 Gouverneur (ex Xin Hang) (2) 2010 178,043 Bulk No. 10 Corp. ​ February 15, 2024 Valentine (ex Star Audrey) (2) 2011 175,125 Contracted drybulk vessels ​ Bulk No. 8 Corp. ​ January 31, 2024 Danaos (ex Guo May) (3) 2011 176,536 (1) DWT, dead weight tons, the international standard measure for drybulk vessels capacity. (2) The vessels were delivered in the second quarter of 2024. (3) The vessel was delivered in July 2024.

Fixed Assets, Advances for Ve_2

Fixed Assets, Advances for Vessels Acquisition and Vessels under Construction (Tables)	6 Months Ended
	Jun. 30, 2024
Fixed Assets, Advances for Vessels Acquisition and Vessels under Construction
Schedule of remaining contractual commitments under 14 vessel construction contracts	The contractual commitments under 14 remaining vessel construction contracts are analyzed as follows as of June 30, 2024 (in thousands): ​ ​ ​ ​ ​ Payments due by period ended ​ December 31, 2024 ​ $ 205,067 December 31, 2025 ​ 204,550 December 31, 2026 ​ 295,212 December 31, 2027 ​ 288,984 Total contractual commitments ​ $ 993,813

Deferred Charges, net (Tables)

Deferred Charges, net (Tables)	6 Months Ended
	Jun. 30, 2024
Deferred Charges, net
Schedule of deferred charges, net	Deferred charges, net consisted of the following (in thousands): ​ ​ ​ ​ ​ ​ ​ Drydocking and ​ Special Survey Costs As of January 1, 2023 ​ $ 25,554 Additions ​ ​ 31,121 Amortization ​ (18,663) As of December 31, 2023 ​ ​ 38,012 Additions ​ 14,618 Amortization ​ (12,424) Write-off ​ ​ (660) As of June 30, 2024 ​ $ 39,546

Other Current and Non-current_2

Other Current and Non-current Assets (Tables)	6 Months Ended
	Jun. 30, 2024
Other Current and Non-current Assets
Schedule of other current and non current assets	Other current and non-current assets consisted of the following (in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ As of ​ As of ​ June 30, 2024 December 31, 2023 Straight-lining of revenue ​ $ 28,989 ​ $ 36,495 Marketable securities ​ ​ 99,232 ​ ​ 86,029 Claims receivable ​ ​ 14,420 ​ ​ 12,026 Other current assets ​ ​ 9,734 ​ ​ 7,623 Total othe current assets ​ $ 152,375 ​ $ 142,173 Straight-lining of revenue ​ $ 52,461 ​ $ 63,382 Other non-current assets ​ ​ 24,671 ​ ​ 9,245 Total other non-current assets ​ $ 77,132 ​ $ 72,627

Accrued Liabilities (Tables)

Accrued Liabilities (Tables)	6 Months Ended
	Jun. 30, 2024
Accrued Liabilities
Schedule of accrued liabilities	Accrued liabilities consisted of the following (in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ As of As of ​ ​ June 30, 2024 ​ December 31, 2023 Accrued interest ​ $ 10,248 ​ $ 8,312 Accrued dry-docking expenses ​ ​ 4,413 ​ ​ 3,276 Accrued expenses ​ ​ 9,978 ​ 8,870 Total ​ $ 24,639 ​ $ 20,458

Long-Term Debt, net (Tables)

Long-Term Debt, net (Tables)	6 Months Ended
	Jun. 30, 2024
Long-Term Debt, net
Schedule of long-term debt, net	Long-term debt, net consisted of the following (in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Balance as of ​ Balance as of Credit Facility June 30, 2024 December 31, 2023 BNP Paribas/Credit Agricole $130 mil. Facility ​ $ 90,000 ​ $ 100,000 Alpha Bank $55.25 mil. Facility ​ ​ 44,000 ​ ​ 47,750 Syndicated $450.0 mil. Facility ​ ​ 181,000 ​ ​ — Citibank $382.5 mil. Revolving Credit Facility ​ ​ — ​ ​ — Senior unsecured notes ​ ​ 262,766 ​ ​ 262,766 Total long-term debt ​ $ 577,766 ​ $ 410,516 Less: Deferred finance costs, net ​ ​ (8,063) ​ ​ (6,342) Less: Current portion ​ ​ (25,160) ​ ​ (21,300) Total long-term debt net of current portion and deferred finance cost ​ $ 544,543 ​ $ 382,874
Schedule of debt maturities of long-term debt	The scheduled debt maturities of long-term debt subsequent to June 30, 2024 are as follows (in thousands): ​ ​ ​ ​ ​ ​ ​ Principal Payments due by period ended repayments June 30, 2025 ​ $ 25,160 June 30, 2026 ​ ​ 25,160 June 30, 2027 ​ ​ 92,360 June 30, 2028 ​ ​ 294,326 June 30, 2029 ​ ​ 140,760 Total long-term debt ​ $ 577,766

Financial Instruments (Tables)

Financial Instruments (Tables)	6 Months Ended
	Jun. 30, 2024
Financial Instruments
Schedule of estimated fair values of the financial instruments	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ As of June 30, 2024 ​ As of December 31, 2023 ​ Book Value Fair Value Book Value Fair Value ​ ​ (in thousands of $) Cash and cash equivalents ​ $ 372,446 ​ $ 372,446 ​ $ 271,809 ​ $ 271,809 Marketable securities ​ $ 99,232 ​ $ 99,232 ​ $ 86,029 ​ $ 86,029 Secured long-term debt, including current portion(1) ​ $ 315,000 ​ $ 315,000 ​ $ 147,750 ​ $ 147,750 Unsecured long-term debt(1) ​ $ 262,766 ​ $ 250,491 ​ $ 262,766 ​ $ 241,969
Schedule of estimated fair value of the financial instruments that are measured at fair value on a recurring basis	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Fair Value Measurements as of June 30, 2024 ​ Total (Level I) (Level II) (Level III) ​ ​ (in thousands of $) Marketable securities ​ $ 99,232 ​ $ 99,232 ​ $ — ​ $ — ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Fair Value Measurements as of December 31, 2023 ​ Total (Level I) (Level II) (Level III) ​ (in thousands of $) Marketable securities ​ $ 86,029 ​ $ 86,029 ​ $ — ​ $ —
Schedule of estimated fair value of the financial instruments, categorized based upon the fair value hierarchy	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Fair Value Measurements as of June 30, 2024 ​ Total (Level I) (Level II) (Level III) ​ ​ ​ (in thousands of $) Cash and cash equivalents ​ $ 372,446 ​ $ 372,446 ​ $ — ​ $ — Secured long-term debt, including current portion(1) ​ $ 315,000 ​ $ — ​ $ 315,000 ​ $ — Unsecured long-term debt(1) ​ $ 250,491 ​ $ 250,491 ​ $ — ​ $ — ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Fair Value Measurements as of December 31, 2023 ​ Total (Level I) (Level II) (Level III) ​ ​ (in thousands of $) Cash and cash equivalents ​ $ 271,809 ​ $ 271,809 ​ $ — ​ $ — Secured long-term debt, including current portion(1) ​ $ 147,750 ​ $ — ​ $ 147,750 ​ $ — Unsecured long-term debt(1) ​ $ 241,969 ​ $ 241,969 ​ $ — ​ $ — (1) Secured and unsecured long-term debt, including current portion is presented gross of deferred finance costs of $8.1 million and $6.3 million as of June 30, 2024 and December 31, 2023, respectively. The fair value of the Company’s secured debt is estimated based on currently available debt with similar contract terms, interest rate and remaining maturities.

Lease Arrangements (Tables)

Lease Arrangements (Tables)	6 Months Ended
	Jun. 30, 2024
Lease Arrangements
Schedule of future minimum payments, expected to be received on non-cancellable time charters and bareboat charters	​ The future minimum payments, expected to be received on non-cancellable time charters and bareboat charters classified as operating leases consisted of the following as of June 30, 2024 (in thousands): ​ ​ ​ ​ ​ Remainder of 2024 $ 445,414 2025 ​ 802,559 2026 ​ 626,893 2027 ​ 398,621 2028 ​ 170,368 2029 ​ ​ 130,517 2030 and thereafter ​ 114,879 Total future rentals ​ $ 2,689,251

Earnings per Share (Tables)

Earnings per Share (Tables)	6 Months Ended
	Jun. 30, 2024
Earnings per Share
Schedule of computation of basic and diluted earnings per share	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three months ended ​ June 30, 2024 June 30, 2023 ​ ​ (in thousands) Numerator: ​ ​ ​ ​ ​ ​ Net income ​ $ 141,152 ​ $ 147,021 ​ ​ ​ ​ ​ ​ ​ Denominator (number of shares in thousands): ​ ​ ​ ​ ​ ​ Basic weighted average common shares outstanding ​ 19,348 ​ 20,081 Effect of dilutive securities: ​ ​ ​ ​ Dilutive effect of non-vested shares ​ 172 ​ — Diluted weighted average common shares outstanding ​ 19,520 ​ 20,081 Basic earnings per share ​ ​ 7.30 ​ ​ 7.32 Diluted earnings per share ​ ​ 7.23 ​ ​ 7.32 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Six months ended ​ June 30, 2024 June 30, 2023 ​ ​ (in thousands) Numerator: ​ ​ ​ ​ ​ ​ Net income ​ $ 291,650 ​ $ 293,222 ​ ​ ​ ​ ​ ​ ​ Denominator (number of shares in thousands): ​ ​ ​ ​ Basic weighted average common shares outstanding ​ ​ 19,380 ​ ​ 20,214 Effect of dilutive securities: ​ ​ ​ ​ ​ ​ Dilutive effect of non-vested shares ​ ​ 172 ​ ​ — Diluted weighted average common shares outstanding ​ ​ 19,552 ​ ​ 20,214 Basic earnings per share ​ ​ 15.05 ​ ​ 14.51 Diluted earnings per share ​ ​ 14.92 ​ ​ 14.51 ​

Operating Revenue (Tables)

Operating Revenue (Tables)	6 Months Ended
	Jun. 30, 2024
Operating Revenue
Schedule of operating revenue from time charters and bareboat charters and voyage charters	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Six months ended ​ June 30, 2024 June 30, 2023 Time charters and bareboat charters ​ $ 476,853 ​ $ 485,053 Voyage charters ​ 22,902 ​ — Total Revenue ​ $ 499,755 ​ $ 485,053

Segments (Tables)

Segments (Tables)	6 Months Ended
	Jun. 30, 2024
Segments
Summary of the company's selected financial information	The following table summarizes the Company’s selected financial information for the six months ended and as of June 30, 2024, by segment (in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Container vessels ​ Drybulk vessels ​ ​ ​ ​ segment segment Total Operating revenues ​ $ 463,997 ​ $ 35,758 ​ $ 499,755 Voyage expenses ​ (16,741) ​ (16,279) ​ (33,020) Vessel operating expenses ​ (79,430) ​ (10,774) ​ (90,204) Depreciation ​ (65,255) ​ (3,988) ​ (69,243) Amortization of deferred drydocking and special survey costs ​ (12,135) ​ (289) ​ (12,424) Interest income ​ 5,859 ​ — ​ 5,859 Interest expense ​ (8,230) ​ — ​ (8,230) Net income per segment ​ $ 272,042 ​ $ 2,627 ​ $ 274,669 Gain on investments, dividend income and equity loss on investments ​ ​ ​ ​ ​ 16,981 Net income ​ ​ ​ ​ ​ ​ ​ $ 291,650 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Container vessels Drybulk vessels ​ ​ ​ ​ segment ​ segment ​ Total Total assets per segment ​ $ 3,710,004 ​ $ 237,057 ​ $ 3,947,061 Marketable securities ​ ​ ​ ​ ​ ​ ​ ​ 99,232 Investments in affiliates ​ ​ ​ ​ ​ ​ ​ ​ 64 Total assets ​ ​ ​ ​ ​ ​ ​ $ 4,046,357 ​ The following table summarizes the Company’s selected financial information for the six months ended June 30, 2023, by segment (in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Container vessels ​ Drybulk vessels ​ ​ ​ ​ segment segment Total Operating revenues ​ $ 485,053 ​ — ​ $ 485,053 Voyage expenses ​ (16,282) — ​ (16,282) Vessel operating expenses ​ (82,500) — ​ (82,500) Depreciation ​ (63,439) — ​ (63,439) Amortization of deferred drydocking and special survey costs ​ (8,337) — ​ (8,337) Interest income ​ 6,319 — ​ 6,319 Interest expense ​ (12,603) — ​ (12,603) Net income per segment ​ $ 290,110 — ​ $ 290,110 Gain on investments, dividend income and equity loss on investments ​ ​ ​ ​ 3,112 Net income ​ ​ ​ ​ $ 293,222 ​

Basis of Presentation and Gen_3

Basis of Presentation and General Information (Details)	Jun. 30, 2024 item $ / shares shares	Dec. 31, 2023 $ / shares shares
Property, Plant and Equipment
Common stock, authorized capital stock (in shares) | shares	750,000,000	750,000,000
Common stock, par value (in dollars per share) | $ / shares	$ 0.01	$ 0.01
Preferred stock, authorized capital stock (in shares) | shares	100,000,000	100,000,000
Preferred stock, par value (in dollars per share) | $ / shares	$ 0.01	$ 0.01
Kota Peony
Property, Plant and Equipment
TEU	13,100
Kota Primrose
Property, Plant and Equipment
TEU	13,100
Kota Plumbago
Property, Plant and Equipment
TEU	13,100
Hyundai Speed
Property, Plant and Equipment
TEU	13,100
Ambition
Property, Plant and Equipment
TEU	13,100
Express Berlin
Property, Plant and Equipment
TEU	10,100
Express Rome
Property, Plant and Equipment
TEU	10,100
Express Athens
Property, Plant and Equipment
TEU	10,100
Pusan C
Property, Plant and Equipment
TEU	9,580
Le Havre
Property, Plant and Equipment
TEU	9,580
Bremen
Property, Plant and Equipment
TEU	9,012
C Hamburg
Property, Plant and Equipment
TEU	9,012
Niledutch Lion
Property, Plant and Equipment
TEU	8,626
Kota Manzanillo
Property, Plant and Equipment
TEU	8,533
Belita
Property, Plant and Equipment
TEU	8,533
CMA CGM Melisande
Property, Plant and Equipment
TEU	8,530
CMA CGM Attila
Property, Plant and Equipment
TEU	8,530
CMA CGM Tancredi
Property, Plant and Equipment
TEU	8,530
CMA CGM Bianca
Property, Plant and Equipment
TEU	8,530
CMA CGM Samson
Property, Plant and Equipment
TEU	8,530
Europe
Property, Plant and Equipment
TEU	8,468
America
Property, Plant and Equipment
TEU	8,468
Kota Santos
Property, Plant and Equipment
TEU	8,463
Greenland
Property, Plant and Equipment
TEU	8,010
Interasia Accelerate
Property, Plant and Equipment
TEU	7,165
CMA CGM Musset
Property, Plant and Equipment
TEU	6,500
CMA CGM Nerval
Property, Plant and Equipment
TEU	6,500
CMA CGM Rabelais
Property, Plant and Equipment
TEU	6,500
Racine (ex CMA CGM Racine)
Property, Plant and Equipment
TEU	6,500
CMA CGM Moliere
Property, Plant and Equipment
TEU	6,500
YM Mandate
Property, Plant and Equipment
TEU	6,500
YM Maturity
Property, Plant and Equipment
TEU	6,500
Catherine C
Property, Plant and Equipment
TEU	8,010
Savannah
Property, Plant and Equipment
TEU	6,402
Dimitra C
Property, Plant and Equipment
TEU	6,402
Suez Canal
Property, Plant and Equipment
TEU	5,610
Kota Lima
Property, Plant and Equipment
TEU	5,544
Wide Alpha
Property, Plant and Equipment
TEU	5,466
Stephanie C
Property, Plant and Equipment
TEU	5,466
Maersk Euphrates
Property, Plant and Equipment
TEU	5,466
Wide Hotel
Property, Plant and Equipment
TEU	5,466
Wide India
Property, Plant and Equipment
TEU	5,466
Wide Juliet
Property, Plant and Equipment
TEU	5,466
Monaco
Property, Plant and Equipment
TEU	4,253
Dalian
Property, Plant and Equipment
TEU	4,253
Zim Luanda
Property, Plant and Equipment
TEU	4,253
Rio Grande
Property, Plant and Equipment
TEU	4,253
Paolo (ex Zim Sao Paolo)
Property, Plant and Equipment
TEU	4,253
Kingston (ex Zim Kingston)
Property, Plant and Equipment
TEU	4,253
Seattle C
Property, Plant and Equipment
TEU	4,253
Vancouver
Property, Plant and Equipment
TEU	4,253
Tongala
Property, Plant and Equipment
TEU	4,253
Derby D
Property, Plant and Equipment
TEU	4,253
Dimitris C
Property, Plant and Equipment
TEU	3,430
Express Spain
Property, Plant and Equipment
TEU	3,400
Express Black Sea
Property, Plant and Equipment
TEU	3,400
Express Argentina
Property, Plant and Equipment
TEU	3,400
Express Brazil
Property, Plant and Equipment
TEU	3,400
Express France
Property, Plant and Equipment
TEU	3,400
Singapore
Property, Plant and Equipment
TEU	3,314
Colombo
Property, Plant and Equipment
TEU	3,314
Zebra
Property, Plant and Equipment
TEU	2,602
Amalia C
Property, Plant and Equipment
TEU	2,452
Artotina
Property, Plant and Equipment
TEU	2,524
Highway
Property, Plant and Equipment
TEU	2,200
Progress C
Property, Plant and Equipment
TEU	2,200
Bridge
Property, Plant and Equipment
TEU	2,200
Phoenix D
Property, Plant and Equipment
TEU	2,200
Advance
Property, Plant and Equipment
TEU	2,200
Stride
Property, Plant and Equipment
TEU	2,200
Future
Property, Plant and Equipment
TEU	2,200
Sprinter
Property, Plant and Equipment
TEU	2,200
Hull No. C7100-8
Property, Plant and Equipment
TEU	7,165
Hull No. HN4011
Property, Plant and Equipment
TEU	8,010
Hull No. HN4012
Property, Plant and Equipment
TEU	8,010
Hull No. CV5900-07
Property, Plant and Equipment
TEU	6,014
Hull No. CV5900-08
Property, Plant and Equipment
TEU	6,014
Hull No. YZJ2023-1556
Property, Plant and Equipment
TEU	8,258
Hull No. YZJ2023-1557
Property, Plant and Equipment
TEU	8,258
Hull No. Yzj 2024-1612
Property, Plant and Equipment
TEU	8,258
Hull No. Yzj 2024-1613
Property, Plant and Equipment
TEU	8,258
Hull No. Yzj 2024-1625
Property, Plant and Equipment
TEU	8,258
Hull No. Yzj 2024-1626
Property, Plant and Equipment
TEU	8,258
Hull No. YZJ2024-1668
Property, Plant and Equipment
TEU	8,258
Hull No. C9200-7
Property, Plant and Equipment
TEU	9,200
Hull No. C9200-8
Property, Plant and Equipment
TEU	9,200

Basis of Presentation and Gen_4

Basis of Presentation and General Information - Capesize drybulk vessels (Details)	Jun. 30, 2024 t
Integrity
Property, Plant and Equipment
Capesize drybulk vessels	175,996
Achievement
Property, Plant and Equipment
Capesize drybulk vessels	175,850
Ingenuity
Property, Plant and Equipment
Capesize drybulk vessels	176,022
Genius
Property, Plant and Equipment
Capesize drybulk vessels	175,580
Peace
Property, Plant and Equipment
Capesize drybulk vessels	175,858
W Trader
Property, Plant and Equipment
Capesize drybulk vessels	175,879
E Trader
Property, Plant and Equipment
Capesize drybulk vessels	175,886
Gouverneur
Property, Plant and Equipment
Capesize drybulk vessels	178,043
Valentine
Property, Plant and Equipment
Capesize drybulk vessels	175,125
Danaos
Property, Plant and Equipment
Capesize drybulk vessels	176,536

Investments in Affiliates (Deta

Investments in Affiliates (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023	Dec. 31, 2023	Mar. 31, 2023
Schedule of Equity Method Investments [Line Items]
Equity loss on investments	$ (97)	$ (738)	$ (206)	$ (3,326)
CTTC
Schedule of Equity Method Investments [Line Items]
Amount invested						$ 4,300
Ownership interest percentage						49%
Equity loss on investments			$ 200		$ 4,000

Fixed Assets, Advances for Ve_3

Fixed Assets, Advances for Vessels Acquisition and Vessels under Construction (Details) $ in Thousands		1 Months Ended									3 Months Ended		5 Months Ended	6 Months Ended		12 Months Ended
	Nov. 10, 2023 USD ($)	Jul. 31, 2024 USD ($) item	Jun. 30, 2024 USD ($) item	Mar. 31, 2024 item	Feb. 29, 2024 USD ($) item t	Jun. 30, 2023 item	Apr. 30, 2023 item	Jan. 31, 2023 USD ($)	Apr. 30, 2022 item	Mar. 31, 2022 item	Sep. 30, 2024 item	Jun. 30, 2024 USD ($) item	Jun. 29, 2024 USD ($)	Jun. 30, 2024 USD ($) item $ / T	Jun. 30, 2023 USD ($)	Dec. 31, 2023 USD ($) item t	Dec. 31, 2022 USD ($)	Dec. 23, 2022 USD ($)
Fixed Assets, net & Advances for Vessels under Construction
Interest expense capitalized | $														$ 11,400	$ 7,200
Gain on disposal/sale of vessels | $												$ 7,094		7,094	1,639
Net insurance proceeds from disposal/sale of vessels | $														10,639	3,914
Amortization of assumed time charter | $														4,500	$ 6,500
Unamortized time charter liabilities | $			$ 0									0		0		$ 4,500
Manager
Fixed Assets, net & Advances for Vessels under Construction
Supervision fee per newbuilding vessel payable | $	$ 850													850
Supervision fees for vessels capitalized | $			2,100									$ 2,100		2,100		$ 3,000
Capesize Bulk Carriers
Fixed Assets, net & Advances for Vessels under Construction
Number of vessels acquired					3											7
DWT of acquired carriers | t					529,704											1,231,157
Aggregate amount of purchase price | $					$ 79,800											$ 139,600
Purchase price paid | $		$ 21,000											$ 58,800
Number of vessels delivered		1										2
Vessel
Fixed Assets, net & Advances for Vessels under Construction
Residual value of the fleet | $			$ 574,900									$ 574,900		$ 574,900		540,500
Average life of scrap considered to calculate residual value of vessel, one														10 years
Average life of scrap considered to calculate residual value of vessel, two														5 years
Scrap value per ton (in dollars per ton) | $ / T														300
Amalia C
Fixed Assets, net & Advances for Vessels under Construction
TEU			2,452									2,452		2,452
Aggregate gross consideration | $																		$ 5,100
Gain on disposal/sale of vessels | $								$ 1,600
Vessesls under Construction
Fixed Assets, net & Advances for Vessels under Construction
Interest expense capitalized | $														$ 11,400		17,400	$ 5,000
Vessesls under Construction | TEU container vessels
Fixed Assets, net & Advances for Vessels under Construction
Number of vessels under construction			14									14		14
Aggregate purchase price | $			$ 1,245,900									$ 1,245,900		$ 1,245,900
Payments for purchase price of construction assets | $														90,200		$ 73,300	$ 88,600
Four 8,000 TEU Vessels
Fixed Assets, net & Advances for Vessels under Construction
Number of vessels delivered												2
Number of vessels contracted for construction									4
TEU of vessels contracted for construction									8,000
Four 8,000 TEU Vessels | Forecast
Fixed Assets, net & Advances for Vessels under Construction
Number of vessels expected to be delivered											2
Two 7,100 TEU Vessels
Fixed Assets, net & Advances for Vessels under Construction
Number of vessels delivered												1
Number of vessels contracted for construction										2
TEU of vessels contracted for construction										7,100
Two 7,100 TEU Vessels | Forecast
Fixed Assets, net & Advances for Vessels under Construction
Number of vessels expected to be delivered											1
Two 6,000 TEU Vessels
Fixed Assets, net & Advances for Vessels under Construction
Number of vessels contracted for construction							2
TEU of vessels contracted for construction							6,000
Two 8,200 TEU Vessels
Fixed Assets, net & Advances for Vessels under Construction
Number of vessels contracted for construction						2
TEU of vessels contracted for construction						8,200
Four 8,200 TEU Vessels
Fixed Assets, net & Advances for Vessels under Construction
Number of vessels contracted for construction				4	4
TEU of vessels contracted for construction				8,200	8,200
Two 9,200 TEU Vessels
Fixed Assets, net & Advances for Vessels under Construction
Number of vessels contracted for construction			2
TEU of vessels contracted for construction			9,200
One 8,200 TEU Vessels
Fixed Assets, net & Advances for Vessels under Construction
Number of vessels contracted for construction			1
TEU of vessels contracted for construction			8,200
Vessel Stride
Fixed Assets, net & Advances for Vessels under Construction
Gain on disposal/sale of vessels | $														7,100
Net insurance proceeds from disposal/sale of vessels | $														$ 10,600

Fixed Assets, Advances for Ve_4

Fixed Assets, Advances for Vessels Acquisition and Vessels under Construction - Remaining contractual commitments (Details) $ in Thousands	Jun. 30, 2024 USD ($)
Fixed Assets, Advances for Vessels Acquisition and Vessels under Construction
December 31, 2024	$ 205,067
December 31, 2025	204,550
December 31, 2026	295,212
December 31, 2027	288,984
Total contractual commitments	$ 993,813

Deferred Charges, net (Details)

Deferred Charges, net (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023	Dec. 31, 2023
Changes in deferred charges, net
Balance at the beginning of the period			$ 38,012	$ 25,554	$ 25,554
Additions			14,618		31,121
Amortization	$ (6,972)	$ (4,502)	(12,424)	$ (8,337)	(18,663)
Write-off			(660)
Balance at the end of the period	$ 39,546		$ 39,546		$ 38,012
Period of amortization for deferred costs			2 years 6 months

Other Current and Non-current_3

Other Current and Non-current Assets (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Other Current and Non-current Assets
Straight-lining of revenue	$ 28,989	$ 36,495
Marketable securities	99,232	86,029
Claims receivable	14,420	12,026
Other current assets	9,734	7,623
Total other current assets	152,375	142,173
Straight-lining of revenue	52,461	63,382
Other non-current assets	24,671	9,245
Total other non-current assets	$ 77,132	$ 72,627

Other Current and Non-current_4

Other Current and Non-current Assets - Eagle Bulk Shipping Inc (Details) - USD ($) $ in Thousands		1 Months Ended	3 Months Ended		6 Months Ended		12 Months Ended
	Dec. 11, 2023	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023	Dec. 31, 2023
Other Current and Non-current Assets
Marketable securities, fair value			$ 99,232		$ 99,232		$ 86,029
Gain on investments			2,224	$ 6,438	13,203	$ 6,438
Dividend income			3,052		3,984
SBLK Common Stock
Other Current and Non-current Assets
Marketable securities, fair value			$ 99,200		$ 99,200
Marketable securities owned			4,070,214		4,070,214
Gain on investments					$ 13,200
Dividend income					$ 4,000
Eagle Bulk Shipping Inc.
Other Current and Non-current Assets
Number of shares of marketable securities acquired		1,552,865
Amount paid to acquire marketable securities		$ 68,200
Marketable securities, fair value							86,000
Common stock of SBLK received in exchange for each share of EGLE common stock owned	2.6211
Gain on investments							$ 17,900
Related party | Virage | Eagle Bulk Shipping Inc.
Other Current and Non-current Assets
Amount paid to acquire marketable securities		$ 24,400

Accrued Liabilities (Details)

Accrued Liabilities (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Accrued Liabilities
Accrued interest	$ 10,248	$ 8,312
Accrued dry-docking expenses	4,413	3,276
Accrued expenses	9,978	8,870
Total	$ 24,639	$ 20,458

Long-Term Debt, net - Schedule

Long-Term Debt, net - Schedule of Debt (Details) - USD ($)	6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Mar. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Long-Term Debt, net
Total long-term debt	$ 577,766,000			$ 410,516,000
Less: Deferred finance costs, net	(8,063,000)			(6,342,000)
Less: Current portion	(25,160,000)			(21,300,000)
Total long-term debt net of current portion and deferred finance cost	544,543,000			382,874,000
Payments of long-term debt	(13,750,000)	$ (13,750,000)
BNP Paribas/Credit Agricole $130 mil. Facility
Long-Term Debt, net
Long-term debt	90,000,000			100,000,000
Credit facility	130,000,000
Alpha Bank $55.25 mil. Facility
Long-Term Debt, net
Long-term debt	44,000,000			47,750,000
Credit facility	55,250,000			55,250,000	$ 55,250,000
Syndicated $450.0 mil. Facility
Long-Term Debt, net
Long-term debt	181,000,000
Credit facility	450,000,000		$ 450,000,000
Citibank $382.5 mil. Revolving Credit Facility
Long-Term Debt, net
Credit facility	382,500,000			382,500,000	$ 382,500,000
Senior unsecured notes
Long-Term Debt, net
Long-term debt	$ 262,766,000			$ 262,766,000

Long-Term Debt, net - Additiona

Long-Term Debt, net - Additional Information (Details)		1 Months Ended		6 Months Ended		12 Months Ended
	Feb. 11, 2021 USD ($)	Dec. 31, 2022 USD ($) installment	Jun. 30, 2022 USD ($) item	Jun. 30, 2024 USD ($) item	Jun. 30, 2023 USD ($)	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($) installment	Mar. 31, 2024 USD ($) item
Long-Term Debt, net
Incurred interest expense				$ 18,700,000	$ 18,500,000
Interest expense capitalized				$ 11,400,000	$ 7,200,000
Vessels subject to first preferred mortgages as collateral | item				27
Carrying value of vessels subject to first preferred mortgages as collateral to credit facilities				$ 1,763,900,000
Deferred bond issuance costs				8,100,000		$ 6,300,000
Vessels under construction
Long-Term Debt, net
Interest expense capitalized				$ 11,400,000		17,400,000	$ 5,000,000
Vessels under construction subject to first preferred mortgages as collateral | item				5
BNP Paribas/Credit Agricole $130 mil. Facility
Long-Term Debt, net
Credit facility				$ 130,000,000		130,000,000
Syndicated $450.0 mil. Facility
Long-Term Debt, net
Credit facility				450,000,000				$ 450,000,000
Number of vessels pledged as collateral | item								8
Amount drawn				$ 181,000,000
Number of vessels delivered | item				3
Spread on variable rate				1.85%
Debt Instrument, Variable Interest Rate, Type [Extensible Enumeration]				us-gaap:SecuredOvernightFinancingRateSofrMember
Remaining borrowing availability				$ 269,000,000
Long-term debt				181,000,000
BNP Paribas/Credit Agricole $130 mil. Facility
Long-Term Debt, net
Credit facility				$ 130,000,000
Number of vessels pledged as collateral | item			6
Spread on variable rate			2.16%
Debt Instrument, Variable Interest Rate, Type [Extensible Enumeration]			us-gaap:SecuredOvernightFinancingRateSofrMember
Face amount of debt			$ 130,000,000
TEU of vessels pledged to loan | item			5,466
Balloon payment at maturity			$ 67,200,000
Term of debt			5 years
Minimum percentage of fair market value of collateral vessels required to cover loan value				125%
Long-term debt				$ 90,000,000		100,000,000
BNP Paribas/Credit Agricole $130 mil. Facility | Eight Quarterly Installment
Long-Term Debt, net
Amount of quarterly instalment			$ 5,000,000
BNP Paribas/Credit Agricole $130 mil. Facility | Twelve Quarterly Installments
Long-Term Debt, net
Amount of quarterly instalment			$ 1,900,000
Citibank/Natwest $815 mil. Facility
Long-Term Debt, net
Credit facility		$ 815,000,000		55,250,000			815,000,000
Credit facility debt extinguished		437,750,000
Citibank $382.5 mil. Revolving Credit Facility
Long-Term Debt, net
Credit facility		$ 382,500,000		382,500,000		382,500,000	$ 382,500,000
Amount drawn				0
Spread on variable rate		2%
Debt Instrument, Variable Interest Rate, Type [Extensible Enumeration]		us-gaap:SecuredOvernightFinancingRateSofrMember
Number of quarterly instalments | installment		20					20
Amount of quarterly instalment		$ 11,250,000
Balloon payment at maturity		$ 157,500,000					$ 157,500,000
Term of debt		5 years
Commitment fee payable (as a percent)		0.80%
Remaining borrowing availability				315,000,000
Citibank $382.5 mil. Revolving Credit Facility | BNP Paribas/Credit Agricole $130 mil. Facility
Long-Term Debt, net
Credit facility				382,500,000
Alpha Bank $55.25 mil. Facility
Long-Term Debt, net
Credit facility		$ 55,250,000		55,250,000		55,250,000	$ 55,250,000
Spread on variable rate		2.30%
Debt Instrument, Variable Interest Rate, Type [Extensible Enumeration]		us-gaap:SecuredOvernightFinancingRateSofrMember
Number of quarterly instalments | installment		20					20
Amount of quarterly instalment		$ 1,875,000
Balloon payment at maturity		$ 17,750,000					$ 17,750,000
Term of debt		5 years
Long-term debt				44,000,000		47,750,000
Senior unsecured notes
Long-Term Debt, net
Face amount of debt	$ 300,000,000
Fixed interest rate (as a percent)	8.50%
Percentage of principal amount redeemable from equity offering within 90 days of closing	35%
Redemption period of principal from closing of equity offering	90 days
Amount repurchased		$ 37,200,000					$ 37,200,000
Deferred bond issuance costs	$ 9,000,000
Long-term debt				$ 262,766,000		$ 262,766,000
Senior unsecured notes | On or after March 1, 2024
Long-Term Debt, net
Redemption price (as percent)	104.25%
Senior unsecured notes | On or after March 1, 2025
Long-Term Debt, net
Redemption price (as percent)	102.125%
Senior unsecured notes | On or after March 1, 2026
Long-Term Debt, net
Redemption price (as percent)	100%
Senior unsecured notes | 90 days after equity offering
Long-Term Debt, net
Redemption price (as percent)	108.50%
Alpha Bank $55.25 mil. Facility, Citibank $382.5 mil. Revolving Credit Facility and Syndicated $450.0 mil. Facility
Long-Term Debt, net
Minimum percentage of fair market value of collateral vessels required to cover loan value				120%
Alpha Bank $55.25 mil. Facility, Citibank $382.5 mil. Revolving Credit Facility, Syndicated $450.0 mil. Facility, and the BNP Paribas/Credit Agricole $130 mil. Facility
Long-Term Debt, net
Minimum liquidity				$ 30,000,000
Maximum leverage ratio				6.5
Minimum interest coverage ratio				2.5

Long-Term Debt, net - Maturitie

Long-Term Debt, net - Maturities (Details) $ in Thousands	Jun. 30, 2024 USD ($)
Scheduled maturities of long-term debt
June 30, 2025	$ 25,160
June 30, 2026	25,160
June 30, 2027	92,360
June 30, 2028	294,326
June 30, 2029	140,760
Total long-term debt	$ 577,766

Financial Instruments - Interes

Financial Instruments - Interest Rate Swap Hedges (Details) $ in Millions	6 Months Ended
	Jun. 30, 2024 USD ($) agreement	Jun. 30, 2023 USD ($)
Financial Instruments
Number of agreements held | agreement	0
Interest rate swap contracts
Financial Instruments
Unrealized losses reclassified from accumulated other comprehensive loss to earnings	$ 1.8	$ 1.8
Unrealized losses expected to be reclassified from accumulated other comprehensive loss to earnings within the next twelve months	$ 3.6

Financial Instruments - Fair Va

Financial Instruments - Fair Value (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Financial Instruments
Marketable securities	$ 99,232	$ 86,029
Fair Value
Financial Instruments
Cash and cash equivalents	372,446	271,809
Marketable securities	99,232	86,029
Book Value
Financial Instruments
Cash and cash equivalents	372,446	271,809
Marketable securities	99,232	86,029
Secured long-term debt, including current portion | Fair Value
Financial Instruments
Long-term debt	315,000	147,750
Secured long-term debt, including current portion | Book Value
Financial Instruments
Long-term debt	315,000	147,750
Unsecured long-term debt | Fair Value
Financial Instruments
Long-term debt	250,491	241,969
Unsecured long-term debt | Book Value
Financial Instruments
Long-term debt	$ 262,766	$ 262,766

Financial Instruments - Measure

Financial Instruments - Measured On Recurring Basis (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Financial Instruments
Marketable securities	$ 99,232	$ 86,029
(Level I)
Financial Instruments
Marketable securities	99,232
Fair Value
Financial Instruments
Marketable securities	$ 99,232	86,029
Fair Value | (Level I)
Financial Instruments
Marketable securities		$ 86,029

Financial Instruments - Not Mea

Financial Instruments - Not Measured On Recurring Basis (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Financial Instruments
Deferred finance costs, net	$ 8,100	$ 6,300
(Level I)
Financial Instruments
Cash and cash equivalents	372,446	271,809
(Level I) | Unsecured long-term debt
Financial Instruments
Long-term debt	250,491	241,969
(Level II) | Secured long-term debt, including current portion
Financial Instruments
Long-term debt	315,000	147,750
Fair Value
Financial Instruments
Cash and cash equivalents	372,446	271,809
Fair Value | Secured long-term debt, including current portion
Financial Instruments
Long-term debt	315,000	147,750
Fair Value | Unsecured long-term debt
Financial Instruments
Long-term debt	$ 250,491	$ 241,969

Stockholders' Equity (Details)

Stockholders' Equity (Details) $ / shares in Units, $ in Thousands		3 Months Ended				6 Months Ended		12 Months Ended
	Nov. 10, 2023 USD ($) $ / shares shares	Jun. 30, 2024 USD ($) $ / shares shares	Mar. 31, 2024 USD ($) $ / shares	Jun. 30, 2023 USD ($) $ / shares	Mar. 31, 2023 USD ($) $ / shares	Jun. 30, 2024 USD ($) director $ / shares shares	Jun. 30, 2023 USD ($) director $ / shares shares	Dec. 31, 2023 USD ($) shares	Dec. 31, 2022 USD ($) shares	Jun. 30, 2022 USD ($)
Stockholders' Equity
Dividend declared (in US$ per share) | $ / shares		$ 0.80	$ 0.80	$ 0.75	$ 0.75	$ 0.80	$ 0.75
Dividends, common stock in cash						$ 31,000	$ 30,400
Common shares issued | shares						11	20
Shares repurchase program authorized amount	$ 200,000									$ 100,000
Stock repurchase program authorized repurchase additional amount	$ 100,000
Value of shares repurchased		$ 1,091	$ 4,132	$ 33,766	$ 2,196
Total shares repurchased | shares		1,671,059				1,671,059
Amount of total shares repurchased		$ 104,400				$ 104,400
Maximum number of shares that may be granted | shares		1,000,000				1,000,000
Number of directors who elected to receive their compensation in shares | director						0	0
Open Market Purchases
Stockholders' Equity
Shares repurchased | shares						73,064		1,131,040	466,955
Value of shares repurchased						$ 5,200		$ 70,600	$ 28,600
Maximum
Stockholders' Equity
Shares repurchase program authorized amount										$ 100,000
Restricted stock
Stockholders' Equity
Shares issued and outstanding | shares		0				0
Manager
Stockholders' Equity
Shares granted | shares	100,000
Trading price of share used to calculate fair value shares granted (in dollars per share) | $ / shares	$ 63.40
Expenses representing fair value of the stock granted recognized expenses						$ 3,200
Amount expected to be recognized as expenses in 2024 and 2025		$ 6,300				$ 6,300
Manager | Vesting on december 31, 2024
Stockholders' Equity
Shares granted | shares	100,000
Manager | Vesting on december 31, 2025
Stockholders' Equity
Shares granted | shares	100,000

Lease Arrangements (Details)

Lease Arrangements (Details) $ in Thousands	1 Months Ended	6 Months Ended
	May 31, 2022 USD ($) item	Jun. 30, 2024 USD ($) item	Dec. 31, 2023 USD ($)
Lease Arrangements
Number of vessels , generated revenue results | item		70
Number of vessels under construction contracted with charter agreements | item		13
Number of charter vessels | item	15
Amount of charter hire prepayment received	$ 238,900
Current portion of unearned revenue		$ 51,528	$ 63,823
Non-current portion of unearned revenue		38,753	60,134
Future minimum payments, expected to be received
Remainder of 2024		445,414
2025		802,559
2026		626,893
2027		398,621
2028		170,368
2029		130,517
2030 and thereafter		114,879
Total future rentals		$ 2,689,251
Time Charter Agreements
Lease Arrangements
Lessor, Operating Lease, Existence of Option to Extend [true false]		true
Maximum term of the option to extend timer charter agreement		3 years
Current portion of unearned revenue		$ 43,600	44,200
Non-current portion of unearned revenue		$ 38,800	$ 60,100

Earnings per Share (Details)

Earnings per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2024	Mar. 31, 2024	Jun. 30, 2023	Mar. 31, 2023	Jun. 30, 2024	Jun. 30, 2023
Numerator:
Net income for the period	$ 141,152	$ 150,498	$ 147,021	$ 146,201	$ 291,650	$ 293,222
Denominator (number of shares in thousands):
Basic weighted average common shares outstanding	19,348		20,081		19,380	20,214
Effect of dilutive securities:
Dilutive effect of non-vested shares	172				172
Diluted weighted average common shares outstanding	19,520		20,081		19,552	20,214
Basic earnings per share (in dollars per share)	$ 7.30		$ 7.32		$ 15.05	$ 14.51
Diluted earnings per share (in dollars per share)	$ 7.23		$ 7.32		$ 14.92	$ 14.51

Related Party Transactions (Det

Related Party Transactions (Details) - USD ($)		6 Months Ended
	Nov. 10, 2023	Jun. 30, 2024	Jun. 30, 2023	Dec. 31, 2023
Related Party Transactions
Due from related parties		$ 46,795,000		$ 51,431,000
Prior service cost and periodic cost		715,000	$ 886,000
Due to executive officers		22,856,000		39,759,000
Manager
Related Party Transactions
Related Party Transaction, Annual Management Fee	$ 2,000,000
Related Party Transaction, Annual Management Fee, Shares	100,000
Daily vessel management fees for vessels on bareboat charter	$ 475
Daily vessel management fees for vessels on time charter	$ 950
Management fee on gross freight, charter hire, ballast bonus and demurrage (as a percent)	1.25%
Management fee based on the contract price of any vessel bought or sold (as a percent)	1%
Supervision fee per newbuilding vessel payable	$ 850,000	850,000
Amount capitalized		3,100,000		700,000
Supervision fees for vessels capitalized		2,100,000		3,000,000
Due from related parties		46,800,000		51,400,000
Manager | General and administrative expenses
Related Party Transactions
Management fees		13,900,000	10,500,000
Manager | Voyage expenses
Related Party Transactions
Commissions		5,900,000	5,700,000
Executive officer
Related Party Transactions
Prior service cost and periodic cost		700,000	$ 900,000
Other long-term liabilities | Executive officer
Related Party Transactions
Advances related to a defined benefit executive retirement plan		13,500,000		13,300,000
Accounts payable | Executive officer
Related Party Transactions
Due to executive officers		$ 100,000		$ 0

Operating Revenue (Details)

Operating Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023	Dec. 31, 2023
Operating Revenue
Revenues	$ 246,306	$ 241,479	$ 499,755	$ 485,053
Current portion of unearned revenue	51,528		51,528		$ 63,823
Time charters and bareboat charters
Operating Revenue
Revenues			476,853	$ 485,053
Voyage charters
Operating Revenue
Revenues			22,902
Accounts receivable	1,600		1,600		1,000
Current portion of unearned revenue	$ 0		$ 0		$ 2,000

Segments - Summary of the compa

Segments - Summary of the company's selected financial information (Details) $ in Thousands	3 Months Ended				6 Months Ended		12 Months Ended
	Jun. 30, 2024 USD ($)	Mar. 31, 2024 USD ($)	Jun. 30, 2023 USD ($)	Mar. 31, 2023 USD ($)	Jun. 30, 2024 USD ($) segment	Jun. 30, 2023 USD ($)	Dec. 31, 2023 USD ($)
Summary of the Company's selected financial information
Reporting segments | segment					2
Income Statement
Operating revenues	$ 246,306		$ 241,479		$ 499,755	$ 485,053
Voyage expenses	(12,678)		(8,399)		(33,020)	(16,282)
Vessel operating expenses	(47,090)		(41,861)		(90,204)	(82,500)
Depreciation	(35,380)		(31,910)		(69,243)	(63,439)
Amortization of deferred drydocking and special survey costs	(6,972)		(4,502)		(12,424)	(8,337)	$ (18,663)
Interest income	2,923		3,596		5,859	6,319
Interest expense	(5,106)		(5,881)		(8,230)	(12,603)
Net income per segment					274,669	290,110
Gain on investments, dividend income and equity loss on investments					16,981	3,112
Net Income	141,152	$ 150,498	$ 147,021	$ 146,201	291,650	293,222
Statement of Financial Position
Total assets per segment	3,947,061				3,947,061
Marketable securities	99,232				99,232		86,029
Investments in affiliates	64				64		270
Total assets	4,046,357				4,046,357		$ 3,661,136
Container vessels segment
Income Statement
Operating revenues					463,997	485,053
Voyage expenses					(16,741)	(16,282)
Vessel operating expenses					(79,430)	(82,500)
Depreciation					(65,255)	(63,439)
Amortization of deferred drydocking and special survey costs					(12,135)	(8,337)
Interest income					5,859	6,319
Interest expense					(8,230)	(12,603)
Net income per segment					272,042	$ 290,110
Statement of Financial Position
Total assets per segment	3,710,004				3,710,004
Drybulk vessels segment
Income Statement
Operating revenues					35,758
Voyage expenses					(16,279)
Vessel operating expenses					(10,774)
Depreciation					(3,988)
Amortization of deferred drydocking and special survey costs					(289)
Net income per segment					2,627
Statement of Financial Position
Total assets per segment	$ 237,057				$ 237,057

Subsequent Events (Details)

Subsequent Events (Details) $ / shares in Units, $ in Millions		1 Months Ended	3 Months Ended				6 Months Ended
	Aug. 02, 2024 USD ($) item	Jul. 31, 2024 USD ($) item $ / shares	Jun. 30, 2024 USD ($) $ / shares	Mar. 31, 2024 USD ($) $ / shares	Jun. 30, 2023 $ / shares	Mar. 31, 2023 $ / shares	Jun. 30, 2024 USD ($) $ / shares	Jun. 30, 2023 $ / shares
Subsequent Events
Dividend declared (in US$ per share) | $ / shares			$ 0.80	$ 0.80	$ 0.75	$ 0.75	$ 0.80	$ 0.75
Syndicated $450.0 mil. Facility
Subsequent Events
Credit facility			$ 450	$ 450			$ 450
Subsequent events | Syndicated $450.0 mil. Facility
Subsequent Events
Amount drawn from facility	$ 55
Credit facility	$ 450
Subsequent events | O 2024 H2 Dividends
Subsequent Events
Dividend declared (in US$ per share) | $ / shares		$ 0.80
Dividends payable, date to be paid		Aug. 29, 2024
Dividends payable, date of record		Aug. 20, 2024
Subsequent events | TEU newbuilding vessels
Subsequent Events
Number of TEU newbuilding vessels | item		3
TEU | item		9,200
Purchase price paid		$ 315
Subsequent events | TEU newbuilding vessels | Syndicated $450.0 mil. Facility
Subsequent Events
Number of TEU newbuilding vessels | item	1