Navigator (NVGS) 6-K 14 Aug 24 2024 Q2 Current report (foreign) Financial data

Cover Page

Cover Page	6 Months Ended
	Jun. 30, 2024
Cover [Abstract]
Document Type	6-K
Document Period End Date	Jun. 30, 2024
Entity Registrant Name	NAVIGATOR HOLDINGS LTD
Entity Central Index Key	0001581804
Current Fiscal Year End Date	--12-31
Document Fiscal Period Focus	Q2
Document Fiscal Year Focus	2024
Amendment Flag	false

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Current Assets
Cash, cash equivalents and restricted cash	$ 138,456	$ 158,242
Accounts receivable, net of allowance for credit losses	19,200	34,653
Accrued income	7,702	2,437
Prepaid expenses and other current assets	16,750	17,068
Bunkers and lubricant oils	12,643	9,044
Insurance receivable	2,757	526
Amounts due from related parties	25,278	33,402
Total current assets	222,786	255,372
Non-current Assets
Vessels, net	1,698,087	1,754,382
Property, plant and equipment, net	174	142
Intangible assets, net of accumulated amortization	284	332
Equity method investments	193,340	174,910
Derivative assets	12,647	14,674
Right-of-use asset for operating leases	2,322	2,873
Total non-current assets	1,906,854	1,947,313
Total Assets	2,129,640	2,202,685
Current Liabilities
Current portion of secured term loan facilities, net of deferred financing costs	118,450	120,327
Current portion of operating lease liabilities	1,234	914
Accounts payable	9,513	11,643
Accrued expenses and other liabilities	26,124	20,847
Accrued interest	5,137	5,488
Deferred income	25,596	25,617
Amounts due to related parties	505	606
Total current liabilities	186,559	185,442
Non-current Liabilities
Secured term loan facilities and revolving credit facilities, net of current portion and deferred financing costs	579,113	641,975
Senior unsecured bond, net of deferred financing costs	90,533	90,336
Operating lease liabilities, net of current portion	2,867	3,500
Deferred tax liabilities	8,404	7,016
Amounts due to related parties	38,088	41,342
Total non-current liabilities	719,005	784,169
Total Liabilities	905,564	969,611
Commitments and Contingencies - Note 11
Stockholders’ Equity
Common stock—$0.01 par value per share; 400,000,000 shares authorized; 69,595,255 shares issued and outstanding at June 30, 2024 (December 31, 2023: 73,208,586)	697	733
Additional paid-in capital	799,940	799,472
Accumulated other comprehensive loss	(444)	(152)
Retained earnings	375,135	390,221
Total Navigator Holdings Ltd. Stockholders’ Equity	1,175,328	1,190,274
Non-controlling interest	48,748	42,800
Total equity	1,224,076	1,233,074
Total Liabilities and Stockholders’ Equity	$ 2,129,640	$ 2,202,685

Condensed Consolidated Balanc_2

Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) - $ / shares	Jun. 30, 2024	Dec. 31, 2023
Statement of Financial Position [Abstract]
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	400,000,000	400,000,000
Common stock, shares issued (in shares)	69,595,255	73,208,586
Common stock, shares outstanding (in shares)	69,595,255	73,208,586

Condensed Consolidated Statemen

Condensed Consolidated Statements of Operations (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Revenues
Operating revenues	$ 131,601	$ 122,120	$ 252,621	$ 238,730
Operating revenues – Unigas Pool	15,075	13,060	28,210	25,252
Operating revenues – Luna Pool collaborative arrangements	0	155	0	7,355
Total operating revenue	146,676	135,335	280,831	271,337
Expenses
Brokerage commission	1,869	1,735	3,495	3,429
Voyage expenses	17,123	18,604	31,306	35,833
Voyage expenses – Luna Pool collaborative arrangements	0	514	0	5,542
Vessel operating expenses	43,494	42,999	85,612	84,671
Depreciation and amortization	33,349	32,190	66,790	64,021
General and administrative costs	11,320	8,223	17,800	14,978
Other income	0	0	0	(96)
(Profit)/loss from sale of vessel	0	(4,941)	0	(4,941)
Total operating expenses	107,155	99,324	205,003	203,437
Operating Income	39,521	36,011	75,828	67,900
Unrealized gain/(loss) on non-designated derivative instruments	(1,581)	3,195	(2,028)	(1,056)
Write off of deferred financing costs	0	0	0	(171)
Interest expense	(16,174)	(17,016)	(31,911)	(30,354)
Interest income	1,550	1,296	3,162	1,879
Income before taxes and share of result of equity method investments	23,316	23,486	45,051	38,198
Income taxes	(1,161)	(1,984)	(2,367)	(3,149)
Share of result of equity method investments	4,687	5,993	9,077	11,296
Net Income	26,842	27,495	51,761	46,345
Net income attributable to non-controlling interest	(3,602)	(889)	(5,948)	(953)
Net Income attributable to stockholders of Navigator Holdings Ltd.	$ 23,240	$ 26,606	$ 45,813	$ 45,392
Earnings per share attributable to stockholders of Navigator Holdings Ltd.:
Basic (in dollars per share)	$ 0.32	$ 0.36	$ 0.63	$ 0.61
Diluted (in dollars per share)	$ 0.32	$ 0.36	$ 0.62	$ 0.60
Weighted average number of shares outstanding in the period:
Basic (in shares)	72,458,773	73,745,894	72,834,272	74,847,093
Diluted (in shares)	72,883,133	74,329,162	73,320,149	75,321,626

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
Statement of Comprehensive Income [Abstract]
Net Income	$ 26,842	$ 27,495	$ 51,761	$ 46,345
Other comprehensive income:
Foreign currency translation (expense)/income	(326)	(113)	(292)	52
Total comprehensive income	26,516	27,382	51,469	46,397
Total comprehensive income attributable to:
Stockholders of Navigator Holdings Ltd.	22,914	26,493	45,521	45,444
Non-controlling interest	3,602	889	5,948	953
Total comprehensive income	$ 26,516	$ 27,382	$ 51,469	$ 46,397

Condensed Consolidated Statem_3

Condensed Consolidated Statements of Stockholders' Equity (Unaudited) - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Accumulated Other Comprehensive Income (Loss)	Retained Earnings	Non-Controlling Interest
Beginning balance (in shares) at Dec. 31, 2022		76,804,474
Beginning balance at Dec. 31, 2022	$ 1,173,412	$ 769	$ 798,188	$ (463)	$ 364,000	$ 10,918
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Restricted shares issued (in shares)		47,829
Restricted shares issued	1	$ 1
Net Income	46,345				45,392	953
Foreign currency translation	52			52
Investment by non-controlling interest	27,270					27,270
Repurchase of common stock (in shares)		(3,350,282)
Repurchase of common stock	(44,630)	$ (34)			(44,596)
Share-based compensation plan	609		609
Ending balance (in shares) at Jun. 30, 2023		73,502,021
Ending balance at Jun. 30, 2023	1,203,059	$ 736	798,797	(411)	364,796	39,141
Beginning balance (in shares) at Mar. 31, 2023		74,689,819
Beginning balance at Mar. 31, 2023	1,184,852	$ 747	798,368	(298)	354,700	31,335
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	27,495				26,606	889
Foreign currency translation	(113)			(113)
Investment by non-controlling interest	6,917					6,917
Repurchase of common stock (in shares)		(1,187,798)
Repurchase of common stock	(16,521)	$ (11)			(16,510)
Share-based compensation plan	429		429
Ending balance (in shares) at Jun. 30, 2023		73,502,021
Ending balance at Jun. 30, 2023	$ 1,203,059	$ 736	798,797	(411)	364,796	39,141
Beginning balance (in shares) at Dec. 31, 2023	73,208,586	73,208,586
Beginning balance at Dec. 31, 2023	$ 1,233,074	$ 733	799,472	(152)	390,221	42,800
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Restricted shares issued (in shares)		56,036
Restricted shares issued	1	$ 1
Net Income	51,761				45,813	5,948
Foreign currency translation	(292)			(292)
Dividend Paid	(7,312)				(7,312)
Repurchase of common stock (in shares)		(3,669,367)
Repurchase of common stock	(53,624)	$ (37)			(53,587)
Share-based compensation plan	$ 468		468
Ending balance (in shares) at Jun. 30, 2024	69,595,255	69,595,255
Ending balance at Jun. 30, 2024	$ 1,224,076	$ 697	799,940	(444)	375,135	48,748
Beginning balance (in shares) at Mar. 31, 2024		73,157,141
Beginning balance at Mar. 31, 2024	1,257,315	$ 733	799,561	(118)	411,993	45,146
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Restricted shares issued (in shares)		54,851
Restricted shares issued	1	$ 1
Net Income	26,842				23,240	3,602
Foreign currency translation	(326)			(326)
Dividend Paid	(7,312)				(7,312)
Repurchase of common stock (in shares)		(3,616,737)
Repurchase of common stock	(52,823)	$ (37)			(52,786)
Share-based compensation plan	$ 379		379
Ending balance (in shares) at Jun. 30, 2024	69,595,255	69,595,255
Ending balance at Jun. 30, 2024	$ 1,224,076	$ 697	$ 799,940	$ (444)	$ 375,135	$ 48,748

Condensed Consolidated Statem_4

Condensed Consolidated Statements of Stockholders' Equity (Unaudited) (Parenthetical) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023	Mar. 31, 2024	Dec. 31, 2023	Mar. 31, 2023	Dec. 31, 2022
Statement of Stockholders' Equity [Abstract]
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01	$ 0.01	$ 0.01	$ 0.01	$ 0.01	$ 0.01	$ 0.01
Net Income	$ 26,842	$ 27,495	$ 51,761	$ 46,345

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	Dec. 31, 2022
Cash flows from operating activities
Net Income	$ 26,842	$ 27,495	$ 51,761	$ 46,345
Adjustments to reconcile net income to net cash provided by operating activities
Unrealized loss on non-designated derivative instruments	1,581	(3,195)	2,028	1,056
Depreciation and amortization	33,349	32,190	66,790	64,021
Payment of drydocking costs			(9,929)	(4,327)
Profit from sale of vessel	0	(4,941)	0	(4,941)
Share-based compensation expense			468	609
Amortization of deferred financing costs			1,692	1,937
Share of results of equity method investments	(4,687)	(5,993)	(9,077)	(11,296)	$ (20,607)
Deferred taxes			1,393	0
Repayments under operating lease obligations			(320)	0
Other unrealized foreign exchange gain			(805)	(133)
Changes in operating assets and liabilities
Accounts receivable			15,452	(5,258)
Insurance claims receivables			(3,243)	(3,751)
Bunkers and lubricant oils			(3,600)	(2,147)
Accrued income and prepaid expenses and other current assets			(5,811)	(1,355)
Accounts payable, accrued interest, accrued expenses and other liabilities			1,586	1,260
Amounts due to/(from) related parties			8,124	(10,748)
Net cash provided by operating activities			116,509	71,272
Cash flows from investing activities
Additions to vessels and equipment			0	(191,727)
Contributions to equity method investments			(24,003)	(9,000)
Distributions from equity method investments			14,650	16,934
Purchase of other property, plant and equipment and intangibles			0	(129)
Net proceeds from sale of vessel			0	20,720
Insurance recoveries			1,011	2,601
Net cash used in investing activities			(8,342)	(160,601)
Cash flows from financing activities
Proceeds from secured term loan facilities and revolving credit facilities			0	323,561
Direct financing cost of secured term loan and revolving credit facilities			0	(3,548)
Repurchase of share capital			(53,587)	(44,594)
Repayment of secured term loan facilities and revolving credit facilities			(66,203)	(183,299)
Repayment of refinancing of vessel to related parties			(3,255)	(3,439)
Cash received from non-controlling interest			0	27,266
Dividends paid			(7,312)	0
Net cash (used in)/provided by financing activities			(130,357)	115,947
Effect of exchange rate changes on cash, cash equivalents and restricted cash			2,404	574
Net increase in cash, cash equivalents and restricted cash			(19,786)	27,192
Cash, cash equivalents and restricted cash at beginning of year	138,456	180,386	138,456	180,386	158,242	$ 153,194
Cash, cash equivalents and restricted cash at end of year	$ 138,456	$ 180,386	138,456	180,386	$ 158,242
Supplemental Information
Total interest paid during the period, net of amounts capitalized			28,112	26,236
Total tax paid during the period			$ 716	$ 1,004

General Information and Basis o

General Information and Basis of Presentation	6 Months Ended
	Jun. 30, 2024
Accounting Policies [Abstract]
General Information and Basis of Presentation	1. General Information and Basis of Presentation General Information Navigator Holdings Ltd. (the “Company”), the ultimate parent company of the Navigator Group of companies, is registered in the Republic of the Marshall Islands. The Company has a core business of owning and operating a fleet of liquefied gas carriers. As of June 30, 2024, the Company owned and operated 56 gas carriers (the “Vessels”) each having a cargo capacity of between 3,770 cbm and 38,000 cbm, of which 25 were ethylene and ethane-capable vessels. The Company entered into a joint venture (the “Navigator Greater Bay Joint Venture”) with Greater Bay Gas Co. Ltd. (“Greater Bay Gas”) in September 2022, which joint venture entity has acquired two 17,000 cbm, 2018-built ethylene-capable liquefied gas carriers and three 22,000 cbm, 2019-built ethylene capable liquefied gas carriers. The vessels are currently commercially managed through the in-house Luna Pool and technically managed by a third party, PG Shipmanagement of Singapore. The Company owns a 50% share, through a joint venture (the “Export Terminal Joint Venture”), of an ethylene export marine terminal at Morgan’s Point, Texas on the Houston Ship Channel ( the “Ethylene Export Terminal”), capable of exporting in excess of one million tons of ethylene per year. Unless the context otherwise requires, all references in the consolidated financial statements to “our”,” we” and “us” refer to the Company. Basis of Presentation These unaudited interim condensed consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America (“U.S. GAAP”) for interim financial information and related Securities and Exchange Commission (“SEC”) rules for interim financial reporting. Accordingly, they do not include all of the information and footnotes required by U.S. GAAP for complete financial statements. In our opinion, all adjustments consisting of normal recurring items, necessary for a fair statement of financial position, operating results and cash flows have been included in the unaudited interim condensed consolidated financial statements and related notes. The unaudited interim condensed consolidated financial statements and related notes should be read in conjunction with the audited consolidated financial statements and related notes for the year ended December 31, 2023 included in our Annual Report on Form 20-F filed with the SEC on March 27, 2024 (the “2023 Annual Report”). The year-end condensed balance sheet data was derived from the audited financial statements but does not include all disclosures required by accounting principles generally accepted in the United States of America. The results for the six months ended June 30, 2024, are not necessarily indicative of results for the year ending December 31, 2024, or any other future periods. The accompanying unaudited condensed consolidated financial statements include the accounts of the Company, its subsidiaries and variable interest entities (“VIE”) for which the Company is a primary beneficiary and are also consolidated (please read Note 14—Variable Interest Entities for additional information). All intercompany accounts and transactions have been eliminated on consolidation. The results of operations are subject to seasonal and other fluctuations and are therefore not necessarily indicative of results that may otherwise be expected for the entire year. Management has evaluated the Company’s ability to continue as a going concern and considered the conditions and events that could raise substantial doubt about the Company’s ability to continue as a going concern within 12 months after these financial statements are issued. As part of the assessment, management has considered the following: • our current financial condition and liquidity sources, including current funds available and forecasted future cash flows; • the severity and duration of any world events and armed conflicts, including the Russian-Ukraine war, conflicts in the Israel-Gaza region and the potential for broader conflict in the Middle East involving Iran and other nations, and associated repercussions to supply and demand for oil and gas and the economy generally as well as possible effects of trade disruptions; • environmental regulations such as those affecting vessels' Energy Efficiency Existing Ship Index (“EEXI”); and • the total capital contributions required for the Terminal Expansion Project (as defined below). Management has determined that it is appropriate to continue to adopt the going concern basis in preparing the financial statements. In September 2025, which is outside the 12-month going concern period, the Company has debt obligations falling due, including a $210 million secured term facility with a balloon repayment of $136.0 million and the maturity of our unsecured 2020 Bonds in an amount of $91 million. The Company is planning to refinance the secured term facility and the 2020 Bonds, however if t he Company’s refinancing efforts are not successful there could be a material adverse effect on the Company’s liquidity and its financial position. A discussion of the Company’s significant accounting policies can be found in the Company’s consolidated financial statements included in the Company's 2023 Annual Report. There have been no material changes to these policies in the six months ended June 30, 2024. Recent Accounting Pronouncements New accounting standards issued as of June 30, 2024 may affect future reporting by Navigator Holdings Ltd .

Operating Revenues

Operating Revenues	6 Months Ended
	Jun. 30, 2024
Revenue from Contract with Customer [Abstract]
Operating Revenues	2. Operating Revenues The following table discloses operating revenues by contract type for the three and six months ended June 30, 2024 and 2023: Three months ended June 30, 2023 Three months ended June 30, 2024 Six months ended June 30, 2023 Six months ended June 30, 2024 (in thousands) Time charters $ 78,319 $ 86,278 $ 154,711 $ 175,367 Voyage charters 43,801 45,323 84,019 77,254 Voyage charters from Luna Pool collaborative arrangement 155 — 7,355 — Operating revenues from Unigas Pool 13,060 15,075 25,252 28,210 Total operating revenues $ 135,335 $ 146,676 $ 271,337 $ 280,831 As of June 30, 2024, 32 of the Company’s 47 operated vessels (excluding the nine vessels operating within the independently managed Unigas Pool) were subject to time charters, 26 of which will expire within one year, five of which will expire within three years, and one of which will expire between three to five years from the balance sheet date (December 31, 2023: 38 of the Company’s 47 operated vessels were subject to time charters, 27 of which will expire within one year, five of which will expire within three years and six of which will expire between three to five years). The estimated undiscounted cash flows for committed time charter revenues that are expected to be received on an annual basis for ongoing time charters, as of June 30, 2024, are as follows: (in thousands of U.S. dollars) Within 1 year 196,750 In the second year 64,995 In the third year 17,113 In the fourth year 1,177 For time charter revenues accounted for under ASC 842, the amount of accrued income on the Company’s unaudited condensed consolidated balance sheet as of June 30, 2024, was $0.9 million (December 31, 2023: $1.0 million). The amount of hire payments received in advance under time charter contracts, recognized as a liability and reflected within deferred income on the Company’s unaudited condensed consolidated balance sheet as of June 30, 2024, was $25.6 million (December 31, 2023: $25.6 million). Deferred income allocated to time charters will be recognized ratably over time, which is expected to be within one month from June 30, 2024. Voyage Charter revenues Voyage charter revenues, which include revenues from contracts of affreightment, are shown net of address commissions. As of June 30, 2024, for voyage charters and contracts of affreightment services accounted for under ASC 606, the amount of contract assets reflected within accrued income on the Company’s unaudited condensed consolidated balance sheet was $6.8 million (December 31, 2023: $1.3 million). Changes in the contract asset balance at the balance sheet dates reflect income accrued after loading of the cargo commences but before an invoice has been raised to the charterer, as well as changes in the number of the Company’s vessels contracted under voyage charters or contracts of affreightment. The period opening and closing balance of receivables from voyage charters, including contracts of affreightment, was $18.3 million and $6.9 million, respectively, as of June 30, 2024 (December 31, 2023: $5.1 million and $18.3 million, respectively) and is reflected within net accounts receivable on the Company’s unaudited condensed consolidated balance sheet. The amount allocated to costs incurred to fulfill a contract with a charterer, which are costs incurred following the commencement of a contract or charter party but before the loading of the cargo commences, was $1.1 million as of June 30, 2024 (December 31, 2023: $1.0 million) and is reflected within prepaid expenses and other current assets on the Company’s unaudited condensed consolidated balance sheet. Voyage and Time charter revenues from Luna Pool collaborative arrangements

Vessels

Vessels	6 Months Ended
	Jun. 30, 2024
Property, Plant and Equipment [Abstract]
Vessels	3. Vessels Vessels Drydocking Total (in thousands) Cost January 1, 2024 $ 2,467,396 $ 69,938 $ 2,537,334 Additions — 10,398 10,398 Write-offs of fully amortized assets — (5,319) (5,319) June 30, 2024 2,467,396 75,017 2,542,413 Accumulated Depreciation January 1, 2024 743,334 39,618 782,952 Charge for the period 55,504 11,189 66,693 Write-offs of fully amortized assets — (5,319) (5,319) June 30, 2024 798,838 45,488 844,326 Net Book Value December 31, 2023 1,724,062 30,320 1,754,382 June 30, 2024 $ 1,668,558 $ 29,529 $ 1,698,087 The cost and net book value of the 32 vessels that were contracted under time charter arrangements (please read Note 2—Operating Revenue for additional information) was $1,670.7 million and $1,090.9 million, respectively, as of June 30, 2024 (December 31, 2023: $1,776.0 million and $1,236.0 million, respectively, for 34 vessels contracted under time charters). The net book value of vessels that serve as collateral for the Company’s secured term loan and revolving credit facilities (please read Note 5—Secured Term Loan Facilities and Revolving Credit Facilities, for additional information) was $1,363.6 million as of June 30, 2024 (December 31, 2023: $1,420.9 million). The cost and net book value of vessels that are owned by lessor VIEs and which are included in the table above (please read Note 14—Variable Interest Entities for additional information) were $83.6 million and $60.8 million, respectively, as of June 30, 2024 (December 31, 2023: $83.6 million and $66.1 million, respectively).

Equity Method Investments

Equity Method Investments	6 Months Ended
	Jun. 30, 2024
Equity Method Investments and Joint Ventures [Abstract]
Equity Method Investments	4. Equity Method Investments Interests in investments are accounted for using the equity method and are recognized initially at cost and subsequently include the Company’s share of the profit or loss and other comprehensive income of the equity-accounted investees. We disclose our proportionate share of profits and losses from equity method unconsolidated affiliates in the statement of operations and adjust the carrying amount of our equity method investments on the balance sheet accordingly. Share of results from equity method investments, excluding amortized costs, recognized in the share of results of equity method investments for the six months ended June 30, 2024, was $9.2 million (six months ended June 30, 2023: $11.3 million). As of December 31, 2023, and June 30, 2024, we had the following participation in investments that are accounted for using the equity method: December 31, 2023 June 30, 2024 Enterprise Navigator Ethylene Terminal L.L.C. (“Export Terminal Joint Venture”) 50 % 50 % Unigas International B.V. (“Unigas”) 33.3 % 33.3 % Dan Unity CO2 A/S 50 % 50 % Luna Pool Agency Limited (“Pool Agency”) 50 % 50 % Azane Fuel Solutions AS ("Azane") 14.5 % 14.5 % Bluestreak CO2 Limited ("Bluestreak") 50 % 50 % The table below shows the movement in the Company’s equity method investments, for the year ended December 31, 2023, and six months ended June 30, 2024: Year ended December 31, 2023 Six months ended June 30, 2024 (in thousands) Equity method investments at January 1, 2023 and 2024 $ 148,534 $ 174,910 Share of results 20,607 9,077 Distributions received from equity method investments (30,790) (14,650) Equity contributions to joint venture entity 35,000 24,003 Equity method investments – additions 1,559 — Total equity method investments at December 31, 2023 and June 30, 2024 $ 174,910 $ 193,340 Enterprise Navigator Ethylene Terminal L.L.C. (“Export Terminal Joint Venture”) In January 2018, the Company entered into definitive agreements creating the Export Terminal Joint Venture. As of June 30, 2024, we had contributed $214.5 million to the Export Terminal Joint Venture being our total share of the capital cost for the construction of the Ethylene Export Terminal and the ongoing Terminal Expansion Project. Cumulative interest and associated costs capitalized on our investment in the Ethylene Export Terminal are being amortized over the estimated useful life of the Ethylene Export Terminal, which began commercial operations with the export of commissioning cargoes in December 2019. As of June 30, 2024 the unamortized difference between the carrying amount of the investment in the Export Terminal Joint Venture and the amount of the Company’s underlying equity in net assets of the Export Terminal Joint Venture was $5.4 million (December 31, 2023: $5.6 million). The costs amortized in both the six months ended June 30, 2024, and 2023, was $0.2 million and this is presented in the share of results of the equity method investments within our consolidated statements of operations. Unigas International B.V. ("Unigas B.V.") Unigas B.V. based in the Netherlands is an independent commercial and operational manager of seagoing vessels capable of carrying liquefied petrochemical and petroleum gases on a worldwide basis. Unigas B.V. is the operator of the Unigas pool. The Company owns a 33.3% equity interest in Unigas B.V. and accounts for it using the equity method. It was recognized initially at fair value and subsequent to initial recognition the consolidated financial statements will include the Company’s share of the profit or loss and other comprehensive income. Dan Unity CO2 A/S ("Dan Unity") In June 2021, one of the Company’s subsidiaries entered into a shareholder agreement creating joint venture Dan Unity CO2 A/S, a Danish entity, to undertake commercial and technical projects relating to seaborne transportation of CO2. We account for our investment using the equity method and we exercise joint control over the operating and financial policies of Dan Unity CO2 A/S. As of June 30, 2024, we have recognized the Company’s initial investment at cost along with the Company’s share of the profit or loss and other comprehensive income of equity accounted investees. Luna Pool Agency Limited ("Pool Agency") In March 2020, the Company collaborated with Pacific Gas Pte. Ltd. and Greater Bay Gas Co. Ltd. ("Greater Bay Gas”) to form and manage the Luna Pool. As part of the formation, Luna Pool Agency Limited (the “Pool Agency”) was incorporated in May 2020. The pool participants jointly own the Pool Agency on an equal basis, and both have equal board representation. As of June 30, 2024, we have recognized the Company’s initial investment of one British pound in the Pool Agency within equity method investments on our consolidated balance sheet. The Pool Agency has no activities other than as a legal custodian of the Luna Pool bank account and there will be no variability in its financial results as it has no income and its minimal operating expenses are reimbursed by the Pool Participants. Azane Fuel Solutions AS ("Azane") Azane, a joint venture between ECONNECT Energy AS and Amon Maritime AS, both of Norway, was founded in Norway in 2020 as a company that develops proprietary technology and services for ammonia fuel handling to facilitate the transition to green fuels for shipping. The Company acquired a 14.5% equity interest in Azane on October 25, 2023. It was recognized initially at cost. Subject to customary conditions, Azane intends to build the world’s first ammonia bunkering network, with Yara Clean Ammonia ("Yara") already pre-ordering 15 units from Azane. The first green ammonia bunkering units are scheduled to be delivered in 2025 enabling a low-carbon fuel offering to shipowners. The investment made by Yara and Navigator is expected to enable Azane to begin construction of its first bunkering unit for ammonia supply in Norway, aiming to kickstart the transition to zero-carbon fuels for maritime transportation. Future value creation for Azane is expected to come through international expansion with its bunkering solutions and the broadening of its offerings in ammonia fuel handling technology. Bluestreak CO2 Limited ("Bluestreak")

Secured Term Loan Facilities an

Secured Term Loan Facilities and Revolving Credit Facilities	6 Months Ended
	Jun. 30, 2024
Debt Disclosure [Abstract]
Secured Term Loan Facilities and Revolving Credit Facilities	5. Secured Term Loan Facilities and Revolving Credit Facilities The following table shows the breakdown of all secured term loan facilities, revolving credit facilities and total deferred financing costs split between current and non-current liabilities at December 31, 2023 and June 30, 2024: December 31, 2023 June 30, 2024 (in thousands) Current Liability Current portion of secured term loan facilities and revolving credit facilities $ 123,024 $ 120,815 Less: current portion of deferred financing costs (2,697) (2,365) Current portion of secured term loan facilities and revolving credit facilities, net of deferred financing costs $ 120,327 $ 118,450 Non-Current Liability Secured term loan facilities and revolving credit facilities net of current portion, excluding amount due to related parties $ 646,131 $ 582,139 Amount due to related parties* 41,342 38,088 Less: non-current portion of deferred financing costs (4,156) (3,026) Non-current secured term loan facilities and revolving credit facilities, net of current portion and non-current deferred financing costs $ 683,317 $ 617,201 *Amount due to related parties relates to the Navigator Aurora Facility held within a lessor entity (for which legal ownership resides with a financial institution) that we are required to consolidate as a variable interest entity under U.S. GAAP into our financial statements.

Senior Unsecured Bonds

Senior Unsecured Bonds	6 Months Ended
	Jun. 30, 2024
Debt Disclosure [Abstract]
Senior Unsecured Bonds	6. Senior Unsecured Bonds In September 2020, the Company issued senior unsecured bonds in an aggregate principal amount of $100 million with Nordic Trustee AS as the bond trustee (the “2020 Bonds”). The net proceeds of the issuance of the 2020 Bonds were used to redeem in full previously issued bonds. The 2020 Bonds are governed by Norwegian law and listed on the Nordic ABM which is operated and organized by Oslo Børs ASA. The 2020 Bonds bear interest at a rate of 8.0% per annum and mature on September 10, 2025. Interest is payable semi-annually in arrears on March 10 and September 10. The following table shows the breakdown of our senior unsecured bonds and total deferred financing costs as of December 31, 2023 and June 30, 2024: December 31, 2023 June 30, 2024 (in thousands) Total bonds cost $ 100,000 $ 100,000 Less Treasury bonds* (9,000) (9,000) Less deferred financing costs (664) (467) Total bonds, net of deferred financing costs $ 90,336 $ 90,533 * In September 2023, we purchased $9.0 million of the 2020 Bonds in the open market using cash on hand. These purchased 2020 Bonds have not been cancelled or redeemed and the Company intends to hold the bonds to maturity.

Derivative Instruments Accounte

Derivative Instruments Accounted for at Fair Value	6 Months Ended
	Jun. 30, 2024
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Instruments Accounted for at Fair Value	7. Derivative Instruments Accounted for at Fair Value The following table includes the estimated fair value of those assets and liabilities that are measured at fair value on a recurring basis as of December 31, 2023 and June 30, 2024. December 31, 2023 June 30, 2024 (in thousands) Fair Value Hierarchy Level Fair Value Asset Fair Value Asset Interest rate swap agreements Level 2 $14,674 $12,647 The Company uses derivative instruments in accordance with its overall risk management policy to mitigate the risk of unfavorable fluctuations in foreign exchange and interest rate movements. The Company held no derivatives designated as hedges as of December 31, 2023 or June 30, 2024. Fair value is a market-based measurement that is determined based on assumptions that market participants would use in pricing an asset or a liability. The fair value accounting standard establishes a three-tier fair value hierarchy, which prioritizes the inputs used in the valuation methodologies in measuring fair value: Level 1—Observable inputs that reflect quoted prices (unadjusted) for identical assets or liabilities in active markets. Level 2—Include other inputs that are directly or indirectly observable in the marketplace. Level 3—Unobservable inputs which are supported by little or no market activity. Interest Rate risk The Company has a number of existing vessel loan facilities with associated fixed interest rate swaps. As of June 30, 2024, the interest rate swaps had a positive fair value to the Company of $12.6 million (December 31, 2023, a positive fair value to the Company of $14.7 million). There were unrealized losses of $1.6 million on the fair value of the swaps for the three months ended June 30, 2024 (three months ended June 30, 2023, an unrealized gain of $3.2 million). There were unrealized losses of $2.0 million on the fair value of the swaps for the six months ended June 30, 2024 (six months ended June 30, 2023, an unrealized loss of $1.1 million). These fixed interest rate swaps are typically entered into with the financial institutions which are lenders under on the loan facilities. The interest rate payable by the Company under these interest rate swap agreements is between 0.3615% and 2.137%. The interest rate receivable by the Company under these interest rate swap agreements is 3-month SOFR, calculated on a 360-day year basis and which resets every three months. All interest rate swaps above are remeasured to fair value at each reporting date and have been categorized as level two on the fair value measurement hierarchy. The remeasurement to fair value has no impact on the cash flows at the reporting date. There is no requirement for cash collateral to be placed with the swap providers under these swap agreements and there is no effect on restricted cash as of June 30, 2024. Foreign Currency Exchange Rate risk All foreign currency-denominated monetary assets and liabilities are revalued and are reported in the Company’s functional currency based on the prevailing exchange rate at the end of the period. These foreign currency transactions fluctuate based on the strength of the U.S. Dollar. The remeasurement of all foreign currency-denominated monetary assets and liabilities at each reporting date results in unrealized foreign currency exchange differences which do not impact our cash flows. Credit risk The Company is exposed to credit losses in the event of non-performance by the counterparties to its interest rate swap agreements. As of June 30, 2024, the Company is exposed to credit risk as the interest rate swaps were in an asset position from the perspective of the Company. In order to minimize counterparty risk, the Company only enters into derivative transactions with counterparties that are reputable financial institutions, highly rated by a recognized rating agency. The fair value of our interest rate swap agreements is the estimated amount that we would pay/receive to sell or transfer the swap at the reporting date, taking into account current interest rates and the current credit worthiness of the swap counterparties. The estimated amount is the present value of future cash flows, adjusted for credit risk. The Company transacts all of these derivative instruments through investment-grade rated financial institutions at the time of the transaction. The amount recorded as a derivative asset or liability could vary by a material amount in the near term if credit markets are volatile or if credit risk were to change significantly. The fair value of our interest rate swap agreements at the end of each period is most significantly affected by the interest rate implied by the benchmark interest yield curve, including its relative steepness. Interest rates and foreign exchange rates have experienced significant volatility in recent years in both the short and long term. While the fair value of our swap agreements is typically more sensitive to changes in short-term rates, significant changes in long-term benchmark interest, foreign exchange rates and the credit risk of the counterparties of the Company also materially impact the fair values of our swap agreements.

Fair Value of Financial Instrum

Fair Value of Financial Instruments Not Accounted For at Fair Value	6 Months Ended
	Jun. 30, 2024
Fair Value Disclosures [Abstract]
Fair Value of Financial Instruments Not Accounted For at Fair Value	8. Fair Value of Financial Instruments Not Accounted for at Fair Value The principal financial assets of the Company as of June 30, 2024, and December 31, 2023, consist of cash, cash equivalents, and restricted cash and accounts receivable. The principal financial liabilities of the Company as of June 30, 2024, and December 31, 2023, consist of accounts payable, accrued expenses and other liabilities, secured term loan facilities, revolving credit facilities and the 2020 Bonds and do not include deferred financing costs. The carrying values of cash, cash equivalents and restricted cash, accounts receivable, accounts payable, accrued expenses and other liabilities are reasonable estimates of their fair value due to the short-term nature or liquidity of these financial instruments. Fair value is a market-based measurement that is determined based on assumptions that market participants would use in pricing an asset or a liability. The fair value accounting standard establishes a three-tier fair value hierarchy, which prioritizes the inputs used in the valuation methodologies in measuring fair value: Level 1—Observable inputs that reflect quoted prices (unadjusted) for identical assets or liabilities in active markets. Level 2—Include other inputs that are directly or indirectly observable in the marketplace. Level 3—Unobservable inputs which are supported by little or no market activity. The 2020 Bonds are classified as a level two liability and the fair values have been calculated based on the most recent trades of the bond on the Oslo Børs prior to June 30, 2024. These trades are infrequent and therefore not considered to be an active market. The fair value of secured term loan facilities and revolving credit facilities is estimated to approximate the carrying value in the balance sheet since they bear a variable interest rate, which is reset quarterly. This has been categorized at level two on the fair value measurement hierarchy as of June 30, 2024. The following table includes the estimated fair value and carrying value of those assets and liabilities where the fair value approximate carrying value. The table excludes cash, cash equivalents, restricted cash, accounts receivable, accounts payable, accrued expenses and other liabilities because the fair value approximates carrying value and, for accounts receivable and payable, are due in one year or less. December 31, 2023 June 30, 2024 (in thousands) Fair Value Hierarchy Level Carrying Amount (Liability) Fair Value (Liability) Fair Value Hierarchy Level Carrying Fair Value (Liability) 2020 Bonds (Note 6) Level 2 $ (91,000) $ (91,455) Level 2 $ (91,000) $ (91,114) Secured term loan facilities and revolving credit facilities (Note 5) Level 2 $ (810,497) $ (810,497) Level 2 $ (741,042) $ (741,042)

Earnings per share

Earnings per share	6 Months Ended
	Jun. 30, 2024
Earnings Per Share [Abstract]
Earnings per share	9. Earnings per share Basic earnings per share is calculated by dividing the net income available to common stockholders by the weighted average number of common shares outstanding during the period. Diluted earnings per share is calculated by adjusting the weighted average number of common shares used for calculating basic earnings per share for the effects of all potentially dilutive shares. The following table shows the calculation of both the basic and diluted number of weighted average outstanding shares for the three and six months ended June 30, 2024 and 2023: Three months ended Three months ended Six months ended June 30, 2023 Six months ended June 30, 2024 Net Income attributable to stockholders of Navigator Holdings Ltd.(in thousands) $ 26,606 $ 23,240 $ 45,392 $ 45,813 Basic weighted average number of shares: 73,745,894 72,458,773 74,847,093 72,834,272 Effect of dilutive potential share options: 583,268 424,360 474,533 485,877 Diluted weighted average number of shares 74,329,162 72,883,133 75,321,626 73,320,149 Earnings per share attributable to stockholders of Navigator Holdings Ltd.: Basic earnings per share $ 0.36 $ 0.32 $ 0.61 $ 0.63 Diluted earnings per share $ 0.36 $ 0.32 $ 0.60 $ 0.62

Share-Based Compensation

Share-Based Compensation	6 Months Ended
	Jun. 30, 2024
Share-Based Payment Arrangement [Abstract]
Share-Based Compensation	10. Share-Based Compensation Share Awards On April 15, 2024, under the Navigator Holdings Ltd. 2023 Long-Term Incentive Plan (the “2023 Plan”) the Company granted a total of 54,851 restricted shares, 41,291 of which were granted to non-employee directors and 13,560 of which were granted to the officers and employees of the Company. The weighted average value of the 54,851 shares granted was $15.03 per share. The restricted shares granted to the non-employee directors vest on the first anniversary of the grant date and the restricted shares granted to the officers and employees of the Company vest on the third anniversary of the grant date. On March 17, 2024 under the Navigator Holdings Ltd. 2013 Long-Term Incentive Plan (the “2013 Plan”), 31,833 shares which were previously granted to non-employee directors under the 2013 Plan with a weighted average grant value of $12.45 per share, vested at a fair value of $487,045. In addition, on March 17, 2024, 10,111 shares which were granted in 2021 to officers and employees of the Company, all of which had a weighted average grant value of $10.26, vested at a fair value of $154,698. On June 30, 2023, 15,627 shares, which were previously granted to an officer of the Company under the 2013 Plan with a weighted average grant value of $9.84 per share, were accelerated to vesting at a fair value of $203,307. On March 17, 2023, 45,864 shares which were previously granted to non-employee directors under the 2013 Plan with a weighted average grant value of $10.65 per share, vested at a fair value of $553,120. In addition, on March 19, 2023, 12,159 shares which were granted in 2020 to officers and employees of the Company, all of which had a weighted average grant value of $7.90 vested at a fair value of $157,581. On March 15, 2023, under the 2013 Plan the Company granted a total of 47,829 restricted shares, 36,327 of which were granted to non-employee directors and 11,502 of which were granted to the officers and employees of the Company. The weighted average value of the shares granted was $12.45 per share. The restricted shares granted to the non-employee directors vest on the first anniversary of the grant date and the restricted shares granted to the officers and employees of the Company vest on the third anniversary of the grant date. Restricted share grant activity for the year ended December 31, 2023, and the six months ended June 30, 2024, was as follows: Number of non-vested restricted shares Weighted average grant date fair value Weighted average remaining contractual term (years) Balance as of January 1, 2023 115,693 $ 10.16 1.04 Granted 47,829 12.45 Vested (78,144) 10.16 Balance as of December 31, 2023 85,378 11.44 0.81 Granted 54,851 15.03 Vested (41,944) 11.92 Balance as of June 30, 2024 98,285 $ 13.24 1.12 We account for forfeitures as they occur. Using the graded straight-line method of expensing the restricted stock grants, the weighted average estimated value of the shares calculated at the date of grant is recognized as compensation cost in the unaudited condensed consolidated statement of operations over the period to the vesting date. During the six months ended June 30, 2024, the Company recognized $281,557 in share-based compensation costs relating to share grants (six months ended June 30, 2023: $457,751). As of June 30, 2024, there was a total of $717,882 unrecognized compensation costs relating to the expected future vesting of share-based awards (December 31, 2023: $400,282) which are expected to be recognized over a weighted average period of 1.12 years (December 31, 2023: 0.81 years). Share options Share options issued under the 2013 Plan are exercisable between the third and tenth anniversary of the grant date, after which they lapse. The fair value of any option issued is calculated on the date of the grant based on the Black-Scholes valuation model. Expected volatility is based on the historic volatility of the Company’s stock price and other factors. The expected term of the options granted is anticipated to occur in the range between 4 and 6.5 years. The risk-free rate is the rate adopted from the U.S. Government Zero Coupon Bond. The movements in the outstanding share options during the year ended December 31, 2023, and the six months ended June 30, 2024, were as follows: Number of options outstanding Weighted average exercise price per share Aggregate intrinsic value 5 Balance as of January 1, 2023 $ 320,856 $ 20.99 $ — Forfeited during the year (35,875) 22.35 — Issuance during the year 262,412 15.45 — Balance as of December 31, 2023 547,393 18.25 53,100 Expired during the period (143,538) 24.29 — Balance as of June 30, 2024 $ 403,855 $ 16.10 $ 609,648 The weighted-average remaining contractual term of options outstanding and exercisable at June 30, 2024 was 3.49 years (December 31, 2023: 2.99 years). During the six months ended June 30, 2024, the Company recognized $69,405 in share-based compensation costs relating to options granted under the 2013 Plan (six months ended June 30, 2023: a charge of $121,078 relating to options granted under the 2013 Plan). As of June 30, 2024 there was $1,693,100 of total unrecognized compensation costs relating to non-vested options under the 2013 Plan (December 31, 2023: $1,142,618). As of June 30, 2024, there were 131,443 share options that had vested but had not been exercised with an weighted average exercise price of $18.21 (As of December 31, 2023, there were 274,981 share options that had vested but had not been exercised with an weighted average exercise price of $21.38). The Company has employee stock purchase plans in place which is a savings-related share scheme where certain employees have the option to buy common stock at a 15% discount to the share price at the grant dates of July 9, 2021,August 8, 2022 and August 22, 2023. The employee stock purchase plans have three-year vesting periods, which will end on July 9, 2024, August 10, 2025 and August 22, 2026. 1,185 shares have been issued since the inception of the scheme. Using the Black-Scholes valuation model, the Company recognized compensation costs of $34,186 relating to employee stock purchase plans for the six months ended June 30, 2024 (six months ended June 30, 2023: $30,085).

Commitments and Contingencies

Commitments and Contingencies	6 Months Ended
	Jun. 30, 2024
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	11. Commitments and Contingencies The schedule below summarizes our contractual obligations as of June 30, 2024. 2024 2025 2026 2027 2028 Thereafter Total (in thousands) Secured term loan facilities and revolving credit facilities $ 61,567 $ 292,616 $ 107,216 $ 67,539 $ 89,186 $ 84,830 $ 702,954 Ethylene Export Terminal capital contributions 1 70,931 — — — — — 70,931 2020 Bonds — 100,000 — — — — 100,000 Office operating leases 2 680 1,266 1,058 1,267 — — 4,271 Navigator Aurora Facility 3 — — — 38,088 — — 38,088 Total contractual obligations $ 133,178 $ 393,882 $ 108,274 $ 106,894 $ 89,186 $ 84,830 $ 916,244 1 We have committed to invest further in terminal infrastructure, such as expanding our existing Ethylene Export Terminal. As at June 30, 2024 the remaining capital contributions required from us to the Export Terminal Joint Venture for the Terminal Expansion Project are expected to be approximately $71 million. 2 The Company occupies office space in London with a lease that commenced in January 2022 for a period of 10 years with a mutual break option in January 2027, which is the fifth anniversary of the lease commencement date. The annual gross rent under this lease is approximately $1.1 million, with an initial rent-free period of 27 months, of which 13 months of the rent free period is repayable in the event that the break option is exercised. The Company entered into a lease for office space in Houston that expires on March 31, 2025. The annual gross rent under this lease is approximately $60,000. The lease term for our representative office in Gdynia, Poland was revised during 2021 for an amended period to May 31, 2025. The gross rent per year is approximately $64,000. The Company occupies office space in Copenhagen, Denmark with a lease that commenced in September 2021 that expires in June 2025. The gross rent per year is approximately $180,000. The weighted average remaining contractual lease term for the above four office leases on June 30, 2024, was 2.47 years (December 31, 2023: 3.88 years). 3

Operating Lease Liabilities

Operating Lease Liabilities	6 Months Ended
	Jun. 30, 2024
Leases [Abstract]
Operating Lease Liabilities	12. Operating Lease Liabilities The Company’s unaudited condensed consolidated balance sheet includes a right-of-use (“ROU”) asset and a corresponding liability for operating lease contracts where the Company is a lessee. The discount rate used to measure the lease liability presented on the Company’s unaudited condensed consolidated balance sheet is the incremental cost of borrowing since the rate implicit in the lease cannot be determined. The liabilities described below are for the Company’s offices in London, Gdynia, Copenhagen and Houston which are denominated in various currencies. At June 30, 2024, the weighted average discount rate across the four leases was 2.93% (December 31, 2023: 2.95%). At June 30, 2024, based on the remaining lease liabilities, the weighted average remaining operating lease term was 2.46 years (December 31, 2023: 3.17 years ). Under ASC 842, the ROU asset is a non-monetary asset and is remeasured into the Company’s reporting currency using the exchange rate for the applicable currency as at the adoption date of ASC 842. The operating lease liability is a monetary liability and is remeasured quarterly using current exchange rates, with changes recognized in a manner consistent with other foreign currency-denominated liabilities within general and administrative expenses in the unaudited condensed consolidated statements of comprehensive income. A maturity analysis of the annual undiscounted cash flows of the Company’s operating lease liabilities as of December 31, 2023 and June 30, 2024, is presented in the following table: December 31, 2023 June 30, 2024 (in thousands) One year $ 1,027 $ 1,327 Two years 1,279 1,143 Three years 1,066 1,801 Four years 1,274 — Total undiscounted operating lease commitments 4,646 4,271 Less: Discount adjustment (232) (170) Total operating lease liabilities 4,414 4,101 Less: current portion (914) (1,234) Operating lease liabilities, non-current portion $ 3,500 $ 2,867

Cash, Cash Equivalents and Rest

Cash, Cash Equivalents and Restricted Cash	6 Months Ended
	Jun. 30, 2024
Cash and Cash Equivalents [Abstract]
Cash, Cash Equivalents and Restricted Cash	13. Cash, Cash Equivalents and Restricted Cash The following table shows the breakdown of cash, cash equivalents and restricted cash as of December 31, 2023 and June 30, 2024: December 31, 2023 June 30, 2024 (in thousands) Cash and cash equivalents $ 149,581 $ 128,703 Cash and cash equivalents held by VIE 23 411 Restricted cash 8,638 9,342 Total cash, cash equivalents and restricted cash $ 158,242 $ 138,456

Variable Interest Entities

Variable Interest Entities	6 Months Ended
	Jun. 30, 2024
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Variable Interest Entities	Variable Interest Entities As of December 31, 2023 and June 30, 2024, the Company has consolidated 100% of PT Navigator Khatulistiwa, a VIE for which the Company is deemed to be the primary beneficiary, i.e. it has a controlling financial interest in this entity with the power to direct the activities that most significantly impact the entity’s economic performance and has the right to residual gains or the obligation to absorb losses that could potentially be significant to the VIE. The Company owns 49% of PT Navigator Khatulistiwa common stock, all of its secured debt and has voting control. All economic interests in the residual net assets reside with the Company. By virtue of the accounting principle of consolidation, transactions between PT Navigator Khatulistiwa and the Company are eliminated on consolidation. In October 2019, the Company entered into a sale and leaseback to refinance one of its vessels , Navigator Aurora, with OCY Aurora Ltd., a Maltese limited liability company. OCY Aurora Ltd. is a wholly owned subsidiary of Ocean Yield Malta Limited, whose parent is Ocean Yield ASA, a listed company on the Oslo stock exchange. The Company does not hold any shares or voting rights in OCY Aurora Ltd. Under U.S. GAAP the entity, OCY Aurora Ltd, is considered to be a VIE. As of December 31, 2023, and June 30, 2024, the Company has consolidated 100% of OCY Aurora Ltd., the lessor variable interest entity (‘‘lessor VIE’’). We have leased Navigator Aurora from OCY Aurora Ltd. under a sale and leaseback arrangement. The lessor VIE is a special purpose vehicle (“SPV”) wholly owned by OCY Aurora Ltd. a financial institution. The Company has concluded that it has a variable interest in the SPV because the bareboat charter has fixed price call options to acquire the Navigator Aurora from the SPV at various dates throughout the 13 year lease/bareboat charter term, commencing from the fifth year, initially at USD 44.8 million. The call options are considered to be variable interests as each option effectively transfers substantially all of the rewards from N avigator Aurora to us and limits the SPV’s ability to benefit from the rewards of ownership. The Company has performed an analysis and concluded that we exercise power through the exercise of the call options in the lease agreement. The call options, although not an activity of the SPV, if exercised would significantly impact the SPV’s economic performance as the SPV owns no other revenue generating assets. The options transfer to the Company the right to receive benefits as they are agreed at a predetermined price. The SPV is protected from decreases in the value of the vessel, as if the vessel’s market value were to decline, the call option provides the SPV protection up to the point where it would not be economically viable for the Company to exercise the option. In addition, the Company has the power to direct decisions over the activities and care of the vessel which directly impact its value such as for the day-to-day commercial, technical management and operation of the vessel. Following the above, the SPV is categorized under U.S. GAAP as a VIE and the Company has concluded it is the primary beneficiary and must therefore consolidate the SPV within its financial statements. We own a 25% and 40% share in equity of Navigator Crewing Services Philippines Inc. (“NCSPI”, “Navigator Crewing”) and Navigator Gas Services Philippines Inc. (“NSSPI”), respectively. These companies were established primarily to provide marine services as principals or agents to ship owners, ship operators, managers engaged in international maritime business and business support services, respectively. The Company has determined that it has a variable interest in NCSPI and NSSPI and is considered to be the primary beneficiary as a result of having a controlling financial interest in the entities and has the power to direct the activities that most significantly impact NCSPI’s and NSSPI’s economic performance. As of June 30, 2024, the Company's VIE’s had total assets and liabilities of $171.0 million and $58.7 million respectively which have been included in the Company’s consolidated balance sheet as of that date (December 31, 2023: $179.8 million and $61.4 million, respectively).

Related Party Transactions

Related Party Transactions	6 Months Ended
	Jun. 30, 2024
Related Party Transactions [Abstract]
Related Party Transactions	Related Party Transactions The following table summarizes our transactions with related parties for the three and six months ended June 30, 2024 and 2023: Three months ended Three months ended Six months ended Six months ended (in thousands) Net income / (expenses) Luna Pool Agency Limited (17) (28) (17) (36) Ocean Yield Malta Limited (774) (732) (1,589) (1,495) Ultranav Business Support ApS (32) (16) (108) (31) $ (823) $ (776) $ (1,714) $ (1,562) The following table sets out the balances due from related parties as of December 31, 2023 and June 30, 2024: December 31, 2023 June 30, 2024 (in thousands) Luna Pool Agency Limited $ 30,804 $ 20,546 Unigas Pool 2,598 4,732 $ 33,402 $ 25,278 The following table sets out the balances due to related parties as of December 31, 2023 and June 30, 2024: December 31, 2023 June 30, 2024 (in thousands) Ocean Yield Malta Limited $ 41,912 $ 38,593 Naviera Ultranav Dos Limitada 36 — $ 41,948 $ 38,593 As of June 30, 2024, Ultranav International ApS held a 30.5% share in the Company and BW Group held a 21.4% share in the Company and they are our principal shareholders. They may exert considerable influence on the directors and other significant corporate actions.

Subsequent Events

Subsequent Events	6 Months Ended
	Jun. 30, 2024
Subsequent Events [Abstract]
Subsequent Events	Subsequent Events On August 9, 2024, the Company entered into the August 2024 Facility with Crédit Agricole Corporate and Investment Bank, ING Bank N.V., and Skandinaviska Enskilda Banken AB (Publ), to refinance its March 2019 secured term loan that was due to mature in March 2025, to fund the repurchase of the Navigator Aurora pursuant to the Company’s existing October 2019 sale and leaseback arrangement related to that vessel which, based on a termination notice we issued to the lessor in May 2024, will terminate in October 2024, and for general corporate and working capital purposes. The August 2024 Facility has a term of six years maturing in August 2030, is for a maximum principal amount of $147.6 million, decreases quarterly followed by a final balloon payment in August 2030 of $63.9 million, and bears interest at a rate of Term SOFR plus 190 basis points, which margin includes a 5-basis point sustainability-linked element. On August 14, 2024, the Company's Board of Directors declared a cash dividend of $0.05 per share of the Company’s common stock for the three months ended June 30, 2024, payable on September 24, 2024 to all shareholders of record as of the close of business New York time on September 3, 2024. The aggregate amount of the dividend is expected to be approximately $3.6 million, which the Company anticipates will be funded from cash on hand. Also as part of the Company's Return of Capital policy for the three months ended June 30, 2024, the Company expects to repurchase approximately $2.3 million of common stock between August 15, 2024, and September 30, 2024, subject to operating needs, market conditions, and other circumstances, such that the Dividend and Share Repurchases together equal 25% of net income for the three months ended June 30, 2024

General Information and Basis_2

General Information and Basis of Presentation (Policies)	6 Months Ended
	Jun. 30, 2024
Accounting Policies [Abstract]
Basis of Presentation	Basis of Presentation These unaudited interim condensed consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America (“U.S. GAAP”) for interim financial information and related Securities and Exchange Commission (“SEC”) rules for interim financial reporting. Accordingly, they do not include all of the information and footnotes required by U.S. GAAP for complete financial statements. In our opinion, all adjustments consisting of normal recurring items, necessary for a fair statement of financial position, operating results and cash flows have been included in the unaudited interim condensed consolidated financial statements and related notes. The unaudited interim condensed consolidated financial statements and related notes should be read in conjunction with the audited consolidated financial statements and related notes for the year ended December 31, 2023 included in our Annual Report on Form 20-F filed with the SEC on March 27, 2024 (the “2023 Annual Report”). The year-end condensed balance sheet data was derived from the audited financial statements but does not include all disclosures required by accounting principles generally accepted in the United States of America. The results for the six months ended June 30, 2024, are not necessarily indicative of results for the year ending December 31, 2024, or any other future periods. The accompanying unaudited condensed consolidated financial statements include the accounts of the Company, its subsidiaries and variable interest entities (“VIE”) for which the Company is a primary beneficiary and are also consolidated (please read Note 14—Variable Interest Entities for additional information). All intercompany accounts and transactions have been eliminated on consolidation. The results of operations are subject to seasonal and other fluctuations and are therefore not necessarily indicative of results that may otherwise be expected for the entire year. Management has evaluated the Company’s ability to continue as a going concern and considered the conditions and events that could raise substantial doubt about the Company’s ability to continue as a going concern within 12 months after these financial statements are issued. As part of the assessment, management has considered the following: • our current financial condition and liquidity sources, including current funds available and forecasted future cash flows; • the severity and duration of any world events and armed conflicts, including the Russian-Ukraine war, conflicts in the Israel-Gaza region and the potential for broader conflict in the Middle East involving Iran and other nations, and associated repercussions to supply and demand for oil and gas and the economy generally as well as possible effects of trade disruptions; • environmental regulations such as those affecting vessels' Energy Efficiency Existing Ship Index (“EEXI”); and • the total capital contributions required for the Terminal Expansion Project (as defined below). Management has determined that it is appropriate to continue to adopt the going concern basis in preparing the financial statements.
Recent Accounting Pronouncements	Recent Accounting Pronouncements New accounting standards issued as of June 30, 2024 may affect future reporting by Navigator Holdings Ltd .

Operating Revenues (Tables)

Operating Revenues (Tables)	6 Months Ended
	Jun. 30, 2024
Revenue from Contract with Customer [Abstract]
Schedule of Disaggregation of Revenue	The following table discloses operating revenues by contract type for the three and six months ended June 30, 2024 and 2023: Three months ended June 30, 2023 Three months ended June 30, 2024 Six months ended June 30, 2023 Six months ended June 30, 2024 (in thousands) Time charters $ 78,319 $ 86,278 $ 154,711 $ 175,367 Voyage charters 43,801 45,323 84,019 77,254 Voyage charters from Luna Pool collaborative arrangement 155 — 7,355 — Operating revenues from Unigas Pool 13,060 15,075 25,252 28,210 Total operating revenues $ 135,335 $ 146,676 $ 271,337 $ 280,831
Schedules of Cash Flows for Committed Time Charter Revenues	The estimated undiscounted cash flows for committed time charter revenues that are expected to be received on an annual basis for ongoing time charters, as of June 30, 2024, are as follows: (in thousands of U.S. dollars) Within 1 year 196,750 In the second year 64,995 In the third year 17,113 In the fourth year 1,177

Vessels (Tables)

Vessels (Tables)	6 Months Ended
	Jun. 30, 2024
Property, Plant and Equipment [Abstract]
Schedule of Vessels	Vessels Drydocking Total (in thousands) Cost January 1, 2024 $ 2,467,396 $ 69,938 $ 2,537,334 Additions — 10,398 10,398 Write-offs of fully amortized assets — (5,319) (5,319) June 30, 2024 2,467,396 75,017 2,542,413 Accumulated Depreciation January 1, 2024 743,334 39,618 782,952 Charge for the period 55,504 11,189 66,693 Write-offs of fully amortized assets — (5,319) (5,319) June 30, 2024 798,838 45,488 844,326 Net Book Value December 31, 2023 1,724,062 30,320 1,754,382 June 30, 2024 $ 1,668,558 $ 29,529 $ 1,698,087

Equity Method Investments (Tabl

Equity Method Investments (Tables)	6 Months Ended
	Jun. 30, 2024
Equity Method Investments and Joint Ventures [Abstract]
Schedule of Participation in Investments that are Accounted for Using the Equity Method	As of December 31, 2023, and June 30, 2024, we had the following participation in investments that are accounted for using the equity method: December 31, 2023 June 30, 2024 Enterprise Navigator Ethylene Terminal L.L.C. (“Export Terminal Joint Venture”) 50 % 50 % Unigas International B.V. (“Unigas”) 33.3 % 33.3 % Dan Unity CO2 A/S 50 % 50 % Luna Pool Agency Limited (“Pool Agency”) 50 % 50 % Azane Fuel Solutions AS ("Azane") 14.5 % 14.5 % Bluestreak CO2 Limited ("Bluestreak") 50 % 50 %
Schedule of Movement in Equity Method Investments	The table below shows the movement in the Company’s equity method investments, for the year ended December 31, 2023, and six months ended June 30, 2024: Year ended December 31, 2023 Six months ended June 30, 2024 (in thousands) Equity method investments at January 1, 2023 and 2024 $ 148,534 $ 174,910 Share of results 20,607 9,077 Distributions received from equity method investments (30,790) (14,650) Equity contributions to joint venture entity 35,000 24,003 Equity method investments – additions 1,559 — Total equity method investments at December 31, 2023 and June 30, 2024 $ 174,910 $ 193,340

Secured Term Loan Facilities _2

Secured Term Loan Facilities and Revolving Credit Facilities (Tables)	6 Months Ended
	Jun. 30, 2024
Debt Disclosure [Abstract]
Schedule of Secured Term Loan Facilities	The following table shows the breakdown of all secured term loan facilities, revolving credit facilities and total deferred financing costs split between current and non-current liabilities at December 31, 2023 and June 30, 2024: December 31, 2023 June 30, 2024 (in thousands) Current Liability Current portion of secured term loan facilities and revolving credit facilities $ 123,024 $ 120,815 Less: current portion of deferred financing costs (2,697) (2,365) Current portion of secured term loan facilities and revolving credit facilities, net of deferred financing costs $ 120,327 $ 118,450 Non-Current Liability Secured term loan facilities and revolving credit facilities net of current portion, excluding amount due to related parties $ 646,131 $ 582,139 Amount due to related parties* 41,342 38,088 Less: non-current portion of deferred financing costs (4,156) (3,026) Non-current secured term loan facilities and revolving credit facilities, net of current portion and non-current deferred financing costs $ 683,317 $ 617,201 *Amount due to related parties relates to the Navigator Aurora Facility held within a lessor entity (for which legal ownership resides with a financial institution) that we are required to consolidate as a variable interest entity under U.S. GAAP into our financial statements. The following table shows the breakdown of our senior unsecured bonds and total deferred financing costs as of December 31, 2023 and June 30, 2024: December 31, 2023 June 30, 2024 (in thousands) Total bonds cost $ 100,000 $ 100,000 Less Treasury bonds* (9,000) (9,000) Less deferred financing costs (664) (467) Total bonds, net of deferred financing costs $ 90,336 $ 90,533

Senior Unsecured Bonds (Tables)

Senior Unsecured Bonds (Tables)	6 Months Ended
	Jun. 30, 2024
Debt Disclosure [Abstract]
Schedule of Senior Unsecured Bond	The following table shows the breakdown of all secured term loan facilities, revolving credit facilities and total deferred financing costs split between current and non-current liabilities at December 31, 2023 and June 30, 2024: December 31, 2023 June 30, 2024 (in thousands) Current Liability Current portion of secured term loan facilities and revolving credit facilities $ 123,024 $ 120,815 Less: current portion of deferred financing costs (2,697) (2,365) Current portion of secured term loan facilities and revolving credit facilities, net of deferred financing costs $ 120,327 $ 118,450 Non-Current Liability Secured term loan facilities and revolving credit facilities net of current portion, excluding amount due to related parties $ 646,131 $ 582,139 Amount due to related parties* 41,342 38,088 Less: non-current portion of deferred financing costs (4,156) (3,026) Non-current secured term loan facilities and revolving credit facilities, net of current portion and non-current deferred financing costs $ 683,317 $ 617,201 *Amount due to related parties relates to the Navigator Aurora Facility held within a lessor entity (for which legal ownership resides with a financial institution) that we are required to consolidate as a variable interest entity under U.S. GAAP into our financial statements. The following table shows the breakdown of our senior unsecured bonds and total deferred financing costs as of December 31, 2023 and June 30, 2024: December 31, 2023 June 30, 2024 (in thousands) Total bonds cost $ 100,000 $ 100,000 Less Treasury bonds* (9,000) (9,000) Less deferred financing costs (664) (467) Total bonds, net of deferred financing costs $ 90,336 $ 90,533

Derivative Instruments Accoun_2

Derivative Instruments Accounted for at Fair Value (Tables)	6 Months Ended
	Jun. 30, 2024
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule of Assets and Liabilities Measured at Fair Value on Recurring Basis	The following table includes the estimated fair value of those assets and liabilities that are measured at fair value on a recurring basis as of December 31, 2023 and June 30, 2024. December 31, 2023 June 30, 2024 (in thousands) Fair Value Hierarchy Level Fair Value Asset Fair Value Asset Interest rate swap agreements Level 2 $14,674 $12,647

Fair Value of Financial Instr_2

Fair Value of Financial Instruments Not Accounted For at Fair Value (Tables)	6 Months Ended
	Jun. 30, 2024
Fair Value Disclosures [Abstract]
Schedule of Assets and Liabilities Not Accounted for at Fair Value	The following table includes the estimated fair value and carrying value of those assets and liabilities where the fair value approximate carrying value. The table excludes cash, cash equivalents, restricted cash, accounts receivable, accounts payable, accrued expenses and other liabilities because the fair value approximates carrying value and, for accounts receivable and payable, are due in one year or less. December 31, 2023 June 30, 2024 (in thousands) Fair Value Hierarchy Level Carrying Amount (Liability) Fair Value (Liability) Fair Value Hierarchy Level Carrying Fair Value (Liability) 2020 Bonds (Note 6) Level 2 $ (91,000) $ (91,455) Level 2 $ (91,000) $ (91,114) Secured term loan facilities and revolving credit facilities (Note 5) Level 2 $ (810,497) $ (810,497) Level 2 $ (741,042) $ (741,042)

Earnings per share (Tables)

Earnings per share (Tables)	6 Months Ended
	Jun. 30, 2024
Earnings Per Share [Abstract]
Schedule of Weighted Average Shares Outstanding	The following table shows the calculation of both the basic and diluted number of weighted average outstanding shares for the three and six months ended June 30, 2024 and 2023: Three months ended Three months ended Six months ended June 30, 2023 Six months ended June 30, 2024 Net Income attributable to stockholders of Navigator Holdings Ltd.(in thousands) $ 26,606 $ 23,240 $ 45,392 $ 45,813 Basic weighted average number of shares: 73,745,894 72,458,773 74,847,093 72,834,272 Effect of dilutive potential share options: 583,268 424,360 474,533 485,877 Diluted weighted average number of shares 74,329,162 72,883,133 75,321,626 73,320,149 Earnings per share attributable to stockholders of Navigator Holdings Ltd.: Basic earnings per share $ 0.36 $ 0.32 $ 0.61 $ 0.63 Diluted earnings per share $ 0.36 $ 0.32 $ 0.60 $ 0.62

Share-Based Compensation (Table

Share-Based Compensation (Tables)	6 Months Ended
	Jun. 30, 2024
Share-Based Payment Arrangement [Abstract]
Schedule of Restricted Share Grant Activity	Restricted share grant activity for the year ended December 31, 2023, and the six months ended June 30, 2024, was as follows: Number of non-vested restricted shares Weighted average grant date fair value Weighted average remaining contractual term (years) Balance as of January 1, 2023 115,693 $ 10.16 1.04 Granted 47,829 12.45 Vested (78,144) 10.16 Balance as of December 31, 2023 85,378 11.44 0.81 Granted 54,851 15.03 Vested (41,944) 11.92 Balance as of June 30, 2024 98,285 $ 13.24 1.12
Schedule of Stock Option Activity	The movements in the outstanding share options during the year ended December 31, 2023, and the six months ended June 30, 2024, were as follows: Number of options outstanding Weighted average exercise price per share Aggregate intrinsic value 5 Balance as of January 1, 2023 $ 320,856 $ 20.99 $ — Forfeited during the year (35,875) 22.35 — Issuance during the year 262,412 15.45 — Balance as of December 31, 2023 547,393 18.25 53,100 Expired during the period (143,538) 24.29 — Balance as of June 30, 2024 $ 403,855 $ 16.10 $ 609,648

Commitments and Contingencies (

Commitments and Contingencies (Tables)	6 Months Ended
	Jun. 30, 2024
Commitments and Contingencies Disclosure [Abstract]
Schedule of Contractual Obligations	The schedule below summarizes our contractual obligations as of June 30, 2024. 2024 2025 2026 2027 2028 Thereafter Total (in thousands) Secured term loan facilities and revolving credit facilities $ 61,567 $ 292,616 $ 107,216 $ 67,539 $ 89,186 $ 84,830 $ 702,954 Ethylene Export Terminal capital contributions 1 70,931 — — — — — 70,931 2020 Bonds — 100,000 — — — — 100,000 Office operating leases 2 680 1,266 1,058 1,267 — — 4,271 Navigator Aurora Facility 3 — — — 38,088 — — 38,088 Total contractual obligations $ 133,178 $ 393,882 $ 108,274 $ 106,894 $ 89,186 $ 84,830 $ 916,244 1 We have committed to invest further in terminal infrastructure, such as expanding our existing Ethylene Export Terminal. As at June 30, 2024 the remaining capital contributions required from us to the Export Terminal Joint Venture for the Terminal Expansion Project are expected to be approximately $71 million. 2 The Company occupies office space in London with a lease that commenced in January 2022 for a period of 10 years with a mutual break option in January 2027, which is the fifth anniversary of the lease commencement date. The annual gross rent under this lease is approximately $1.1 million, with an initial rent-free period of 27 months, of which 13 months of the rent free period is repayable in the event that the break option is exercised. The Company entered into a lease for office space in Houston that expires on March 31, 2025. The annual gross rent under this lease is approximately $60,000. The lease term for our representative office in Gdynia, Poland was revised during 2021 for an amended period to May 31, 2025. The gross rent per year is approximately $64,000. The Company occupies office space in Copenhagen, Denmark with a lease that commenced in September 2021 that expires in June 2025. The gross rent per year is approximately $180,000. The weighted average remaining contractual lease term for the above four office leases on June 30, 2024, was 2.47 years (December 31, 2023: 3.88 years). 3

Operating Lease Liabilities (Ta

Operating Lease Liabilities (Tables)	6 Months Ended
	Jun. 30, 2024
Leases [Abstract]
Schedule of Maturity Analysis of The Undiscounted Cash Flows of Operating Lease Liabilities	A maturity analysis of the annual undiscounted cash flows of the Company’s operating lease liabilities as of December 31, 2023 and June 30, 2024, is presented in the following table: December 31, 2023 June 30, 2024 (in thousands) One year $ 1,027 $ 1,327 Two years 1,279 1,143 Three years 1,066 1,801 Four years 1,274 — Total undiscounted operating lease commitments 4,646 4,271 Less: Discount adjustment (232) (170) Total operating lease liabilities 4,414 4,101 Less: current portion (914) (1,234) Operating lease liabilities, non-current portion $ 3,500 $ 2,867

Cash, Cash Equivalents and Re_2

Cash, Cash Equivalents and Restricted Cash (Tables)	6 Months Ended
	Jun. 30, 2024
Cash and Cash Equivalents [Abstract]
Schedule of Cash, Cash Equivalents and Restricted Cash	The following table shows the breakdown of cash, cash equivalents and restricted cash as of December 31, 2023 and June 30, 2024: December 31, 2023 June 30, 2024 (in thousands) Cash and cash equivalents $ 149,581 $ 128,703 Cash and cash equivalents held by VIE 23 411 Restricted cash 8,638 9,342 Total cash, cash equivalents and restricted cash $ 158,242 $ 138,456

Related Party Transactions (Tab

Related Party Transactions (Tables)	6 Months Ended
	Jun. 30, 2024
Related Party Transactions [Abstract]
Schedule of Income (Expenses) With Related Parties	The following table summarizes our transactions with related parties for the three and six months ended June 30, 2024 and 2023: Three months ended Three months ended Six months ended Six months ended (in thousands) Net income / (expenses) Luna Pool Agency Limited (17) (28) (17) (36) Ocean Yield Malta Limited (774) (732) (1,589) (1,495) Ultranav Business Support ApS (32) (16) (108) (31) $ (823) $ (776) $ (1,714) $ (1,562)
Schedule of Due From Related Parties	The following table sets out the balances due from related parties as of December 31, 2023 and June 30, 2024: December 31, 2023 June 30, 2024 (in thousands) Luna Pool Agency Limited $ 30,804 $ 20,546 Unigas Pool 2,598 4,732 $ 33,402 $ 25,278
Schedule of Due To Related Parties	The following table sets out the balances due to related parties as of December 31, 2023 and June 30, 2024: December 31, 2023 June 30, 2024 (in thousands) Ocean Yield Malta Limited $ 41,912 $ 38,593 Naviera Ultranav Dos Limitada 36 — $ 41,948 $ 38,593

General Information and Basis_3

General Information and Basis of Presentation (Details) $ in Millions	1 Months Ended	6 Months Ended
	Sep. 30, 2022 vessel m³	Jun. 30, 2024 USD ($) vessel MT m³	Dec. 31, 2023	Apr. 13, 2023 vessel
Schedule Of Description Of Business [Line Items]
Number of vessels | vessel		56		5
Secured Term
Schedule Of Description Of Business [Line Items]
Aggregate principal amount | $		$ 210
Balloon payment to be paid | $		136
2020 Bonds
Schedule Of Description Of Business [Line Items]
Amount due at maturity | $		$ 91
Enterprise Navigator Ethylene Terminal L.L.C. (“Export Terminal Joint Venture”)
Schedule Of Description Of Business [Line Items]
Economic interest in building and operating marine export terminal (as a percent)		50%	50%
Exporting capacity per year (in excess) | MT		1
Ethylene
Schedule Of Description Of Business [Line Items]
Number of vessels | vessel		25
2018-built ethylene
Schedule Of Description Of Business [Line Items]
Number of vessels | vessel	2
Vessels cargo capacity (in cbm) | m³	17,000
2019-built ethylene
Schedule Of Description Of Business [Line Items]
Number of vessels | vessel	3
Vessels cargo capacity (in cbm) | m³	22,000
Minimum
Schedule Of Description Of Business [Line Items]
Vessels cargo capacity (in cbm) | m³		3,770
Maximum
Schedule Of Description Of Business [Line Items]
Vessels cargo capacity (in cbm) | m³		38,000

Operating Revenues - Disaggrega

Operating Revenues - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Disaggregation of Revenue [Line Items]
Operating revenues - charters	$ 131,601	$ 122,120	$ 252,621	$ 238,730
Voyage charters from Luna Pool collaborative arrangement	0	155	0	7,355
Operating revenues from Unigas Pool	15,075	13,060	28,210	25,252
Total operating revenue	146,676	135,335	280,831	271,337
Time Charters
Disaggregation of Revenue [Line Items]
Operating revenues - charters	86,278	78,319	175,367	154,711
Voyage Charters
Disaggregation of Revenue [Line Items]
Operating revenues - charters	45,323	43,801	77,254	84,019
Voyage charters from Luna Pool collaborative arrangement	$ 0	$ 155	$ 0	$ 7,355

Operating Revenues - Additional

Operating Revenues - Additional Information (Details) $ in Thousands	Jun. 30, 2024 USD ($) vessel	Dec. 31, 2023 USD ($) vessel	Apr. 13, 2023 vessel	Dec. 31, 2022 USD ($)
Disaggregation of Revenue [Line Items]
Number of operated vessels | vessel	56		5
Number of operated vessels, excluding Unigas Pool | vessel	47	47
Number of vessels within Unigas Pool | vessel	9
Deferred income | $	$ 25,596	$ 25,617
Accounts receivable | $	$ 19,200	$ 34,653
Time Charters
Disaggregation of Revenue [Line Items]
Number of operated vessels | vessel	32	38
Accrued income | $	$ 900	$ 1,000
Deferred income | $	$ 25,600	$ 25,600
Time Charters, Expiring Within One Year
Disaggregation of Revenue [Line Items]
Number of operated vessels | vessel	26	27
Time Charters, Expiring Within Three Years
Disaggregation of Revenue [Line Items]
Number of operated vessels | vessel	5	5
Time Charters, Expiring From Three To Five Years
Disaggregation of Revenue [Line Items]
Number of operated vessels | vessel	1	6
Voyage Charters
Disaggregation of Revenue [Line Items]
Accrued income | $	$ 6,800	$ 1,300
Accounts receivable | $	6,900	18,300		$ 5,100
Costs incurred to fulfill a contract | $	$ 1,100	$ 1,000

Operating Revenues - Cash Flows

Operating Revenues - Cash Flows for Committed Time Charter Revenues (Details) - Time Charters $ in Thousands	Jun. 30, 2024 USD ($)
Concentration Risk [Line Items]
Within 1 year	$ 196,750
In the second year	64,995
In the third year	17,113
In the fourth year	$ 1,177

Vessels - Rollforward (Details)

Vessels - Rollforward (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2024	Dec. 31, 2023
Net Book Value
Vessels, net	$ 1,698,087	$ 1,754,382
Total
Cost
Beginning balance	2,537,334
Additions	10,398
Write-offs of fully amortized assets	(5,319)
Ending balance	2,542,413
Accumulated Depreciation
Beginning balance	782,952
Charge for the period	66,693
Write-offs of fully amortized assets	(5,319)
Ending balance	844,326
Net Book Value
Vessels, net	1,698,087	1,754,382
Vessels
Cost
Beginning balance	2,467,396
Additions	0
Write-offs of fully amortized assets	0
Ending balance	2,467,396
Accumulated Depreciation
Beginning balance	743,334
Charge for the period	55,504
Write-offs of fully amortized assets	0
Ending balance	798,838
Net Book Value
Vessels, net	1,668,558	1,724,062
Drydocking
Cost
Beginning balance	69,938
Additions	10,398
Write-offs of fully amortized assets	(5,319)
Ending balance	75,017
Accumulated Depreciation
Beginning balance	39,618
Charge for the period	11,189
Write-offs of fully amortized assets	(5,319)
Ending balance	45,488
Net Book Value
Vessels, net	$ 29,529	$ 30,320

Vessels - Additional Informatio

Vessels - Additional Information (Details) $ in Thousands	Jun. 30, 2024 USD ($) vessel	Dec. 31, 2023 USD ($) vessel
Property, Plant and Equipment [Line Items]
Net book value of vessels	$ 1,698,087	$ 1,754,382
Variable Interest Entity, Primary Beneficiary
Property, Plant and Equipment [Line Items]
Cost of vessels	83,600	83,600
Net book value of vessels	60,800	66,100
Collateralized Loan Obligations
Property, Plant and Equipment [Line Items]
Net book value of vessels	$ 1,363,600	$ 1,420,900
Time Charter Agreements
Property, Plant and Equipment [Line Items]
Number of vessels contracted | vessel	32	34
Cost of vessels	$ 1,670,700	$ 1,776,000
Net book value of vessels	$ 1,090,900	$ 1,236,000

Equity Method Investments - Add

Equity Method Investments - Additional Information (Details) $ in Thousands	6 Months Ended		60 Months Ended
	Jun. 30, 2024 USD ($) bunkeringUnit	Jun. 30, 2023 USD ($)	Dec. 31, 2022 USD ($)	Jun. 30, 2024 GBP (£) bunkeringUnit	Dec. 31, 2023 USD ($)	Oct. 25, 2023
Schedule of Equity Method Investments [Line Items]
Share of results from equity method investment excluding amortized costs	$ 9,200	$ 11,300
Equity method investments	$ 193,340		$ 148,534		$ 174,910
Azane Fuel Solutions AS ("Azane") | Yara Clean Ammonia
Schedule of Equity Method Investments [Line Items]
Number of bunkering units pre-ordered | bunkeringUnit	15			15
Enterprise Navigator Ethylene Terminal L.L.C. (“Export Terminal Joint Venture”)
Schedule of Equity Method Investments [Line Items]
Equity contributions to joint venture			$ 214,500
Difference in the carrying amount and the underlying equity	$ 5,400				$ 5,600
Costs amortized	$ 200	$ 200
Economic interest in building and operating marine export terminal (as a percent)	50%			50%	50%
Unigas International B.V. (“Unigas”)
Schedule of Equity Method Investments [Line Items]
Economic interest in building and operating marine export terminal (as a percent)	33.30%			33.30%	33.30%
Luna Pool Agency Limited
Schedule of Equity Method Investments [Line Items]
Economic interest in building and operating marine export terminal (as a percent)	50%			50%	50%
Equity method investments | £				£ 1
Azane Fuel Solutions AS ("Azane")
Schedule of Equity Method Investments [Line Items]
Economic interest in building and operating marine export terminal (as a percent)	14.50%			14.50%	14.50%	14.50%
Bluestreak CO2 Limited ("Bluestreak")
Schedule of Equity Method Investments [Line Items]
Economic interest in building and operating marine export terminal (as a percent)	50%			50%	50%

Equity Method Investments - Par

Equity Method Investments - Participation in Investments That Are Accounted For Using The Equity Method (Details)	Jun. 30, 2024	Dec. 31, 2023	Oct. 25, 2023
Enterprise Navigator Ethylene Terminal L.L.C. (“Export Terminal Joint Venture”)
Schedule of Equity Method Investments [Line Items]
Participation in investments accounted for using the equity method (as a percent)	50%	50%
Unigas International B.V. (“Unigas”)
Schedule of Equity Method Investments [Line Items]
Participation in investments accounted for using the equity method (as a percent)	33.30%	33.30%
Dan Unity CO2 A/S
Schedule of Equity Method Investments [Line Items]
Participation in investments accounted for using the equity method (as a percent)	50%	50%
Luna Pool Agency Limited (“Pool Agency”)
Schedule of Equity Method Investments [Line Items]
Participation in investments accounted for using the equity method (as a percent)	50%	50%
Azane Fuel Solutions AS ("Azane")
Schedule of Equity Method Investments [Line Items]
Participation in investments accounted for using the equity method (as a percent)	14.50%	14.50%	14.50%
Bluestreak CO2 Limited ("Bluestreak")
Schedule of Equity Method Investments [Line Items]
Participation in investments accounted for using the equity method (as a percent)	50%	50%

Equity Method Investments - Mov

Equity Method Investments - Movement in Equity Method Investments (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
Equity Method Investments [Roll Forward]
Equity method investments at January 1, 2023 and 2024			$ 174,910	$ 148,534	$ 148,534
Share of results	$ 4,687	$ 5,993	9,077	$ 11,296	20,607
Distributions received from equity method investments			(14,650)		(30,790)
Equity contributions to joint venture entity			24,003		35,000
Equity method investments – additions			0		1,559
Total equity method investments at December 31, 2023 and June 30, 2024	$ 193,340		$ 193,340		$ 174,910

Secured Term Loan Facilities _3

Secured Term Loan Facilities and Revolving Credit Facilities - Summary of Secured Term Loan Facilities and Deferred Financing Costs Split Between Current and Non-Current Liabilities (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Current Liability
Current portion of secured term loan facilities and revolving credit facilities	$ 120,815	$ 123,024
Less: current portion of deferred financing costs	(2,365)	(2,697)
Current portion of secured term loan facilities and revolving credit facilities, net of deferred financing costs	118,450	120,327
Non-Current Liability
Less: non-current portion of deferred financing costs	(3,026)	(4,156)
Non-current secured term loan facilities and revolving credit facilities, net of current portion and non-current deferred financing costs	617,201	683,317
Nonrelated Party
Non-Current Liability
Secured term loan facilities and revolving credit facilities net of current portion	582,139	646,131
Related Party
Non-Current Liability
Secured term loan facilities and revolving credit facilities net of current portion	$ 38,088	$ 41,342

Senior Unsecured Bonds - Additi

Senior Unsecured Bonds - Additional Information (Details) - 2020 Senior Unsecured Bonds - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023	Sep. 30, 2023	Sep. 30, 2020
Debt Instrument [Line Items]
Aggregate principal amount				$ 100,000
Interest rate on bond				8%
Bonds repurchased	$ 9,000	$ 9,000	$ 9,000

Senior Unsecured Bonds - Summar

Senior Unsecured Bonds - Summary of Senior Unsecured Bond and Total Deferred Financing Costs (Details) - 2020 Senior Unsecured Bonds - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023	Sep. 30, 2023
Debt Instrument [Line Items]
Total bonds cost	$ 100,000	$ 100,000
Less Treasury bonds*	(9,000)	(9,000)	$ (9,000)
Less deferred financing costs	(467)	(664)
Total	$ 90,533	$ 90,336

Derivative Instruments Accoun_3

Derivative Instruments Accounted for at Fair Value - Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Interest Rate Swap | Level 2
Derivatives, Fair Value [Line Items]
Interest rate swap agreements	$ 12,647	$ 14,674

Derivative Instruments Accoun_4

Derivative Instruments Accounted for at Fair Value - Additional Information (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
Derivative Instruments, Gain (Loss) [Line Items]
Unrealized gain/(loss) on non-designated derivative instruments	$ (1,581)	$ 3,195	$ (2,028)	$ (1,056)
Interest Rate Swap | Minimum
Derivative Instruments, Gain (Loss) [Line Items]
Derivative interest rate	0.3615%		0.3615%
Interest Rate Swap | Maximum
Derivative Instruments, Gain (Loss) [Line Items]
Derivative interest rate	2.137%		2.137%
Interest Rate Swap | Level 2
Derivative Instruments, Gain (Loss) [Line Items]
Fair value of derivative asset	$ 12,647		$ 12,647		$ 14,674

Fair Value of Financial Instr_3

Fair Value of Financial Instruments Not Accounted For at Fair Value (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
2020 Bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Carrying Amount Asset (Liability) - Secured term loan facilities and revolving credit facilities	$ (100,000)
Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Carrying Amount Asset (Liability) - Secured term loan facilities and revolving credit facilities	(741,042)	$ (810,497)
Fair Value Asset (Liability) - Secured term loan facilities and revolving credit facility	(741,042)	(810,497)
Level 2 | 2020 Bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Carrying Amount Asset (Liability) - Bonds	(91,000)	(91,000)
Fair Value Asset (Liability) - Bonds	$ (91,114)	$ (91,455)

Earnings per share (Details)

Earnings per share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Earnings Per Share [Abstract]
Net Income attributable to stockholders of Navigator Holdings Ltd.	$ 23,240	$ 26,606	$ 45,813	$ 45,392
Basic weighted average number of shares (in shares)	72,458,773	73,745,894	72,834,272	74,847,093
Effect of dilutive potential share options (in shares)	424,360	583,268	485,877	474,533
Diluted weighted average number of shares (in shares)	72,883,133	74,329,162	73,320,149	75,321,626
Earnings per share attributable to stockholders of Navigator Holdings Ltd.:
Basic earnings per share (in dollars per share)	$ 0.32	$ 0.36	$ 0.63	$ 0.61
Diluted earnings per share (in dollars per share)	$ 0.32	$ 0.36	$ 0.62	$ 0.60

Share-Based Compensation - Addi

Share-Based Compensation - Additional Information (Details) - USD ($)							6 Months Ended		12 Months Ended
	Apr. 15, 2024	Mar. 17, 2024	Jun. 30, 2023	Mar. 19, 2023	Mar. 17, 2023	Mar. 15, 2023	Jun. 30, 2024	Jun. 30, 2023	Dec. 31, 2023
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation costs							$ 281,557	$ 457,751
Options, outstanding, weighted-average remaining contractual term							3 years 5 months 26 days		2 years 11 months 26 days
Options, exercisable, weighted average remaining contractual term							3 years 5 months 26 days		2 years 11 months 26 days
Number of options vested but not exercised (in shares)							131,443		274,981
Share options, exercisable, weighted average exercise price (in dollars per share)							$ 18.21		$ 21.38
Restricted Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awards granted (in shares)							54,851		47,829
Weighted average value of awards granted (in dollars per share)							$ 15.03		$ 12.45
Awards vested (in shares)							41,944		78,144
Weighted average grant date value of awards vested (in dollars per share)							$ 11.92		$ 10.16
Non-option compensation cost not yet recognized							$ 717,882		$ 400,282
Total compensation cost not yet recognized period for recognition							1 year 1 month 13 days		9 months 21 days
Employee Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation costs							$ 34,186	30,085
Discount percentage to share price							15%
Vesting period							3 years
Shares issued (in shares)							1,185
2023 Plan | Restricted Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awards granted (in shares)	54,851
Weighted average value of awards granted (in dollars per share)	$ 15.03
2023 Plan | Restricted Shares | Non Employee Director
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awards granted (in shares)	41,291
2023 Plan | Restricted Shares | Officers and Employees
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awards granted (in shares)	13,560
2013 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation costs							$ 69,405	$ 121,078
Option compensation not yet recognized							$ 1,693,100		$ 1,142,618
2013 Plan | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected term							4 years
2013 Plan | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected term							6 years 6 months
2013 Plan | Non Employee Director
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awards vested (in shares)		31,833			45,864
Weighted average grant date value of awards vested (in dollars per share)		$ 12.45			$ 10.65
Fair value of shares vested		$ 487,045			$ 553,120
2013 Plan | Officers and Employees
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awards vested (in shares)		10,111		12,159
Weighted average grant date value of awards vested (in dollars per share)		$ 10.26		$ 7.90
Fair value of shares vested		$ 154,698		$ 157,581
2013 Plan | Officer
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awards vested (in shares)			15,627
Weighted average grant date value of awards vested (in dollars per share)			$ 9.84
Fair value of shares vested			$ 203,307
2013 Plan | Restricted Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awards vested (in shares)						47,829
Weighted average grant date value of awards vested (in dollars per share)						$ 12.45
2013 Plan | Restricted Shares | Non Employee Director
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awards granted (in shares)						36,327
2013 Plan | Restricted Shares | Officers and Employees
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awards granted (in shares)						11,502

Share-Based Compensation - Rest

Share-Based Compensation - Restricted Share Grant Activity (Details) - Restricted Shares - $ / shares	6 Months Ended	12 Months Ended
	Jun. 30, 2024	Dec. 31, 2023	Dec. 31, 2022
Number of non-vested restricted shares
Unvested, beginning balance (in shares)	85,378	115,693
Granted (in shares)	54,851	47,829
Vested (in shares)	(41,944)	(78,144)
Unvested, ending balance (in shares)	98,285	85,378	115,693
Weighted average grant date fair value
Unvested, beginning balance (in dollars per share)	$ 11.44	$ 10.16
Granted (in dollars per share)	15.03	12.45
Vested (in dollars per share)	11.92	10.16
Unvested, ending balance (in dollars per share)	$ 13.24	$ 11.44	$ 10.16
Weighted average remaining contractual term (years)
Weighted average remaining contractual term (years)	1 year 1 month 13 days	9 months 21 days	1 year 14 days

Share-Based Compensation - Stoc

Share-Based Compensation - Stock Option Activity (Details) - USD ($)	6 Months Ended	12 Months Ended
	Jun. 30, 2024	Dec. 31, 2023
Number of options outstanding
Beginning balance (in shares)	547,393	320,856
Forfeited during the year (in shares)		(35,875)
Issuance during the year (in shares)		262,412
Expired during the period (in shares)	(143,538)
Ending balance (in shares)	403,855	547,393
Weighted average exercise price per share
Beginning balance (in dollars per share)	$ 18.25	$ 20.99
Forfeited during the year (in dollars per share)		22.35
Issuance during the year (in dollars per share)		15.45
Expired during the period (in dollars per share)	24.29
Ending balance (in dollars per share)	$ 16.10	$ 18.25
Aggregate intrinsic value
Outstanding	$ 609,648	$ 53,100

Commitments and Contingencies -

Commitments and Contingencies - Summary of Contractual Obligations (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Ethylene Export Terminal capital contributions
2024	$ 70,931
2025	0
2026	0
2027	0
2028	0
Thereafter	0
Total	70,931
Office operating leases
2024	680
2025	1,266
2026	1,058
2027	1,267
2028	0
Thereafter	0
Total	4,271	$ 4,646
Total contractual obligations
2024	133,178
2025	393,882
2026	108,274
2027	106,894
2028	89,186
Thereafter	84,830
Total	916,244
Secured term loan facilities and revolving credit facilities
Long-term debt
2024	61,567
2025	292,616
2026	107,216
2027	67,539
2028	89,186
Thereafter	84,830
Total	702,954
2020 Bonds
Long-term debt
2024	0
2025	100,000
2026	0
2027	0
2028	0
Thereafter	0
Total	100,000
Navigator Aurora Facility
Long-term debt
2024	0
2025	0
2026	0
2027	38,088
2028	0
Thereafter	0
Total	$ 38,088

Commitments and Contingencies_2

Commitments and Contingencies - Additional Information (Details)	6 Months Ended	12 Months Ended
	Jun. 30, 2024 USD ($) contract	Dec. 31, 2023 contract
Lessee, Lease, Description [Line Items]
Export Terminal Joint Venture remaining capital contributions	$ 70,931,000
Number of operating leases contracts | contract	4	4
Weighted average remaining contractual operating lease term	2 years 5 months 15 days	3 years 2 months 1 day
Office Space
Lessee, Lease, Description [Line Items]
Number of operating leases contracts | contract	4	4
Weighted average remaining contractual operating lease term	2 years 5 months 19 days	3 years 10 months 17 days
London
Lessee, Lease, Description [Line Items]
Operating lease term	10 years
Operating lease annual gross rent	$ 1,100,000
Operating lease Initial rent free period	27 months
Operating lease rent free period repayable based on break option exercised	13 months
Texas
Lessee, Lease, Description [Line Items]
Operating lease annual gross rent	$ 60,000
Poland
Lessee, Lease, Description [Line Items]
Operating lease annual gross rent	64,000
Copenhagen
Lessee, Lease, Description [Line Items]
Operating lease annual gross rent	$ 180,000

Operating Lease Liabilities - A

Operating Lease Liabilities - Additional Information (Details) - contract	6 Months Ended	12 Months Ended
	Jun. 30, 2024	Dec. 31, 2023
Leases [Abstract]
Number of operating leases contracts	4	4
Weighted average discount rate	2.93%	2.95%
Weighted average remaining operating lease term	2 years 5 months 15 days	3 years 2 months 1 day

Operating Lease Liabilities - M

Operating Lease Liabilities - Maturity Analysis of The Undiscounted Cash Flows of Operating Lease Liabilities (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Leases [Abstract]
One year	$ 1,327	$ 1,027
Two years	1,143	1,279
Three years	1,801	1,066
Four years	0	1,274
Total	4,271	4,646
Less: Discount adjustment	(170)	(232)
Total operating lease liabilities	4,101	4,414
Less: current portion	(1,234)	(914)
Operating lease liabilities, non-current portion	$ 2,867	$ 3,500

Cash, Cash Equivalents and Re_3

Cash, Cash Equivalents and Restricted Cash (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Cash and Cash Equivalents [Line Items]
Restricted cash	$ 9,342	$ 8,638
Total cash, cash equivalents and restricted cash	138,456	158,242
Consolidated Entity, Excluding Consolidated VIE
Cash and Cash Equivalents [Line Items]
Cash and cash equivalents	128,703	149,581
Variable Interest Entity, Primary Beneficiary
Cash and Cash Equivalents [Line Items]
Cash and cash equivalents	$ 411	$ 23

Variable Interest Entities (Det

Variable Interest Entities (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2024	Dec. 31, 2023
Variable Interest Entity [Line Items]
Total assets	$ 2,129,640	$ 2,202,685
Total liabilities	905,564	969,611
OCY Aurora Ltd [Member]
Variable Interest Entity [Line Items]
Total assets	171,000	179,800
Total liabilities	$ 58,700	$ 61,400
PT Navigator Khatulistiwa [Member]
Variable Interest Entity [Line Items]
Variable interest entity, ownership percentage	49%
OCY Aurora Ltd [Member]
Variable Interest Entity [Line Items]
Operating lease term	13 years
Call option initial value	$ 44,800
Navigator Crewing Philippines Inc. [Member]
Variable Interest Entity [Line Items]
Variable interest entity, ownership percentage	25%
Navigator Gas Services Philippines Inc. [Member]
Variable Interest Entity [Line Items]
Variable interest entity, ownership percentage	40%

Related Party Transactions - In

Related Party Transactions - Income (Expenses) With Related Parties (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Related Party Transaction [Line Items]
Net income / (expenses)	$ (776)	$ (823)	$ (1,562)	$ (1,714)
Luna Pool Agency Limited
Related Party Transaction [Line Items]
Net income / (expenses)	(28)	(17)	(36)	(17)
Ocean Yield Malta Limited
Related Party Transaction [Line Items]
Net income / (expenses)	(732)	(774)	(1,495)	(1,589)
Ultranav Business Support ApS
Related Party Transaction [Line Items]
Net income / (expenses)	$ (16)	$ (32)	$ (31)	$ (108)

Related Party Transactions - Du

Related Party Transactions - Due From Related Parties (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Related Party Transaction [Line Items]
Amounts due from related parties	$ 25,278	$ 33,402
Related Party
Related Party Transaction [Line Items]
Amounts due from related parties	25,278	33,402
Related Party | Luna Pool Agency Limited
Related Party Transaction [Line Items]
Amounts due from related parties	20,546	30,804
Related Party | Unigas Pool
Related Party Transaction [Line Items]
Amounts due from related parties	$ 4,732	$ 2,598

Related Party Transactions - _2

Related Party Transactions - Due To Related Parties (Details) - Related Party - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Related Party Transaction [Line Items]
Due to related parties	$ 38,593	$ 41,948
Ocean Yield Malta Limited
Related Party Transaction [Line Items]
Due to related parties	38,593	41,912
Naviera Ultranav Dos Limitada
Related Party Transaction [Line Items]
Due to related parties	$ 0	$ 36

Related Party Transactions - Ad

Related Party Transactions - Additional Information (Details)	6 Months Ended
	Jun. 30, 2024
Principal Owner | Ultranav Business Support ApS
Related Party Transaction [Line Items]
Contract termination, notice period	6 months
Naviera Ultranav Dos Limitada | Navigator Holdings Ltd.
Related Party Transaction [Line Items]
Shareholder percentage	30.50%
BW Group | BW Group
Related Party Transaction [Line Items]
Shareholder percentage	21.40%

Subsequent Events (Details)

Subsequent Events (Details) - USD ($) $ / shares in Units, $ in Thousands			2 Months Ended	3 Months Ended		6 Months Ended
	Aug. 14, 2024	Aug. 09, 2024	Sep. 30, 2024	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Subsequent Event [Line Items]
Repurchase of common stock				$ 52,823	$ 16,521	$ 53,624	$ 44,630
Dividend and Share Repurchases, as percentage of net income				25%
Forecast
Subsequent Event [Line Items]
Repurchase of common stock			$ 2,300
Subsequent Event
Subsequent Event [Line Items]
Dividend declared (in dollars per share)	$ 0.05
Dividends declared	$ 3,600
Subsequent Event | August 2024 Facility
Subsequent Event [Line Items]
Debt term		6 years
Maximum principal amount		$ 147,600
Final balloon payment		$ 63,900
Subsequent Event | August 2024 Facility | SOFR
Subsequent Event [Line Items]
Basis spread on variable rate (as a percent)		1.90%
Subsequent Event | August 2024 Facility | Sustainability-Linked Element
Subsequent Event [Line Items]
Basis spread on variable rate (as a percent)		0.05%