Martin Midstream Partners (MMLP) 10-Q 25 Jul 22 2022 Q2 Quarterly report Financial data

Cover Page

Cover Page - shares	6 Months Ended
	Jun. 30, 2022	Jul. 25, 2022
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Jun. 30, 2022
Document Transition Report	false
Entity File Number	000-50056
Entity Registrant Name	MARTIN MIDSTREAM PARTNERS L.P.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	05-0527861
Entity Address, Address Line One	4200 Stone Road
Entity Address, City or Town	Kilgore
Entity Address, State or Province	TX
Entity Address, Postal Zip Code	75662
City Area Code	903
Local Phone Number	983-6200
Title of each class	Common Units representing limited partnership interests
Trading Symbol(s)	MMLP
Name of each exchange on which registered	NASDAQ
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding (in shares)		38,850,750
Entity Central Index Key	0001176334
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2022
Document Fiscal Period Focus	Q2
Amendment Flag	false

CONSOLIDATED AND CONDENSED BALA

CONSOLIDATED AND CONDENSED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Assets
Cash	$ 43	$ 52
Accounts and other receivables, less allowance for doubtful accounts of $559 and $311, respectively	73,485	84,199
Inventories	117,845	62,120
Due from affiliates	16,558	14,409
Other current assets	29,554	12,908
Total current assets	237,485	173,688
Property, plant and equipment, at cost	898,379	898,770
Accumulated depreciation	(566,799)	(553,300)
Property, plant and equipment, net	331,580	345,470
Goodwill	16,823	16,823
Right-of-use assets	30,249	21,861
Deferred income taxes, net	17,517	19,821
Other assets, net	2,507	2,198
Total assets	636,161	579,861
Liabilities and Partners’ Capital (Deficit)
Current installments of long-term debt and finance lease obligations	169	280
Trade and other accounts payable	105,156	70,342
Product exchange payables	537	1,406
Due to affiliates	9,764	1,824
Income taxes payable	753	385
Other accrued liabilities	31,513	29,850
Total current liabilities	147,892	104,087
Long-term debt, net	489,325	498,871
Finance lease obligations	0	9
Operating lease liabilities	22,455	15,704
Other long-term obligations	7,343	9,227
Total liabilities	667,015	627,898
Commitments and contingencies
Partners’ capital (deficit)	(31,021)	(48,853)
Accumulated other comprehensive income (loss)	167	816
Total partners’ capital (deficit)	(30,854)	(48,037)
Total liabilities and partners' capital (deficit)	$ 636,161	$ 579,861

CONSOLIDATED AND CONDENSED BA_2

CONSOLIDATED AND CONDENSED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Statement of Financial Position [Abstract]
Allowance for doubtful accounts	$ 559	$ 311

CONSOLIDATED AND CONDENSED STAT

CONSOLIDATED AND CONDENSED STATEMENTS OF OPERATIONS (Unaudited) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Revenues:
Revenues		$ 266,996	$ 184,293	$ 546,197	$ 385,267
Cost of products sold: (excluding depreciation and amortization)
Cost of products sold		156,926	105,993	328,508	220,844
Expenses:
Operating expenses	[1]	64,082	47,313	120,577	91,947
Selling, general and administrative	[1]	9,944	8,960	21,147	19,569
Depreciation and amortization		14,800	14,483	29,286	28,917
Total costs and expenses		245,752	176,749	499,518	361,277
Other operating income (loss), net		246	89	260	(671)
Operating income		21,490	7,633	46,939	23,319
Other income (expense):
Interest expense, net		(12,846)	(13,309)	(25,275)	(26,262)
Other, net		(1)	(1)	(2)	(1)
Total other expense		(12,847)	(13,310)	(25,277)	(26,263)
Net income before taxes		8,643	(5,677)	21,662	(2,944)
Income tax expense		(2,037)	(935)	(3,578)	(1,157)
Net income		6,606	(6,612)	18,084	(4,101)
Less general partner's interest in net income		(132)	132	(362)	82
Less income allocable to unvested restricted units		(21)	20	(51)	10
Limited partners' interest in net income		$ 6,453	$ (6,460)	$ 17,671	$ (4,009)
Net income per unit attributable to limited partners - basic (in dollars per share)		$ 0.17	$ (0.17)	$ 0.46	$ (0.10)
Net income per unit attributable to limited partners - diluted (in dollars per share)		$ 0.17	$ (0.17)	$ 0.46	$ (0.10)
Weighted average limited partner units - basic (in shares)		38,729,118	38,687,874	38,725,701	38,690,228
Weighted average limited partner units - diluted (in shares)		38,750,153	38,687,874	38,753,197	38,690,228
Terminalling and storage
Revenues:
Revenues	[1]	$ 20,439	$ 18,702	$ 39,852	$ 37,080
Transportation
Revenues:
Revenues	[1]	55,832	34,926	102,542	64,741
Sulfur services
Revenues:
Revenues		3,084	2,949	6,168	5,899
Product sales
Revenues:
Revenues	[1]	187,641	127,716	397,635	277,547
Natural gas liquids
Revenues:
Revenues	[1]	97,580	67,232	218,143	165,317
Cost of products sold: (excluding depreciation and amortization)
Cost of products sold	[1]	91,584	61,590	198,682	140,725
Sulfur services
Revenues:
Revenues	[1]	53,869	35,337	109,908	67,222
Cost of products sold: (excluding depreciation and amortization)
Cost of products sold	[1]	37,063	24,177	74,848	45,391
Terminalling and storage
Revenues:
Revenues	[1]	36,192	25,147	69,584	45,008
Cost of products sold: (excluding depreciation and amortization)
Cost of products sold	[1]	$ 28,279	$ 20,226	$ 54,978	$ 34,728
[1]Related Party Transactions Included Above Three Months Ended Six Months Ended June 30, June 30, 2022 2021 2022 2021 Revenues:* Terminalling and storage $ 17,416 $ 15,569 $ 33,620 $ 30,875 Transportation 7,463 4,889 13,751 8,899 Product Sales 95 71 416 185 Costs and expenses:* Cost of products sold: (excluding depreciation and amortization) Sulfur services 2,592 2,403 5,268 4,938 Terminalling and storage 10,209 7,036 19,860 11,604 Expenses: Operating expenses 23,446 19,590 44,826 37,958 Selling, general and administrative 7,498 7,285 16,306 15,965

CONSOLIDATED AND CONDENSED ST_2

CONSOLIDATED AND CONDENSED STATEMENTS OF OPERATIONS (Unaudited) - Related Party Transactions (Parentheticals) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Revenues:
Revenues		$ 266,996	$ 184,293	$ 546,197	$ 385,267
Cost of products sold: (excluding depreciation and amortization)
Cost of products sold		156,926	105,993	328,508	220,844
Expenses:
Operating expenses		23,446	19,590	44,826	37,958
Selling, general and administrative		7,498	7,285	16,306	15,965
Terminalling and storage
Revenues:
Revenues	[1]	20,439	18,702	39,852	37,080
Transportation
Revenues:
Revenues	[1]	55,832	34,926	102,542	64,741
Product Sales
Revenues:
Revenues	[1]	187,641	127,716	397,635	277,547
Sulfur services
Revenues:
Revenues	[1]	53,869	35,337	109,908	67,222
Cost of products sold: (excluding depreciation and amortization)
Cost of products sold	[1]	37,063	24,177	74,848	45,391
Terminalling and storage
Revenues:
Revenues	[1]	36,192	25,147	69,584	45,008
Cost of products sold: (excluding depreciation and amortization)
Cost of products sold	[1]	28,279	20,226	54,978	34,728
Related Party
Expenses:
Operating expenses		23,446	19,590	44,826	37,958
Related Party | Terminalling and storage
Revenues:
Revenues		17,416	15,569	33,620	30,875
Expenses:
Operating expenses		4,668	4,127	9,030	8,229
Related Party | Transportation
Revenues:
Revenues		7,463	4,889	13,751	8,899
Expenses:
Operating expenses		16,471	13,644	31,734	26,703
Related Party | Product Sales
Revenues:
Revenues		95	71	416	185
Related Party | Sulfur services
Cost of products sold: (excluding depreciation and amortization)
Cost of products sold		2,592	2,403	5,268	4,938
Expenses:
Operating expenses		1,789	1,306	3,034	2,049
Related Party | Terminalling and storage
Cost of products sold: (excluding depreciation and amortization)
Cost of products sold		$ 10,209	$ 7,036	$ 19,860	$ 11,604
[1]Related Party Transactions Included Above Three Months Ended Six Months Ended June 30, June 30, 2022 2021 2022 2021 Revenues:* Terminalling and storage $ 17,416 $ 15,569 $ 33,620 $ 30,875 Transportation 7,463 4,889 13,751 8,899 Product Sales 95 71 416 185 Costs and expenses:* Cost of products sold: (excluding depreciation and amortization) Sulfur services 2,592 2,403 5,268 4,938 Terminalling and storage 10,209 7,036 19,860 11,604 Expenses: Operating expenses 23,446 19,590 44,826 37,958 Selling, general and administrative 7,498 7,285 16,306 15,965

CONSOLIDATED AND CONDENSED ST_3

CONSOLIDATED AND CONDENSED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 6,606	$ (6,612)	$ 18,084	$ (4,101)
Changes in fair values of commodity cash flow hedges	167	0	167	0
Commodity cash flow hedging (gains) losses reclassified to earnings	440	0	(816)	0
Comprehensive income	$ 7,213	$ (6,612)	$ 17,435	$ (4,101)

CONSOLIDATED AND CONDENSED ST_4

CONSOLIDATED AND CONDENSED STATEMENTS OF CAPITAL (DEFICIT) (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Increase (Decrease) in Partners' Capital
Beginning balance			$ (48,037)	$ (46,871)
Net income	$ 6,606	$ (6,612)	18,084	(4,101)
Cash distributions			(396)	(396)
Unit-based compensation			79	288
Gain reclassified from AOCI into income on commodity cash flow hedges			(816)
Gain recognized in AOCI on commodity cash flow hedges			167
Excess purchase price over carrying value of acquired assets			65
Purchase of treasury units				(17)
Ending balance	(30,854)	(51,097)	(30,854)	(51,097)
Common Limited | Common
Increase (Decrease) in Partners' Capital
Beginning balance			$ (50,741)	$ (48,776)
Beginning balance (in shares)			38,802,750	38,851,174
Net income			$ 17,722	$ (4,019)
Issuance of restricted units (in shares)			48,000	42,168
Forfeiture of restricted units (in shares)				(83,436)
Cash distributions			$ (388)	$ (388)
Unit-based compensation			79	288
Excess purchase price over carrying value of acquired assets			65
Purchase of treasury units				$ (17)
Purchase of treasury units (in shares)				(7,156)
Ending balance	$ (33,263)	$ (52,912)	$ (33,263)	$ (52,912)
Ending balance (in shares)	38,850,750	38,802,750	38,850,750	38,802,750
General Partner Amount
Increase (Decrease) in Partners' Capital
Beginning balance			$ 1,888	$ 1,905
Net income			362	(82)
Cash distributions			(8)	(8)
Ending balance	$ 2,242	$ 1,815	2,242	1,815
Accumulated Other Comprehensive Income (Loss)
Increase (Decrease) in Partners' Capital
Beginning balance			816	0
Gain reclassified from AOCI into income on commodity cash flow hedges			(816)
Gain recognized in AOCI on commodity cash flow hedges			167
Ending balance	$ 167	$ 0	$ 167	$ 0

CONSOLIDATED AND CONDENSED ST_5

CONSOLIDATED AND CONDENSED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Cash flows from operating activities:
Net income (loss)	$ 18,084	$ (4,101)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization	29,286	28,917
Amortization of deferred debt issuance costs	1,568	1,521
Deferred income tax expense	2,304	758
(Gain) loss on sale of property, plant and equipment, net	(260)	671
Derivative (income) loss	(734)	884
Net cash paid for commodity derivatives	85	(679)
Non cash unit-based compensation	79	288
Change in current assets and liabilities, excluding effects of acquisitions and dispositions:
Accounts and other receivables	10,714	(2,303)
Inventories	(55,725)	(17,572)
Due from affiliates	(2,149)	(5,812)
Other current assets	(17,741)	1,435
Trade and other accounts payable	37,688	3,335
Product exchange payables	(869)	327
Due to affiliates	7,940	1,504
Income taxes payable	368	(248)
Other accrued liabilities	(2,332)	(3,053)
Change in other non-current assets and liabilities	145	213
Net cash provided by operating activities	28,451	6,085
Cash flows from investing activities:
Payments for property, plant and equipment	(14,634)	(8,200)
Payments for plant turnaround costs	(1,600)	(1,694)
Proceeds from sale of property, plant and equipment	689	133
Net cash used in investing activities	(15,545)	(9,761)
Cash flows from financing activities:
Payments of long-term debt	(217,589)	(144,790)
Payments under finance lease obligations	(119)	(2,591)
Proceeds from long-term debt	206,500	147,500
Purchase of treasury units	0	(17)
Payment of debt issuance costs	(26)	(307)
Excess purchase price over carrying value of acquired assets	(1,285)	0
Cash distributions paid	(396)	(396)
Net cash used in financing activities	(12,915)	(601)
Net increase (decrease) in cash	(9)	(4,277)
Cash at beginning of period	52	4,958
Cash at end of period	43	681
Non-cash additions to property, plant and equipment	$ 1,705	$ 686

Nature of Operations and Basis

Nature of Operations and Basis of Presentation	6 Months Ended
	Jun. 30, 2022
Accounting Policies [Abstract]
Nature of Operations and Basis of Presentation	NATURE OF OPERATIONS AND BASIS OF PRESENTATION Martin Midstream Partners L.P. (the "Partnership") is a publicly traded limited partnership with a diverse set of operations focused primarily in the Gulf Coast region of the United States ("U.S."). Its four primary business lines include: terminalling, processing, storage and packaging services for petroleum products and by-products including the refining of naphthenic crude oil; land and marine transportation services for petroleum products and by-products, chemicals, and specialty products; sulfur and sulfur-based products processing, manufacturing, marketing and distribution; and NGL marketing, distribution, and transportation services. The Partnership’s unaudited consolidated and condensed financial statements have been prepared in accordance with the requirements of Form 10-Q and U.S. Generally Accepted Accounting Principles ("U.S. GAAP") for interim financial reporting. Accordingly, these financial statements have been condensed and do not include all of the information and footnotes required by U.S. GAAP for annual audited financial statements of the type contained in the Partnership’s annual reports on Form 10-K. In the opinion of the management of the Partnership’s general partner, all adjustments and elimination of significant intercompany balances necessary for a fair presentation of the Partnership’s financial position, results of operations, and cash flows for the periods shown have been made. All such adjustments are of a normal recurring nature. Results for such interim periods are not necessarily indicative of the results of operations for the full year. These financial statements should be read in conjunction with the Partnership’s audited consolidated financial statements and notes thereto included in the Partnership’s annual report on Form 10-K for the year ended December 31, 2021, filed with the SEC on March 1, 2022. Management has made a number of estimates and assumptions relating to the reporting of assets and liabilities and the disclosure of contingent assets and liabilities to prepare these consolidated and condensed financial statements in conformity with U.S. GAAP. Actual results could differ from those estimates.

New Accounting Pronouncements

New Accounting Pronouncements	6 Months Ended
	Jun. 30, 2022
Accounting Changes and Error Corrections [Abstract]
New Accounting Pronouncements	NEW ACCOUNTING PRONOUNCEMENTS On January 1, 2021, the Partnership adopted Financial Accounting Standards Board ("FASB") Accounting Standards Update ("ASU") 2019-12, Income Taxes (Accounting Standards Codification ("ASC") Topic 740): Simplifying the Accounting for Income Taxes , which removes certain exceptions to general principles in ASC 740 and clarifies and amends existing guidance within U.S. GAAP. Adoption of the new standard did not have a material impact on the Partnership’s consolidated financial statements.

Revenue

Revenue	6 Months Ended
	Jun. 30, 2022
Revenue from Contract with Customer [Abstract]
Revenue	REVENUE The following table disaggregates our revenue by major source: Three Months Ended June 30, Six Months Ended June 30, 2022 2021 2022 2021 Terminalling and storage segment Lubricant product sales $ 36,192 $ 25,147 $ 69,584 $ 45,008 Throughput and storage 20,439 18,702 39,852 37,080 $ 56,631 $ 43,849 $ 109,436 $ 82,088 Natural gas liquids segment Natural gas liquids product sales $ 97,580 $ 67,232 $ 218,143 $ 165,317 $ 97,580 $ 67,232 $ 218,143 $ 165,317 Sulfur services segment Sulfur product sales $ 13,565 $ 7,386 $ 23,634 $ 14,454 Fertilizer product sales 40,304 27,951 86,274 52,768 Sulfur services 3,084 2,949 6,168 5,899 $ 56,953 $ 38,286 $ 116,076 $ 73,121 Transportation segment Land transportation $ 42,980 $ 27,486 $ 78,485 $ 50,442 Inland transportation 11,036 6,633 20,455 13,357 Offshore transportation 1,816 807 3,602 942 $ 55,832 $ 34,926 $ 102,542 $ 64,741 Revenue is measured based on a consideration specified in a contract with a customer and excludes amounts collected on behalf of third parties where the Partnership is acting as an agent. The Partnership recognizes revenue when the Partnership satisfies a performance obligation, which typically occurs when the Partnership transfers control over a product to a customer or as the Partnership delivers a service. The following is a description of the principal activities - separated by reportable segments - from which the Partnership generates revenue. Terminalling and Storage Segment Revenue is recognized for storage contracts based on the contracted monthly tank fixed fee. For throughput contracts, revenue is recognized based on the volume moved through the Partnership’s terminals at the contracted rate. For the Partnership’s tolling agreement, revenue is recognized based on the contracted monthly reservation fee and throughput volumes moved through the facility. When lubricants and drilling fluids are sold by truck or rail, revenue is recognized when title is transferred, which is either upon delivering product to the customer or when the product leaves the Partnership's facility, depending on the specific terms of the contract. Delivery of product is invoiced as the transaction occurs and is generally paid within a month. Throughput and storage revenue in the table above includes non-cancelable revenue arrangements that are under the scope of ASC 842, whereby the Partnership has committed certain Terminalling and Storage assets in exchange for a minimum fee. Natural Gas Liquids Segment Natural Gas Liquids ("NGL") revenue is recognized when product is delivered by truck, rail, or pipeline to the Partnership's NGL customers. Revenue is recognized on title transfer of the product to the customer. Delivery of product is invoiced as the transaction occurs and is generally paid within a month. Sulfur Services Segment Revenue from sulfur and fertilizer product sales is recognized when the customer takes title to the product. Delivery of product is invoiced as the transaction occurs and is generally paid within a month. Revenue from sulfur services is recognized as services are performed during each monthly period. The performance of the service is invoiced as the transaction occurs and is generally paid within a month. Transportation Segment Revenue related to land transportation is recognized for line hauls based on a mileage rate. For contracted trips, revenue is recognized upon completion of the particular trip. The performance of the service is invoiced as the transaction occurs and is generally paid within a month. Revenue related to marine transportation is recognized for time charters based on a per day rate. For contracted trips, revenue is recognized upon completion of the particular trip. The performance of the service is invoiced as the transaction occurs and is generally paid within a month. The table below includes estimated minimum revenue expected to be recognized in the future related to performance obligations that are unsatisfied at the end of the reporting period. The Partnership applies the practical expedient in ASC 606-10-50-14(a) and does not disclose information about remaining performance obligations that have original expected durations of one year or less. 2022 2023 2024 2025 2026 Thereafter Total Terminalling and storage Throughput and storage $ 21,517 $ 42,247 $ 43,571 $ 44,878 $ 46,164 $ 252,476 $ 450,853 Natural Gas Services Natural Gas Liquids 2,814 5,391 5,405 5,391 3,131 — 22,132 Sulfur services Sulfur product sales 8,853 17,703 15,993 3,656 1,931 295 48,431 Total $ 33,184 $ 65,341 $ 64,969 $ 53,925 $ 51,226 $ 252,771 $ 521,416

Inventories

Inventories	6 Months Ended
	Jun. 30, 2022
Inventory Disclosure [Abstract]
Inventories	INVENTORIES Components of inventories at June 30, 2022 and December 31, 2021 were as follows: June 30, December 31, Natural gas liquids $ 67,614 $ 20,034 Sulfur 1,480 612 Fertilizer 21,009 13,005 Lubricants 23,262 23,876 Other 4,480 4,593 $ 117,845 $ 62,120

Debt

Debt	6 Months Ended
	Jun. 30, 2022
Debt Disclosure [Abstract]
Debt	DEBT At June 30, 2022 and December 31, 2021, long-term debt consisted of the following: June 30, December 31, $275,000 Credit facility at variable interest rate (5.00% 1 weighted average at June 30, 2022), due August 2023 secured by substantially all of the Partnership’s assets, including, without limitation, inventory, accounts receivable, vessels, equipment, fixed assets and the interests in the Partnership’s operating subsidiaries, net of unamortized debt issuance costs of $1,851 and $2,613, respectively 2 $ 147,149 $ 156,887 $53,750 Senior notes due February 2024, 10.0% interest, net of unamortized debt issuance costs of $1,860 and $2,433, respectively, secured 2,3 51,890 51,317 $291,381 Senior notes due February 2025, 11.5% interest, net of unamortized debt issuance costs of $1,095 and $1,303, respectively, secured 2,3,4 290,286 290,667 Total 489,325 498,871 Less: current portion — — Total long-term debt, net of current portion $ 489,325 $ 498,871 Current installments of finance lease obligations $ 169 $ 280 Finance lease obligations — 9 Total finance lease obligations $ 169 $ 289 1 Interest rate fluctuates based on LIBOR (set on the date of each advance) or the base prime rate plus an applicable margin. The margin is set every three months. All amounts outstanding at December 31, 2021 and June 30, 2022 were at LIBOR plus an applicable margin with LIBOR having a floor of 1.00% per annum. The applicable margin for revolving loans that are LIBOR loans currently ranges from 2.75% to 4.00%, and the applicable margin for revolving loans that are base prime rate loans currently ranges from 1.75% to 3.00%. The applicable margin for LIBOR borrowings at June 30, 2022 is 3.25%. The applicable margin for LIBOR borrowings effective July 20, 2022 is 3.00%. The credit facility contains various covenants that limit the Partnership’s ability to make distributions; make certain investments and acquisitions; enter into certain agreements; incur indebtedness; sell assets; and make certain amendments to the Partnership's omnibus agreement with Martin Resource Management Corporation (the "Omnibus Agreement"). The credit facility was amended on July 16, 2021 to, among other things, reduce the commitments thereunder from $300,000 to $275,000. 2 The Partnership was in compliance with all debt covenants as of June 30, 2022 and December 31, 2021, respectively. 3 The indentures for each of the outstanding series of senior notes restrict the Partnership’s ability to sell assets; pay distributions or repurchase units or redeem or repurchase subordinated debt; make investments; incur or guarantee additional indebtedness or issue preferred units; and consolidate, merge or transfer all or substantially all of its assets. 4 On April 14, 2022, the Partnership completed the payment of an aggregate principal amount of approximately $589, or approximately 0.20%, of its 11.50% Senior Secured Second Lien Notes due 2025 (the “2025 Notes”), pursuant to its cash tender offer (the “Excess Cash Flow Offer”) to purchase up to $9,305 aggregate principal amount of the 2025 Notes. The purchase price for the tendered 2025 Notes was 100% of the aggregate principal amount thereof, plus accrued and unpaid interest to, but not including, the purchase date.

Leases

Leases	6 Months Ended
	Jun. 30, 2022
Leases [Abstract]
Leases	LEASES The Partnership has numerous operating leases primarily for terminal facilities and transportation and other equipment. The leases generally provide that all expenses related to the equipment are to be paid by the lessee. Operating lease Right-of-Use assets and operating lease liabilities are recognized based on the present value of lease payments over the lease term at commencement date. Because most of the Partnership's leases do not provide an implicit rate of return, the Partnership uses its imputed collateralized rate based on the information available at commencement date in determining the present value of lease payments. The estimated rate is based on a risk-free rate plus a risk-adjusted margin. Our leases have remaining lease terms of 1 year to 14 years, some of which include options to extend the leases for up to 5 years, and some of which include options to terminate the leases within 1 year. The Partnership includes extension periods and excludes termination periods from its lease term if, at commencement, it is reasonably likely that the Partnership will exercise the option. The components of lease expense for the six months ended June 30, 2022 and 2021 were as follows: Three Months Ended June 30, Six Months Ended June 30, 2022 2022 2021 2022 2021 Operating lease cost $ 2,540 $ 2,199 $ 4,811 $ 4,501 Finance lease cost: Amortization of right-of-use assets $ 25 25 $ 50 115 Interest on lease liabilities $ 3 6 $ 7 16 Short-term lease cost $ 2,887 2,473 $ 5,505 5,581 Variable lease cost $ 41 $ 26 $ 84 $ 59 Total lease cost $ 5,496 $ 4,729 $ 10,457 $ 10,272 Supplemental balance sheet information related to leases at June 30, 2022 and December 31, 2021 was as follows: June 30, December 31, 2021 Operating Leases Operating lease right-of-use assets $ 30,249 $ 21,861 Current portion of operating lease liabilities included in "Other accrued liabilities" $ 8,207 $ 6,600 Operating lease liabilities $ 22,455 15,704 Total operating lease liabilities $ 30,662 $ 22,304 Finance Leases Property, plant and equipment, at cost $ 1,071 $ 1,071 Accumulated depreciation $ (413) (364) Property, plant and equipment, net $ 658 $ 707 Current installments of finance lease obligations $ 169 $ 280 Finance lease obligations $ — 9 Total finance lease obligations $ 169 $ 289 The Partnership’s future minimum lease obligations as of June 30, 2022 consist of the following: Operating Leases Finance Leases Year 1 $ 9,463 $ 172 Year 2 6,772 — Year 3 4,713 — Year 4 3,889 — Year 5 2,829 — Thereafter 7,954 — Total $ 35,620 $ 172 Less amounts representing interest costs (4,958) (3) Total lease liability $ 30,662 $ 169 The Partnership has non-cancelable revenue arrangements that are under the scope of ASC 842 whereby we have committed certain terminalling and storage assets in exchange for a minimum fee. Future minimum revenues the Partnership expects to receive under these non-cancelable arrangements as of June 30, 2022 are as follows: 2022 - $10,740; 2023 - $15,807; 2024 - $15,322; 2025 - $14,742; 2026 - $8,977; subsequent years - $32,936.
Leases	LEASES The Partnership has numerous operating leases primarily for terminal facilities and transportation and other equipment. The leases generally provide that all expenses related to the equipment are to be paid by the lessee. Operating lease Right-of-Use assets and operating lease liabilities are recognized based on the present value of lease payments over the lease term at commencement date. Because most of the Partnership's leases do not provide an implicit rate of return, the Partnership uses its imputed collateralized rate based on the information available at commencement date in determining the present value of lease payments. The estimated rate is based on a risk-free rate plus a risk-adjusted margin. Our leases have remaining lease terms of 1 year to 14 years, some of which include options to extend the leases for up to 5 years, and some of which include options to terminate the leases within 1 year. The Partnership includes extension periods and excludes termination periods from its lease term if, at commencement, it is reasonably likely that the Partnership will exercise the option. The components of lease expense for the six months ended June 30, 2022 and 2021 were as follows: Three Months Ended June 30, Six Months Ended June 30, 2022 2022 2021 2022 2021 Operating lease cost $ 2,540 $ 2,199 $ 4,811 $ 4,501 Finance lease cost: Amortization of right-of-use assets $ 25 25 $ 50 115 Interest on lease liabilities $ 3 6 $ 7 16 Short-term lease cost $ 2,887 2,473 $ 5,505 5,581 Variable lease cost $ 41 $ 26 $ 84 $ 59 Total lease cost $ 5,496 $ 4,729 $ 10,457 $ 10,272 Supplemental balance sheet information related to leases at June 30, 2022 and December 31, 2021 was as follows: June 30, December 31, 2021 Operating Leases Operating lease right-of-use assets $ 30,249 $ 21,861 Current portion of operating lease liabilities included in "Other accrued liabilities" $ 8,207 $ 6,600 Operating lease liabilities $ 22,455 15,704 Total operating lease liabilities $ 30,662 $ 22,304 Finance Leases Property, plant and equipment, at cost $ 1,071 $ 1,071 Accumulated depreciation $ (413) (364) Property, plant and equipment, net $ 658 $ 707 Current installments of finance lease obligations $ 169 $ 280 Finance lease obligations $ — 9 Total finance lease obligations $ 169 $ 289 The Partnership’s future minimum lease obligations as of June 30, 2022 consist of the following: Operating Leases Finance Leases Year 1 $ 9,463 $ 172 Year 2 6,772 — Year 3 4,713 — Year 4 3,889 — Year 5 2,829 — Thereafter 7,954 — Total $ 35,620 $ 172 Less amounts representing interest costs (4,958) (3) Total lease liability $ 30,662 $ 169 The Partnership has non-cancelable revenue arrangements that are under the scope of ASC 842 whereby we have committed certain terminalling and storage assets in exchange for a minimum fee. Future minimum revenues the Partnership expects to receive under these non-cancelable arrangements as of June 30, 2022 are as follows: 2022 - $10,740; 2023 - $15,807; 2024 - $15,322; 2025 - $14,742; 2026 - $8,977; subsequent years - $32,936.

Supplemental Balance Sheet Info

Supplemental Balance Sheet Information	6 Months Ended
	Jun. 30, 2022
Balance Sheet Related Disclosures [Abstract]
Supplemental Balance Sheet Information	SUPPLEMENTAL BALANCE SHEET INFORMATION Components of "Other accrued liabilities" were as follows: June 30, December 31, 2021 Accrued interest $ 14,733 $ 15,135 Asset retirement obligations 412 261 Property and other taxes payable 3,627 4,631 Accrued payroll 3,802 2,973 Operating lease liabilities 8,207 6,600 Other 732 250 $ 31,513 $ 29,850 The schedule below summarizes the changes in our asset retirement obligations: June 30, 2022 Asset retirement obligations as of December 31, 2021 $ 9,072 Additions to asset retirement obligations — Accretion expense 190 Liabilities settled (3,902) Ending asset retirement obligations 5,360 Current portion of asset retirement obligations 1 (412) Long-term portion of asset retirement obligations 2 $ 4,948 1 The current portion of asset retirement obligations is included in "Other accrued liabilities" on the Partnership's Consolidated and Condensed Balance Sheets. 2 The non-current portion of asset retirement obligations is included in "Other long-term obligations" on the Partnership's Consolidated and Condensed Balance Sheets.

Derivative Instruments and Hedg

Derivative Instruments and Hedging Activities	6 Months Ended
	Jun. 30, 2022
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Instruments and Hedging Activities	DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES The Partnership’s results of operations could be materially impacted by changes in commodity prices and interest rates. In an effort to manage its exposure to these risks, the Partnership periodically enters into various derivative instruments, including commodity and interest rate hedges. At the time derivative contracts are entered into, the Partnership assesses whether the nature of the instrument qualifies for hedge accounting treatment according to the requirements of ASC 815 – Derivatives and Hedging . For those transactions designated as hedging instruments for accounting purposes, the Partnership documents all relationships between hedging instruments and hedged items, as well as our risk-management objective and strategy for undertaking the various hedge transactions. The Partnership also assesses, both at the hedge’s inception and on an ongoing basis, whether the derivatives used in hedging transactions are highly effective in offsetting changes in cash flows or fair value of hedged items. All derivatives and hedging instruments are included on the balance sheet as an asset or a liability measured at fair value. Changes in fair value for hedging instruments are recognized on the balance sheet through Accumulated Other Comprehensive Income ("AOCI"). Settlements related to effective hedging relationships will be reclassified from AOCI to earnings during the term at which the hedged transactions are reflected on the income statement. From time to time, derivatives designated for hedge accounting may be closed prior to contract expiration. The accounting treatment of closed positions depends on whether the closure occurred due to the hedged transaction occurring early or if the hedged transaction is still expected to occur as originally forecasted. For hedged transactions that occur early, the closure results in the realized gain or loss from closure being recognized in the same period the accelerated hedged transaction affects earnings. For hedged transactions that are still expected to occur as originally forecasted, the closure results in the realized gain or loss being deferred until the hedged transaction affects earnings. If it is determined that hedged transactions associated with cash flow hedges are no longer probable of occurring, the gain or loss associated with the instrument is recognized immediately into earnings. From time to time, we may have derivative financial instruments for which we do not elect hedge accounting. Changes in fair value for derivatives not designated as hedges are recognized as gains and losses in the earnings of the periods in which they occur. (a) Commodity Derivative Instruments The Partnership from time to time has used derivatives to manage the risk of commodity price fluctuation. Commodity risk is the adverse effect on the value of a liability or future purchase that results from a change in commodity price. The Partnership has established a hedging policy and monitors and manages the commodity market risk associated with potential commodity risk exposure. In addition, the Partnership has focused on utilizing counterparties for these transactions whose financial condition is appropriate for the credit risk involved in each specific transaction. The Partnership enters into hedging transactions to protect a portion of its commodity price risk exposure. These hedging arrangements are in the form of swaps for NGLs and settle against the applicable pricing source for each grade and location. At June 30, 2022 and December 31, 2021, the Partnership had instruments totaling a gross notional quantity of 0 barrels. For information regarding gains and losses on commodity derivative instruments, see "Tabular Presentation of Gains and Losses on Derivative Instruments" below. (b) Tabular Presentation of Gains and Losses on Derivative Instruments The following table summarizes the fair value and classification of the Partnership’s derivative instruments in its Consolidated and Condensed Balance Sheets: Derivative Assets Derivative Liabilities Fair Values Fair Values Balance Sheet Location June 30, 2022 December 31, 2021 Balance Sheet Location June 30, 2022 December 31, 2021 Derivatives designated as hedging instruments: Current: Commodity contracts Fair value of derivatives $ — $ — Fair value of derivatives $ — $ — The following table summarizes the gain (loss) recognized in AOCI at June 30, 2022 and December 31, 2021, respectively, and the gain (loss) reclassified from accumulated other comprehensive loss into earnings during the three months ended June 30, 2022 and 2021, respectively, for derivative financial instruments designated as cash flow hedges: Amount of Gain (Loss) Recognized in AOCI Location of Gain (Loss) Amount of Gain (Loss) Reclassified from AOCI into Income 2022 2021 2022 2021 Commodity contracts $ 167 $ 816 Cost of products sold $ (440) $ — Total $ 167 $ 816 $ (440) $ — The following table summarizes the gain (loss) recognized in AOCI at June 30, 2022 and December 31, 2021, respectively, and the gain (loss) reclassified from accumulated other comprehensive loss into earnings during the six months ended June 30, 2022 and 2021, respectively, for derivative financial instruments designated as cash flow hedges: Amount of Gain (Loss) Recognized in AOCI Location of Gain (Loss) Amount of Gain (Loss) Reclassified from AOCI into Income 2022 2021 2022 2021 Commodity contracts $ 167 $ 816 Cost of products sold $ 816 $ — Total $ 167 $ 816 $ 816 $ — The following tables summarize the gain (loss) recognized in earnings for derivative instruments not designated as hedging instruments during the three months ended June 30, 2022 and 2021, respectively: Location of Gain (Loss) Amount of Gain (Loss) Recognized in 2022 2021 Derivatives not designated as hedging instruments: Commodity contracts Cost of products sold $ — $ 552 Total effect of derivatives not designated as hedging instruments $ — $ 552 The following tables summarize the gain (loss) recognized in earnings for derivative instruments not designated as hedging instruments during the six months ended June 30, 2022 and 2021, respectively: Location of Gain (Loss) Amount of Gain (Loss) Recognized in 2022 2021 Derivatives not designated as hedging instruments: Commodity contracts Cost of products sold $ — $ (884) Total effect of derivatives not designated as hedging instruments $ — $ (884)

Partners' Capital (Deficit)

Partners' Capital (Deficit)	6 Months Ended
	Jun. 30, 2022
Partners' Capital Notes [Abstract]
Partners' Capital (Deficit)	PARTNERS' CAPITAL (DEFICIT) As of June 30, 2022, Partners’ capital consisted of 38,850,750 common limited partner units, representing a 98% partnership interest, and a 2% general partner interest. Martin Resource Management Corporation, through subsidiaries, owned 6,114,532 of the Partnership's common limited partner units representing approximately 15.7% of the Partnership's outstanding common limited partner units. Martin Midstream GP LLC ("MMGP"), the Partnership's general partner, owns the 2% general partnership interest. The partnership agreement of the Partnership (the "Partnership Agreement") contains specific provisions for the allocation of net income and losses to each of the partners for purposes of maintaining their respective partner capital accounts. Impact on Partners' Capital (Deficit) Related to Transactions Between Entities Under Common Control Under ASC 805, assets and liabilities transferred between entities under common control are accounted for at the historical cost of those entities' ultimate parent, in a manner similar to a pooling of interests. Any difference in the amount paid by the transferee versus the historical cost of the assets transferred is recorded as an adjustment to equity (contribution or distribution) by the transferee. This is in contrast with a business combination between unrelated parties, where assets and liabilities are recorded at their fair values at the acquisition date, with any excess of amounts paid over the fair value representing goodwill. From time to time, the most recent being in 2019, the Partnership has entered into common control acquisitions from Martin Resource Management Corporation. The consideration transferred totaling $552,058 exceeds the historical cost of the net assets received. This excess of the purchase price over the historical cost of the net assets received has resulted in cumulative distributions of $289,019 reflected as reductions to Partners' capital. Incentive Distribution Rights MMGP holds a 2% general partner interest and, until November 23, 2021, MMGP held certain incentive distribution rights ("IDRs") in the Partnership. IDRs are a separate class of non-voting limited partner interest that may be transferred or sold by the general partner under the terms of the Partnership Agreement, and represent the right to receive an increasing percentage of cash distributions after the minimum quarterly distribution and any cumulative arrearages on common units once certain target distribution levels have been achieved. On November 23, 2021, MMGP contributed to the Partnership all of the outstanding IDRs for no consideration, whereupon the IDRs were cancelled and cease to exist (the “IDR Elimination”). Until the IDR Elimination, the Partnership was required to distribute all of its available cash from operating surplus, as previously defined in the Partnership Agreement. The general partner was allocated no incentive distributions during the six months ended June 30, 2022 and 2021. Distributions of Available Cash The Partnership distributes all of its available cash (as defined in the Partnership Agreement) within 45 days after the end of each quarter to unitholders of record and to the general partner. Available cash is generally defined as all cash and cash equivalents of the Partnership on hand at the end of each quarter less the amount of cash reserves its general partner determines in its reasonable discretion is necessary or appropriate to: (i) provide for the proper conduct of the Partnership’s business; (ii) comply with applicable law, any debt instruments or other agreements; or (iii) provide funds for distributions to unitholders and the general partner for any one or more of the next four quarters, plus all cash on the date of determination of available cash for the quarter resulting from working capital borrowings made after the end of the quarter. Net Income per Unit The Partnership follows the provisions of the FASB ASC 260-10 related to earnings per share, which addresses the application of the two-class method in determining income per unit for master limited partnerships having multiple classes of securities that may participate in partnership distributions accounted for as equity distributions. Undistributed earnings are allocated to the general partner and limited partners utilizing the contractual terms of the Partnership Agreement. When current period distributions are in excess of earnings, the excess distributions for the period are to be allocated to the general partner and limited partners based on their respective sharing of income and losses specified in the Partnership Agreement. Additionally, as required under FASB ASC 260-10-45-61A, unvested share-based payments that entitle employees to receive non-forfeitable distributions are considered participating securities, as defined in FASB ASC 260-10-20, for earnings per unit calculations. For purposes of computing diluted net income per unit, the Partnership uses the more dilutive of the two-class and if-converted methods. Under the if-converted method, the weighted-average number of subordinated units outstanding for the period is added to the weighted-average number of common units outstanding for purposes of computing basic net income per unit and the resulting amount is compared to the diluted net income per unit computed using the two-class method. The following is a reconciliation of net income allocated to the general partner and limited partners for purposes of calculating net income attributable to limited partners per unit: Three Months Ended June 30, Six Months Ended June 30, 2022 2021 2022 2021 Net income $ 6,606 $ (6,612) $ 18,084 $ (4,101) Less general partner’s interest in net income: Distributions payable on behalf of general partner interest 4 4 8 8 General partner interest in undistributed earnings 128 (136) 354 (90) Less income allocable to unvested restricted units 21 (20) 51 (10) Limited partners’ interest in net income $ 6,453 $ (6,460) $ 17,671 $ (4,009) The following are the unit amounts used to compute the basic and diluted earnings per limited partner unit for the periods presented: Three Months Ended June 30, Six Months Ended June 30, 2022 2021 2022 2021 Basic weighted average limited partner units outstanding 38,729,118 38,687,874 38,725,701 38,690,228 Dilutive effect of restricted units issued 21,035 — 27,496 — Total weighted average limited partner diluted units outstanding 38,750,153 38,687,874 38,753,197 38,690,228

Unit Based Awards - Long Term I

Unit Based Awards - Long Term Incentive Plans	6 Months Ended
	Jun. 30, 2022
Share-Based Payment Arrangement [Abstract]
Unit Based Awards - Long Term Incentive Plans	UNIT BASED AWARDS - LONG-TERM INCENTIVE PLANS The Partnership recognizes compensation cost related to unit-based awards to both employees and non-employees in its consolidated and condensed financial statements in accordance with certain provisions of ASC 718. Amounts recognized in operating expense and selling, general, and administrative expense in the consolidated and condensed financial statements with respect to these plans are as follows: Three Months Ended June 30, Six Months Ended June 30, 2022 2021 2022 2021 Restricted unit Awards Employees $ — $ — $ — $ 194 Non-employee directors 45 48 79 94 Phantom unit Awards Employees 1,077 — 1,981 — Non-employee directors — — — — Total unit-based compensation expense $ 1,122 $ 48 $ 2,060 $ 288 Long-Term Incentive Plans The Partnership's general partner has long-term incentive plans for employees and directors of the general partner and its affiliates who perform services for the Partnership. Phantom Unit Plan On July 21, 2021, the board of directors of the general partner of the Partnership and the compensation committee of the general partner's board of directors (the "Compensation Committee") approved the Martin Midstream Partners L.P. 2021 Phantom Unit Plan (the “Plan”), effective as of the same date. The Plan permits the awards of phantom units and phantom unit appreciation rights (collectively, "phantom unit awards") to any employee or non-employee director of the Partnership, including its executive officers. The awards may be time-based or performance-based and will be paid, if at all, in cash. The award of a phantom unit entitles the participant to a cash payment equal to the value of the phantom unit on the vesting date or dates, which value is the fair market value of a common unit of the Partnership (a “Unit”) on such vesting date or dates. The award of a phantom unit appreciation right entitles the recipient to a cash payment equal to the difference between the value of a phantom unit on the vesting date or dates in excess of the value assigned by the Compensation Committee to the phantom unit as of the grant date. Phantom units and phantom unit appreciation rights granted to participants do not confer upon participants any right to a Unit. On July 21, 2021, the Compensation Committee approved forms of time-based award agreements for phantom units and phantom unit appreciation rights, both of which awards vest in full on the third anniversary of the grant date. The grant date value of a phantom unit under a phantom unit appreciation right award is equal to the average of the closing price for a Unit during the 20 trading days immediately preceding the grant date of the award. Generally, vesting of an award is subject to a participant remaining continuously employed with the Partnership through the vesting date. However, if prior to the vesting date (i) a participant is terminated without cause (as defined in the award agreement) or terminates employment after the participant has attained both the age of 65 and ten years of employment (“retirement-eligible”), a prorated portion of the award will vest and be paid in cash no later than the 30 th day following such termination date (subject to a six-month delay in payment for certain retirement-eligible participants) or (ii) there is a change in control of the Partnership (as defined in the Plan), the award will vest in full and be paid in cash no later than the 30 th day following the date of the change of control; provided, that the participant has been in continuous employment through the termination or change in control date, as applicable. On July 21, 2021, 620,000 phantom units and 1,245,000 phantom unit appreciation rights were granted to employees of the general partner and its affiliates who perform services for the Partnership. On April 20, 2022, the board of directors of the general partner of the Partnership and the Compensation Committee approved the First Amendment to the Plan, effective as of the same date, which amendment increased the total number of phantom units available for grant under the Plan from 2,000,000 units to 5,000,000 units. On April 20, 2022, 365,000 phantom units and 1,097,500 phantom unit appreciation rights were granted to employees of the general partner and its affiliates who perform services for the Partnership. Phantom unit awards are recorded in operating expense and selling, general and administrative expense based on the fair value of the vested portion of the awards on the balance sheet date. The fair value of these awards is updated at each balance sheet date and changes in the fair value of the vested portions of the awards are recorded as increases or decreases to compensation expense within operating expense and selling, general and administrative expense in the Consolidated and Condensed Statements of Operations. All of the Partnership's outstanding phantom unit awards at June 30, 2022 met the criteria to be treated under liability classification in accordance with ASC 718, given that these awards will settle in cash on the vesting date. Compensation expense for the phantom awards is based on the fair value of the units as of the balance sheet date as further discussed below, and such costs are recognized ratably over the service period of the awards. As the fair value of liability awards is required to be re-measured each period end, stock compensation expense amounts recognized in future periods for these awards will vary. The estimated future cash payments of these awards are presented as liabilities within "Other current liabilities" and "Other long-term obligations" in the Consolidated and Condensed Balance Sheets. As of June 30, 2022, there was a total of $9,309 of unrecognized compensation costs related to non-vested phantom unit awards. These costs are expected to be recognized over a remaining life of 2.57 years. The fair value of the phantom unit awards was estimated using a Monte Carlo valuation model as of the balance sheet date. The Monte Carlo valuation model is based on random projections of stock price paths and must be repeated numerous times to achieve a probabilistic assessment. Expected volatility was calculated based on the historical volatility of the Partnership’s common units as well as set of peer companies. Restricted Unit Plan On May 26, 2017, the unitholders of the Partnership approved the Martin Midstream Partners L.P. 2017 Restricted Unit Plan (the "2017 LTIP"). The 2017 LTIP currently permits the grant of awards covering an aggregate of 3,000,000 common units, all of which can be awarded in the form of restricted units. The 2017 LTIP is administered by the Compensation Committee. A restricted unit is a unit that is granted to grantees with certain vesting restrictions, which may be time-based and/or performance-based. Once these restrictions lapse, the grantee is entitled to full ownership of the unit without restrictions. The Compensation Committee may determine to make grants under the 2017 LTIP containing such terms as the Compensation Committee shall determine under the 2017 LTIP. With respect to time-based restricted units ("TBRUs"), the Compensation Committee will determine the time period over which restricted units granted to employees and directors will vest. The Compensation Committee may also award a percentage of restricted units with vesting requirements based upon the achievement of specified pre-established performance targets ("Performance Based Restricted Units" or "PBRUs"). The performance targets may include, but are not limited to, the following: revenue and income measures, cash flow measures, net income before interest expense and income tax expense ("EBIT"), net income before interest expense, income tax expense, and depreciation and amortization ("EBITDA"), distribution coverage metrics, expense measures, liquidity measures, market measures, corporate sustainability metrics, and other measures related to acquisitions, dispositions, operational objectives and succession planning objectives. PBRUs are earned only upon our achievement of an objective performance measure for the performance period. PBRUs which vest are payable in common units. Unvested units granted under the 2017 LTIP may or may not participate in cash distributions depending on the terms of each individual award agreement. The performance conditions related to the PBRUs awarded on March 1, 2018 were not achieved and the Partnership treated these units as forfeited at expiration on March 31, 2021. As such, the Partnership did not recognize compensation expense related to these units. The restricted units issued to directors generally vest in equal annual installments over a four-year period. Restricted units issued to employees generally vest in equal annual installments over three years of service. All of the Partnership's outstanding restricted unit awards at June 30, 2022 met the criteria to be treated under equity classification. In February 2022, the Partnership issued 11,400 TBRUs to each of the Partnership's three independent directors under the 2017 LTIP. These restricted common units vest in equal installments of 3,800 units on January 24, 2023, 2024, 2025, and 2026. In April 2022, the Partnership issued 13,800 TBRUs to each of the Partnership's three independent directors under the 2017 LTIP. These restricted common units vest in equal installments of 4,600 units on January 24, 2023, 2024, 2025, and 2026. The restricted units are valued at their fair value at the date of grant, which is equal to the market value of common units on such date. A summary of the restricted unit activity for the six months ended June 30, 2022 is provided below: Number of Units Weighted Average Grant-Date Fair Value Per Unit Non-vested, beginning of period 114,876 $ 3.65 Granted (TBRU) 48,000 $ 2.22 Vested (38,514) $ 4.76 Forfeited — $ — Non-Vested, end of period 124,362 $ 2.75 Aggregate intrinsic value, end of period $ 495 A summary of the restricted units’ aggregate intrinsic value (market value at vesting date) and fair value of units vested (market value at date of grant) during the three and six months ended June 30, 2022 and 2021 is provided below: Three Months Ended June 30, Six Months Ended June 30, 2022 2021 2022 2021 Aggregate intrinsic value of units vested $ — $ — $ 92 $ 257 Fair value of units vested — — 188 1,418 As of June 30, 2022, there was $275 of unrecognized compensation cost related to non-vested restricted units. That cost is expected to be recognized over a weighted-average period of 2.39 years.

Related Party Transactions

Related Party Transactions	6 Months Ended
	Jun. 30, 2022
Related Party Transactions [Abstract]
Related Party Transactions	RELATED PARTY TRANSACTIONS As of June 30, 2022, Martin Resource Management Corporation owns 6,114,532 of the Partnership’s common units representing approximately 15.7% of the Partnership’s outstanding limited partner units. Martin Resource Management Corporation controls the Partnership's general partner by virtue of its 100% voting interest in MMGP Holdings, LLC ("Holdings"), the sole member of the Partnership's general partner. The Partnership’s general partner, MMGP, owns a 2% general partner interest in the Partnership. The Partnership’s general partner’s ability, as general partner, to manage and operate the Partnership, and Martin Resource Management Corporation’s ownership as of June 30, 2022 of approximately 15.7% of the Partnership’s outstanding limited partnership units, effectively gives Martin Resource Management Corporation the ability to veto some of the Partnership’s actions and to control the Partnership’s management. The following is a description of the Partnership’s material related party agreements and transactions: Omnibus Agreement Omnibus Agreement . The Partnership and its general partner are parties to the Omnibus Agreement dated November 1, 2002, with Martin Resource Management Corporation that governs, among other things, potential competition and indemnification obligations among the parties to the agreement, related party transactions, the provision of general administration and support services by Martin Resource Management Corporation and the Partnership’s use of certain Martin Resource Management Corporation trade names and trademarks. The Omnibus Agreement was amended on November 25, 2009, to include processing crude oil into finished products including naphthenic lubricants, distillates, asphalt and other intermediate cuts. The Omnibus Agreement was amended further on October 1, 2012, to permit the Partnership to provide certain lubricant packaging products and services to Martin Resource Management Corporation. Non-Competition Provisions . Martin Resource Management Corporation has agreed for so long as it controls the general partner of the Partnership, not to engage in the business of: • providing terminalling and storage services for petroleum products and by-products including the refining, blending and packaging of finished lubricants; • providing land and marine transportation of petroleum products, by-products, and chemicals; • distributing NGLs; and • manufacturing and selling sulfur-based fertilizer products and other sulfur-related products. This restriction does not apply to: • the ownership and/or operation on the Partnership’s behalf of any asset or group of assets owned by it or its affiliates; • any business operated by Martin Resource Management Corporation, including the following: ◦ distributing asphalt, marine fuel and other liquids; ◦ providing shore-based marine services in Texas, Louisiana, Mississippi, and Alabama; ◦ operating a crude oil gathering business in Stephens, Arkansas; ◦ providing crude oil gathering and marketing services of base oils, asphalt, and distillate products in Smackover, Arkansas; ◦ providing crude oil marketing and transportation from the well head to the end market; ◦ operating an environmental consulting company; ◦ supplying employees and services for the operation of the Partnership's business; and ◦ operating, solely for our account, the asphalt facilities in each of Hondo, South Houston and Port Neches, Texas and Omaha, Nebraska. • any business that Martin Resource Management Corporation acquires or constructs that has a fair market value of less than $5,000; • any business that Martin Resource Management Corporation acquires or constructs that has a fair market value of $5,000 or more if the Partnership has been offered the opportunity to purchase the business for fair market value and the Partnership declines to do so with the concurrence of the conflicts committee of the board of directors of the general partner of the Partnership (the "Conflicts Committee"); and • any business that Martin Resource Management Corporation acquires or constructs where a portion of such business includes a restricted business and the fair market value of the restricted business is $5,000 or more and represents less than 20% of the aggregate value of the entire business to be acquired or constructed; provided that, following completion of the acquisition or construction, the Partnership will be provided the opportunity to purchase the restricted business. Services. Under the Omnibus Agreement, Martin Resource Management Corporation provides the Partnership with corporate staff, support services, and administrative services necessary to operate the Partnership’s business. The Omnibus Agreement requires the Partnership to reimburse Martin Resource Management Corporation for all direct expenses it incurs or payments it makes on the Partnership’s behalf or in connection with the operation of the Partnership’s business. There is no monetary limitation on the amount the Partnership is required to reimburse Martin Resource Management Corporation for direct expenses. In addition to the direct expenses, under the Omnibus Agreement, the Partnership is required to reimburse Martin Resource Management Corporation for indirect general and administrative and corporate overhead expenses. Effective January 1, 2022, through December 31, 2022, the Conflicts Committee approved an annual reimbursement amount for indirect expenses of $13,491. The Partnership reimbursed Martin Resource Management Corporation for $3,373 and $3,652 of indirect expenses for the three months ended June 30, 2022 and 2021, respectively. The Partnership reimbursed Martin Resource Management Corporation for $6,746 and $7,193 of indirect expenses for the six months ended June 30, 2022 and 2021, respectively. The Conflicts Committee will review and approve future adjustments in the reimbursement amount for indirect expenses, if any, annually. These indirect expenses are intended to cover the centralized corporate functions Martin Resource Management Corporation provides to the Partnership, such as accounting, treasury, clerical, engineering, legal, billing, information technology, administration of insurance, general office expenses and employee benefit plans and other general corporate overhead functions the Partnership shares with Martin Resource Management Corporation retained businesses. The provisions of the Omnibus Agreement regarding Martin Resource Management Corporation’s services will terminate if Martin Resource Management Corporation ceases to control the general partner of the Partnership. Related Party Transactions . The Omnibus Agreement prohibits the Partnership from entering into any material agreement with Martin Resource Management Corporation without the prior approval of the Conflicts Committee. For purposes of the Omnibus Agreement, the term "material agreements" means any agreement between the Partnership and Martin Resource Management Corporation that requires aggregate annual payments in excess of the then-applicable agreed upon reimbursable amount of indirect general and administrative expenses. Please read "Services" above. License Provisions. Under the Omnibus Agreement, Martin Resource Management Corporation has granted the Partnership a nontransferable, nonexclusive, royalty-free right and license to use certain of its trade names and marks, as well as the trade names and marks used by some of its affiliates. Amendment and Termination. The Omnibus Agreement may be amended by written agreement of the parties; provided, however, that it may not be amended without the approval of the Conflicts Committee if such amendment would adversely affect the unitholders. The Omnibus Agreement was first amended on November 25, 2009, to permit the Partnership to provide refining services to Martin Resource Management Corporation. The Omnibus Agreement was amended further on October 1, 2012, to permit the Partnership to provide certain lubricant packaging products and services to Martin Resource Management Corporation. Such amendments were approved by the Conflicts Committee. The Omnibus Agreement, other than the indemnification provisions and the provisions limiting the amount for which the Partnership will reimburse Martin Resource Management Corporation for general and administrative services performed on its behalf, will terminate if the Partnership is no longer an affiliate of Martin Resource Management Corporation. Master Transportation Services Agreement Master Transportation Agreement. Martin Transport, Inc. ("MTI"), a wholly owned subsidiary of the Partnership, is a party to a master transportation services agreement effective January 1, 2019, with certain wholly owned subsidiaries of Martin Resource Management Corporation. Under the agreement, MTI agreed to transport Martin Resource Management Corporation's petroleum products and by-products. Term and Pricing. The agreement will continue unless either party terminates the agreement by giving at least 30 days' written notice to the other party. The rates under the agreement are subject to any adjustments which are mutually agreed upon or in accordance with a price index. Additionally, shipping charges are also subject to fuel surcharges determined on a weekly basis in accordance with the U.S. Department of Energy’s national diesel price list. Indemnification. MTI has agreed to indemnify Martin Resource Management Corporation against all claims arising out of the negligence or willful misconduct of MTI and its officers, employees, agents, representatives and subcontractors. Martin Resource Management Corporation has agreed to indemnify MTI against all claims arising out of the negligence or willful misconduct of Martin Resource Management Corporation and its officers, employees, agents, representatives and subcontractors. In the event a claim is the result of the joint negligence or misconduct of MTI and Martin Resource Management Corporation, indemnification obligations will be shared in proportion to each party’s allocable share of such joint negligence or misconduct. Marine Agreements Marine Transportation Agreement. The Partnership is a party to a marine transportation agreement effective January 1, 2006, as amended, under which the Partnership provides marine transportation services to Martin Resource Management Corporation on a spot-contract basis at applicable market rates. Effective each January 1, this agreement automatically renews for consecutive one year periods unless either party terminates the agreement by giving written notice to the other party at least 60 days prior to the expiration of the then applicable term. The fees the Partnership charges Martin Resource Management Corporation are based on applicable market rates. Marine Fuel. The Partnership is a party to an agreement with Martin Resource Management Corporation dated November 1, 2002, under which Martin Resource Management Corporation provides the Partnership with marine fuel from its locations in the Gulf of Mexico at a fixed rate in excess of the Platt’s U.S. Gulf Coast Index for #2 Fuel Oil. Under this agreement, the Partnership agreed to purchase all of its marine fuel requirements that occur in the areas serviced by Martin Resource Management Corporation. Terminal Services Agreements Diesel Fuel Terminal Services Agreement. Effective January 1, 2016, the Partnership entered into a second amended and restated terminalling services agreement under which the Partnership provides terminal services to Martin Resource Management Corporation for marine fuel distribution. At such time, the per-gallon throughput fee the Partnership charged under this agreement was increased when compared to the previous agreement and may be adjusted annually based on a price index. This agreement was further amended on April 1, 2019 and January 1, 2020 to modify its minimum throughput requirements and throughput fees. The term of this agreement is currently evergreen and it will continue on a month to month basis until terminated by either party by giving 60 days’ written notice. Miscellaneous Terminal Services Agreements. The Partnership is currently party to several terminal services agreements and from time to time the Partnership may enter into other terminal service agreements for the purpose of providing terminal services to related parties. Individually, each of these agreements is immaterial but when considered in the aggregate they could be deemed material. These agreements are throughput based with a minimum volume commitment. Generally, the fees due under these agreements are adjusted annually based on a price index. Other Agreements Cross Tolling Agreement. The Partnership is a party to an amended and restated tolling agreement with Cross Oil Refining and Marketing, Inc. ("Cross") dated October 28, 2014, under which the Partnership processes crude oil into finished products, including naphthenic lubricants, distillates, asphalt and other intermediate cuts for Cross. The tolling agreement expires November 25, 2031. Under this tolling agreement, Cross agreed to process a minimum of 6,500 barrels per day of crude oil at the facility at a fixed price per barrel. Any additional barrels are processed at a modified price per barrel. In addition, Cross agreed to pay a monthly reservation fee and a periodic fuel surcharge fee based on certain parameters specified in the tolling agreement. Further, certain capital improvements, to the extent requested by Cross, are reimbursed through a capital recovery fee. As of December 31, 2019, the annual capital recovery fee reimbursement of $2,088 expired. An additional $2,586 of capital recovery fee reimbursement expired on December 31, 2020. All of these fees (other than the fuel surcharge and capital recovery fee) are subject to escalation annually based upon the greater of 3% or the increase in the Consumer Price Index for a specified annual perio d . A lso, the Partnership renegotiated a crude transportation contract set to expire in the first half of 2022, resulting in a reduction in revenue of $2,145 annually beginning January 1, 2020. East Texas Mack Leases. MTI leases equipment, including tractors and trailers, from East Texas Mack Sales ("East Texas Mack"). Certain of our directors or officers are owners of East Texas Mack, including entities affiliated with Ruben Martin, who owns approximately 46% of the issued and outstanding stock of East Texas Mack. Amounts paid to East Texas Mack for tractor and trailer lease payments and lease residuals for the three months ended June 30, 2022 and 2021 were $453 and $282, respectively. Amounts paid to East Texas Mack for tractor and trailer lease payments and lease residuals for the six months ended June 30, 2022 and 2021 were $763 and $518, respectively. Other Miscellaneous Agreements. From time to time the Partnership enters into other miscellaneous agreements with Martin Resource Management Corporation for the provision of other services or the purchase of other goods. The tables below summarize the related party transactions that are included in the related financial statement captions on the face of the Partnership’s Consolidated and Condensed Statements of Operations. The revenues, costs and expenses reflected in these tables are tabulations of the related party transactions that are recorded in the corresponding captions of the consolidated and condensed financial statements and do not reflect a statement of profits and losses for related party transactions. The impact of related party revenues from sales of products and services is reflected in the consolidated and condensed financial statements as follows: Three Months Ended June 30, Six Months Ended June 30, 2022 2021 2022 2021 Revenues: Terminalling and storage $ 17,416 $ 15,569 $ 33,620 $ 30,875 Transportation 7,463 4,889 13,751 8,899 Product sales: Sulfur services 40 29 69 59 Terminalling and storage 55 42 344 126 95 71 416 185 $ 24,974 $ 20,529 $ 47,787 $ 39,959 The impact of related party cost of products sold is reflected in the consolidated and condensed financial statements as follows: Three Months Ended June 30, Six Months Ended June 30, 2022 2021 2022 2021 Cost of products sold: Sulfur services $ 2,592 $ 2,403 $ 5,268 $ 4,938 Terminalling and storage 10,209 7,036 19,860 11,604 $ 12,801 $ 9,439 $ 25,128 $ 16,542 The impact of related party operating expenses is reflected in the consolidated and condensed financial statements as follows: Three Months Ended June 30, Six Months Ended June 30, 2022 2021 2022 2021 Operating expenses: Transportation $ 16,471 $ 13,644 $ 31,734 $ 26,703 Natural gas liquids 518 513 1,028 977 Sulfur services 1,789 1,306 3,034 2,049 Terminalling and storage 4,668 4,127 9,030 8,229 $ 23,446 $ 19,590 $ 44,826 $ 37,958 The impact of related party selling, general and administrative expenses is reflected in the consolidated and condensed financial statements as follows: Three Months Ended June 30, Six Months Ended June 30, 2022 2021 2022 2021 Selling, general and administrative: Transportation $ 1,838 $ 1,701 $ 3,803 $ 3,371 Natural gas liquids 196 276 1,535 2,084 Sulfur services 999 736 1,995 1,507 Terminalling and storage 967 832 2,025 1,652 Indirect, including overhead allocation 3,498 3,740 6,948 7,351 $ 7,498 $ 7,285 $ 16,306 $ 15,965

Business Segments

Business Segments	6 Months Ended
	Jun. 30, 2022
Segment Reporting [Abstract]
Business Segments	BUSINESS SEGMENTS The Partnership has four reportable segments: (1) terminalling and storage, (2) transportation, (3) sulfur services and (4) natural gas liquids. The Partnership’s reportable segments are strategic business units that offer different products and services. The operating income of these segments is reviewed by the chief operating decision maker to assess performance and make business decisions. The accounting policies of the operating segments are the same as those described in Note 2 in the Partnership’s Annual Report on Form 10-K for the year ended December 31, 2021, filed with the SEC on March 1, 2022. The Partnership evaluates the performance of its reportable segments based on operating income. There is no allocation of interest expense. Three Months Ended June 30, 2022 Operating Revenues Intersegment Revenues Eliminations Operating Revenues after Eliminations Depreciation and Amortization Operating Income (Loss) after Eliminations Capital Expenditures and Plant Turnaround Costs Terminalling and storage 58,410 (1,779) 56,631 7,731 4,068 2,501 Transportation 60,902 (5,070) 55,832 3,590 6,155 933 Sulfur services 56,953 — 56,953 2,882 12,000 1,131 Natural gas liquids 97,580 — 97,580 597 3,657 210 Indirect selling, general and administrative — — — — (4,390) — Total $ 273,845 $ (6,849) $ 266,996 $ 14,800 $ 21,490 $ 4,775 Three Months Ended June 30, 2021 Operating Revenues Intersegment Revenues Eliminations Operating Revenues after Eliminations Depreciation and Amortization Operating Income (Loss) after Eliminations Capital Expenditures and Plant Turnaround Costs Terminalling and storage 45,524 (1,675) 43,849 6,996 2,576 1,507 Transportation 38,349 (3,423) 34,926 4,331 (2,709) 1,091 Sulfur services 38,286 — 38,286 2,568 8,249 799 Natural gas liquids 67,232 — 67,232 588 3,297 140 Indirect selling, general and administrative — — — — (3,780) — Total $ 189,391 $ (5,098) $ 184,293 $ 14,483 $ 7,633 $ 3,537 Six Months Ended June 30, 2022 Operating Revenues Intersegment Revenues Eliminations Operating Revenues after Eliminations Depreciation and Amortization Operating Income (Loss) after Eliminations Capital Expenditures and Plant Turnaround Costs Terminalling and storage $ 112,793 $ (3,357) $ 109,436 $ 15,337 $ 6,935 $ 6,445 Transportation 112,799 (10,257) 102,542 7,163 7,943 4,514 Sulfur services 116,076 — 116,076 5,591 26,837 3,094 Natural gas liquids 218,146 (3) 218,143 1,195 13,736 657 Indirect selling, general and administrative — — — — (8,512) — Total $ 559,814 $ (13,617) $ 546,197 $ 29,286 $ 46,939 $ 14,710 Six Months Ended June 30, 2021 Operating Revenues Intersegment Revenues Eliminations Operating Revenues after Eliminations Depreciation and Amortization Operating Income (Loss) after Eliminations Capital Expenditures and Plant Turnaround Costs Terminalling and storage $ 85,358 $ (3,270) $ 82,088 $ 14,101 $ 4,884 $ 4,172 Transportation 72,318 (7,577) 64,741 8,329 (8,212) 1,616 Sulfur services 73,121 — 73,121 5,288 16,602 3,863 Natural gas liquids 165,317 — 165,317 1,199 17,744 461 Indirect selling, general and administrative — — — — (7,699) — Total $ 396,114 $ (10,847) $ 385,267 $ 28,917 $ 23,319 $ 10,112 The Partnership's assets by reportable segment as of June 30, 2022 and December 31, 2021, are as follows: June 30, 2022 December 31, 2021 Total assets: Terminalling and storage $ 244,362 $ 248,194 Transportation 155,382 145,177 Sulfur services 115,409 108,007 Natural gas liquids 121,008 78,483 Total assets $ 636,161 $ 579,861

Commitments and Contingencies

Commitments and Contingencies	6 Months Ended
	Jun. 30, 2022
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	COMMITMENTS AND CONTINGENCIES Contingencies From time to time, the Partnership is subject to various claims and legal actions arising in the ordinary course of business. In the opinion of management, the ultimate disposition of these matters will not have a material adverse effect on the Partnership. On December 31, 2015, the Partnership received a demand from a customer in its lubricants packaging business for defense and indemnity in connection with various lawsuits filed against it, which generally alleged that the customer engaged in unlawful and deceptive business practices in connection with its marketing and advertising of its private label motor oil (the “Marketing Lawsuits”). The Partnership disputed and continues to dispute that it has any obligation to defend or indemnify the customer for the customer’s conduct. Accordingly, on January 7, 2016, the Partnership filed a Complaint for Declaratory

Fair Value Measurements

Fair Value Measurements	6 Months Ended
	Jun. 30, 2022
Fair Value Disclosures [Abstract]
Fair Value Measurements	FAIR VALUE MEASUREMENTS The Partnership uses a valuation framework based upon inputs that market participants use in pricing certain assets and liabilities. These inputs are classified into two categories: observable inputs and unobservable inputs. Observable inputs represent market data obtained from independent sources. Unobservable inputs represent the Partnership's own market assumptions. Unobservable inputs are used only if observable inputs are unavailable or not reasonably available without undue cost and effort. The two types of inputs are further prioritized into the following hierarchy: Level 1: Quoted market prices in active markets for identical assets or liabilities. Level 2: Observable market-based inputs or unobservable inputs that are corroborated by market data. Level 3: Unobservable inputs that reflect the entity's own assumptions and are not corroborated by market data. Assets and liabilities measured at fair value on a recurring basis are summarized below: Level 2 June 30, 2022 December 31, 2021 Commodity derivative contracts, net $ — $ — The Partnership is required to disclose estimated fair values for its financial instruments. Fair value estimates are set forth below for these financial instruments. The following methods and assumptions were used to estimate the fair value of each class of financial instrument: • Accounts and other receivables, trade and other accounts payable, accrued interest payable, other accrued liabilities, income taxes payable and due from/to affiliates: The carrying amounts approximate fair value due to the short maturity and highly liquid nature of these instruments, and as such these have been excluded from the table below. There is negligible credit risk associated with these instruments. • Current and non-current portion of long-term debt: The carrying amount of the credit facility approximates fair value due to the debt having a variable interest rate and is in Level 2. The estimated fair value of the 2024 Notes and 2025 Notes (collectively, the "senior notes") is considered Level 2, as the fair value is based upon quoted prices for identical liabilities in markets that are not active. June 30, 2022 December 31, 2021 Carrying Fair Carrying Fair 2024 Notes $ 51,890 $ 53,975 $ 51,317 $ 55,220 2025 Notes $ 290,286 $ 290,113 $ 290,667 $ 307,146 Total $ 342,176 $ 344,088 $ 341,984 $ 362,366

Condensed Consolidated Financia

Condensed Consolidated Financial Information	6 Months Ended
	Jun. 30, 2022
Consolidating Financial Statements [Abstract]
Condensed Consolidated Financial Information	CONDENSED CONSOLIDATED FINANCIAL INFORMATION    The Partnership's operations are conducted by its operating subsidiaries as it has no independent assets or operations. Martin Operating Partnership L.P. (the "Operating Partnership"), the Partnership’s wholly-owned subsidiary, and the Partnership's other operating subsidiaries have issued in the past, and may issue in the future, unconditional guarantees of senior or subordinated debt securities of the Partnership. The guarantees that have been issued are full, irrevocable and unconditional and joint and several. In addition, the Operating Partnership may also issue senior or subordinated debt securities which, if issued, will be fully, irrevocably and unconditionally guaranteed by the Partnership. Substantially all of the Partnership's operating subsidiaries are subsidiary guarantors of its Senior Notes and any subsidiaries other than the subsidiary guarantors are minor.

Income Taxes

Income Taxes	6 Months Ended
	Jun. 30, 2022
Income Tax Disclosure [Abstract]
Income Taxes	INCOME TAXES Three Months Ended June 30, Six Months Ended June 30, 2022 2021 2022 2021 Provision for income taxes $ 2,037 $ 935 $ 3,578 $ 1,157 The operations of a partnership are generally not subject to income taxes, except for Texas margin tax, because its income is taxed directly to its partners. Current state income taxes attributable to the Texas margin tax relating to the operation of the Partnership of $80 and $61 were recorded in income tax expense for the three months ended June 30, 2022 and 2021, respectively. Current state income taxes attributable to the Texas margin tax relating to the operation of the Partnership of $256 and $180 were recorded in income tax expense for the six months ended June 30, 2022 and 2021, respectively. Deferred taxes applicable to the Texas margin tax relating to the operation of the Partnership are immaterial. MTI, a wholly owned subsidiary of the Partnership, is subject to income taxes due to its corporate structure (the "Taxable Subsidiary"). Total income tax expense of $1,957 and $874, related to the operation of the Taxable Subsidiary, for the three months ended June 30, 2022 and 2021, resulted in an effective income tax rate ("ETR") of 21.58% and 40.22%, respectively. Total income tax expense of $3,322 and $977, related to the operation of the Taxable Subsidiary, for the six months ended June 30, 2022 and 2021, resulted in an effective income tax rate ETR of 21.77% and 38.73%, respectively. The decrease in the ETR for the income taxes during the three and six months ended June 30, 2022 was primarily due to significantly larger pretax income recorded for both the three and six months ended June 30, 2022, compared to the same periods in 2021. The increase in the provision for income taxes for both the three and six months ended June 30, 2022, compared to the same periods in 2021, was primarily due to an increase in income before income taxes in the current period. A current federal income tax expense of $404 and $108, related to the operation of the Taxable Subsidiary, was recorded for the three months ended June 30, 2022 and 2021, respectively. A current federal income tax expense of $723 and $123, related to the operation of the Taxable Subsidiary, was recorded for the six months ended June 30, 2022 and 2021, respectively. A current state income tax expense of $170 and $83, related to the operation of the Taxable Subsidiary, was recorded for the three months ended June 30, 2022 and 2021, respectively.A current state income tax expense of $295 and $96, related to the operation of the Taxable Subsidiary, was recorded for the six months ended June 30, 2022 and 2021, respectively. With respect to MTI, income taxes are accounted for under the asset and liability method pursuant to the provisions of ASC 740 related to income taxes. Deferred tax assets and liabilities are recognized for the future tax consequences attributable to differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax basis. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income in the years in which those temporary differences are expected to be recovered or settled. The effect on deferred tax assets and liabilities of a change in tax rates is recognized in income in the period that includes the enactment date. A deferred tax expense related to the MTI temporary differences of $1,383 and $683 was recorded for the three months ended June 30, 2022 and 2021, respectively. A deferred tax expense related to the MTI temporary differences of $2,304 and $758 was recorded for the six months ended June 30, 2022 and 2021, respectively. A net deferred tax asset of $17,517 and $19,821, related to the cumulative book and tax temporary differences, existed at June 30, 2022 and December 31, 2021, respectively.

Subsequent Events

Subsequent Events	6 Months Ended
	Jun. 30, 2022
Subsequent Events [Abstract]
Subsequent Events	SUBSEQUENT EVENTSQuarterly Distribution. On July 20, 2022, the Partnership declared a quarterly cash distribution of $0.005 per common unit for the second quarter of 2022, or $0.020 per common unit on an annualized basis, which will be paid on August 12, 2022 to unitholders of record as of August 5, 2022.

New Accounting Pronouncements (

New Accounting Pronouncements (Policies)	6 Months Ended
	Jun. 30, 2022
Accounting Changes and Error Corrections [Abstract]
New Accounting Pronouncements	NEW ACCOUNTING PRONOUNCEMENTS On January 1, 2021, the Partnership adopted Financial Accounting Standards Board ("FASB") Accounting Standards Update ("ASU") 2019-12, Income Taxes (Accounting Standards Codification ("ASC") Topic 740): Simplifying the Accounting for Income Taxes , which removes certain exceptions to general principles in ASC 740 and clarifies and amends existing guidance within U.S. GAAP. Adoption of the new standard did not have a material impact on the Partnership’s consolidated financial statements.
Fair Value Measurements	The Partnership uses a valuation framework based upon inputs that market participants use in pricing certain assets and liabilities. These inputs are classified into two categories: observable inputs and unobservable inputs. Observable inputs represent market data obtained from independent sources. Unobservable inputs represent the Partnership's own market assumptions. Unobservable inputs are used only if observable inputs are unavailable or not reasonably available without undue cost and effort. The two types of inputs are further prioritized into the following hierarchy: Level 1: Quoted market prices in active markets for identical assets or liabilities. Level 2: Observable market-based inputs or unobservable inputs that are corroborated by market data. Level 3: Unobservable inputs that reflect the entity's own assumptions and are not corroborated by market data.
Fair Value of Financial Instruments	The Partnership is required to disclose estimated fair values for its financial instruments. Fair value estimates are set forth below for these financial instruments. The following methods and assumptions were used to estimate the fair value of each class of financial instrument: • Accounts and other receivables, trade and other accounts payable, accrued interest payable, other accrued liabilities, income taxes payable and due from/to affiliates: The carrying amounts approximate fair value due to the short maturity and highly liquid nature of these instruments, and as such these have been excluded from the table below. There is negligible credit risk associated with these instruments.

Revenue (Tables)

Revenue (Tables)	6 Months Ended
	Jun. 30, 2022
Revenue from Contract with Customer [Abstract]
Disaggregation of Revenue	The following table disaggregates our revenue by major source: Three Months Ended June 30, Six Months Ended June 30, 2022 2021 2022 2021 Terminalling and storage segment Lubricant product sales $ 36,192 $ 25,147 $ 69,584 $ 45,008 Throughput and storage 20,439 18,702 39,852 37,080 $ 56,631 $ 43,849 $ 109,436 $ 82,088 Natural gas liquids segment Natural gas liquids product sales $ 97,580 $ 67,232 $ 218,143 $ 165,317 $ 97,580 $ 67,232 $ 218,143 $ 165,317 Sulfur services segment Sulfur product sales $ 13,565 $ 7,386 $ 23,634 $ 14,454 Fertilizer product sales 40,304 27,951 86,274 52,768 Sulfur services 3,084 2,949 6,168 5,899 $ 56,953 $ 38,286 $ 116,076 $ 73,121 Transportation segment Land transportation $ 42,980 $ 27,486 $ 78,485 $ 50,442 Inland transportation 11,036 6,633 20,455 13,357 Offshore transportation 1,816 807 3,602 942 $ 55,832 $ 34,926 $ 102,542 $ 64,741
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction	The table below includes estimated minimum revenue expected to be recognized in the future related to performance obligations that are unsatisfied at the end of the reporting period. The Partnership applies the practical expedient in ASC 606-10-50-14(a) and does not disclose information about remaining performance obligations that have original expected durations of one year or less. 2022 2023 2024 2025 2026 Thereafter Total Terminalling and storage Throughput and storage $ 21,517 $ 42,247 $ 43,571 $ 44,878 $ 46,164 $ 252,476 $ 450,853 Natural Gas Services Natural Gas Liquids 2,814 5,391 5,405 5,391 3,131 — 22,132 Sulfur services Sulfur product sales 8,853 17,703 15,993 3,656 1,931 295 48,431 Total $ 33,184 $ 65,341 $ 64,969 $ 53,925 $ 51,226 $ 252,771 $ 521,416

Inventories (Tables)

Inventories (Tables)	6 Months Ended
	Jun. 30, 2022
Inventory Disclosure [Abstract]
Components of Inventories	Components of inventories at June 30, 2022 and December 31, 2021 were as follows: June 30, December 31, Natural gas liquids $ 67,614 $ 20,034 Sulfur 1,480 612 Fertilizer 21,009 13,005 Lubricants 23,262 23,876 Other 4,480 4,593 $ 117,845 $ 62,120

Debt (Tables)

Debt (Tables)	6 Months Ended
	Jun. 30, 2022
Debt Disclosure [Abstract]
Schedule of Long-Term Debt	At June 30, 2022 and December 31, 2021, long-term debt consisted of the following: June 30, December 31, $275,000 Credit facility at variable interest rate (5.00% 1 weighted average at June 30, 2022), due August 2023 secured by substantially all of the Partnership’s assets, including, without limitation, inventory, accounts receivable, vessels, equipment, fixed assets and the interests in the Partnership’s operating subsidiaries, net of unamortized debt issuance costs of $1,851 and $2,613, respectively 2 $ 147,149 $ 156,887 $53,750 Senior notes due February 2024, 10.0% interest, net of unamortized debt issuance costs of $1,860 and $2,433, respectively, secured 2,3 51,890 51,317 $291,381 Senior notes due February 2025, 11.5% interest, net of unamortized debt issuance costs of $1,095 and $1,303, respectively, secured 2,3,4 290,286 290,667 Total 489,325 498,871 Less: current portion — — Total long-term debt, net of current portion $ 489,325 $ 498,871 Current installments of finance lease obligations $ 169 $ 280 Finance lease obligations — 9 Total finance lease obligations $ 169 $ 289 1 Interest rate fluctuates based on LIBOR (set on the date of each advance) or the base prime rate plus an applicable margin. The margin is set every three months. All amounts outstanding at December 31, 2021 and June 30, 2022 were at LIBOR plus an applicable margin with LIBOR having a floor of 1.00% per annum. The applicable margin for revolving loans that are LIBOR loans currently ranges from 2.75% to 4.00%, and the applicable margin for revolving loans that are base prime rate loans currently ranges from 1.75% to 3.00%. The applicable margin for LIBOR borrowings at June 30, 2022 is 3.25%. The applicable margin for LIBOR borrowings effective July 20, 2022 is 3.00%. The credit facility contains various covenants that limit the Partnership’s ability to make distributions; make certain investments and acquisitions; enter into certain agreements; incur indebtedness; sell assets; and make certain amendments to the Partnership's omnibus agreement with Martin Resource Management Corporation (the "Omnibus Agreement"). The credit facility was amended on July 16, 2021 to, among other things, reduce the commitments thereunder from $300,000 to $275,000. 2 The Partnership was in compliance with all debt covenants as of June 30, 2022 and December 31, 2021, respectively. 3 The indentures for each of the outstanding series of senior notes restrict the Partnership’s ability to sell assets; pay distributions or repurchase units or redeem or repurchase subordinated debt; make investments; incur or guarantee additional indebtedness or issue preferred units; and consolidate, merge or transfer all or substantially all of its assets. 4 On April 14, 2022, the Partnership completed the payment of an aggregate principal amount of approximately $589, or approximately 0.20%, of its 11.50% Senior Secured Second Lien Notes due 2025 (the “2025 Notes”), pursuant to its cash tender offer (the “Excess Cash Flow Offer”) to purchase up to $9,305 aggregate principal amount of the 2025 Notes. The purchase price for the tendered 2025 Notes was 100% of the aggregate principal amount thereof, plus accrued and unpaid interest to, but not including, the purchase date.

Leases (Tables)

Leases (Tables)	6 Months Ended
	Jun. 30, 2022
Leases [Abstract]
Components of Lease Expense	The components of lease expense for the six months ended June 30, 2022 and 2021 were as follows: Three Months Ended June 30, Six Months Ended June 30, 2022 2022 2021 2022 2021 Operating lease cost $ 2,540 $ 2,199 $ 4,811 $ 4,501 Finance lease cost: Amortization of right-of-use assets $ 25 25 $ 50 115 Interest on lease liabilities $ 3 6 $ 7 16 Short-term lease cost $ 2,887 2,473 $ 5,505 5,581 Variable lease cost $ 41 $ 26 $ 84 $ 59 Total lease cost $ 5,496 $ 4,729 $ 10,457 $ 10,272
Schedule of Supplemental Balance Sheet Information	Supplemental balance sheet information related to leases at June 30, 2022 and December 31, 2021 was as follows: June 30, December 31, 2021 Operating Leases Operating lease right-of-use assets $ 30,249 $ 21,861 Current portion of operating lease liabilities included in "Other accrued liabilities" $ 8,207 $ 6,600 Operating lease liabilities $ 22,455 15,704 Total operating lease liabilities $ 30,662 $ 22,304 Finance Leases Property, plant and equipment, at cost $ 1,071 $ 1,071 Accumulated depreciation $ (413) (364) Property, plant and equipment, net $ 658 $ 707 Current installments of finance lease obligations $ 169 $ 280 Finance lease obligations $ — 9 Total finance lease obligations $ 169 $ 289
Schedule of Future Minimum Lease Obligations, Finance Lease	The Partnership’s future minimum lease obligations as of June 30, 2022 consist of the following: Operating Leases Finance Leases Year 1 $ 9,463 $ 172 Year 2 6,772 — Year 3 4,713 — Year 4 3,889 — Year 5 2,829 — Thereafter 7,954 — Total $ 35,620 $ 172 Less amounts representing interest costs (4,958) (3) Total lease liability $ 30,662 $ 169
Schedule of Future Minimum Lease Obligations, Operating Lease	The Partnership’s future minimum lease obligations as of June 30, 2022 consist of the following: Operating Leases Finance Leases Year 1 $ 9,463 $ 172 Year 2 6,772 — Year 3 4,713 — Year 4 3,889 — Year 5 2,829 — Thereafter 7,954 — Total $ 35,620 $ 172 Less amounts representing interest costs (4,958) (3) Total lease liability $ 30,662 $ 169

Supplemental Balance Sheet In_2

Supplemental Balance Sheet Information (Tables)	6 Months Ended
	Jun. 30, 2022
Balance Sheet Related Disclosures [Abstract]
Schedule of Other Accrued Liabilities	Components of "Other accrued liabilities" were as follows: June 30, December 31, 2021 Accrued interest $ 14,733 $ 15,135 Asset retirement obligations 412 261 Property and other taxes payable 3,627 4,631 Accrued payroll 3,802 2,973 Operating lease liabilities 8,207 6,600 Other 732 250 $ 31,513 $ 29,850
Schedule of Asset Retirement Obligations	The schedule below summarizes the changes in our asset retirement obligations: June 30, 2022 Asset retirement obligations as of December 31, 2021 $ 9,072 Additions to asset retirement obligations — Accretion expense 190 Liabilities settled (3,902) Ending asset retirement obligations 5,360 Current portion of asset retirement obligations 1 (412) Long-term portion of asset retirement obligations 2 $ 4,948 1 The current portion of asset retirement obligations is included in "Other accrued liabilities" on the Partnership's Consolidated and Condensed Balance Sheets. 2 The non-current portion of asset retirement obligations is included in "Other long-term obligations" on the Partnership's Consolidated and Condensed Balance Sheets.

Derivative Instruments and He_2

Derivative Instruments and Hedging Activities (Tables)	6 Months Ended
	Jun. 30, 2022
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Effect of Derivative Instruments on the Consolidated Balance Sheets	The following table summarizes the fair value and classification of the Partnership’s derivative instruments in its Consolidated and Condensed Balance Sheets: Derivative Assets Derivative Liabilities Fair Values Fair Values Balance Sheet Location June 30, 2022 December 31, 2021 Balance Sheet Location June 30, 2022 December 31, 2021 Derivatives designated as hedging instruments: Current: Commodity contracts Fair value of derivatives $ — $ — Fair value of derivatives $ — $ —
Summary of Gain (Loss) Recognized in AOCI and Reclassification From AOCI	The following table summarizes the gain (loss) recognized in AOCI at June 30, 2022 and December 31, 2021, respectively, and the gain (loss) reclassified from accumulated other comprehensive loss into earnings during the three months ended June 30, 2022 and 2021, respectively, for derivative financial instruments designated as cash flow hedges: Amount of Gain (Loss) Recognized in AOCI Location of Gain (Loss) Amount of Gain (Loss) Reclassified from AOCI into Income 2022 2021 2022 2021 Commodity contracts $ 167 $ 816 Cost of products sold $ (440) $ — Total $ 167 $ 816 $ (440) $ — The following table summarizes the gain (loss) recognized in AOCI at June 30, 2022 and December 31, 2021, respectively, and the gain (loss) reclassified from accumulated other comprehensive loss into earnings during the six months ended June 30, 2022 and 2021, respectively, for derivative financial instruments designated as cash flow hedges: Amount of Gain (Loss) Recognized in AOCI Location of Gain (Loss) Amount of Gain (Loss) Reclassified from AOCI into Income 2022 2021 2022 2021 Commodity contracts $ 167 $ 816 Cost of products sold $ 816 $ — Total $ 167 $ 816 $ 816 $ —
Effect of Derivative Instruments on the Consolidated Statement of Operations	The following tables summarize the gain (loss) recognized in earnings for derivative instruments not designated as hedging instruments during the three months ended June 30, 2022 and 2021, respectively: Location of Gain (Loss) Amount of Gain (Loss) Recognized in 2022 2021 Derivatives not designated as hedging instruments: Commodity contracts Cost of products sold $ — $ 552 Total effect of derivatives not designated as hedging instruments $ — $ 552 The following tables summarize the gain (loss) recognized in earnings for derivative instruments not designated as hedging instruments during the six months ended June 30, 2022 and 2021, respectively: Location of Gain (Loss) Amount of Gain (Loss) Recognized in 2022 2021 Derivatives not designated as hedging instruments: Commodity contracts Cost of products sold $ — $ (884) Total effect of derivatives not designated as hedging instruments $ — $ (884)

Partners' Capital (Deficit) (Ta

Partners' Capital (Deficit) (Tables)	6 Months Ended
	Jun. 30, 2022
Partners' Capital Notes [Abstract]
Reconciliation of Net Income to Partners Interest in Net Income	The following is a reconciliation of net income allocated to the general partner and limited partners for purposes of calculating net income attributable to limited partners per unit: Three Months Ended June 30, Six Months Ended June 30, 2022 2021 2022 2021 Net income $ 6,606 $ (6,612) $ 18,084 $ (4,101) Less general partner’s interest in net income: Distributions payable on behalf of general partner interest 4 4 8 8 General partner interest in undistributed earnings 128 (136) 354 (90) Less income allocable to unvested restricted units 21 (20) 51 (10) Limited partners’ interest in net income $ 6,453 $ (6,460) $ 17,671 $ (4,009) Three Months Ended June 30, Six Months Ended June 30, 2022 2021 2022 2021 Basic weighted average limited partner units outstanding 38,729,118 38,687,874 38,725,701 38,690,228 Dilutive effect of restricted units issued 21,035 — 27,496 — Total weighted average limited partner diluted units outstanding 38,750,153 38,687,874 38,753,197 38,690,228

Unit Based Awards - Long Term_2

Unit Based Awards - Long Term Incentive Plans (Tables)	6 Months Ended
	Jun. 30, 2022
Share-Based Payment Arrangement [Abstract]
Schedule of Compensation Costs Related to Unit Based Plan	Amounts recognized in operating expense and selling, general, and administrative expense in the consolidated and condensed financial statements with respect to these plans are as follows: Three Months Ended June 30, Six Months Ended June 30, 2022 2021 2022 2021 Restricted unit Awards Employees $ — $ — $ — $ 194 Non-employee directors 45 48 79 94 Phantom unit Awards Employees 1,077 — 1,981 — Non-employee directors — — — — Total unit-based compensation expense $ 1,122 $ 48 $ 2,060 $ 288
Summary of Restricted Unit Activity	A summary of the restricted unit activity for the six months ended June 30, 2022 is provided below: Number of Units Weighted Average Grant-Date Fair Value Per Unit Non-vested, beginning of period 114,876 $ 3.65 Granted (TBRU) 48,000 $ 2.22 Vested (38,514) $ 4.76 Forfeited — $ — Non-Vested, end of period 124,362 $ 2.75 Aggregate intrinsic value, end of period $ 495
Summary of Aggregate Intrinsic Value and Fair Value of Units Vested	A summary of the restricted units’ aggregate intrinsic value (market value at vesting date) and fair value of units vested (market value at date of grant) during the three and six months ended June 30, 2022 and 2021 is provided below: Three Months Ended June 30, Six Months Ended June 30, 2022 2021 2022 2021 Aggregate intrinsic value of units vested $ — $ — $ 92 $ 257 Fair value of units vested — — 188 1,418

Related Party Transactions (Tab

Related Party Transactions (Tables)	6 Months Ended
	Jun. 30, 2022
Related Party Transactions [Abstract]
The Impact of Related Party Transactions	The impact of related party revenues from sales of products and services is reflected in the consolidated and condensed financial statements as follows: Three Months Ended June 30, Six Months Ended June 30, 2022 2021 2022 2021 Revenues: Terminalling and storage $ 17,416 $ 15,569 $ 33,620 $ 30,875 Transportation 7,463 4,889 13,751 8,899 Product sales: Sulfur services 40 29 69 59 Terminalling and storage 55 42 344 126 95 71 416 185 $ 24,974 $ 20,529 $ 47,787 $ 39,959 The impact of related party cost of products sold is reflected in the consolidated and condensed financial statements as follows: Three Months Ended June 30, Six Months Ended June 30, 2022 2021 2022 2021 Cost of products sold: Sulfur services $ 2,592 $ 2,403 $ 5,268 $ 4,938 Terminalling and storage 10,209 7,036 19,860 11,604 $ 12,801 $ 9,439 $ 25,128 $ 16,542 The impact of related party operating expenses is reflected in the consolidated and condensed financial statements as follows: Three Months Ended June 30, Six Months Ended June 30, 2022 2021 2022 2021 Operating expenses: Transportation $ 16,471 $ 13,644 $ 31,734 $ 26,703 Natural gas liquids 518 513 1,028 977 Sulfur services 1,789 1,306 3,034 2,049 Terminalling and storage 4,668 4,127 9,030 8,229 $ 23,446 $ 19,590 $ 44,826 $ 37,958 The impact of related party selling, general and administrative expenses is reflected in the consolidated and condensed financial statements as follows: Three Months Ended June 30, Six Months Ended June 30, 2022 2021 2022 2021 Selling, general and administrative: Transportation $ 1,838 $ 1,701 $ 3,803 $ 3,371 Natural gas liquids 196 276 1,535 2,084 Sulfur services 999 736 1,995 1,507 Terminalling and storage 967 832 2,025 1,652 Indirect, including overhead allocation 3,498 3,740 6,948 7,351 $ 7,498 $ 7,285 $ 16,306 $ 15,965

Business Segments (Tables)

Business Segments (Tables)	6 Months Ended
	Jun. 30, 2022
Segment Reporting [Abstract]
Segment Reporting by Segment	Three Months Ended June 30, 2022 Operating Revenues Intersegment Revenues Eliminations Operating Revenues after Eliminations Depreciation and Amortization Operating Income (Loss) after Eliminations Capital Expenditures and Plant Turnaround Costs Terminalling and storage 58,410 (1,779) 56,631 7,731 4,068 2,501 Transportation 60,902 (5,070) 55,832 3,590 6,155 933 Sulfur services 56,953 — 56,953 2,882 12,000 1,131 Natural gas liquids 97,580 — 97,580 597 3,657 210 Indirect selling, general and administrative — — — — (4,390) — Total $ 273,845 $ (6,849) $ 266,996 $ 14,800 $ 21,490 $ 4,775 Three Months Ended June 30, 2021 Operating Revenues Intersegment Revenues Eliminations Operating Revenues after Eliminations Depreciation and Amortization Operating Income (Loss) after Eliminations Capital Expenditures and Plant Turnaround Costs Terminalling and storage 45,524 (1,675) 43,849 6,996 2,576 1,507 Transportation 38,349 (3,423) 34,926 4,331 (2,709) 1,091 Sulfur services 38,286 — 38,286 2,568 8,249 799 Natural gas liquids 67,232 — 67,232 588 3,297 140 Indirect selling, general and administrative — — — — (3,780) — Total $ 189,391 $ (5,098) $ 184,293 $ 14,483 $ 7,633 $ 3,537 Six Months Ended June 30, 2022 Operating Revenues Intersegment Revenues Eliminations Operating Revenues after Eliminations Depreciation and Amortization Operating Income (Loss) after Eliminations Capital Expenditures and Plant Turnaround Costs Terminalling and storage $ 112,793 $ (3,357) $ 109,436 $ 15,337 $ 6,935 $ 6,445 Transportation 112,799 (10,257) 102,542 7,163 7,943 4,514 Sulfur services 116,076 — 116,076 5,591 26,837 3,094 Natural gas liquids 218,146 (3) 218,143 1,195 13,736 657 Indirect selling, general and administrative — — — — (8,512) — Total $ 559,814 $ (13,617) $ 546,197 $ 29,286 $ 46,939 $ 14,710 Six Months Ended June 30, 2021 Operating Revenues Intersegment Revenues Eliminations Operating Revenues after Eliminations Depreciation and Amortization Operating Income (Loss) after Eliminations Capital Expenditures and Plant Turnaround Costs Terminalling and storage $ 85,358 $ (3,270) $ 82,088 $ 14,101 $ 4,884 $ 4,172 Transportation 72,318 (7,577) 64,741 8,329 (8,212) 1,616 Sulfur services 73,121 — 73,121 5,288 16,602 3,863 Natural gas liquids 165,317 — 165,317 1,199 17,744 461 Indirect selling, general and administrative — — — — (7,699) — Total $ 396,114 $ (10,847) $ 385,267 $ 28,917 $ 23,319 $ 10,112
Assets by Segment	The Partnership's assets by reportable segment as of June 30, 2022 and December 31, 2021, are as follows: June 30, 2022 December 31, 2021 Total assets: Terminalling and storage $ 244,362 $ 248,194 Transportation 155,382 145,177 Sulfur services 115,409 108,007 Natural gas liquids 121,008 78,483 Total assets $ 636,161 $ 579,861

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	6 Months Ended
	Jun. 30, 2022
Fair Value Disclosures [Abstract]
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis	Assets and liabilities measured at fair value on a recurring basis are summarized below: Level 2 June 30, 2022 December 31, 2021 Commodity derivative contracts, net $ — $ — June 30, 2022 December 31, 2021 Carrying Fair Carrying Fair 2024 Notes $ 51,890 $ 53,975 $ 51,317 $ 55,220 2025 Notes $ 290,286 $ 290,113 $ 290,667 $ 307,146 Total $ 342,176 $ 344,088 $ 341,984 $ 362,366

Income Taxes (Tables)

Income Taxes (Tables)	6 Months Ended
	Jun. 30, 2022
Income Tax Disclosure [Abstract]
Schedule of Income Tax Expense	Three Months Ended June 30, Six Months Ended June 30, 2022 2021 2022 2021 Provision for income taxes $ 2,037 $ 935 $ 3,578 $ 1,157

Nature of Operations and Basi_2

Nature of Operations and Basis of Presentation (Details)	6 Months Ended
	Jun. 30, 2022 segment
Accounting Policies [Abstract]
Number of primary business lines	4

Revenue - Disaggregation of Rev

Revenue - Disaggregation of Revenue (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Disaggregation of Revenue
Revenues		$ 266,996	$ 184,293	$ 546,197	$ 385,267
Lubricant product sales
Disaggregation of Revenue
Revenues	[1]	36,192	25,147	69,584	45,008
Throughput and storage
Disaggregation of Revenue
Revenues	[1]	20,439	18,702	39,852	37,080
Natural gas liquids
Disaggregation of Revenue
Revenues	[1]	97,580	67,232	218,143	165,317
Sulfur services
Disaggregation of Revenue
Revenues		3,084	2,949	6,168	5,899
Terminalling and storage segment
Disaggregation of Revenue
Revenues		56,631	43,849	109,436	82,088
Terminalling and storage segment | Lubricant product sales
Disaggregation of Revenue
Revenues		36,192	25,147	69,584	45,008
Terminalling and storage segment | Throughput and storage
Disaggregation of Revenue
Revenues		20,439	18,702	39,852	37,080
Natural gas liquids segment
Disaggregation of Revenue
Revenues		97,580	67,232	218,143	165,317
Natural gas liquids segment | Natural gas liquids
Disaggregation of Revenue
Revenues		97,580	67,232	218,143	165,317
Sulfur services segment
Disaggregation of Revenue
Revenues		56,953	38,286	116,076	73,121
Sulfur services segment | Sulfur product sales
Disaggregation of Revenue
Revenues				23,634	14,454
Sulfur services segment | Fertilizer product sales
Disaggregation of Revenue
Revenues				86,274	52,768
Sulfur services segment | Sulfur services
Disaggregation of Revenue
Revenues				6,168	5,899
Transportation segment
Disaggregation of Revenue
Revenues		55,832	34,926	102,542	64,741
Transportation segment | Land transportation
Disaggregation of Revenue
Revenues				78,485	50,442
Transportation segment | Inland transportation
Disaggregation of Revenue
Revenues				20,455	13,357
Transportation segment | Offshore transportation
Disaggregation of Revenue
Revenues				$ 3,602	$ 942
Sulfur services
Disaggregation of Revenue
Revenues		56,953	38,286
Sulfur services | Sulfur product sales
Disaggregation of Revenue
Revenues		13,565	7,386
Sulfur services | Fertilizer product sales
Disaggregation of Revenue
Revenues		40,304	27,951
Sulfur services | Sulfur services
Disaggregation of Revenue
Revenues		3,084	2,949
Transportation
Disaggregation of Revenue
Revenues		55,832	34,926
Transportation | Land transportation
Disaggregation of Revenue
Revenues		42,980	27,486
Transportation | Inland transportation
Disaggregation of Revenue
Revenues		11,036	6,633
Transportation | Offshore transportation
Disaggregation of Revenue
Revenues		$ 1,816	$ 807
[1]Related Party Transactions Included Above Three Months Ended Six Months Ended June 30, June 30, 2022 2021 2022 2021 Revenues:* Terminalling and storage $ 17,416 $ 15,569 $ 33,620 $ 30,875 Transportation 7,463 4,889 13,751 8,899 Product Sales 95 71 416 185 Costs and expenses:* Cost of products sold: (excluding depreciation and amortization) Sulfur services 2,592 2,403 5,268 4,938 Terminalling and storage 10,209 7,036 19,860 11,604 Expenses: Operating expenses 23,446 19,590 44,826 37,958 Selling, general and administrative 7,498 7,285 16,306 15,965

Revenue - Estimated Revenue Exp

Revenue - Estimated Revenue Expected to be Recognized in Future (Details) $ in Thousands	Jun. 30, 2022 USD ($)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction
Revenue, remaining performance obligation	$ 521,416
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-07-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction
Revenue, remaining performance obligation	$ 33,184
Revenue, remaining performance obligation, expected timing of satisfaction, period	6 months
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction
Revenue, remaining performance obligation	$ 65,341
Revenue, remaining performance obligation, expected timing of satisfaction, period	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction
Revenue, remaining performance obligation	$ 64,969
Revenue, remaining performance obligation, expected timing of satisfaction, period	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction
Revenue, remaining performance obligation	$ 53,925
Revenue, remaining performance obligation, expected timing of satisfaction, period	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction
Revenue, remaining performance obligation	$ 51,226
Revenue, remaining performance obligation, expected timing of satisfaction, period	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2027-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction
Revenue, remaining performance obligation	$ 252,771
Revenue, remaining performance obligation, expected timing of satisfaction, period
Terminalling and storage segment | Terminalling and storage
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction
Revenue, remaining performance obligation	$ 450,853
Terminalling and storage segment | Terminalling and storage | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-07-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction
Revenue, remaining performance obligation	$ 21,517
Revenue, remaining performance obligation, expected timing of satisfaction, period	6 months
Terminalling and storage segment | Terminalling and storage | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction
Revenue, remaining performance obligation	$ 42,247
Revenue, remaining performance obligation, expected timing of satisfaction, period	1 year
Terminalling and storage segment | Terminalling and storage | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction
Revenue, remaining performance obligation	$ 43,571
Revenue, remaining performance obligation, expected timing of satisfaction, period	1 year
Terminalling and storage segment | Terminalling and storage | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction
Revenue, remaining performance obligation	$ 44,878
Revenue, remaining performance obligation, expected timing of satisfaction, period	1 year
Terminalling and storage segment | Terminalling and storage | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction
Revenue, remaining performance obligation	$ 46,164
Revenue, remaining performance obligation, expected timing of satisfaction, period	1 year
Terminalling and storage segment | Terminalling and storage | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2027-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction
Revenue, remaining performance obligation	$ 252,476
Revenue, remaining performance obligation, expected timing of satisfaction, period
Natural gas liquids | Natural gas liquids
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction
Revenue, remaining performance obligation	$ 22,132
Natural gas liquids | Natural gas liquids | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-07-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction
Revenue, remaining performance obligation	$ 2,814
Revenue, remaining performance obligation, expected timing of satisfaction, period	6 months
Natural gas liquids | Natural gas liquids | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction
Revenue, remaining performance obligation	$ 5,391
Revenue, remaining performance obligation, expected timing of satisfaction, period	1 year
Natural gas liquids | Natural gas liquids | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction
Revenue, remaining performance obligation	$ 5,405
Revenue, remaining performance obligation, expected timing of satisfaction, period	1 year
Natural gas liquids | Natural gas liquids | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction
Revenue, remaining performance obligation	$ 5,391
Revenue, remaining performance obligation, expected timing of satisfaction, period	1 year
Natural gas liquids | Natural gas liquids | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction
Revenue, remaining performance obligation	$ 3,131
Revenue, remaining performance obligation, expected timing of satisfaction, period	1 year
Natural gas liquids | Natural gas liquids | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2027-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction
Revenue, remaining performance obligation	$ 0
Revenue, remaining performance obligation, expected timing of satisfaction, period
Sulfur services segment | Sulfur services
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction
Revenue, remaining performance obligation	$ 48,431
Sulfur services segment | Sulfur services | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-07-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction
Revenue, remaining performance obligation	$ 8,853
Revenue, remaining performance obligation, expected timing of satisfaction, period	6 months
Sulfur services segment | Sulfur services | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction
Revenue, remaining performance obligation	$ 17,703
Revenue, remaining performance obligation, expected timing of satisfaction, period	1 year
Sulfur services segment | Sulfur services | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction
Revenue, remaining performance obligation	$ 15,993
Revenue, remaining performance obligation, expected timing of satisfaction, period	1 year
Sulfur services segment | Sulfur services | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction
Revenue, remaining performance obligation	$ 3,656
Revenue, remaining performance obligation, expected timing of satisfaction, period	1 year
Sulfur services segment | Sulfur services | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction
Revenue, remaining performance obligation	$ 1,931
Revenue, remaining performance obligation, expected timing of satisfaction, period	1 year
Sulfur services segment | Sulfur services | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2027-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction
Revenue, remaining performance obligation	$ 295
Revenue, remaining performance obligation, expected timing of satisfaction, period

Inventories (Details)

Inventories (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Inventory Disclosure [Abstract]
Natural gas liquids	$ 67,614	$ 20,034
Sulfur	1,480	612
Fertilizer	21,009	13,005
Lubricants	23,262	23,876
Other	4,480	4,593
Inventories	$ 117,845	$ 62,120

Debt (Details)

Debt (Details)			6 Months Ended
	Jul. 20, 2022	Apr. 14, 2022 USD ($)	Jun. 30, 2022 USD ($)	Dec. 31, 2021 USD ($)	Jul. 16, 2021 USD ($)	Jul. 15, 2021 USD ($)
Debt Instrument
Total long-term debt			$ 489,325,000	$ 498,871,000
Less: current portion			0	0
Total long-term debt, net of current portion			489,325,000	498,871,000
Current installments of finance lease obligations			169,000	280,000
Finance lease obligations			0	9,000
Total lease liability			169,000	289,000
Credit Facility
Debt Instrument
Total long-term debt			147,149,000	156,887,000
Maximum borrowing capacity			$ 275,000,000		$ 275,000,000	$ 300,000,000
Weighted average interest rate (percent)			5%
Unamortized debt issuance costs			$ 1,851,000	$ 2,613,000
Credit Facility | LIBOR
Debt Instrument
Interest rate floor (percent)			1%	1%
Applicable margins (percent)			3.25%
Credit Facility | LIBOR | Subsequent Event
Debt Instrument
Applicable margins (percent)	3%
Credit Facility | LIBOR | Minimum
Debt Instrument
Applicable margins (percent)			2.75%
Credit Facility | LIBOR | Maximum
Debt Instrument
Applicable margins (percent)			4%
Credit Facility | Prime Rate | Minimum
Debt Instrument
Applicable margins (percent)			1.75%
Credit Facility | Prime Rate | Maximum
Debt Instrument
Applicable margins (percent)			3%
Senior Notes | Senior Notes 10.0%
Debt Instrument
Total long-term debt			$ 51,890,000	$ 51,317,000
Unamortized debt issuance costs			1,860,000	2,433,000
Face amount			$ 53,750,000
Stated interest rate (percent)			10%
Senior Notes | Senior Note 11.5%
Debt Instrument
Total long-term debt			$ 290,286,000	290,667,000
Unamortized debt issuance costs			1,095,000	$ 1,303,000
Face amount		$ 9,305,000	$ 291,381,000
Stated interest rate (percent)		11.50%	11.50%
Repayments of principal debt		$ 589,000
Repayment of debt percentage		0.0020
Purchase price percent tendered notes		1

Debt - Narratives (Details)

Debt - Narratives (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Debt Disclosure [Abstract]
Cash paid for interest	$ 2,258,000	$ 2,648,000	$ 24,109,000	$ 25,995,000
Capitalized interest	$ 0	$ 0	$ 0	$ 0

Leases - Narrative (Details)

Leases - Narrative (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2022 USD ($)
New Accounting Pronouncements or Change in Accounting Principle
Lease termination term	1 year
Non-cancelable revenue arrangements, future minimum revenues, 2022	$ 10,740
Non-cancelable revenue arrangements, future minimum revenues, 2023	15,807
Non-cancelable revenue arrangements, future minimum revenues, 2024	15,322
Non-cancelable revenue arrangements, future minimum revenues, 2025	14,742
Non-cancelable revenue arrangements, future minimum revenues, 2026	8,977
Non-cancelable revenue arrangements, future minimum revenues, subsequent years	$ 32,936
Minimum
New Accounting Pronouncements or Change in Accounting Principle
Remaining lease term (years)	1 year
Maximum
New Accounting Pronouncements or Change in Accounting Principle
Remaining lease term (years)	14 years
Lease renewal term (years)	5 years

Leases - Lease Costs (Details)

Leases - Lease Costs (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Leases [Abstract]
Operating lease cost	$ 2,540	$ 2,199	$ 4,811	$ 4,501
Finance lease cost:
Amortization of right-of-use assets	25	25	50	115
Interest on lease liabilities	3	6	7	16
Short-term lease cost	2,887	2,473	5,505	5,581
Variable lease cost	41	26	84	59
Total lease cost	$ 5,496	$ 4,729	$ 10,457	$ 10,272

Leases - Balance Sheet Informat

Leases - Balance Sheet Information (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Operating Leases
Operating lease right-of-use assets	$ 30,249	$ 21,861
Current portion of operating lease liabilities included in "Other accrued liabilities"	8,207	6,600
Operating lease liabilities	22,455	15,704
Total operating lease liabilities	$ 30,662	$ 22,304
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List]	Other accrued liabilities	Other accrued liabilities
Finance Leases
Property, plant and equipment, at cost	$ 1,071	$ 1,071
Accumulated depreciation	(413)	(364)
Property, plant and equipment, net	658	707
Current installments of finance lease obligations	169	280
Finance lease obligations	0	9
Total finance lease obligations	$ 169	$ 289
Finance Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration]	Long-Term Debt and Lease Obligation, Current	Long-Term Debt and Lease Obligation, Current

Leases - Future Minimum Lease O

Leases - Future Minimum Lease Obligations (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Operating Leases
Year 1	$ 9,463
Year 2	6,772
Year 3	4,713
Year 4	3,889
Year 5	2,829
Thereafter	7,954
Total	35,620
Less amounts representing interest costs	(4,958)
Total lease liability	30,662	$ 22,304
Finance Leases
Year 1	172
Year 2	0
Year 3	0
Year 4	0
Year 5	0
Thereafter	0
Total	172
Less amounts representing interest costs	(3)
Total lease liability	$ 169	$ 289

Supplemental Balance Sheet In_3

Supplemental Balance Sheet Information - Other Accrued Liabilities (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Balance Sheet Related Disclosures [Abstract]
Accrued interest	$ 14,733	$ 15,135
Asset retirement obligations	412	261
Property and other taxes payable	3,627	4,631
Accrued payroll	3,802	2,973
Operating lease liabilities	8,207	6,600
Other	732	250
Total other accrued liabilities	$ 31,513	$ 29,850

Supplemental Balance Sheet In_4

Supplemental Balance Sheet Information - Asset Retirement Obligations (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2022	Dec. 31, 2021
Asset Retirement Obligation, Roll Forward Analysis
Asset retirement obligations as of December 31, 2021	$ 9,072
Additions to asset retirement obligations	0
Accretion expense	190
Liabilities settled	(3,902)
Ending asset retirement obligations	5,360
Current portion of asset retirement obligations	(412)	$ (261)
Long-term portion of asset retirement obligations	$ 4,948

Derivative Instruments and He_3

Derivative Instruments and Hedging Activities - Narrative (Details) - bbl bbl in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2022	Dec. 31, 2021
Commodity contracts
Derivatives, Fair Value
Notional quantity (in bbl)	0	0

Derivative Instruments and He_4

Derivative Instruments and Hedging Activities - Balance Sheet Derivatives (Details) - Designated as Hedging Instrument - Commodity contracts - Fair value of derivatives - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Derivatives, Fair Value
Derivative Assets	$ 0	$ 0
Derivative Liabilities	$ 0	$ 0

Derivative Instruments and He_5

Derivative Instruments and Hedging Activities - Derivative Financial Instruments Designated as Cash Flow Hedges (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax
Amount of Gain (Loss) Recognized in AOCI	$ 167	$ 0	$ 167	$ 0
Amount of Gain (Loss) Reclassified from AOCI into Income	(440)	0	816	0
Designated as Hedging Instrument
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax
Amount of Gain (Loss) Recognized in AOCI	167	816	167	816
Amount of Gain (Loss) Reclassified from AOCI into Income	(440)	0	816	0
Commodity contracts | Designated as Hedging Instrument
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax
Amount of Gain (Loss) Recognized in AOCI	167	816	167	816
Commodity contracts | Cost of products sold | Designated as Hedging Instrument
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax
Amount of Gain (Loss) Reclassified from AOCI into Income	$ (440)	$ 0	$ 816	$ 0

Derivative Instruments and He_6

Derivative Instruments and Hedging Activities - Statement of Operations Derivatives (Details) - Derivatives not designated as hedging instruments - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Derivative Instruments, Gain (Loss)
Amount of Gain (Loss) Recognized in Income on Derivatives	$ 0	$ 552	$ 0	$ (884)
Commodity contracts | Cost of products sold
Derivative Instruments, Gain (Loss)
Amount of Gain (Loss) Recognized in Income on Derivatives	$ 0	$ 552	$ 0	$ (884)

Partners' Capital (Deficit) - N

Partners' Capital (Deficit) - Narrative (Details) - USD ($) $ in Thousands	6 Months Ended		12 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2019
Limited Partners' Capital Account
Common limited partner units (in shares)	38,850,750
Cash distributions	$ 396	$ 396
Martin Resource Management
Limited Partners' Capital Account
Common limited partner units (in shares)	6,114,532
Martin Resource Management Corporation
Limited Partners' Capital Account
Ownership interest (percentage)	98%
Martin Resource Management Corporation | Martin Resource Management Corporation
Limited Partners' Capital Account
Purchase price			$ 552,058
Cash distributions			$ 289,019
MMGP LLC
Limited Partners' Capital Account
General partner interest percentage	2%
MMGP LLC | Martin Resource Management
Limited Partners' Capital Account
Ownership interest (percentage)	15.70%
General partner interest percentage	2%

Partners' Capital (Deficit) - I

Partners' Capital (Deficit) - Incentive Distribution Rights and Distributions of Available Cash (Details) - USD ($)	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Limited Partners' Capital Account
Distribution period	45 days
MMGP
Limited Partners' Capital Account
Incentive distribution	$ 0	$ 0
MMGP LLC
Limited Partners' Capital Account
General partner interest percentage	2%
MMGP LLC | MMGP
Limited Partners' Capital Account
General partner interest percentage	2%

Partners' Capital (Deficit) -_2

Partners' Capital (Deficit) - Net Income Per Unit (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Partners' Capital Notes [Abstract]
Net income	$ 6,606	$ (6,612)	$ 18,084	$ (4,101)
Less general partner’s interest in net income:
Distributions payable on behalf of general partner interest	4	4	8	8
General partner interest in undistributed earnings	128	(136)	354	(90)
Less income allocable to unvested restricted units	21	(20)	51	(10)
Limited partners' interest in net income	$ 6,453	$ (6,460)	$ 17,671	$ (4,009)
Basic weighted average limited partner units outstanding (in shares)	38,729,118	38,687,874	38,725,701	38,690,228
Dilutive effect of restricted units issued (in shares)	21,035	0	27,496	0
Total weighted average limited partner diluted units outstanding (in shares)	38,750,153	38,687,874	38,753,197	38,690,228

Unit Based Awards - Long Term_3

Unit Based Awards - Long Term Incentive Plans - Schedule of Compensation Costs (Details) - Selling, General and Administrative Expenses - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Share-based Compensation Arrangement by Share-based Payment Award
Total unit-based compensation expense	$ 1,122	$ 48	$ 2,060	$ 288
Restricted unit Awards | Employees
Share-based Compensation Arrangement by Share-based Payment Award
Total unit-based compensation expense	0	0	0	194
Restricted unit Awards | Non-employee directors
Share-based Compensation Arrangement by Share-based Payment Award
Total unit-based compensation expense	45	48	79	94
Phantom unit Awards | Employees
Share-based Compensation Arrangement by Share-based Payment Award
Total unit-based compensation expense	1,077	0	1,981	0
Phantom unit Awards | Non-employee directors
Share-based Compensation Arrangement by Share-based Payment Award
Total unit-based compensation expense	$ 0	$ 0	$ 0	$ 0

Unit Based Awards - Long Term_4

Unit Based Awards - Long Term Incentive Plans - Narrative (Details) $ in Thousands							1 Months Ended		6 Months Ended
	Jan. 24, 2026 shares	Jan. 24, 2025 shares	Jan. 24, 2024 shares	Jan. 24, 2023 shares	Apr. 20, 2022 shares	Jul. 21, 2021 shares	Apr. 30, 2022 director shares	Feb. 28, 2022 director shares	Jun. 30, 2022 USD ($) shares	Apr. 19, 2022 shares	May 26, 2017 shares
Share-based Compensation Arrangement by Share-based Payment Award
Number of shares authorized (in shares)											3,000,000
Phantom unit Awards
Share-based Compensation Arrangement by Share-based Payment Award
Trading days						20 days
Unrecognized compensation cost related to non-vested restricted units | $									$ 9,309
Weighted average period for recognition (in years)									2 years 6 months 25 days
Shares available for grant (in shares)					5,000,000					2,000,000
Phantom unit Awards | Employees
Share-based Compensation Arrangement by Share-based Payment Award
Granted, number of units (in shares)					365,000	620,000
Restricted unit Awards
Share-based Compensation Arrangement by Share-based Payment Award
Unrecognized compensation cost related to non-vested restricted units | $									$ 275
Weighted average period for recognition (in years)									2 years 4 months 20 days
Vested, number of units (in shares)									38,514
Restricted unit Awards | Employees
Share-based Compensation Arrangement by Share-based Payment Award
Vesting period (in years)									3 years
Restricted unit Awards | Non-employee directors
Share-based Compensation Arrangement by Share-based Payment Award
Vesting period (in years)									4 years
February Time Based Restricted Units
Share-based Compensation Arrangement by Share-based Payment Award
Number of independent directors receiving grants | director								3
February Time Based Restricted Units | Non-employee directors
Share-based Compensation Arrangement by Share-based Payment Award
Granted, number of units (in shares)								11,400
February Time Based Restricted Units | Non-employee directors | Scenario, Forecast
Share-based Compensation Arrangement by Share-based Payment Award
Vested, number of units (in shares)	3,800	3,800	3,800	3,800
April Time Based Restricted Units
Share-based Compensation Arrangement by Share-based Payment Award
Number of independent directors receiving grants | director							3
April Time Based Restricted Units | Non-employee directors
Share-based Compensation Arrangement by Share-based Payment Award
Granted, number of units (in shares)							13,800
April Time Based Restricted Units | Non-employee directors | Scenario, Forecast
Share-based Compensation Arrangement by Share-based Payment Award
Vested, number of units (in shares)	4,600	4,600	4,600	4,600
Phantom Units Appreciation Rights | Employees
Share-based Compensation Arrangement by Share-based Payment Award
Granted, number of units (in shares)					1,097,500	1,245,000

Unit Based Awards - Long Term_5

Unit Based Awards - Long Term Incentive Plans - Restricted Unit Activity (Details) $ / shares in Units, $ in Thousands	6 Months Ended
	Jun. 30, 2022 USD ($) $ / shares shares
Restricted unit Awards
Number of Units
Non-vested, beginning of period (in shares) | shares	114,876
Vested (in shares) | shares	(38,514)
Forfeited (in shares) | shares	0
Non-vested, end of period (in shares) | shares	124,362
Weighted Average Grant-Date Fair Value Per Unit
Non-vested, beginning of period (USD per share) | $ / shares	$ 3.65
Vested (USD per share) | $ / shares	4.76
Forfeited (USD per share) | $ / shares	0
Non-vested, end of period (USD per share) | $ / shares	$ 2.75
Aggregate intrinsic value, end of period | $	$ 495
Time Based Restricted Units
Number of Units
Granted (in shares) | shares	48,000
Weighted Average Grant-Date Fair Value Per Unit
Granted (USD per share) | $ / shares	$ 2.22

Unit Based Awards - Long Term_6

Unit Based Awards - Long Term Incentive Plans - Intrinsic and Fair Value (Details) - Restricted unit Awards - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Share-based Compensation Arrangement by Share-based Payment Award
Aggregate intrinsic value of units vested	$ 0	$ 0	$ 92	$ 257
Fair value of units vested	$ 0	$ 0	$ 188	$ 1,418

Related Party Transactions - Na

Related Party Transactions - Narrative (Details)	6 Months Ended
	Jun. 30, 2022 shares
MMGP LLC
Related Party Transaction
General partner interest percentage	2%
Martin Resource Management | Martin Resource Management Corporation | Martin Midstream Partners L.P.
Related Party Transaction
Common limited partner units (in shares)	6,114,532
Voting interest percentage	15.70%
Martin Resource Management | Martin Resource Management | MMGP Holdings, LLC
Related Party Transaction
General partner interest percentage	100%
Martin Resource Management | MMGP LLC
Related Party Transaction
General partner interest percentage	2%

Related Party Transactions - Om

Related Party Transactions - Omnibus Agreement (Details) - Omnibus Agreement - Martin Resource Management - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Jan. 01, 2022
Related Party Transaction
Non-compete restriction threshold	$ 5,000,000		$ 5,000,000
Non-compete restriction ownership option opportunity threshold minimum	5,000,000		5,000,000
Non-compete restriction ownership option opportunity threshold minimum with equity limitation	$ 5,000,000		$ 5,000,000
Equity limitation on ownership restriction percentage	20%		20%
Approved annual reimbursements for indirect expenses					$ 13,491,000
Indirect expenses reimbursed	$ 3,373,000	$ 3,652,000	$ 6,746,000	$ 7,193,000

Related Party Transactions - Ma

Related Party Transactions - Master Transportation Services Agreement (Details)	6 Months Ended
	Jun. 30, 2022
Master Transportation Services Agreement | Martin Resource Management
Related Party Transaction
Termination written notice, minimum (in days)	30 days

Related Party Transactions - _2

Related Party Transactions - Marine Agreements (Details) - Marine Transportation Agreement - Martin Resource Management	6 Months Ended
	Jun. 30, 2022
Related Party Transaction
Automatic consecutive term renewal period (in years)	1 year
Termination written notice, minimum (in days)	60 days

Related Party Transactions - Te

Related Party Transactions - Terminal Services Agreements (Details)	6 Months Ended
	Jun. 30, 2022
Terminal Services Agreements | Martin Resource Management
Related Party Transaction
Termination written notice, minimum (in days)	60 days

Related Party Transactions - Ot

Related Party Transactions - Other Agreements (Details) - Martin Resource Management $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022 USD ($) bbl	Jun. 30, 2021 USD ($)	Jun. 30, 2022 USD ($) bbl	Jun. 30, 2021 USD ($)	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)
East Texas Mack Leases
Related Party Transaction
Ownership interest (percent)	46%		46%
Operating cash flows from operating leases	$ 453	$ 282	$ 763	$ 518
Cross Tolling Agreement
Related Party Transaction
Production minimum per day (in bbl) | bbl	6,500		6,500
Capital recovery fee reimbursement, expired					$ 2,586	$ 2,088
Annual escalation benchmark percentage	3%		3%
Annual revenue decrease from contract expiration			$ 2,145

Related Party Transactions - Sc

Related Party Transactions - Schedule of the Impact of Related Party Transactions (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Operating expenses:
Operating expenses	$ 23,446	$ 19,590	$ 44,826	$ 37,958
Related Party
Revenues:
Revenue from related parties	24,974	20,529	47,787	39,959
Cost of products sold:
Cost of products sold	12,801	9,439	25,128	16,542
Operating expenses:
Operating expenses	23,446	19,590	44,826	37,958
Selling, general and administrative:
Selling, general and administrative	7,498	7,285	16,306	15,965
Related Party | Indirect, including overhead allocation
Selling, general and administrative:
Selling, general and administrative	3,498	3,740	6,948	7,351
Related Party | Terminalling and storage
Revenues:
Revenue from related parties	17,416	15,569	33,620	30,875
Operating expenses:
Operating expenses	4,668	4,127	9,030	8,229
Selling, general and administrative:
Selling, general and administrative	967	832	2,025	1,652
Related Party | Transportation
Revenues:
Revenue from related parties	7,463	4,889	13,751	8,899
Operating expenses:
Operating expenses	16,471	13,644	31,734	26,703
Selling, general and administrative:
Selling, general and administrative	1,838	1,701	3,803	3,371
Related Party | Natural gas liquids
Operating expenses:
Operating expenses	518	513	1,028	977
Selling, general and administrative:
Selling, general and administrative	196	276	1,535	2,084
Related Party | Product sales
Revenues:
Revenue from related parties	95	71	416	185
Related Party | Sulfur services
Revenues:
Revenue from related parties	40	29	69	59
Cost of products sold:
Cost of products sold	2,592	2,403	5,268	4,938
Operating expenses:
Operating expenses	1,789	1,306	3,034	2,049
Selling, general and administrative:
Selling, general and administrative	999	736	1,995	1,507
Related Party | Terminalling and storage
Revenues:
Revenue from related parties	55	42	344	126
Cost of products sold:
Cost of products sold	$ 10,209	$ 7,036	$ 19,860	$ 11,604

Business Segments - Narratives

Business Segments - Narratives (Details)	6 Months Ended
	Jun. 30, 2022 segment
Segment Reporting [Abstract]
Number of reportable segments	4

Business Segments - Income Stat

Business Segments - Income Statement (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Segment Reporting Information
Total revenue	$ 266,996	$ 184,293	$ 546,197	$ 385,267
Depreciation and Amortization	14,800	14,483	29,286	28,917
Operating Income (Loss) after Eliminations	21,490	7,633	46,939	23,319
Capital Expenditures and Plant Turnaround Costs	4,775	3,537	14,710	10,112
Terminalling and storage
Segment Reporting Information
Total revenue	56,631	43,849	109,436	82,088
Depreciation and Amortization	7,731	6,996	15,337	14,101
Operating Income (Loss) after Eliminations	4,068	2,576	6,935	4,884
Capital Expenditures and Plant Turnaround Costs	2,501	1,507	6,445	4,172
Transportation segment
Segment Reporting Information
Total revenue	55,832	34,926	102,542	64,741
Depreciation and Amortization	3,590	4,331	7,163	8,329
Operating Income (Loss) after Eliminations	6,155	(2,709)	7,943	(8,212)
Capital Expenditures and Plant Turnaround Costs	933	1,091	4,514	1,616
Sulfur services
Segment Reporting Information
Total revenue	56,953	38,286	116,076	73,121
Depreciation and Amortization	2,882	2,568	5,591	5,288
Operating Income (Loss) after Eliminations	12,000	8,249	26,837	16,602
Capital Expenditures and Plant Turnaround Costs	1,131	799	3,094	3,863
Natural gas liquids
Segment Reporting Information
Total revenue	97,580	67,232	218,143	165,317
Depreciation and Amortization	597	588	1,195	1,199
Operating Income (Loss) after Eliminations	3,657	3,297	13,736	17,744
Capital Expenditures and Plant Turnaround Costs	210	140	657	461
Operating Revenues
Segment Reporting Information
Total revenue	273,845	189,391	559,814	396,114
Operating Revenues | Terminalling and storage
Segment Reporting Information
Total revenue	58,410	45,524	112,793	85,358
Operating Revenues | Transportation segment
Segment Reporting Information
Total revenue	60,902	38,349	112,799	72,318
Operating Revenues | Sulfur services
Segment Reporting Information
Total revenue	56,953	38,286	116,076	73,121
Operating Revenues | Natural gas liquids
Segment Reporting Information
Total revenue	97,580	67,232	218,146	165,317
Intersegment Revenues Eliminations
Segment Reporting Information
Total revenue	(6,849)	(5,098)	(13,617)	(10,847)
Intersegment Revenues Eliminations | Terminalling and storage
Segment Reporting Information
Total revenue	(1,779)	(1,675)	(3,357)	(3,270)
Intersegment Revenues Eliminations | Transportation segment
Segment Reporting Information
Total revenue	(5,070)	(3,423)	(10,257)	(7,577)
Intersegment Revenues Eliminations | Sulfur services
Segment Reporting Information
Total revenue	0	0	0	0
Intersegment Revenues Eliminations | Natural gas liquids
Segment Reporting Information
Total revenue	0	0	(3)	0
Indirect selling, general and administrative
Segment Reporting Information
Depreciation and Amortization	0	0	0	0
Operating Income (Loss) after Eliminations	(4,390)	(3,780)	(8,512)	(7,699)
Capital Expenditures and Plant Turnaround Costs	$ 0	$ 0	$ 0	$ 0

Business Segments - Balance She

Business Segments - Balance Sheet (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Total assets:
Total assets	$ 636,161	$ 579,861
Terminalling and storage
Total assets:
Total assets	244,362	248,194
Transportation segment
Total assets:
Total assets	155,382	145,177
Sulfur services
Total assets:
Total assets	115,409	108,007
Natural gas liquids
Total assets:
Total assets	$ 121,008	$ 78,483

Fair Value Measurements (Detail

Fair Value Measurements (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Recurring | Level 2 | Commodity Contracts
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Commodity derivative contracts, net	$ 0	$ 0
Nonrecurring | Carrying Value
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Notes payable	342,176	341,984
Nonrecurring | Fair Value
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Notes payable	344,088	362,366
Nonrecurring | 2024 Notes | Carrying Value
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Notes payable	51,890	51,317
Nonrecurring | 2024 Notes | Fair Value
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Notes payable	53,975	55,220
Nonrecurring | 2025 Notes | Carrying Value
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Notes payable	290,286	290,667
Nonrecurring | 2025 Notes | Fair Value
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Notes payable	$ 290,113	$ 307,146

Income Taxes - Income Tax Expen

Income Taxes - Income Tax Expense (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Income Tax Disclosure [Abstract]
Provision for income taxes	$ 2,037	$ 935	$ 3,578	$ 1,157

Income Taxes - Narrative (Detai

Income Taxes - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021
Income Tax Contingency
Income tax expense	$ 2,037	$ 935	$ 3,578	$ 1,157
Deferred income tax expense			2,304	758
TEXAS
Income Tax Contingency
State income taxes	80	61	256	180
MTI
Income Tax Contingency
Income tax expense	$ 1,957	$ 874	$ 3,322	$ 977
Effective income tax rate (percentage)	21.58%	40.22%	21.77%	38.73%
Current federal income tax expense	$ 404	$ 108	$ 723	$ 123
State income tax expense	170	83	295	96
Deferred income tax expense	1,383	$ 683	2,304	$ 758
Deferred tax asset	$ 17,517		$ 17,517		$ 19,821

Subsequent Events (Details)

Subsequent Events (Details) - Subsequent Event	Jul. 20, 2022 $ / shares
Subsequent Event
Dividends declared (USD per share)	$ 0.005
Estimated annualized dividends (USD per share)	$ 0.020