Martin Midstream Partners (MMLP) 10-Q 24 Jul 19 2019 Q2 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	6 Months Ended
	Jun. 30, 2019	Jul. 24, 2019
Cover page.
Document Quarterly Report	true
Document Transition Report	false
Entity Registrant Name	MARTIN MIDSTREAM PARTNERS L.P.
Entity Central Index Key	0001176334
Current Fiscal Year End Date	--12-31
Document Type	10-Q
Document Period End Date	Jun. 30, 2019
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q2
Amendment Flag	false
Entity File Number	000-50056
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 12(b) Security	Common Units representing limited partnership interests
Trading Symbol	MMLP
Security Exchange Name	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)		38,863,389

CONSOLIDATED AND CONDENSED BALA

CONSOLIDATED AND CONDENSED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Assets [Abstract]
Cash	$ 2,521	$ 300	[1]
Accounts and other receivables, less allowance for doubtful accounts of $618 and $576, respectively	64,606	83,488	[1]
Product exchange receivables	107	166	[1]
Inventories (Note 6)	81,220	84,265	[1]
Due from affiliates	35,598	18,845	[1]
Fair value of derivatives (Note 11)	0	4	[1]
Other current assets	9,638	5,889	[1]
Assets held for sale (Note 4)	5,132	5,652	[1]
Current assets - Natural Gas Storage Assets (Note 4)	0	9,428	[1]
Total current assets	198,822	208,037	[1]
Property, plant and equipment, at cost	880,603	886,435	[1]
Accumulated depreciation	(451,359)	(438,602)	[1]
Property, plant and equipment, net	429,244	447,833	[1]
Goodwill	17,785	17,785	[1]
Right-of-use assets (Note 9)	25,682
Deferred income taxes, net (Note 19)	23,925	0	[1]
Other assets, net (Note 10)	5,050	4,584	[1]
Non current assets - Natural Gas Storage Assets (Note 4)	0	395,389	[1]
Total assets	700,508	1,073,628	[1]
Liabilities and Equity [Abstract]
Current installments of finance lease obligations (Note 9)	6,059	5,409	[1]
Trade and other accounts payable	61,357	64,041	[1]
Product exchange payables	7,717	12,103	[1]
Due to affiliates	3,367	2,133	[1]
Income taxes payable	576	445	[1]
Fair value of derivatives (Note 11)	2,069	0	[1]
Other accrued liabilities (Note 10)	29,160	24,380	[1]
Current liabilities - Natural Gas Storage Assets (Note 4)	0	3,240	[1]
Total current liabilities	110,305	111,751	[1]
Long-term debt, net (Note 8 )	596,398	656,459	[1]
Finance lease obligations (Note 9)	4,259	6,272
Operating lease liabilities (Note 9)	17,913
Other long-term obligations	8,747	10,045	[1]
Non current liabilities - Natural Gas Storage Assets (Note 4)	0	669	[1]
Total liabilities	737,622	785,196	[1]
Commitments and contingencies (Note 16)			[1]
Partners’ capital (deficit) (Note 12)	(37,114)	288,432	[1]
Total partners’ capital (deficit)	(37,114)	288,432	[1]
Total liabilities and partners' capital	$ 700,508	$ 1,073,628	[1]
[1]	Financial information for 2018 has been revised to include results attributable to MTI acquired from Martin Resource Management Corporation. See Note 1 – Nature of Operations and Basis of Presentation.

CONSOLIDATED AND CONDENSED BA_2

CONSOLIDATED AND CONDENSED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Statement of Financial Position [Abstract]
Allowance for doubtful accounts	$ 618	$ 576	[1]
[1]	Financial information for 2018 has been revised to include results attributable to MTI acquired from Martin Resource Management Corporation. See Note 1 – Nature of Operations and Basis of Presentation.

CONSOLIDATED AND CONDENSED STAT

CONSOLIDATED AND CONDENSED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands		3 Months Ended			6 Months Ended
		Jun. 30, 2019	Jun. 30, 2018	[1]	Jun. 30, 2019	Jun. 30, 2018	[1]
Revenues:
Revenues		$ 187,323	$ 227,164		$ 427,356	$ 518,882
Cost of products sold: (excluding depreciation and amortization)
Cost of products sold		101,788	143,714		254,545	336,535
Expenses:
Operating expenses	[2]	53,579	52,915		105,428	105,741
Selling, general and administrative	[2]	10,226	8,894		20,426	18,833
Depreciation and amortization		15,087	16,946		29,988	32,258	[3]
Total costs and expenses		180,680	222,469		410,387	493,367
Other operating loss		(1,633)	(206)		(2,353)	(198)
Operating income		5,010	4,489		14,616	25,317
Other income (expense):
Interest expense, net		(14,986)	(13,815)		(28,657)	(26,545)
Other, net		1	5		4	5
Total other expense		(14,985)	(13,810)		(28,653)	(26,540)
Net loss before taxes		(9,975)	(9,321)		(14,037)	(1,223)
Income tax expense		(639)	(132)		(1,335)	(281)
Loss from continuing operations		(10,614)	(9,453)		(15,372)	(1,504)	[3]
Income (loss) from discontinued operations, net of income taxes		(180,568)	4,927		(179,466)	12,014	[3]
Net income (loss)		(191,182)	(4,526)		(194,838)	10,510	[3]
Less general partner's interest in net (income) loss		3,824	145	[4]	3,897	(111)	[4]
Less pre-acquisition (income) allocated to the general partner		0	(2,720)		0	(4,938)
Less (income) loss allocable to unvested restricted units		65	6		67	(2)
Limited partners' interest in net income (loss)		(187,293)	(7,095)	[4]	(190,874)	5,459	[4]
Terminalling and storage
Revenues:
Revenues	[2]	21,377	24,068		44,481	48,115
Transportation
Revenues:
Revenues	[2]	41,321	37,206		79,116	71,565
Sulfur services
Revenues:
Revenues		2,858	2,787		5,717	5,574
Product sales
Revenues:
Revenues	[2]	121,767	163,103		298,042	393,628
Natural gas liquids
Revenues:
Revenues	[2]	57,398	90,625		173,872	249,787
Cost of products sold: (excluding depreciation and amortization)
Cost of products sold	[2]	53,546	84,542		159,736	223,165
Sulfur services
Revenues:
Revenues	[2]	32,998	35,684		61,732	70,584
Cost of products sold: (excluding depreciation and amortization)
Cost of products sold	[2]	22,124	26,886		41,820	49,104
Terminalling and storage
Revenues:
Revenues	[2]	31,371	36,794		62,438	73,257
Cost of products sold: (excluding depreciation and amortization)
Cost of products sold	[2]	$ 26,118	$ 32,286		$ 52,989	$ 64,266
[1]	Financial information for 2018 has been revised to include results attributable to MTI acquired from Martin Resource Management Corporation. See Note 1 – Nature of Operations and Basis of Presentation.
[2]	Related Party Transactions Included Above Three Months Ended Six Months Ended June 30, June 30, 2019 2018 1 2019 2018 1 Revenues:* Terminalling and storage $ 17,477 $ 20,485 $ 36,449 $ 40,493 Transportation 5,856 7,066 11,499 13,759 Product Sales 286 377 707 1,001 Costs and expenses:* Cost of products sold: (excluding depreciation and amortization) Sulfur services 2,884 2,492 5,458 5,340 Terminalling and storage 7,203 7,089 13,112 12,668 Expenses: Operating expenses 24,407 23,758 46,943 46,846 Selling, general and administrative 8,558 6,692 17,093 14,618
[3]	Financial information for 2018 has been revised to include results attributable to MTI acquired from Martin Resource Management Corporation. See Note 1 – Nature of Operations and Basis of Presentation.
[4]	Financial information for 2018 has been revised to include results attributable to MTI acquired from Martin Resource Management Corporation. See Note 1 – Nature of Operations and Basis of Presentation.

CONSOLIDATED AND CONDENSED ST_2

CONSOLIDATED AND CONDENSED STATEMENTS OF OPERATIONS - Allocation of Net Income (Loss) - USD ($) $ in Thousands	3 Months Ended			6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	[1]	Jun. 30, 2019	Jun. 30, 2018	[1]
Limited partner interest:
Continuing operations	$ (10,398)	$ (11,857)		$ (15,060)	$ (6,426)
Discontinued operations	(176,895)	4,762		(175,814)	11,885
Limited partners’ interest in net income (loss)	(187,293)	(7,095)	[2]	(190,874)	5,459	[2]
General partner interest:
Continuing operations	(212)	(303)		(307)	(16)
Discontinued operations	(3,612)	158		(3,590)	127
General partner interest in net income (loss)	$ (3,824)	$ (145)	[2]	$ (3,897)	$ 111	[2]
Basic:
Continuing operations (in dollars per share)	$ (0.27)	$ (0.31)		$ (0.39)	$ (0.17)
Discontinued operations (in dollars per share)	(4.55)	0.13		(4.52)	0.31
Net income (loss) per unit attributable to limited partners, Basic (in dollars per share)	$ (4.82)	$ (0.18)		$ (4.91)	$ 0.14
Weighted average limited partner units - basic (in shares)	38,871,420	38,722,037		38,912,250	38,828,845
Diluted:
Continuing operations (in dollars per share)	$ (0.27)	$ (0.31)		$ (0.39)	$ (0.17)
Discontinued operations (in dollars per share)	(4.55)	0.13		(4.52)	0.31
Net income (loss) per unit attributable to limited partners, Diluted (in dollars per share)	$ (4.82)	$ (0.18)		$ (4.91)	$ 0.14
Weighted average limited partner units - diluted (in shares)	38,871,420	38,722,037		38,912,250	38,834,421
[1]	Financial information for 2018 has been revised to include results attributable to MTI acquired from Martin Resource Management Corporation. See Note 1 – Nature of Operations and Basis of Presentation.
[2]	Financial information for 2018 has been revised to include results attributable to MTI acquired from Martin Resource Management Corporation. See Note 1 – Nature of Operations and Basis of Presentation.

CONSOLIDATED AND CONDENSED ST_3

CONSOLIDATED AND CONDENSED STATEMENTS OF OPERATIONS - Related Party Transactions - USD ($) $ in Thousands		3 Months Ended			6 Months Ended
		Jun. 30, 2019	Jun. 30, 2018		Jun. 30, 2019	Jun. 30, 2018
Revenues:
Revenues		$ 187,323	$ 227,164	[1]	$ 427,356	$ 518,882	[1]
Cost of products sold: (excluding depreciation and amortization)
Cost of products sold		101,788	143,714	[1]	254,545	336,535	[1]
Expenses:
Operating expenses	[2]	53,579	52,915	[1]	105,428	105,741	[1]
Selling, general and administrative	[2]	10,226	8,894	[1]	20,426	18,833	[1]
Terminalling and storage
Revenues:
Revenues	[2]	21,377	24,068	[1]	44,481	48,115	[1]
Transportation
Revenues:
Revenues	[2]	41,321	37,206	[1]	79,116	71,565	[1]
Product Sales
Revenues:
Revenues	[2]	121,767	163,103	[1]	298,042	393,628	[1]
Sulfur services
Revenues:
Revenues	[2]	32,998	35,684	[1]	61,732	70,584	[1]
Cost of products sold: (excluding depreciation and amortization)
Cost of products sold	[2]	22,124	26,886	[1]	41,820	49,104	[1]
Terminalling and storage
Revenues:
Revenues	[2]	31,371	36,794	[1]	62,438	73,257	[1]
Cost of products sold: (excluding depreciation and amortization)
Cost of products sold	[2]	26,118	32,286	[1]	52,989	64,266	[1]
Related Party
Expenses:
Operating expenses		24,407	23,758	[3]	46,943	46,846	[3]
Selling, general and administrative		8,558	6,692	[3]	17,093	14,618	[3]
Related Party | Terminalling and storage
Revenues:
Revenues		17,477	20,485	[3]	36,449	40,493	[3]
Related Party | Transportation
Revenues:
Revenues		5,856	7,066	[3]	11,499	13,759	[3]
Related Party | Product Sales
Revenues:
Revenues		286	377	[3]	707	1,001	[3]
Related Party | Sulfur services
Cost of products sold: (excluding depreciation and amortization)
Cost of products sold		2,884	2,492	[3]	5,458	5,340	[3]
Related Party | Terminalling and storage
Cost of products sold: (excluding depreciation and amortization)
Cost of products sold		$ 7,203	$ 7,089	[3]	$ 13,112	$ 12,668	[3]
[1]	Financial information for 2018 has been revised to include results attributable to MTI acquired from Martin Resource Management Corporation. See Note 1 – Nature of Operations and Basis of Presentation.
[2]	Related Party Transactions Included Above Three Months Ended Six Months Ended June 30, June 30, 2019 2018 1 2019 2018 1 Revenues:* Terminalling and storage $ 17,477 $ 20,485 $ 36,449 $ 40,493 Transportation 5,856 7,066 11,499 13,759 Product Sales 286 377 707 1,001 Costs and expenses:* Cost of products sold: (excluding depreciation and amortization) Sulfur services 2,884 2,492 5,458 5,340 Terminalling and storage 7,203 7,089 13,112 12,668 Expenses: Operating expenses 24,407 23,758 46,943 46,846 Selling, general and administrative 8,558 6,692 17,093 14,618
[3]	Financial information for 2018 has been revised to include results attributable to MTI acquired from Martin Resource Management Corporation. See Note 1 – Nature of Operations and Basis of Presentation.

CONSOLIDATED AND CONDENSED ST_4

CONSOLIDATED AND CONDENSED STATEMENTS OF CAPITAL - USD ($) $ in Thousands		3 Months Ended			6 Months Ended
		Jun. 30, 2019	Jun. 30, 2018		Jun. 30, 2019		Jun. 30, 2018
Increase (Decrease) in Partners' Capital [Roll Forward]
Beginning balance					$ 288,432	[1]	$ 322,481
Net income (loss)		$ (191,182)	$ (4,526)	[2]	(194,838)		10,510	[2],[3]
Issuance of common units, net					(259)		(118)
Issuance of restricted units					0		0
Forfeiture of restricted units					0		0
Cash distributions					(29,440)		(39,217)
Deemed contribution to Martin Resource Management Corporation							(8,857)
Unit-based compensation					715		520
Purchase of treasury units					(392)		(273)
Excess purchase price over carrying value of acquired assets					(102,393)		(26)
Deferred taxes on acquired assets and liabilities					24,781
Contribution to parent					(23,720)
Ending balance		(37,114)	285,020		(37,114)		285,020
Common Limited
Increase (Decrease) in Partners' Capital [Roll Forward]
Beginning balance					$ 258,085		$ 290,927
Beginning balance (in shares)					39,032,237		38,444,612
Net income (loss)					$ (190,941)		$ 5,461
Issuance of common units, net					$ (259)		$ (118)
Issuance of restricted units (in shares)					16,944		633,425
Issuance of restricted units					$ 0		$ 0
Forfeiture of restricted units (in shares)					(154,288)		(7,000)
Forfeiture of restricted units					$ 0		$ 0
Cash distributions					(28,851)		(38,433)
Unit-based compensation					$ 715		$ 520
Purchase of treasury units (in shares)					(31,504)		(18,800)
Purchase of treasury units					$ (392)		$ (273)
Excess purchase price over carrying value of acquired assets					(102,393)		(26)
Deferred taxes on acquired assets and liabilities					24,781
Ending balance		$ (39,255)	$ 258,058		$ (39,255)		$ 258,058
Ending balance (in shares)		38,863,389	39,052,237		38,863,389		39,052,237
General Partner Amount
Increase (Decrease) in Partners' Capital [Roll Forward]
Beginning balance					$ 6,627		$ 7,314
Net income (loss)					(3,897)		111
Cash distributions					(589)		(784)
Ending balance		$ 2,141	$ 6,641		2,141		6,641
Parent Net Investment
Increase (Decrease) in Partners' Capital [Roll Forward]
Beginning balance					23,720		24,240	[4]
Net income (loss)	[4]						4,938
Deemed contribution to Martin Resource Management Corporation	[4]						(8,857)
Contribution to parent					(23,720)
Ending balance		$ 0	$ 20,321	[4]	$ 0		$ 20,321	[4]
[1]	Financial information for 2018 has been revised to include results attributable to MTI acquired from Martin Resource Management Corporation. See Note 1 – Nature of Operations and Basis of Presentation.
[2]	Financial information for 2018 has been revised to include results attributable to MTI acquired from Martin Resource Management Corporation. See Note 1 – Nature of Operations and Basis of Presentation.
[3]	Financial information for 2018 has been revised to include results attributable to MTI acquired from Martin Resource Management Corporation. See Note 1 – Nature of Operations and Basis of Presentation.
[4]	Financial information for 2018 has been revised to include results attributable to MTI acquired from Martin Resource Management Corporation. See Note 1 – Nature of Operations and Basis of Presentation.

CONSOLIDATED AND CONDENSED ST_5

CONSOLIDATED AND CONDENSED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	[2]
Cash flows from operating activities:
Net income (loss)	$ (194,838)	$ 10,510	[1]
Less: (Income) loss from discontinued operations, net of income taxes	179,466	(12,014)	[1]
Net loss from continuing operations	(15,372)	(1,504)	[1]
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation and amortization	29,988	32,258	[1]
Amortization of deferred debt issuance costs	2,478	1,689
Amortization of premium on notes payable	(153)	(153)
Deferred taxes	856	0
Loss on sale of property, plant and equipment	2,353	198
Derivative loss (gain)	2,322	(2,069)
Net cash received (paid) for commodity derivatives	(249)	2,569
Unit-based compensation	715	520
Change in current assets and liabilities, excluding effects of acquisitions and dispositions:
Accounts and other receivables	28,073	44,772
Product exchange receivables	59	(145)
Inventories	3,044	(15,482)
Due from affiliates	(15,947)	3,241
Other current assets	(3,061)	60
Trade and other accounts payable	(2,800)	(16,155)
Product exchange payables	(4,386)	1,196
Due to affiliates	428	(495)
Income taxes payable	131	(103)
Other accrued liabilities	(3,043)	(6,158)
Change in other non-current assets and liabilities	(693)	931
Net cash provided by continuing operating activities	24,743	45,170
Net cash provided by discontinued operating activities	7,770	23,999
Net cash provided by operating activities	32,513	69,169
Cash flows from investing activities:
Payments for property, plant and equipment	(14,102)	(22,450)
Acquisitions	(23,720)	0
Payments for plant turnaround costs	(4,742)	0
Proceeds from sale of property, plant and equipment	659	500
Net cash used in continuing investing activities	(41,905)	(21,950)
Net cash provided by (used in) discontinued investing activities	209,155	(15,139)
Net cash provided by (used in) investing activities	167,250	(37,089)
Cash flows from financing activities:
Payments of long-term debt and finance lease obligations	(362,672)	(199,765)
Proceeds from long-term debt	298,000	218,000
Proceeds from issuance of common units, net of issuance related costs	(259)	(118)
Purchase of treasury units	(392)	(273)
Deemed distribution to Martin Resource Management Corporation	0	(8,857)
Payment of debt issuance costs	(386)	(1,240)
Excess purchase price over carrying value of acquired assets	(102,393)	(26)
Cash distributions paid	(29,440)	(39,217)
Net cash used in financing activities	(197,542)	(31,496)
Net increase in cash	2,221	584
Cash at beginning of period	300	89
Cash at end of period	2,521	673
Non-cash additions to property, plant and equipment	$ 2,248	$ 1,811
[1]	Financial information for 2018 has been revised to include results attributable to MTI acquired from Martin Resource Management Corporation. See Note 1 – Nature of Operations and Basis of Presentation.
[2]	Financial information for 2018 has been revised to include results attributable to MTI acquired from Martin Resource Management Corporation. See Note 1 – Nature of Operations and Basis of Presentation.

Nature of Operations and Basis

Nature of Operations and Basis of Presentation	6 Months Ended
	Jun. 30, 2019
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 United States ("U.S.") Gulf Coast region. 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 natural gas liquids 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, 2018, filed with the Securities and Exchange Commission (the "SEC") on February 19, 2019. On May 21, 2019, Part II, Items 6, 7, and 8 of the Partnership's Form 10-K for the year ended December 31, 2018, filed with the SEC on February 19, 2019, was updated on Form 8-K/A to reflect the acquisition of Martin Transport, Inc. ("MTI") as if the Partnership owned these assets for the periods presented. See below "Acquisition of Martin Transport, Inc." within this Note 1 for more information. 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. Divestiture of Natural Gas Storage Assets. On June 28, 2019, the Partnership completed the sale of its membership interests in Arcadia Gas Storage, LLC, Cadeville Gas Storage LLC, Monroe Gas Storage Company, LLC and Perryville Gas Storage LLC (the “Natural Gas Storage Assets”) to Hartree Cardinal Gas, LLC ("Hartree"), a subsidiary of Hartree Bulk Storage, LLC. The Natural Gas Storage Assets consist of approximately 50 billion cubic feet of working capacity located in northern Louisiana and Mississippi. In consideration of the sale of the Natural Gas Storage Assets, the Partnership received cash proceeds of $210,067 after transaction fees and expenses, subject to final post closing adjustments. The net proceeds were used to reduce outstanding borrowings under the Partnership's revolving credit facility. The Partnership has concluded the disposition represents a strategic shift and will have a major effect on its financial results going forward. As a result, the Partnership has presented the results of operations and cash flows relating to the Natural Gas Storage Assets as discontinued operations for the three and six months ended June 30, 2019 and 2018. See Note 4 for more information. Acquisition of Martin Transport, Inc. On January 2, 2019, the Partnership acquired all of the issued and outstanding equity interests of MTI from Martin Resource Management Corporation. MTI operates a fleet of tank trucks providing transportation of petroleum products, liquid petroleum gas, chemicals, sulfur and other products, as well as owns 23 terminals located throughout the Gulf Coast and Southeastern regions of the United States. The acquisition of MTI was considered a transfer of net assets between entities under common control. As a result, the acquisition of MTI was recorded at amounts based on the historical carrying value of these assets at January 1, 2019, and the Partnership is required to update its historical financial statements to include the activities of MTI as of the date of common control. See Note 3 for more information. The Partnership’s accompanying historical financial statements have been retrospectively updated to reflect the effects on financial position, cash flows and results of operations attributable to the activities of MTI as if the Partnership owned these assets for the periods presented. See Note 3 for separate results of MTI for the three and six months ended June 30, 2018. Net income attributable to MTI for periods prior to the Partnership’s acquisition of the assets is not allocated to the limited partners for purposes of calculating net income per limited partner unit. See Note 12. Divestiture of WTLPG Partnership Interest. On July 31, 2018, the Partnership completed the sale of its 20 percent non-operating interest in West Texas LPG Pipeline L.P. ("WTLPG") to ONEOK, Inc. (“ONEOK”). WTLPG owns an approximate 2,300

New Accounting Pronouncements

New Accounting Pronouncements	6 Months Ended
	Jun. 30, 2019
Accounting Changes and Error Corrections [Abstract]
New Accounting Pronouncements	NEW ACCOUNTING PRONOUNCEMENTS In June 2018, the FASB issued ASU 2018-07, Compensation - Stock Compensation: Improvements to Non-employee Share-Based Payment Accounting, which will expand the scope of Topic 718 to include share-based payment transactions for acquiring goods and services from non-employees. The standard is effective for Partnership's financial statements issued for fiscal years beginning after December 15, 2018, and interim periods within those fiscal years. The Partnership adopted this standard effective January 1, 2019. The result of this adoption did not have a material impact on the Partnership's consolidated and condensed financial statements. In February 2016, the FASB issued ASU 2016-02, Leases , which introduces the recognition of lease assets and lease liabilities by lessees for those leases classified as operating leases under previous guidance. Lessor accounting under the new standard is substantially unchanged and the Partnership believes substantially all of our leases will continue to be classified as operating leases under the new standard. Additional qualitative and quantitative disclosures, including significant judgments made by management, will be required. The update is effective for annual reporting periods beginning after December 15, 2018, including interim periods within those reporting periods, with early adoption permitted. The original guidance required application on a modified retrospective basis with the earliest period presented. In August 2018, the FASB issued ASU 2018-11, Targeted Improvements to Financial Accounting Standards Board ("FASB") Accounting Standards Codification ("ASC") 842 , which includes an option to not restate comparative periods in transition and elect to use the effective date of ASC 842, Leases, as the date of initial application of transition. The Partnership adopted this ASU on January 1, 2019, electing the transition option provided under ASU 2018-11. Consequently, financial information was not updated and the disclosures required under the new standard are not provided for dates and periods before January 1, 2019. The new standard provides a number of optional practical expedients in transition. The Partnership elected the "package of practical expedients", which permits the Partnership not to reassess under the new standard our prior conclusions about lease identification, lease classification and initial direct costs. The new standard also provides practical expedients for an entity’s ongoing accounting. The Partnership elected the short-term lease recognition exemption for all leases that qualify. This means, for those assets that qualify, the Partnership did not recognize Right-of-Use ("ROU") assets or lease liabilities, and this includes not recognizing ROU assets or lease liabilities for existing short-term leases of those assets in transition. See Note 9 for more information.

Acquisitions

Acquisitions	6 Months Ended
	Jun. 30, 2019
Business Combinations [Abstract]
Acquisitions	ACQUISITIONS Martin Transport, Inc. Stock Purchase Agreement. On January 2, 2019, the Partnership acquired all of the issued and outstanding equity interests of MTI, a wholly-owned subsidiary of Martin Resource Management Corporation which operates a fleet of tank trucks providing transportation of petroleum products, liquid petroleum gas, chemicals, sulfur and other products, as well as owns 23 terminals located throughout the Gulf Coast and Southeastern regions of the United States for total consideration as follows: Purchase price 1 $ 135,000 Plus: Working Capital Adjustment 2,795 Less: Finance lease obligations assumed (11,682 ) Cash consideration paid $ 126,113 1 The stock purchase agreement also includes a $10,000 earn-out based on certain performance thresholds. The transaction closed on January 2, 2019 and was effective as of January 1, 2019 and was funded with borrowings under the Partnership's revolving credit facility. This acquisition is considered a transfer of net assets between entities under common control. The acquisition of MTI was recorded at the historical carrying value of the assets at the acquisition date, which were as follows: Accounts receivable, net $ 11,724 Inventories 1,138 Due from affiliates 1,042 Other current assets 897 Property, plant and equipment, net 25,383 Goodwill 489 Other noncurrent assets 362 Current installments of finance lease obligations (5,409 ) Accounts payable (2,564 ) Due to affiliates (482 ) Other accrued liabilities (2,588 ) Finance lease obligations, net of current installments (6,272 ) Historical carrying value of assets acquired $ 23,720 The excess purchase price over the historical carrying value of the assets at the acquisition date was $102,393 and was recorded as an adjustment to "Partners' capital". The separate results of operations related to MTI for the three and six months ended June 30, 2018 which were recast as part of the Partnership's consolidated and condensed statements of operations were as follows: Three Months Ended June 30, 2018 Six Months Ended June 30, 2018 Transportation revenue $ 30,385 $ 60,294 Operating expenses 25,681 51,217 Selling, general and administrative 1,364 2,704 Depreciation and amortization 739 1,519 Total costs and expenses 27,784 55,440 Other operating income, net 164 174 Operating income 2,765 5,028 Other income: Interest expense (49 ) (94 ) Other, net 4 4 Income before income taxes 2,720 4,938 Income taxes — — Net income $ 2,720 $ 4,938

Divestitures and Discontinued O

Divestitures and Discontinued Operations	6 Months Ended
	Jun. 30, 2019
Discontinued Operations and Disposal Groups [Abstract]
Divestitures and Discontinued Operations	DIVESTITURES AND DISCONTINUED OPERATIONS Discontinued Operations Divestiture of Natural Gas Storage Assets. On June 28, 2019, the Partnership completed the sale of the Natural Gas Storage Assets to Hartree, a subsidiary of Hartree Bulk Storage, LLC. The Natural Gas Storage Assets consist of approximately 50 billion cubic feet of working capacity located in northern Louisiana and Mississippi. In consideration of the sale of these assets, the Partnership received cash proceeds of $210,067 after transaction fees and expenses, subject to final post closing adjustments. The net proceeds were used to reduce outstanding borrowings under the Partnership's revolving credit facility. The Partnership has concluded the disposition represents a strategic shift and will have a major effect on its financial results going forward. As a result, the Partnership has presented the results of operations and cash flows relating to the Natural Gas Storage Assets as discontinued operations for the three and six months ended June 30, 2019 and 2018. The operating results, which are included in income (loss) from discontinued operations, were as follows: Three Months Ended June 30, Six Months Ended June 30, 2019 2018 2019 2018 Total revenues $ 11,902 $ 13,804 $ 22,836 $ 29,160 Total costs and expenses and other, net, excluding depreciation and amortization (9,609 ) (5,110 ) (15,360 ) (10,233 ) Depreciation and amortization (4,080 ) (4,684 ) (8,161 ) (9,362 ) Other operating income 1 (178,781 ) (120 ) (178,781 ) (120 ) Income (loss) from discontinued operations before income taxes (180,568 ) 3,890 (179,466 ) 9,445 Income tax expense — — — — Income (loss) from discontinued operations, net of income taxes $ (180,568 ) $ 3,890 $ (179,466 ) $ 9,445 1 The three and six months ended June 30, 2019 includes a loss on the disposition of the Natural Gas Storage Assets of $178,781 . As the disposition of the Natural Gas Storage Assets was completed prior to meeting the criteria in ASC 210-20-14 to be classified as held for sale, the Partnership has adjusted the Balance Sheet as of December 31, 2018 to present separately the assets and liabilities of the Natural Gas Storage Assets. See table below for more information. December 31, 2018 Accounts and other receivables $ 7,269 Inventories 1,942 Other current assets 217 Current assets - Natural Gas Storage Assets $ 9,428 Property, plant and equipment, at cost $ 425,138 Accumulated depreciation (49,238 ) Intangibles and other assets, net 19,489 Non-current assets - Natural Gas Storage Assets $ 395,389 Trade and other accounts payable $ 1,682 Product exchange payable 1,134 Due to affiliates 2 Other accrued liabilities 422 Current liabilities - Natural Gas Storage Assets $ 3,240 Other long-term obligations $ 669 Non-current liabilities - Natural Gas Storage Assets $ 669 Divestiture of WTLPG Partnership Interest. On July 31, 2018, the Partnership completed the sale of its 20 percent non-operating interest in WTLPG to ONEOK. WTLPG owns an approximate 2,300 mile common-carrier pipeline system that primarily transports NGLs from New Mexico and Texas to Mont Belvieu, Texas for fractionation. A wholly-owned subsidiary of ONEOK, Inc. is the operator of the assets. In consideration for the sale of the Natural Gas Storage Assets, the Partnership received cash proceeds of $193,705 , after transaction fees and expenses. The proceeds from the sale were used to reduce outstanding borrowings under the Partnership's revolving credit facility. The Partnership has concluded the disposition represents a strategic shift and will have a major effect on its financial results going forward. As a result, the Partnership has presented the results of operations and cash flows relating to its equity method investment in WTLPG as discontinued operations for the three and six months ended June 30, 2018. The operating results, which are included in income from discontinued operations, were as follows: Three Months Ended June 30, 2018 Six Months Ended June 30, 2018 Total costs and expenses and other, net, excluding depreciation and amortization 1 $ (94 ) $ (157 ) Equity in earnings 1,131 2,726 Income from discontinued operations before income taxes 1,037 2,569 Income tax expense — — Income from discontinued operations, net of income taxes $ 1,037 $ 2,569 1 These expenses represent direct operating expenses as a result of the Partnership's ownership interest in WTLPG. Long-Lived Assets Held for Sale At June 30, 2019 and December 31, 2018, certain terminalling and storage and marine transportation assets met the criteria to be classified as held for sale in accordance with ASC 360-10 and are presented at the lower of the assets' carrying amount or fair value less cost to sell by segment in current assets as follows: June 30, 2019 December 31, 2018 Terminalling and storage $ 3,552 $ 3,552 Transportation 1,580 2,100 Assets held for sale $ 5,132 $ 5,652 These assets are considered non-core assets to the Partnership's operations and did not qualify for discontinued operations presentation under the guidance of ASC 205-20.

Revenue

Revenue	6 Months Ended
	Jun. 30, 2019
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, 2019 2018 2019 2018 Terminalling and storage segment Lubricant product sales $ 31,371 $ 36,794 $ 62,438 $ 73,257 Throughput and storage 21,377 24,068 44,481 48,115 $ 52,748 $ 60,862 $ 106,919 $ 121,372 Natural gas liquids segment Natural gas liquids product sales $ 57,398 $ 90,625 $ 173,872 $ 249,787 $ 57,398 $ 90,625 $ 173,872 $ 249,787 Sulfur services segment Sulfur product sales $ 8,204 $ 10,479 $ 18,156 $ 22,316 Fertilizer product sales 24,794 25,205 43,576 48,268 Sulfur services 2,858 2,787 5,717 5,574 $ 35,856 $ 38,471 $ 67,449 $ 76,158 Transportation segment Land transportation $ 25,497 $ 24,467 $ 49,616 $ 47,372 Inland transportation 14,188 11,206 26,665 20,898 Offshore transportation 1,636 1,533 2,835 3,295 $ 41,321 $ 37,206 $ 79,116 $ 71,565 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 transfered, 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. Natural Gas Liquids Segment Natural Gas Liquids ("NGL") distribution 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 are 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 are 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 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. 2019 2020 2021 2022 2023 Thereafter Total Terminalling and storage Throughput and storage $ 25,189 $ 49,355 $ 46,642 $ 42,735 $ 42,854 $ 392,624 $ 599,399 Sulfur services Sulfur product sales 8,541 4,898 1,181 295 — — 14,915 Transportation Offshore transportation 3,128 — — — — — 3,128 Total $ 36,858 $ 54,253 $ 47,823 $ 43,030 $ 42,854 $ 392,624 $ 617,442

Inventories

Inventories	6 Months Ended
	Jun. 30, 2019
Inventory Disclosure [Abstract]
Inventories	INVENTORIES Components of inventories at June 30, 2019 and December 31, 2018 were as follows: June 30, 2019 December 31, 2018 Natural gas liquids $ 35,909 $ 30,446 Sulfur 7,648 12,818 Fertilizer 11,749 14,208 Lubricants 21,817 22,887 Other 4,097 3,906 $ 81,220 $ 84,265

Investment in West Texas LPG Pi

Investment in West Texas LPG Pipeline L.P.	6 Months Ended
	Jun. 30, 2019
Equity Method Investments and Joint Ventures [Abstract]
Investment in West Texas LPG Pipeline L.P.	INVESTMENT IN WEST TEXAS LPG PIPELINE L.P. As discussed in Note 4, on July 31, 2018, the Partnership completed the sale of its 20% non-operating interest in WTLPG. Prior to the sale, the Partnership owned a 19.8% limited partnership and 0.2% general partnership interest in WTLPG. A wholly-owned subsidiary of ONEOK is the operator of the assets. WTLPG owns an approximate 2,300 mile common-carrier pipeline system that primarily transports NGLs from New Mexico and Texas to Mont Belvieu, Texas for fractionation. The Partnership recognized its 20% interest in WTLPG as "Investment in WTLPG" on its Consolidated and Condensed Balance Sheets. The Partnership accounted for its ownership interest in WTLPG under the equity method of accounting. As discussed in Note 4, the Partnership sold its 20% non-operating partnership interest to ONEOK on July 31, 2018. Selected financial information for WTLPG during the period of ownership is as follows: Three Months Ended June 30, Six Months Ended June 30, 2018 Revenues Net Income Revenues Net Income WTLPG $ 23,390 $ 5,653 $ 46,431 $ 13,359

Long-Term Debt

Long-Term Debt	6 Months Ended
	Jun. 30, 2019
Debt Disclosure [Abstract]
Long-Term Debt	LONG-TERM DEBT At June 30, 2019 and December 31, 2018 , long-term debt consisted of the following: June 30, December 31, $500,000 Revolving credit facility at variable interest rate (5.65% 1 weighted average at June 30, 2019), due March 2020 4 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 and equity method investees, net of unamortized debt issuance costs of $1,787 and $3,537, respectively 2 $ 223,213 $ 283,463 $400,000 Senior notes, 7.25% interest, net of unamortized debt issuance costs of $1,112 and $1,454, respectively, including unamortized premium of $497 and $650, respectively, issued $250,000 February 2013 and $150,000 April 2014, $26,200 repurchased during 2015, due February 2021, unsecured 2,3 373,185 372,996 Total 596,398 656,459 Less: current portion — — Total long-term debt, net of current portion $ 596,398 $ 656,459 1 Interest rate fluctuates based on the LIBOR rate plus an applicable margin set on the date of each advance. The margin above LIBOR is set every three months. Indebtedness under the credit facility bears interest at LIBOR plus an applicable margin or the base prime rate plus an applicable margin. All amounts outstanding at June 30, 2019 and December 31, 2018 were at LIBOR plus an applicable margin. The applicable margin for revolving loans that are LIBOR loans ranges from 2.00% to 3.25% and the applicable margin for revolving loans that are base prime rate loans ranges from 1.00% to 2.25% . The applicable margin for existing LIBOR borrowings at June 30, 2019 is 3.25% . The credit facility contains various covenants which limit the Partnership’s ability to 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 Partnership is permitted to make quarterly distributions so long as no event of default exists. 2 The Partnership is in compliance with all debt covenants as of June 30, 2019 and December 31, 2018 , respectively. 3 The 2021 indenture restricts 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 July 18, 2019, the Partnership amended its revolving credit facility to, among other things, extend the maturity date from March 2020 to August 2023 and reduce commitments from $500,000 to $400,000 . The Partnership paid cash interest, net of capitalized interest, in the amount of $7,330 and $6,077 for the three months ended June 30, 2019 and 2018, respectively. The Partnership paid cash interest, net of capitalized interest, in the amount of $26,693 and $24,955 for the six months ended June 30, 2019 and 2018, respectively. Capitalized interest was $0 and $167 for the three months ended June 30, 2019 and 2018, respectively. Capitalized interest was $2 and $328 for the six months ended June 30, 2019

Leases

Leases	6 Months Ended
	Jun. 30, 2019
Leases [Abstract]
Leases	LEASES In February 2016, the FASB issued ASU 2016-02, Leases , which introduces the recognition of lease assets and lease liabilities by lessees for those leases classified as operating leases under previous guidance. In August 2018, the FASB issued ASU 2018-11, Targeted Improvements to ASC 842 , which includes an option to not restate comparative periods in transition and elect to use the effective date of ASC 842, Leases, as the date of initial application of transition. The Partnership elected the effective date transition method in ASC 842 and adopted the standard beginning January 1, 2019. The new standard provides a number of optional practical expedients in transition. The Partnership elected the "package of practical expedients", which permits the Partnership not to reassess under the new standard our prior conclusions about lease identification, lease classification and initial direct costs. The Partnership also elected the short-term lease recognition exemption, meaning the Partnership does not recognize ROU assets or lease liabilities for all leases that qualify. Lease agreements with lease and non-lease components are combined as a single lease component. Variable lease payments are generally expensed as incurred and include certain index-based changes in rent, certain non-lease components, such as maintenance and other services provided by the lessor, and other charges included in the lease. The adoption of this standard resulted in the recording of approximately $19,047 of additional assets and liabilities on its Consolidated Balance Sheet as of January 1, 2019. The Partnership also acquired certain operating leases in the MTI transaction that resulted in additional assets and liabilities being recorded at the transaction date in accordance with ASU 2016-02 in the amount of $6,505 . 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. Our leases have remaining lease terms of 1 year to 17 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 Partnership's future minimum lease obligations as of December 31, 2018 consisted of the following: Operating Leases Finance Leases Year 1 $ 13,126 $ 6,022 Year 2 7,194 6,068 Year 3 4,262 223 Year 4 2,642 260 Year 5 1,749 — Thereafter 7,823 — Total $ 36,796 12,573 Less amounts representing interest costs (892 ) Present value of net minimum capital lease payments 11,681 Less current portion (5,409 ) Present value of net minimum capital lease payments, excluding current portion $ 6,272 The components of lease expense for the three months and six months ended June 30, 2019 were as follows: Three Months Ended June 30, 2019 Six Months Ended June 30, 2019 Operating lease cost $ 5,363 $ 10,653 Finance lease cost: Amortization of right-of-use assets $ 688 $ 1,310 Interest on lease liabilities 185 368 Total finance lease cost $ 873 $ 1,678 Supplemental cash flow information for the six months ended June 30, 2019 related to leases was as follows: June 30, 2019 Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating leases $ 10,631 Operating cash flows from finance leases 368 Financing cash flows from finance leases 2,672 Right-of-use assets obtained in exchange for lease obligations: Operating leases $ 5,317 Finance leases 1,309 Supplemental balance sheet information related to leases was as follows: June 30, 2019 Operating Leases Operating lease right-of-use assets $ 25,682 Current portion of operating lease liabilities included in "Other accrued liabilities" $ 8,141 Operating lease liabilities 17,913 Total operating lease liabilities $ 26,054 Finance Leases Property, plant and equipment, at cost $ 15,367 Accumulated depreciation (2,576 ) Property, plant and equipment, net $ 12,791 Current portion finance lease obligations $ 6,059 Finance lease obligations 4,259 Total finance lease obligations $ 10,318 Weighted Average Remaining Lease Term (years) Operating leases 6.33 Finance leases 1.39 Weighted Average Discount Rate Operating leases 5.26 % Finance leases 6.89 % The Partnership’s future minimum lease obligations as of June 30, 2019 consist of the following: Operating Leases Finance Leases Year 1 $ 9,351 $ 6,558 Year 2 6,426 4,015 Year 3 4,196 223 Year 4 2,594 149 Year 5 1,393 — Thereafter 7,330 — Total $ 31,290 $ 10,945 Less amounts representing interest costs (5,236 ) (627 ) Total lease liability $ 26,054 $ 10,318 As of June 30, 2019, we have additional operating leases, primarily for railcars, that have not yet commenced of $2,003 . These operating leases will commence during the third quarter of 2019 with lease terms of 3 - 5 years. Rent expense for continuing operating leases for the three and six months ended June 30, 2018 was $5,869 and $12,235 , respectively. Lessor accounting under the new standard is substantially unchanged and all of the Partnership's leases will continue to be classified as operating leases under the new standard. 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, 2019 , are as follows: 2019 - $11,003 ; 2020 - $15,434 ; 2021 - $11,986 ; 2022 - $10,971 ; 2023 - $10,576 ; subsequent years - $58,128 .
Leases	LEASES In February 2016, the FASB issued ASU 2016-02, Leases , which introduces the recognition of lease assets and lease liabilities by lessees for those leases classified as operating leases under previous guidance. In August 2018, the FASB issued ASU 2018-11, Targeted Improvements to ASC 842 , which includes an option to not restate comparative periods in transition and elect to use the effective date of ASC 842, Leases, as the date of initial application of transition. The Partnership elected the effective date transition method in ASC 842 and adopted the standard beginning January 1, 2019. The new standard provides a number of optional practical expedients in transition. The Partnership elected the "package of practical expedients", which permits the Partnership not to reassess under the new standard our prior conclusions about lease identification, lease classification and initial direct costs. The Partnership also elected the short-term lease recognition exemption, meaning the Partnership does not recognize ROU assets or lease liabilities for all leases that qualify. Lease agreements with lease and non-lease components are combined as a single lease component. Variable lease payments are generally expensed as incurred and include certain index-based changes in rent, certain non-lease components, such as maintenance and other services provided by the lessor, and other charges included in the lease. The adoption of this standard resulted in the recording of approximately $19,047 of additional assets and liabilities on its Consolidated Balance Sheet as of January 1, 2019. The Partnership also acquired certain operating leases in the MTI transaction that resulted in additional assets and liabilities being recorded at the transaction date in accordance with ASU 2016-02 in the amount of $6,505 . 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. Our leases have remaining lease terms of 1 year to 17 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 Partnership's future minimum lease obligations as of December 31, 2018 consisted of the following: Operating Leases Finance Leases Year 1 $ 13,126 $ 6,022 Year 2 7,194 6,068 Year 3 4,262 223 Year 4 2,642 260 Year 5 1,749 — Thereafter 7,823 — Total $ 36,796 12,573 Less amounts representing interest costs (892 ) Present value of net minimum capital lease payments 11,681 Less current portion (5,409 ) Present value of net minimum capital lease payments, excluding current portion $ 6,272 The components of lease expense for the three months and six months ended June 30, 2019 were as follows: Three Months Ended June 30, 2019 Six Months Ended June 30, 2019 Operating lease cost $ 5,363 $ 10,653 Finance lease cost: Amortization of right-of-use assets $ 688 $ 1,310 Interest on lease liabilities 185 368 Total finance lease cost $ 873 $ 1,678 Supplemental cash flow information for the six months ended June 30, 2019 related to leases was as follows: June 30, 2019 Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating leases $ 10,631 Operating cash flows from finance leases 368 Financing cash flows from finance leases 2,672 Right-of-use assets obtained in exchange for lease obligations: Operating leases $ 5,317 Finance leases 1,309 Supplemental balance sheet information related to leases was as follows: June 30, 2019 Operating Leases Operating lease right-of-use assets $ 25,682 Current portion of operating lease liabilities included in "Other accrued liabilities" $ 8,141 Operating lease liabilities 17,913 Total operating lease liabilities $ 26,054 Finance Leases Property, plant and equipment, at cost $ 15,367 Accumulated depreciation (2,576 ) Property, plant and equipment, net $ 12,791 Current portion finance lease obligations $ 6,059 Finance lease obligations 4,259 Total finance lease obligations $ 10,318 Weighted Average Remaining Lease Term (years) Operating leases 6.33 Finance leases 1.39 Weighted Average Discount Rate Operating leases 5.26 % Finance leases 6.89 % The Partnership’s future minimum lease obligations as of June 30, 2019 consist of the following: Operating Leases Finance Leases Year 1 $ 9,351 $ 6,558 Year 2 6,426 4,015 Year 3 4,196 223 Year 4 2,594 149 Year 5 1,393 — Thereafter 7,330 — Total $ 31,290 $ 10,945 Less amounts representing interest costs (5,236 ) (627 ) Total lease liability $ 26,054 $ 10,318 As of June 30, 2019, we have additional operating leases, primarily for railcars, that have not yet commenced of $2,003 . These operating leases will commence during the third quarter of 2019 with lease terms of 3 - 5 years. Rent expense for continuing operating leases for the three and six months ended June 30, 2018 was $5,869 and $12,235 , respectively. Lessor accounting under the new standard is substantially unchanged and all of the Partnership's leases will continue to be classified as operating leases under the new standard. 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, 2019 , are as follows: 2019 - $11,003 ; 2020 - $15,434 ; 2021 - $11,986 ; 2022 - $10,971 ; 2023 - $10,576 ; subsequent years - $58,128 .

Supplemental Balance Sheet Info

Supplemental Balance Sheet Information	6 Months Ended
	Jun. 30, 2019
Balance Sheet Related Disclosures [Abstract]
Supplemental Balance Sheet Information	SUPPLEMENTAL BALANCE SHEET INFORMATION Components of "Other accrued liabilities" were as follows: June 30, 2019 December 31, 2018 Accrued interest $ 10,467 $ 10,735 Asset retirement obligations — 2,721 Property and other taxes payable 4,523 5,751 Accrued payroll 3,703 3,110 Operating lease liabilities 8,141 — Other 2,326 2,063 $ 29,160 $ 24,380 The schedule below summarizes the changes in our asset retirement obligations: June 30, 2019 Beginning asset retirement obligations $ 12,429 Accretion expense 218 Liabilities settled (3,900 ) Ending asset retirement obligations 8,747 Current portion of asset retirement obligations 1 — Long-term portion of asset retirement obligations 2 $ 8,747 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, 2019
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Instruments and Hedging Activities	DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES The Partnership’s revenues and cost of products sold are materially impacted by changes in NGL prices. Additionally, the Partnership's results of operations are materially impacted by changes in 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. All derivatives and hedging instruments are non-hedge derivatives and are included on the balance sheet as an asset or a liability measured at fair value and changes in fair value are recognized as gains and losses in 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 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 has entered into hedging transactions as of June 30, 2019 to protect a portion of its commodity price risk exposure. These hedging arrangements are in the form of swaps for NGLs. At June 30, 2019, the Partnership has instruments totaling a gross notional quantity of 370,000 barrels settling during the period from July 1, 2019 through September 30, 2019. At December 31, 2018, the Partnership had instruments totaling a gross notional quantity of 55,000 barrels settling during the period from January 31, 2019 through February 28, 2019. These instruments settle against the applicable pricing source for each grade and location. (b) Interest Rate Derivative Instruments The Partnership is exposed to market risks associated with interest rates. Market risk is the adverse effect on the value of a financial instrument that results from a change in interest rates. We minimize this market risk by establishing and monitoring parameters that limit the types and degree of market risk that may be undertaken. From time to time, the Partnership enters into interest rate swaps to manage interest rate risk associated with the Partnership’s variable rate credit facility and its fixed rate senior unsecured notes. At June 30, 2019 and 2018, the Partnership did not have any outstanding interest rate derivative instruments. For information regarding gains and losses on interest rate derivative instruments, see "Tabular Presentation of Gains and Losses on Derivative Instruments" below. (c) 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: Fair Values of Derivative Instruments in the Consolidated and Condensed Balance Sheets Derivative Assets Derivative Liabilities Fair Values Fair Values Balance Sheet Location June 30, 2019 December 31, 2018 Balance Sheet Location June 30, 2019 December 31, 2018 Derivatives not designated as hedging instruments: Current: Commodity contracts Fair value of derivatives $ — $ 4 Fair value of derivatives $ 2,069 $ — Total derivatives not designated as hedging instruments $ — $ 4 $ 2,069 $ — Effect of Derivative Instruments on the Consolidated and Condensed Statements of Operations For the Three Months Ended June 30, 2019 and 2018 Location of Gain (Loss) Recognized in Income on Derivatives Amount of Gain (Loss) Recognized in Income on Derivatives 2019 2018 Derivatives not designated as hedging instruments: Commodity contracts Cost of products sold $ (2,083 ) $ (401 ) Total effect of derivatives not designated as hedging instruments $ (2,083 ) $ (401 ) Effect of Derivative Instruments on the Consolidated and Condensed Statements of Operations For the Six Months Ended June 30, 2019 and 2018 Location of Gain (Loss) Recognized in Income on Derivatives Amount of Gain (Loss) Recognized in Income on Derivatives 2019 2018 Derivatives not designated as hedging instruments: Commodity contracts Cost of products sold $ (2,322 ) $ 2,069 Total effect of derivatives not designated as hedging instruments $ (2,322 ) $ 2,069

Partners' Capital

Partners' Capital	6 Months Ended
	Jun. 30, 2019
Partners' Capital Notes [Abstract]
Partners' Capital	PARTNERS' CAPITAL As of June 30, 2019 , Partners’ capital consisted of 38,863,389 common limited partner units, representing a 98% partnership interest, and a 2% general partner interest. Martin Resource Management Corporation, through subsidiaries, owns 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. Martin Resource Management Corporation controls the Partnership's general partner, by virtue of its 51% voting interest in MMGP Holdings, LLC ("Holdings"), the sole member of the Partnership's general partner. 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. Incentive Distribution Rights MMGP holds a 2% general partner interest and 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. The Partnership is required to distribute all of its available cash from operating surplus, as defined in the Partnership Agreement. The general partner was allocated no incentive distributions during the six months ended June 30, 2019 and 2018. The target distribution levels entitle the general partner to receive 2% of quarterly cash distributions from the minimum of $0.50 per unit up to $0.55 per unit, 15% of quarterly cash distributions in excess of $0.55 per unit until all unitholders have received $0.625 per unit, 25% of quarterly cash distributions in excess of $0.625 per unit until all unitholders have received $0.75 per unit and 50% of quarterly cash distributions in excess of $0.75 per unit. 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. Distributions to the general partner pursuant to the IDRs are limited to available cash that will be distributed as defined in the Partnership Agreement. Accordingly, the Partnership does not allocate undistributed earnings to the general partner for the IDRs because the general partner's share of available cash is the maximum amount that the general partner would be contractually entitled to receive if all earnings for the period were distributed. 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 from continuing operations and net income from discontinued operations 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, 2019 2018 2019 2018 Continuing operations: Loss from continuing operations $ (10,614 ) $ (9,453 ) $ (15,372 ) $ (1,504 ) Less pre-acquisition income allocated to the general partner — (2,720 ) — (4,938 ) Less general partner’s interest in net income (loss): Distributions payable on behalf of general partner interest 11 819 31 (112 ) General partner interest in undistributed loss (223 ) (1,122 ) (338 ) 96 Less loss allocable to unvested restricted units (4 ) (13 ) (5 ) — Limited partners’ interest in net loss $ (10,398 ) $ (11,857 ) $ (15,060 ) $ (6,426 ) Three Months Ended June 30, Six Months Ended June 30, 2019 2018 2019 2018 Discontinued operations: Income (loss) from discontinued operations $ (180,568 ) $ 4,927 $ (179,466 ) $ 12,014 Less general partner’s interest in net income (loss): Distributions payable on behalf of general partner interest 185 (427 ) 362 896 General partner interest in undistributed loss (3,797 ) 585 (3,952 ) (769 ) Less income (loss) allocable to unvested restricted units (61 ) 7 (62 ) 2 Limited partners’ interest in net income (loss) $ (176,895 ) $ 4,762 $ (175,814 ) $ 11,885 The Partnership allocates the general partner's share of earnings between continuing and discontinued operations as a proportion of net income from continuing and discontinued operations to total net income. 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, 2019 2018 2019 2018 Basic weighted average limited partner units outstanding 38,871,420 38,722,037 38,912,250 38,828,845 Dilutive effect of restricted units issued — — — 5,576 Total weighted average limited partner diluted units outstanding 38,871,420 38,722,037 38,912,250 38,834,421 All outstanding units were included in the computation of diluted earnings per unit and weighted based on the number of days such units were outstanding during the periods presented. All common unit equivalents were antidilutive for the three and six months ended June 30, 2019 and the three months ended June 30, 2018 because the limited partners were allocated a net loss in this period.

Unit Based Awards

Unit Based Awards	6 Months Ended
	Jun. 30, 2019
Share-based Payment Arrangement [Abstract]
Unit Based Awards	UNIT BASED AWARDS 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 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, 2019 2018 2019 2018 Employees $ 300 $ 345 $ 629 $ 441 Non-employee directors 63 43 86 79 Total unit-based compensation expense $ 363 $ 388 $ 715 $ 520 All of the Partnership's outstanding awards at June 30, 2019 met the criteria to be treated under equity classification. Long-Term Incentive Plans The Partnership's general partner has a long-term incentive plan for employees and directors of the general partner and its affiliates who perform services for the Partnership. On May 26, 2017, the unitholders of the Partnership approved the Martin Midstream Partners L.P. 2017 Restricted Unit Plan (the "2017 LTIP"). The plan 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 plan is administered by the compensation committee of the general partner’s board of directors (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 plan containing such terms as the Compensation Committee shall determine under the plan. With respect to time-based restricted units ("TBRU's"), 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 "PBRU's"). 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. PBRU's are earned only upon our achievement of an objective performance measure for the performance period. PBRU's 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 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. On February 11, 2019, the Partnership issued 5,648 TBRU's to each of the Partnership's three independent directors under the 2017 LTIP. These restricted common units vest in equal installments of 1,412 units on January 24, 2020, 2021, 2022, and 2023. On March 1, 2018, the Partnership issued 301,550 TBRU's and 317,925 PBRU's to certain employees of Martin Resource Management Corporation. The TBRU's vest in equal installments over a three-year service period. The PBRU's will vest at the conclusion of a three-year performance period based on certain performance targets. In addition, the PBRU's awarded on March 1, 2018 that are achieved will only vest if the grantee is employed by Martin Resource Management Corporation on March 31, 2021. As of June 30, 2019 , the Partnership is unable to ascertain if certain performance conditions will be achieved and, as such, has not recognized compensation expense for the vesting of the units. The Partnership will record compensation expense for the vested portion of the units once the achievement of the performance condition is deemed probable. 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, 2019 is provided below: Number of Units Weighted Average Grant-Date Fair Value Per Unit Non-vested, beginning of period 624,125 $ 13.78 Granted (TBRU) 16,944 $ 12.45 Vested (107,762 ) $ 13.82 Forfeited (154,288 ) $ 13.90 Non-Vested, end of period 379,019 $ 13.91 Aggregate intrinsic value, end of period $ 2,706 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 six months ended June 30, 2019 and 2018 is provided below: Three Months Ended June 30, Six Months Ended June 30, 2019 2018 2019 2018 Aggregate intrinsic value of units vested $ — $ — $ 1,351 $ 1,188 Fair value of units vested — — 1,551 2,232 As of June 30, 2019 , there was $2,462 of unrecognized compensation cost related to non-vested restricted units. That cost is expected to be recognized over a weighted-average period of 2.01 years.

Related Party Transactions

Related Party Transactions	6 Months Ended
	Jun. 30, 2019
Related Party Transactions [Abstract]
Related Party Transactions	RELATED PARTY TRANSACTIONS As of June 30, 2019 , 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 51% voting interest in 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 and the Partnership’s IDRs. 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, 2019 , of approximately 15.7% of the Partnership’s outstanding limited partner 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 fuel oil, marine fuel and other liquids; ◦ providing marine bunkering and other shore-based marine services in Texas, Louisiana, Mississippi, Alabama, and Florida; ◦ operating a crude oil gathering business in Stephens, Arkansas; ◦ providing crude oil gathering, refining, 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; ◦ operating an engineering services company; ◦ supplying employees and services for the operation of the Partnership's business; and ◦ operating, solely for the Partnership's account, the asphalt facilities in Omaha, Nebraska, Port Neches, Texas, Hondo, Texas, and South Houston, Texas. • 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, 2019, through December 31, 2019, the Conflicts Committee approved an annual reimbursement amount for indirect expenses of $16,657 . The Partnership reimbursed Martin Resource Management Corporation for $4,164 and $4,104 of indirect expenses for the three months ended June 30, 2019 and 2018 , respectively. The Partnership reimbursed Martin Resource Management Corporation for $8,328 and $8,208 of indirect expenses for the six months ended June 30, 2019 and 2018 , 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 for 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. 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. These rates 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 January 1, 2017, October 1, 2017, and April 1, 2019 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. All of these fees (other than the fuel surcharge) are subject to escalation annually based upon the greater of 3% or the increase in the Consumer Price Index for a specified annual period. In addition, on the third, sixth and ninth anniversaries of the agreement, the parties can negotiate an upward or downward adjustment in the fees subject to their mutual agreement. Sulfuric Acid Sales Agency Agreement . The Partnership was previously a party to a third amended and restated sulfuric acid sales agency agreement dated August 2, 2017 but effective October 1, 2017, under which a successor in interest to the agreement from Martin Resource Management Corporation, Saconix LLC ("Saconix"), a limited liability company in which Martin Resource Management Corporation held a minority equity interest, purchased and marketed the sulfuric acid produced by the Partnership’s sulfuric acid production plant at Plainview, Texas, that was not consumed by the Partnership’s internal operations. This agreement, as amended, was to remain in place until September 30, 2020 and automatically renew year to year thereafter until either party provided 90 days’ written notice of termination prior to the expiration of the then existing term. Under this agreement, the Partnership sold all of its excess sulfuric acid to Saconix, who then marketed and sold such acid to third-parties. The Partnership shared in the profit of such sales. Effective May 31, 2018, Martin Resource Management Corporation no longer holds an equity interest in Saconix. These transactions are reported below as related party transactions during the period the equity interest was held. Transactions subsequent to Martin Resource Management Corporation's disposition of the equity interest will be reported as third party transactions. 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, 2019 2018 2019 2018 Revenues: Terminalling and storage $ 17,477 $ 20,485 $ 36,449 $ 40,493 Transportation 5,856 7,066 11,499 13,759 Product sales: Sulfur services 9 226 16 612 Terminalling and storage 277 151 691 389 286 377 707 1,001 $ 23,619 $ 27,928 $ 48,655 $ 55,253 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, 2019 2018 2019 2018 Cost of products sold: Sulfur services 2,884 2,492 $ 5,458 $ 5,340 Terminalling and storage 7,203 7,089 13,112 12,668 $ 10,087 $ 9,581 $ 18,570 $ 18,008 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, 2019 2018 2019 2018 Operating expenses: Transportation $ 16,319 $ 15,445 $ 31,299 $ 30,492 Natural gas liquids 2,054 2,232 4,079 4,431 Sulfur services 1,402 1,492 2,326 2,831 Terminalling and storage 4,632 4,589 9,239 9,092 $ 24,407 $ 23,758 $ 46,943 $ 46,846 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, 2019 2018 2019 2018 Selling, general and administrative: Transportation $ 1,729 $ 229 $ 3,457 $ 442 Natural gas liquids 1,128 1,025 2,317 3,279 Sulfur services 710 660 1,426 1,319 Terminalling and storage 737 662 1,454 1,343 Indirect, including overhead allocation 4,254 4,116 8,439 8,235 $ 8,558 $ 6,692 $ 17,093 $ 14,618

Business Segments

Business Segments	6 Months Ended
	Jun. 30, 2019
Segment Reporting [Abstract]
Business Segments	BUSINESS SEGMENTS The Partnership has four reportable segments: natural gas liquids, terminalling and storage, sulfur services and transportation. 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, 2018 , filed with the SEC on February 19, 2019, as amended on Form 8-K/A on May 21, 2019. The Partnership evaluates the performance of its reportable segments based on operating income. There is no allocation of administrative expenses or interest expense. Three Months Ended June 30, 2019 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 $ 54,351 $ (1,603 ) $ 52,748 $ 7,826 $ 4,254 $ 3,668 Transportation 47,233 (5,912 ) 41,321 3,778 (2,629 ) 746 Sulfur services 35,856 — 35,856 2,854 7,528 3,273 Natural gas liquids 57,398 — 57,398 629 456 940 Indirect selling, general and administrative — — — — (4,599 ) — Total $ 194,838 $ (7,515 ) $ 187,323 $ 15,087 $ 5,010 $ 8,627 Three Months Ended June 30, 2018 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 $ 62,314 $ (1,452 ) $ 60,862 $ 11,690 $ 2,653 $ 2,471 Transportation 43,553 (6,347 ) 37,206 2,550 (3,087 ) 2,883 Sulfur services 38,471 — 38,471 2,086 6,257 966 Natural gas liquids 90,643 (18 ) 90,625 620 3,012 258 Indirect selling, general and administrative — — — — (4,346 ) — Total $ 234,981 $ (7,817 ) $ 227,164 $ 16,946 $ 4,489 $ 6,578 Six Months Ended June 30, 2019 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 $ 110,243 $ (3,324 ) $ 106,919 $ 15,663 $ 9,069 $ 9,013 Transportation 92,419 (13,303 ) 79,116 7,348 (6,509 ) 3,207 Sulfur services 67,449 — 67,449 5,722 13,908 5,479 Natural gas liquids 173,872 — 173,872 1,255 7,314 1,227 Indirect selling, general and administrative — — — — (9,166 ) — Total $ 443,983 $ (16,627 ) $ 427,356 $ 29,988 $ 14,616 $ 18,926 Six Months Ended June 30, 2018 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 $ 124,297 $ (2,925 ) $ 121,372 $ 21,849 $ 6,349 $ 4,592 Transportation 85,490 (13,925 ) 71,565 5,016 (8,126 ) 12,566 Sulfur services 76,158 — 76,158 4,150 16,423 2,514 Natural gas liquids 249,806 (19 ) 249,787 1,243 19,248 488 Indirect selling, general and administrative — — — — (8,577 ) — Total $ 535,751 $ (16,869 ) $ 518,882 $ 32,258 $ 25,317 $ 20,160 The Partnership's assets by reportable segment as of June 30, 2019 and December 31, 2018 , are as follows: June 30, 2019 December 31, 2018 Total assets: Terminalling and storage $ 317,325 $ 298,784 Transportation 180,821 146,529 Sulfur services 118,384 115,498 Natural gas liquids 83,978 512,817 Total assets $ 700,508 $ 1,073,628

Commitments and Contingencies

Commitments and Contingencies	6 Months Ended
	Jun. 30, 2019
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	COMMITTMENTS 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 lawsuits filed against it in various United States District Courts, which generally allege that the customer engaged in unlawful and deceptive business practices in connection with its marketing and advertising of its private label motor oil. The Partnership disputes that it has any obligation to defend or indemnify the customer for its conduct. Accordingly, on January 7, 2016, the Partnership filed a Complaint for Declaratory Judgment in the Chancery Court of Davidson County, Tennessee requesting a judicial determination that the Partnership does not owe the customer the demanded defense and indemnity obligations. The lawsuits against the customer have been transferred to the United States District Court for the Western District of Missouri for consolidated pretrial proceedings. On March 1, 2017, at the request of the parties, the Chancery Court of Davidson County, Tennessee administratively closed the Partnership's lawsuit pending rulings in the United States District Court for the Western District of Missouri. In the event that either party moves the Chancery Court of Davidson County, Tennessee to reopen the case, we expect the Court would grant such motion and reopen the case. If the case is reopened, we are currently unable to determine the exposure we may have in this matter, if any.

Fair Value Measurements

Fair Value Measurements	6 Months Ended
	Jun. 30, 2019
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, 2019 December 31, 2018 Commodity derivative contracts, net $ (2,069 ) $ 4 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 noncurrent portion of long-term debt: The carrying amount of the revolving credit facility approximates fair value due to the debt having a variable interest rate and is in Level 2. The Partnership has not had any indicators which represent a change in the market spread associated with its variable interest rate debt. The estimated fair value of the senior unsecured notes is considered Level 1, as the fair value is based on quoted market prices in active markets. June 30, 2019 December 31, 2018 Carrying Value Fair Value Carrying Value Fair Value 2021 Senior unsecured notes $ 373,185 $ 371,534 $ 372,996 $ 360,138

Condensed Consolidated Financia

Condensed Consolidated Financial Information	6 Months Ended
	Jun. 30, 2019
Consolidating Financial Statements [Abstract]
Condensed Consolidated Financial Information	CONDENSED CONSOLIDATED FINANCIAL INFORMATION

Income Taxes

Income Taxes	6 Months Ended
	Jun. 30, 2019
Income Tax Disclosure [Abstract]
Income Taxes	INCOME TAXES Three Months Ended June 30, Six Months Ended June 30, 2019 2018 2019 2018 Provision for income taxes $ 639 $ 132 $ 1,335 $ 281 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. MTI is subject to income taxes due to its corporate structure. Total income tax expense of $429 and $877 , related to the operation of the subsidiary, for the three and six months ended June 30, 2019, respectively, resulted in an effective income tax rate of 26.30% and 25.49% , respectively. Total income tax expense (benefit) of $0 and $0 , related to the operation of the subsidiary, for the three and six months ended June 30, 2018, respectively, resulted in an effective income tax rate of 0% and 0% , respectively. The increase in the effective income tax rate and provision for income taxes during the three and six months ended June 30, 2019, compared to the three and six months ended June 30, 2018, is primarily due to a change in MTI’s tax status from a non-taxable Qualified Subchapter S subsidiary (“QSub”) to a taxable C Corporation upon acquisition. Prior to the acquisition, MTI was a QSub of Martin Resource Management Corporation, a qualifying S Corporation. A QSub is not treated as a separate corporation for federal income tax purposes as it is deemed liquidated into its S Corporation parent. S Corporations are generally not subject to income taxes because income and losses flow through to shareholders and are reported on their individual returns. Subsequent to the acquisition, MTI will file stand-alone C Corporation returns. A current federal income tax expense (benefit) of $(78) and $218 , related to the operation of the subsidiary, were recorded for the three and six months ended June 30, 2019, and $0 and $0 for the three and six months ended June 30, 2018, respectively. A current state income tax expense (benefit) of $20 and $(198) , related to the operation of the subsidiary, were recorded for the three and six months ended June 30, 2019, and $0 and $0 for the three and six months ended June 30, 2018, respectively. In connection with the MTI acquisition, the Partnership also established deferred income taxes of $24,781 associated with book and tax basis differences of the acquired assets and liabilities. The basis differences are primarily related to property, plant and equipment and deductible tax goodwill. Equity of MTI was adjusted for the deferred tax consequences of the basis differences caused by the transaction between entities under common control. 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 $487 and $856 was recorded for the three and six months ended June 30, 2019, respectively, and $0 and $0 was recorded for the three and six months ended June 30, 2018, respectively. A deferred tax asset of $23,925 and $0 , related to the cumulative book and tax temporary differences, existed at June 30, 2019 and December 31, 2018, respectively. All income tax positions taken for all open years are more likely than not to be sustained based upon their technical merit under applicable tax laws.

Subsequent Events

Subsequent Events	6 Months Ended
	Jun. 30, 2019
Subsequent Events [Abstract]
Subsequent Events	SUBSEQUENT EVENTS Quarterly Distribution. On July 18, 2019, the Partnership declared a quarterly cash distribution of $0.25 per common unit for the second quarter of 2019, or $1.00 per common unit on an annualized basis, which will be paid on August 14, 2019 to unitholders of record as of August 7, 2019. Credit Facility Amendment and Extension. On July 18, 2019, the Partnership amended its revolving credit facility to, among other things, extend the maturity date from March 2020 to August 2023 and reduce commitments from $500,000 to $400,000

New Accounting Pronouncements (

New Accounting Pronouncements (Policies)	6 Months Ended
	Jun. 30, 2019
Accounting Changes and Error Corrections [Abstract]
New Accounting Pronouncements	NEW ACCOUNTING PRONOUNCEMENTS In June 2018, the FASB issued ASU 2018-07, Compensation - Stock Compensation: Improvements to Non-employee Share-Based Payment Accounting, which will expand the scope of Topic 718 to include share-based payment transactions for acquiring goods and services from non-employees. The standard is effective for Partnership's financial statements issued for fiscal years beginning after December 15, 2018, and interim periods within those fiscal years. The Partnership adopted this standard effective January 1, 2019. The result of this adoption did not have a material impact on the Partnership's consolidated and condensed financial statements. In February 2016, the FASB issued ASU 2016-02, Leases , which introduces the recognition of lease assets and lease liabilities by lessees for those leases classified as operating leases under previous guidance. Lessor accounting under the new standard is substantially unchanged and the Partnership believes substantially all of our leases will continue to be classified as operating leases under the new standard. Additional qualitative and quantitative disclosures, including significant judgments made by management, will be required. The update is effective for annual reporting periods beginning after December 15, 2018, including interim periods within those reporting periods, with early adoption permitted. The original guidance required application on a modified retrospective basis with the earliest period presented. In August 2018, the FASB issued ASU 2018-11, Targeted Improvements to Financial Accounting Standards Board ("FASB") Accounting Standards Codification ("ASC") 842 , which includes an option to not restate comparative periods in transition and elect to use the effective date of ASC 842, Leases, as the date of initial application of transition. The Partnership adopted this ASU on January 1, 2019, electing the transition option provided under ASU 2018-11. Consequently, financial information was not updated and the disclosures required under the new standard are not provided for dates and periods before January 1, 2019. The new standard provides a number of optional practical expedients in transition. The Partnership elected the "package of practical expedients", which permits the Partnership not to reassess under the new standard our prior conclusions about lease identification, lease classification and initial direct costs. The new standard also provides practical expedients for an entity’s ongoing accounting. The Partnership elected the short-term lease recognition exemption for all leases that qualify. This means, for those assets that qualify, the Partnership did not recognize Right-of-Use ("ROU") assets or lease liabilities, and this includes not recognizing ROU assets or lease liabilities for existing short-term leases of those assets in transition. See Note 9 for more information.
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. • Current and noncurrent portion of long-term debt: The carrying amount of the revolving credit facility approximates fair value due to the debt having a variable interest rate and is in Level 2. The Partnership has not had any indicators which represent a change in the market spread associated with its variable interest rate debt. The estimated fair value of the senior unsecured notes is considered Level 1, as the fair value is based on quoted market prices in active markets.

Acquisitions (Tables)

Acquisitions (Tables)	6 Months Ended
	Jun. 30, 2019
Business Combinations [Abstract]
Schedule of Business Acquisitions, by Acquisition	The acquisition of MTI was recorded at the historical carrying value of the assets at the acquisition date, which were as follows: Accounts receivable, net $ 11,724 Inventories 1,138 Due from affiliates 1,042 Other current assets 897 Property, plant and equipment, net 25,383 Goodwill 489 Other noncurrent assets 362 Current installments of finance lease obligations (5,409 ) Accounts payable (2,564 ) Due to affiliates (482 ) Other accrued liabilities (2,588 ) Finance lease obligations, net of current installments (6,272 ) Historical carrying value of assets acquired $ 23,720 On January 2, 2019, the Partnership acquired all of the issued and outstanding equity interests of MTI, a wholly-owned subsidiary of Martin Resource Management Corporation which operates a fleet of tank trucks providing transportation of petroleum products, liquid petroleum gas, chemicals, sulfur and other products, as well as owns 23 terminals located throughout the Gulf Coast and Southeastern regions of the United States for total consideration as follows: Purchase price 1 $ 135,000 Plus: Working Capital Adjustment 2,795 Less: Finance lease obligations assumed (11,682 ) Cash consideration paid $ 126,113 1 The stock purchase agreement also includes a $10,000
Condensed Income Statement	The separate results of operations related to MTI for the three and six months ended June 30, 2018 which were recast as part of the Partnership's consolidated and condensed statements of operations were as follows: Three Months Ended June 30, 2018 Six Months Ended June 30, 2018 Transportation revenue $ 30,385 $ 60,294 Operating expenses 25,681 51,217 Selling, general and administrative 1,364 2,704 Depreciation and amortization 739 1,519 Total costs and expenses 27,784 55,440 Other operating income, net 164 174 Operating income 2,765 5,028 Other income: Interest expense (49 ) (94 ) Other, net 4 4 Income before income taxes 2,720 4,938 Income taxes — — Net income $ 2,720 $ 4,938

Divestitures and Discontinued_2

Divestitures and Discontinued Operations (Tables)	6 Months Ended
	Jun. 30, 2019
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Disclosure of Long Lived Assets Held-for-sale	At June 30, 2019 and December 31, 2018, certain terminalling and storage and marine transportation assets met the criteria to be classified as held for sale in accordance with ASC 360-10 and are presented at the lower of the assets' carrying amount or fair value less cost to sell by segment in current assets as follows: June 30, 2019 December 31, 2018 Terminalling and storage $ 3,552 $ 3,552 Transportation 1,580 2,100 Assets held for sale $ 5,132 $ 5,652
Natural Gas Storage Assets
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Disposal Groups, Including Discontinued Operations	The operating results, which are included in income (loss) from discontinued operations, were as follows: Three Months Ended June 30, Six Months Ended June 30, 2019 2018 2019 2018 Total revenues $ 11,902 $ 13,804 $ 22,836 $ 29,160 Total costs and expenses and other, net, excluding depreciation and amortization (9,609 ) (5,110 ) (15,360 ) (10,233 ) Depreciation and amortization (4,080 ) (4,684 ) (8,161 ) (9,362 ) Other operating income 1 (178,781 ) (120 ) (178,781 ) (120 ) Income (loss) from discontinued operations before income taxes (180,568 ) 3,890 (179,466 ) 9,445 Income tax expense — — — — Income (loss) from discontinued operations, net of income taxes $ (180,568 ) $ 3,890 $ (179,466 ) $ 9,445 1 The three and six months ended June 30, 2019 includes a loss on the disposition of the Natural Gas Storage Assets of $178,781 . As the disposition of the Natural Gas Storage Assets was completed prior to meeting the criteria in ASC 210-20-14 to be classified as held for sale, the Partnership has adjusted the Balance Sheet as of December 31, 2018 to present separately the assets and liabilities of the Natural Gas Storage Assets. See table below for more information. December 31, 2018 Accounts and other receivables $ 7,269 Inventories 1,942 Other current assets 217 Current assets - Natural Gas Storage Assets $ 9,428 Property, plant and equipment, at cost $ 425,138 Accumulated depreciation (49,238 ) Intangibles and other assets, net 19,489 Non-current assets - Natural Gas Storage Assets $ 395,389 Trade and other accounts payable $ 1,682 Product exchange payable 1,134 Due to affiliates 2 Other accrued liabilities 422 Current liabilities - Natural Gas Storage Assets $ 3,240 Other long-term obligations $ 669 Non-current liabilities - Natural Gas Storage Assets $ 669
West Texas LPG Pipeline L.P.
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Disposal Groups, Including Discontinued Operations	The operating results, which are included in income from discontinued operations, were as follows: Three Months Ended June 30, 2018 Six Months Ended June 30, 2018 Total costs and expenses and other, net, excluding depreciation and amortization 1 $ (94 ) $ (157 ) Equity in earnings 1,131 2,726 Income from discontinued operations before income taxes 1,037 2,569 Income tax expense — — Income from discontinued operations, net of income taxes $ 1,037 $ 2,569 1 These expenses represent direct operating expenses as a result of the Partnership's ownership interest in WTLPG.

Revenue (Tables)

Revenue (Tables)	6 Months Ended
	Jun. 30, 2019
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, 2019 2018 2019 2018 Terminalling and storage segment Lubricant product sales $ 31,371 $ 36,794 $ 62,438 $ 73,257 Throughput and storage 21,377 24,068 44,481 48,115 $ 52,748 $ 60,862 $ 106,919 $ 121,372 Natural gas liquids segment Natural gas liquids product sales $ 57,398 $ 90,625 $ 173,872 $ 249,787 $ 57,398 $ 90,625 $ 173,872 $ 249,787 Sulfur services segment Sulfur product sales $ 8,204 $ 10,479 $ 18,156 $ 22,316 Fertilizer product sales 24,794 25,205 43,576 48,268 Sulfur services 2,858 2,787 5,717 5,574 $ 35,856 $ 38,471 $ 67,449 $ 76,158 Transportation segment Land transportation $ 25,497 $ 24,467 $ 49,616 $ 47,372 Inland transportation 14,188 11,206 26,665 20,898 Offshore transportation 1,636 1,533 2,835 3,295 $ 41,321 $ 37,206 $ 79,116 $ 71,565
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction	The table 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. 2019 2020 2021 2022 2023 Thereafter Total Terminalling and storage Throughput and storage $ 25,189 $ 49,355 $ 46,642 $ 42,735 $ 42,854 $ 392,624 $ 599,399 Sulfur services Sulfur product sales 8,541 4,898 1,181 295 — — 14,915 Transportation Offshore transportation 3,128 — — — — — 3,128 Total $ 36,858 $ 54,253 $ 47,823 $ 43,030 $ 42,854 $ 392,624 $ 617,442

Inventories (Tables)

Inventories (Tables)	6 Months Ended
	Jun. 30, 2019
Inventory Disclosure [Abstract]
Components of Inventory	Components of inventories at June 30, 2019 and December 31, 2018 were as follows: June 30, 2019 December 31, 2018 Natural gas liquids $ 35,909 $ 30,446 Sulfur 7,648 12,818 Fertilizer 11,749 14,208 Lubricants 21,817 22,887 Other 4,097 3,906 $ 81,220 $ 84,265

Investment in West Texas LPG _2

Investment in West Texas LPG Pipeline L.P. (Tables)	6 Months Ended
	Jun. 30, 2019
Equity Method Investments and Joint Ventures [Abstract]
Select Financial Information for Significant Unconsolidated Equity Method Investees	Selected financial information for WTLPG during the period of ownership is as follows: Three Months Ended June 30, Six Months Ended June 30, 2018 Revenues Net Income Revenues Net Income WTLPG $ 23,390 $ 5,653 $ 46,431 $ 13,359

Long-Term Debt (Tables)

Long-Term Debt (Tables)	6 Months Ended
	Jun. 30, 2019
Debt Disclosure [Abstract]
Schedule of Long-Term Debt	At June 30, 2019 and December 31, 2018 , long-term debt consisted of the following: June 30, December 31, $500,000 Revolving credit facility at variable interest rate (5.65% 1 weighted average at June 30, 2019), due March 2020 4 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 and equity method investees, net of unamortized debt issuance costs of $1,787 and $3,537, respectively 2 $ 223,213 $ 283,463 $400,000 Senior notes, 7.25% interest, net of unamortized debt issuance costs of $1,112 and $1,454, respectively, including unamortized premium of $497 and $650, respectively, issued $250,000 February 2013 and $150,000 April 2014, $26,200 repurchased during 2015, due February 2021, unsecured 2,3 373,185 372,996 Total 596,398 656,459 Less: current portion — — Total long-term debt, net of current portion $ 596,398 $ 656,459 1 Interest rate fluctuates based on the LIBOR rate plus an applicable margin set on the date of each advance. The margin above LIBOR is set every three months. Indebtedness under the credit facility bears interest at LIBOR plus an applicable margin or the base prime rate plus an applicable margin. All amounts outstanding at June 30, 2019 and December 31, 2018 were at LIBOR plus an applicable margin. The applicable margin for revolving loans that are LIBOR loans ranges from 2.00% to 3.25% and the applicable margin for revolving loans that are base prime rate loans ranges from 1.00% to 2.25% . The applicable margin for existing LIBOR borrowings at June 30, 2019 is 3.25% . The credit facility contains various covenants which limit the Partnership’s ability to 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 Partnership is permitted to make quarterly distributions so long as no event of default exists. 2 The Partnership is in compliance with all debt covenants as of June 30, 2019 and December 31, 2018 , respectively. 3 The 2021 indenture restricts 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 July 18, 2019, the Partnership amended its revolving credit facility to, among other things, extend the maturity date from March 2020 to August 2023 and reduce commitments from $500,000 to $400,000

Leases (Tables)

Leases (Tables)	6 Months Ended
	Jun. 30, 2019
Leases [Abstract]
Schedule of Future Minimum Lease Obligations, Finance Lease	The Partnership's future minimum lease obligations as of December 31, 2018 consisted of the following: Operating Leases Finance Leases Year 1 $ 13,126 $ 6,022 Year 2 7,194 6,068 Year 3 4,262 223 Year 4 2,642 260 Year 5 1,749 — Thereafter 7,823 — Total $ 36,796 12,573 Less amounts representing interest costs (892 ) Present value of net minimum capital lease payments 11,681 Less current portion (5,409 ) Present value of net minimum capital lease payments, excluding current portion $ 6,272 The Partnership’s future minimum lease obligations as of June 30, 2019 consist of the following: Operating Leases Finance Leases Year 1 $ 9,351 $ 6,558 Year 2 6,426 4,015 Year 3 4,196 223 Year 4 2,594 149 Year 5 1,393 — Thereafter 7,330 — Total $ 31,290 $ 10,945 Less amounts representing interest costs (5,236 ) (627 ) Total lease liability $ 26,054 $ 10,318
Schedule of Future Minimum Lease Obligations, Operating Leases	The Partnership’s future minimum lease obligations as of June 30, 2019 consist of the following: Operating Leases Finance Leases Year 1 $ 9,351 $ 6,558 Year 2 6,426 4,015 Year 3 4,196 223 Year 4 2,594 149 Year 5 1,393 — Thereafter 7,330 — Total $ 31,290 $ 10,945 Less amounts representing interest costs (5,236 ) (627 ) Total lease liability $ 26,054 $ 10,318 The Partnership's future minimum lease obligations as of December 31, 2018 consisted of the following: Operating Leases Finance Leases Year 1 $ 13,126 $ 6,022 Year 2 7,194 6,068 Year 3 4,262 223 Year 4 2,642 260 Year 5 1,749 — Thereafter 7,823 — Total $ 36,796 12,573 Less amounts representing interest costs (892 ) Present value of net minimum capital lease payments 11,681 Less current portion (5,409 ) Present value of net minimum capital lease payments, excluding current portion $ 6,272
Components of Lease Expense	The components of lease expense for the three months and six months ended June 30, 2019 were as follows: Three Months Ended June 30, 2019 Six Months Ended June 30, 2019 Operating lease cost $ 5,363 $ 10,653 Finance lease cost: Amortization of right-of-use assets $ 688 $ 1,310 Interest on lease liabilities 185 368 Total finance lease cost $ 873 $ 1,678 Supplemental cash flow information for the six months ended June 30, 2019 related to leases was as follows: June 30, 2019 Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating leases $ 10,631 Operating cash flows from finance leases 368 Financing cash flows from finance leases 2,672 Right-of-use assets obtained in exchange for lease obligations: Operating leases $ 5,317 Finance leases 1,309
Schedule of Supplemental Balance Sheet Information	Supplemental balance sheet information related to leases was as follows: June 30, 2019 Operating Leases Operating lease right-of-use assets $ 25,682 Current portion of operating lease liabilities included in "Other accrued liabilities" $ 8,141 Operating lease liabilities 17,913 Total operating lease liabilities $ 26,054 Finance Leases Property, plant and equipment, at cost $ 15,367 Accumulated depreciation (2,576 ) Property, plant and equipment, net $ 12,791 Current portion finance lease obligations $ 6,059 Finance lease obligations 4,259 Total finance lease obligations $ 10,318 Weighted Average Remaining Lease Term (years) Operating leases 6.33 Finance leases 1.39 Weighted Average Discount Rate Operating leases 5.26 % Finance leases 6.89 %

Supplemental Balance Sheet In_2

Supplemental Balance Sheet Information (Tables)	6 Months Ended
	Jun. 30, 2019
Balance Sheet Related Disclosures [Abstract]
Schedule of Other Accrued Liabilities	Components of "Other accrued liabilities" were as follows: June 30, 2019 December 31, 2018 Accrued interest $ 10,467 $ 10,735 Asset retirement obligations — 2,721 Property and other taxes payable 4,523 5,751 Accrued payroll 3,703 3,110 Operating lease liabilities 8,141 — Other 2,326 2,063 $ 29,160 $ 24,380
Schedule of Asset Retirement Obligations	The schedule below summarizes the changes in our asset retirement obligations: June 30, 2019 Beginning asset retirement obligations $ 12,429 Accretion expense 218 Liabilities settled (3,900 ) Ending asset retirement obligations 8,747 Current portion of asset retirement obligations 1 — Long-term portion of asset retirement obligations 2 $ 8,747 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, 2019
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: Fair Values of Derivative Instruments in the Consolidated and Condensed Balance Sheets Derivative Assets Derivative Liabilities Fair Values Fair Values Balance Sheet Location June 30, 2019 December 31, 2018 Balance Sheet Location June 30, 2019 December 31, 2018 Derivatives not designated as hedging instruments: Current: Commodity contracts Fair value of derivatives $ — $ 4 Fair value of derivatives $ 2,069 $ — Total derivatives not designated as hedging instruments $ — $ 4 $ 2,069 $ —
Effect of Derivative Instruments on the Consolidated Statement of Operations	Effect of Derivative Instruments on the Consolidated and Condensed Statements of Operations For the Three Months Ended June 30, 2019 and 2018 Location of Gain (Loss) Recognized in Income on Derivatives Amount of Gain (Loss) Recognized in Income on Derivatives 2019 2018 Derivatives not designated as hedging instruments: Commodity contracts Cost of products sold $ (2,083 ) $ (401 ) Total effect of derivatives not designated as hedging instruments $ (2,083 ) $ (401 ) Effect of Derivative Instruments on the Consolidated and Condensed Statements of Operations For the Six Months Ended June 30, 2019 and 2018 Location of Gain (Loss) Recognized in Income on Derivatives Amount of Gain (Loss) Recognized in Income on Derivatives 2019 2018 Derivatives not designated as hedging instruments: Commodity contracts Cost of products sold $ (2,322 ) $ 2,069 Total effect of derivatives not designated as hedging instruments $ (2,322 ) $ 2,069

Partners' Capital (Tables)

Partners' Capital (Tables)	6 Months Ended
	Jun. 30, 2019
Partners' Capital Notes [Abstract]
Reconciliation of Net Income to Partners Interest in Net Income	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, 2019 2018 2019 2018 Basic weighted average limited partner units outstanding 38,871,420 38,722,037 38,912,250 38,828,845 Dilutive effect of restricted units issued — — — 5,576 Total weighted average limited partner diluted units outstanding 38,871,420 38,722,037 38,912,250 38,834,421 Three Months Ended June 30, Six Months Ended June 30, 2019 2018 2019 2018 Continuing operations: Loss from continuing operations $ (10,614 ) $ (9,453 ) $ (15,372 ) $ (1,504 ) Less pre-acquisition income allocated to the general partner — (2,720 ) — (4,938 ) Less general partner’s interest in net income (loss): Distributions payable on behalf of general partner interest 11 819 31 (112 ) General partner interest in undistributed loss (223 ) (1,122 ) (338 ) 96 Less loss allocable to unvested restricted units (4 ) (13 ) (5 ) — Limited partners’ interest in net loss $ (10,398 ) $ (11,857 ) $ (15,060 ) $ (6,426 ) Three Months Ended June 30, Six Months Ended June 30, 2019 2018 2019 2018 Discontinued operations: Income (loss) from discontinued operations $ (180,568 ) $ 4,927 $ (179,466 ) $ 12,014 Less general partner’s interest in net income (loss): Distributions payable on behalf of general partner interest 185 (427 ) 362 896 General partner interest in undistributed loss (3,797 ) 585 (3,952 ) (769 ) Less income (loss) allocable to unvested restricted units (61 ) 7 (62 ) 2 Limited partners’ interest in net income (loss) $ (176,895 ) $ 4,762 $ (175,814 ) $ 11,885

Unit Based Awards (Tables)

Unit Based Awards (Tables)	6 Months Ended
	Jun. 30, 2019
Share-based Payment Arrangement [Abstract]
Schedule of Compensation Costs Related to Unit Based Plan	Amounts recognized in 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, 2019 2018 2019 2018 Employees $ 300 $ 345 $ 629 $ 441 Non-employee directors 63 43 86 79 Total unit-based compensation expense $ 363 $ 388 $ 715 $ 520
Summary of Restricted Unit Activity	A summary of the restricted unit activity for the six months ended June 30, 2019 is provided below: Number of Units Weighted Average Grant-Date Fair Value Per Unit Non-vested, beginning of period 624,125 $ 13.78 Granted (TBRU) 16,944 $ 12.45 Vested (107,762 ) $ 13.82 Forfeited (154,288 ) $ 13.90 Non-Vested, end of period 379,019 $ 13.91 Aggregate intrinsic value, end of period $ 2,706
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 six months ended June 30, 2019 and 2018 is provided below: Three Months Ended June 30, Six Months Ended June 30, 2019 2018 2019 2018 Aggregate intrinsic value of units vested $ — $ — $ 1,351 $ 1,188 Fair value of units vested — — 1,551 2,232

Related Party Transactions (Tab

Related Party Transactions (Tables)	6 Months Ended
	Jun. 30, 2019
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, 2019 2018 2019 2018 Revenues: Terminalling and storage $ 17,477 $ 20,485 $ 36,449 $ 40,493 Transportation 5,856 7,066 11,499 13,759 Product sales: Sulfur services 9 226 16 612 Terminalling and storage 277 151 691 389 286 377 707 1,001 $ 23,619 $ 27,928 $ 48,655 $ 55,253 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, 2019 2018 2019 2018 Cost of products sold: Sulfur services 2,884 2,492 $ 5,458 $ 5,340 Terminalling and storage 7,203 7,089 13,112 12,668 $ 10,087 $ 9,581 $ 18,570 $ 18,008 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, 2019 2018 2019 2018 Operating expenses: Transportation $ 16,319 $ 15,445 $ 31,299 $ 30,492 Natural gas liquids 2,054 2,232 4,079 4,431 Sulfur services 1,402 1,492 2,326 2,831 Terminalling and storage 4,632 4,589 9,239 9,092 $ 24,407 $ 23,758 $ 46,943 $ 46,846 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, 2019 2018 2019 2018 Selling, general and administrative: Transportation $ 1,729 $ 229 $ 3,457 $ 442 Natural gas liquids 1,128 1,025 2,317 3,279 Sulfur services 710 660 1,426 1,319 Terminalling and storage 737 662 1,454 1,343 Indirect, including overhead allocation 4,254 4,116 8,439 8,235 $ 8,558 $ 6,692 $ 17,093 $ 14,618

Business Segments (Tables)

Business Segments (Tables)	6 Months Ended
	Jun. 30, 2019
Segment Reporting [Abstract]
Segment Reporting by Segment	Three Months Ended June 30, 2019 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 $ 54,351 $ (1,603 ) $ 52,748 $ 7,826 $ 4,254 $ 3,668 Transportation 47,233 (5,912 ) 41,321 3,778 (2,629 ) 746 Sulfur services 35,856 — 35,856 2,854 7,528 3,273 Natural gas liquids 57,398 — 57,398 629 456 940 Indirect selling, general and administrative — — — — (4,599 ) — Total $ 194,838 $ (7,515 ) $ 187,323 $ 15,087 $ 5,010 $ 8,627 Three Months Ended June 30, 2018 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 $ 62,314 $ (1,452 ) $ 60,862 $ 11,690 $ 2,653 $ 2,471 Transportation 43,553 (6,347 ) 37,206 2,550 (3,087 ) 2,883 Sulfur services 38,471 — 38,471 2,086 6,257 966 Natural gas liquids 90,643 (18 ) 90,625 620 3,012 258 Indirect selling, general and administrative — — — — (4,346 ) — Total $ 234,981 $ (7,817 ) $ 227,164 $ 16,946 $ 4,489 $ 6,578 Six Months Ended June 30, 2019 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 $ 110,243 $ (3,324 ) $ 106,919 $ 15,663 $ 9,069 $ 9,013 Transportation 92,419 (13,303 ) 79,116 7,348 (6,509 ) 3,207 Sulfur services 67,449 — 67,449 5,722 13,908 5,479 Natural gas liquids 173,872 — 173,872 1,255 7,314 1,227 Indirect selling, general and administrative — — — — (9,166 ) — Total $ 443,983 $ (16,627 ) $ 427,356 $ 29,988 $ 14,616 $ 18,926 Six Months Ended June 30, 2018 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 $ 124,297 $ (2,925 ) $ 121,372 $ 21,849 $ 6,349 $ 4,592 Transportation 85,490 (13,925 ) 71,565 5,016 (8,126 ) 12,566 Sulfur services 76,158 — 76,158 4,150 16,423 2,514 Natural gas liquids 249,806 (19 ) 249,787 1,243 19,248 488 Indirect selling, general and administrative — — — — (8,577 ) — Total $ 535,751 $ (16,869 ) $ 518,882 $ 32,258 $ 25,317 $ 20,160
Assets by Segment	The Partnership's assets by reportable segment as of June 30, 2019 and December 31, 2018 , are as follows: June 30, 2019 December 31, 2018 Total assets: Terminalling and storage $ 317,325 $ 298,784 Transportation 180,821 146,529 Sulfur services 118,384 115,498 Natural gas liquids 83,978 512,817 Total assets $ 700,508 $ 1,073,628

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	6 Months Ended
	Jun. 30, 2019
Fair Value Disclosures [Abstract]
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis	June 30, 2019 December 31, 2018 Carrying Value Fair Value Carrying Value Fair Value 2021 Senior unsecured notes $ 373,185 $ 371,534 $ 372,996 $ 360,138 Assets and liabilities measured at fair value on a recurring basis are summarized below: Level 2 June 30, 2019 December 31, 2018 Commodity derivative contracts, net $ (2,069 ) $ 4

Income Taxes (Tables)

Income Taxes (Tables)	6 Months Ended
	Jun. 30, 2019
Income Tax Disclosure [Abstract]
Schedule of Income Tax Expense	Three Months Ended June 30, Six Months Ended June 30, 2019 2018 2019 2018 Provision for income taxes $ 639 $ 132 $ 1,335 $ 281

Nature of Operations and Basi_2

Nature of Operations and Basis of Presentation (Details) $ in Thousands, ft³ in Billions	Jan. 02, 2019terminal	Jun. 30, 2019segment	Jun. 28, 2019USD ($)ft³	Jul. 31, 2018mi
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Number of primary business lines | segment		4
Discontinued Operations, Disposed of by Sale | Natural Gas Storage Assets
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Natural gas storage (in cubic feet) | ft³			50
Proceeds from sale of assets | $			$ 210,067
Discontinued Operations, Disposed of by Sale | West Texas LPG Pipeline L.P.
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Ownership percentage				20.00%
Length of common-carrier pipeline system (in miles) | mi				2,300
Martin Transport Inc
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Number of terminals | terminal	23

Acquisitions - Narrative (Detai

Acquisitions - Narrative (Details) $ in Thousands	Jan. 02, 2019USD ($)terminal	Jun. 30, 2019USD ($)	Jun. 30, 2018USD ($)	[1]
Business Acquisition [Line Items]
Excess purchase price over carrying value of acquired assets		$ 102,393	$ 26
Martin Transport Inc
Business Acquisition [Line Items]
Number of terminals | terminal	23
Excess purchase price over carrying value of acquired assets	$ 102,393
[1]	Financial information for 2018 has been revised to include results attributable to MTI acquired from Martin Resource Management Corporation. See Note 1 – Nature of Operations and Basis of Presentation.

Acquisitions - Purchase Price (

Acquisitions - Purchase Price (Details) - USD ($) $ in Thousands	Jan. 02, 2019	Jun. 30, 2019	Jun. 30, 2018	[1]
Business Acquisition [Line Items]
Cash consideration paid		$ 23,720	$ 0
Martin Transport Inc
Business Acquisition [Line Items]
Purchase price	$ 135,000
Plus: Working Capital Adjustment	2,795
Less: Finance lease obligations assumed	(11,682)
Cash consideration paid	126,113
Earn-out based on performance thresholds	$ 10,000
[1]	Financial information for 2018 has been revised to include results attributable to MTI acquired from Martin Resource Management Corporation. See Note 1 – Nature of Operations and Basis of Presentation.

Acquisitions - Assets Acquired

Acquisitions - Assets Acquired (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Jan. 02, 2019	Dec. 31, 2018	[1]
Business Acquisition [Line Items]
Goodwill	$ 17,785		$ 17,785
Martin Transport Inc
Business Acquisition [Line Items]
Accounts receivable, net		$ 11,724
Inventories		1,138
Due from affiliates		1,042
Other current assets		897
Property, plant and equipment, net		25,383
Goodwill		489
Other noncurrent assets		362
Current installments of finance lease obligations		(5,409)
Accounts payable		(2,564)
Due to affiliates		(482)
Other accrued liabilities		(2,588)
Finance lease obligations, net of current installments		(6,272)
Historical carrying value of assets acquired		$ 23,720
[1]	Financial information for 2018 has been revised to include results attributable to MTI acquired from Martin Resource Management Corporation. See Note 1 – Nature of Operations and Basis of Presentation.

Acquisitions - Income Statement

Acquisitions - Income Statement (Details) - USD ($) $ in Thousands		3 Months Ended			6 Months Ended
		Jun. 30, 2019	Jun. 30, 2018		Jun. 30, 2019	Jun. 30, 2018
Business Acquisition [Line Items]
Revenues		$ 187,323	$ 227,164	[1]	$ 427,356	$ 518,882	[1]
Operating expenses	[2]	53,579	52,915	[1]	105,428	105,741	[1]
Selling, general and administrative	[2]	10,226	8,894	[1]	20,426	18,833	[1]
Depreciation and amortization		15,087	16,946	[1]	29,988	32,258	[1],[3]
Total costs and expenses		180,680	222,469	[1]	410,387	493,367	[1]
Other operating income, net		(1,633)	(206)	[1]	(2,353)	(198)	[1]
Operating income		5,010	4,489	[1]	14,616	25,317	[1]
Interest expense		(14,986)	(13,815)	[1]	(28,657)	(26,545)	[1]
Other, net		1	5	[1]	4	5	[1]
Net loss before taxes		(9,975)	(9,321)	[1]	(14,037)	(1,223)	[1]
Income tax expense		(639)	(132)	[1]	(1,335)	(281)	[1]
Net income (loss)		(191,182)	(4,526)	[1]	(194,838)	10,510	[1],[3]
Martin Transport Inc
Business Acquisition [Line Items]
Operating expenses			25,681			51,217
Selling, general and administrative			1,364			2,704
Depreciation and amortization			739			1,519
Total costs and expenses			27,784			55,440
Other operating income, net			164			174
Operating income			2,765			5,028
Interest expense			(49)			(94)
Other, net			4			4
Net loss before taxes			2,720			4,938
Income tax expense			0			0
Net income (loss)			2,720			4,938
Transportation
Business Acquisition [Line Items]
Revenues	[2]	$ 41,321	37,206	[1]	$ 79,116	71,565	[1]
Transportation | Martin Transport Inc
Business Acquisition [Line Items]
Revenues			$ 30,385			$ 60,294
[1]	Financial information for 2018 has been revised to include results attributable to MTI acquired from Martin Resource Management Corporation. See Note 1 – Nature of Operations and Basis of Presentation.
[2]	Related Party Transactions Included Above Three Months Ended Six Months Ended June 30, June 30, 2019 2018 1 2019 2018 1 Revenues:* Terminalling and storage $ 17,477 $ 20,485 $ 36,449 $ 40,493 Transportation 5,856 7,066 11,499 13,759 Product Sales 286 377 707 1,001 Costs and expenses:* Cost of products sold: (excluding depreciation and amortization) Sulfur services 2,884 2,492 5,458 5,340 Terminalling and storage 7,203 7,089 13,112 12,668 Expenses: Operating expenses 24,407 23,758 46,943 46,846 Selling, general and administrative 8,558 6,692 17,093 14,618
[3]	Financial information for 2018 has been revised to include results attributable to MTI acquired from Martin Resource Management Corporation. See Note 1 – Nature of Operations and Basis of Presentation.

Divestitures and Discontinued_3

Divestitures and Discontinued Operations - Discontinued Operations (Details) $ in Thousands, ft³ in Billions	Jul. 31, 2018USD ($)mi	Jun. 30, 2019USD ($)	Jun. 30, 2018USD ($)		Jun. 30, 2019USD ($)	Jun. 30, 2018USD ($)		Jun. 28, 2019USD ($)ft³
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Income from discontinued operations, net of income taxes		$ (180,568)	$ 4,927	[1]	$ (179,466)	$ 12,014	[1],[2]
Natural Gas Storage Assets | Discontinued Operations, Disposed of by Sale
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Natural gas storage (in cubic feet) | ft³								50
Proceeds from sale of assets								$ 210,067
Total revenues		11,902	13,804		22,836	29,160
Total costs and expenses and other, net, excluding depreciation and amortization		(9,609)	(5,110)		(15,360)	(10,233)
Depreciation and amortization		(4,080)	(4,684)		(8,161)	(9,362)
Other operating income		(178,781)	(120)		(178,781)	(120)
Income from discontinued operations before income taxes		(180,568)	3,890		(179,466)	9,445
Income tax expense		0	0		0	0
Income from discontinued operations, net of income taxes		(180,568)	3,890		(179,466)	9,445
Loss on disposition		$ 178,781			$ 178,929
West Texas LPG Pipeline L.P. | Discontinued Operations, Disposed of by Sale
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Total costs and expenses and other, net, excluding depreciation and amortization			(94)			(157)
Income from discontinued operations before income taxes			1,037			2,569
Income tax expense			0			0
Income from discontinued operations, net of income taxes			1,037			2,569
Ownership percentage	20.00%
Length of common-carrier pipeline system (in miles) | mi	2,300
Proceeds from sale of equity method investments	$ 193,705
Equity in earnings			$ 1,131			$ 2,726
[1]	Financial information for 2018 has been revised to include results attributable to MTI acquired from Martin Resource Management Corporation. See Note 1 – Nature of Operations and Basis of Presentation.
[2]	Financial information for 2018 has been revised to include results attributable to MTI acquired from Martin Resource Management Corporation. See Note 1 – Nature of Operations and Basis of Presentation.

Divestitures and Discontinued_4

Divestitures and Discontinued Operations - Balance Sheet (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Current assets - Natural Gas Storage Assets	$ 0	$ 9,428	[1]
Non-current assets - Natural Gas Storage Assets	0	395,389	[1]
Current liabilities - Natural Gas Storage Assets	0	3,240	[1]
Non-current liabilities - Natural Gas Storage Assets	$ 0	669	[1]
Natural Gas Storage Assets | Discontinued Operations, Disposed of by Sale
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Accounts and other receivables		7,269
Inventories		1,942
Other current assets		217
Current assets - Natural Gas Storage Assets		9,428
Property, plant and equipment, at cost		425,138
Accumulated depreciation		(49,238)
Intangibles and other assets, net		19,489
Non-current assets - Natural Gas Storage Assets		395,389
Trade and other accounts payable		1,682
Product exchange payable		1,134
Due to affiliates		2
Other accrued liabilities		422
Current liabilities - Natural Gas Storage Assets		3,240
Other long-term obligations		669
Non-current liabilities - Natural Gas Storage Assets		$ 669
[1]	Financial information for 2018 has been revised to include results attributable to MTI acquired from Martin Resource Management Corporation. See Note 1 – Nature of Operations and Basis of Presentation.

Divestitures and Discontinued_5

Divestitures and Discontinued Operations - Long-Lived Assets Held-for-Sale (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Assets held for sale	$ 5,132	$ 5,652	[1]
Terminalling and storage
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Assets held for sale	3,552	3,552
Transportation
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Assets held for sale	$ 1,580	$ 2,100
[1]	Financial information for 2018 has been revised to include results attributable to MTI acquired from Martin Resource Management Corporation. See Note 1 – Nature of Operations and Basis of Presentation.

Revenue - Disaggregation of Rev

Revenue - Disaggregation of Revenue (Details) - USD ($) $ in Thousands		3 Months Ended			6 Months Ended
		Jun. 30, 2019	Jun. 30, 2018		Jun. 30, 2019	Jun. 30, 2018
Disaggregation of Revenue [Line Items]
Revenues		$ 187,323	$ 227,164	[1]	$ 427,356	$ 518,882	[1]
Lubricant product sales
Disaggregation of Revenue [Line Items]
Revenues	[2]	31,371	36,794	[1]	62,438	73,257	[1]
Throughput and storage
Disaggregation of Revenue [Line Items]
Revenues	[2]	21,377	24,068	[1]	44,481	48,115	[1]
Natural gas liquids product sales
Disaggregation of Revenue [Line Items]
Revenues	[2]	57,398	90,625	[1]	173,872	249,787	[1]
Sulfur services
Disaggregation of Revenue [Line Items]
Revenues		2,858	2,787	[1]	5,717	5,574	[1]
Terminalling and storage segment
Disaggregation of Revenue [Line Items]
Revenues		52,748	60,862		106,919	121,372
Terminalling and storage segment | Lubricant product sales
Disaggregation of Revenue [Line Items]
Revenues		31,371	36,794		62,438	73,257
Terminalling and storage segment | Throughput and storage
Disaggregation of Revenue [Line Items]
Revenues		21,377	24,068		44,481	48,115
Natural gas liquids segment
Disaggregation of Revenue [Line Items]
Revenues		57,398	90,625		173,872	249,787
Natural gas liquids segment | Natural gas liquids product sales
Disaggregation of Revenue [Line Items]
Revenues		57,398	90,625		173,872	249,787
Sulfur services segment
Disaggregation of Revenue [Line Items]
Revenues		35,856	38,471		67,449	76,158
Sulfur services segment | Sulfur product sales
Disaggregation of Revenue [Line Items]
Revenues		8,204	10,479		18,156	22,316
Sulfur services segment | Fertilizer product sales
Disaggregation of Revenue [Line Items]
Revenues		24,794	25,205		43,576	48,268
Sulfur services segment | Sulfur services
Disaggregation of Revenue [Line Items]
Revenues		2,858	2,787		5,717	5,574
Transportation
Disaggregation of Revenue [Line Items]
Revenues		41,321	37,206		79,116	71,565
Transportation | Land transportation
Disaggregation of Revenue [Line Items]
Revenues		25,497	24,467		49,616	47,372
Transportation | Inland transportation
Disaggregation of Revenue [Line Items]
Revenues		14,188	11,206		26,665	20,898
Transportation | Offshore transportation
Disaggregation of Revenue [Line Items]
Revenues		$ 1,636	$ 1,533		$ 2,835	$ 3,295
[1]	Financial information for 2018 has been revised to include results attributable to MTI acquired from Martin Resource Management Corporation. See Note 1 – Nature of Operations and Basis of Presentation.
[2]	Related Party Transactions Included Above Three Months Ended Six Months Ended June 30, June 30, 2019 2018 1 2019 2018 1 Revenues:* Terminalling and storage $ 17,477 $ 20,485 $ 36,449 $ 40,493 Transportation 5,856 7,066 11,499 13,759 Product Sales 286 377 707 1,001 Costs and expenses:* Cost of products sold: (excluding depreciation and amortization) Sulfur services 2,884 2,492 5,458 5,340 Terminalling and storage 7,203 7,089 13,112 12,668 Expenses: Operating expenses 24,407 23,758 46,943 46,846 Selling, general and administrative 8,558 6,692 17,093 14,618

Revenue - Estimated Revenue Exp

Revenue - Estimated Revenue Expected to be Recognized in Future (Details) $ in Thousands	Jun. 30, 2019USD ($)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2019-07-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation	$ 36,858
Revenue, remaining performance obligation, expected timing of satisfaction, period	6 months
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2019-07-01 | Throughput and storage | Terminalling and storage
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation	$ 25,189
Revenue, remaining performance obligation, expected timing of satisfaction, period	6 months
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2019-07-01 | Sulfur product sales | Sulfur services
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation	$ 8,541
Revenue, remaining performance obligation, expected timing of satisfaction, period	6 months
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2019-07-01 | Offshore transportation | Transportation
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation	$ 3,128
Revenue, remaining performance obligation, expected timing of satisfaction, period	6 months
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2020-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation	$ 54,253
Revenue, remaining performance obligation, expected timing of satisfaction, period	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2020-01-01 | Throughput and storage | Terminalling and storage
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation	$ 49,355
Revenue, remaining performance obligation, expected timing of satisfaction, period	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2020-01-01 | Sulfur product sales | Sulfur services
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation	$ 4,898
Revenue, remaining performance obligation, expected timing of satisfaction, period	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2020-01-01 | Offshore transportation | Transportation
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation	$ 0
Revenue, remaining performance obligation, expected timing of satisfaction, period	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation	$ 47,823
Revenue, remaining performance obligation, expected timing of satisfaction, period	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-01-01 | Throughput and storage | Terminalling and storage
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation	$ 46,642
Revenue, remaining performance obligation, expected timing of satisfaction, period	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-01-01 | Sulfur product sales | Sulfur services
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation	$ 1,181
Revenue, remaining performance obligation, expected timing of satisfaction, period	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-01-01 | Offshore transportation | Transportation
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation	$ 0
Revenue, remaining performance obligation, expected timing of satisfaction, period	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation	$ 43,030
Revenue, remaining performance obligation, expected timing of satisfaction, period	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-01-01 | Throughput and storage | Terminalling and storage
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation	$ 42,735
Revenue, remaining performance obligation, expected timing of satisfaction, period	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-01-01 | Sulfur product sales | Sulfur services
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation	$ 295
Revenue, remaining performance obligation, expected timing of satisfaction, period	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-01-01 | Offshore transportation | Transportation
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation	$ 0
Revenue, remaining performance obligation, expected timing of satisfaction, period	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation	$ 42,854
Revenue, remaining performance obligation, expected timing of satisfaction, period	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-01-01 | Throughput and storage | Terminalling and storage
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation	$ 42,854
Revenue, remaining performance obligation, expected timing of satisfaction, period	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-01-01 | Sulfur product sales | Sulfur services
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation	$ 0
Revenue, remaining performance obligation, expected timing of satisfaction, period	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-01-01 | Offshore transportation | Transportation
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation	$ 0
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 [Line Items]
Revenue, remaining performance obligation	$ 392,624
Revenue, remaining performance obligation, expected timing of satisfaction, period
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-01-01 | Throughput and storage | Terminalling and storage
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation	$ 392,624
Revenue, remaining performance obligation, expected timing of satisfaction, period
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-01-01 | Sulfur product sales | Sulfur services
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation	$ 0
Revenue, remaining performance obligation, expected timing of satisfaction, period
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-01-01 | Offshore transportation | Transportation
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation	$ 0
Revenue, remaining performance obligation, expected timing of satisfaction, period
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: (nil)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation	$ 617,442
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: (nil) | Throughput and storage | Terminalling and storage
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation	599,399
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: (nil) | Sulfur product sales | Sulfur services
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation	14,915
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: (nil) | Offshore transportation | Transportation
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation	$ 3,128

Inventories (Details)

Inventories (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Inventory Disclosure [Abstract]
Natural gas liquids	$ 35,909	$ 30,446
Sulfur	7,648	12,818
Fertilizer	11,749	14,208
Lubricants	21,817	22,887
Other	4,097	3,906
Inventories	$ 81,220	$ 84,265	[1]
[1]	Financial information for 2018 has been revised to include results attributable to MTI acquired from Martin Resource Management Corporation. See Note 1 – Nature of Operations and Basis of Presentation.

Investment in West Texas LPG _3

Investment in West Texas LPG Pipeline L.P. - Narrative (Details) - mi	Jul. 31, 2018	Jul. 30, 2018
West Texas LPG Pipeline L.P.
Schedule of Equity Method Investments [Line Items]
Ownership percentage		20.00%
Length of common-carrier pipeline system (in miles)		2,300
West Texas LPG Pipeline L.P. | Common Limited
Schedule of Equity Method Investments [Line Items]
Ownership percentage		19.80%
West Texas LPG Pipeline L.P. | General Partner
Schedule of Equity Method Investments [Line Items]
Ownership percentage		0.20%
West Texas LPG Pipeline L.P. | Discontinued Operations, Disposed of by Sale
Schedule of Equity Method Investments [Line Items]
Ownership percentage	20.00%
Length of common-carrier pipeline system (in miles)	2,300

Investment in West Texas LPG _4

Investment in West Texas LPG Pipeline L.P. - Selected Financial Information for Equity Method Investees (Details) - West Texas LPG Pipeline L.P. - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2018
Schedule of Equity Method Investments [Line Items]
Revenues	$ 23,390	$ 46,431
Net Income	$ 5,653	$ 13,359

Long-Term Debt (Details)

Long-Term Debt (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Jul. 18, 2019	Jul. 17, 2019	Dec. 31, 2018		Dec. 31, 2015	Apr. 30, 2014	Feb. 28, 2013
Debt Instrument [Line Items]
Total long-term debt, net of current portion	$ 596,398,000		$ 596,398,000				$ 656,459,000
Less: current portion	0		0				0
Total long-term debt, net of current portion	596,398,000		596,398,000				656,459,000	[1]
Cash paid for interest	7,330,000	$ 6,077,000	26,693,000	$ 24,955,000
Capitalized interest	0	$ 167,000	2,000	$ 328,000
Revolving Loan Facility
Debt Instrument [Line Items]
Total long-term debt, net of current portion	223,213,000		223,213,000				283,463,000
Face amount	$ 500,000,000		$ 500,000,000
Weighted average interest rate	5.65%		5.65%
Unamortized debt issuance costs	$ 1,787,000		$ 1,787,000				3,537,000
Revolving Loan Facility | LIBOR
Debt Instrument [Line Items]
Applicable margins			3.25%
Revolving Loan Facility | LIBOR | Minimum
Debt Instrument [Line Items]
Applicable margins			2.00%
Revolving Loan Facility | LIBOR | Maximum
Debt Instrument [Line Items]
Applicable margins			3.25%
Revolving Loan Facility | Prime Rate | Minimum
Debt Instrument [Line Items]
Applicable margins			1.00%
Revolving Loan Facility | Prime Rate | Maximum
Debt Instrument [Line Items]
Applicable margins			2.25%
Senior Notes | Senior Notes 7.25%
Debt Instrument [Line Items]
Total long-term debt, net of current portion	373,185,000		$ 373,185,000				372,996,000
Face amount	400,000,000		400,000,000							$ 150,000,000	$ 250,000,000
Unamortized debt issuance costs	$ 1,112,000		$ 1,112,000				1,454,000
Stated interest rate	7.25%		7.25%
Unamortized premium	$ 497,000		$ 497,000				$ 650,000
Repurchase amount									$ 26,200,000
Subsequent Event | Revolving Loan Facility
Debt Instrument [Line Items]
Face amount					$ 400,000,000	$ 500,000,000
[1]	Financial information for 2018 has been revised to include results attributable to MTI acquired from Martin Resource Management Corporation. See Note 1 – Nature of Operations and Basis of Presentation.

Leases - Narrative (Details)

Leases - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Jan. 02, 2019	Jan. 01, 2019	Dec. 31, 2018	[1]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Increase in assets		$ 700,508				$ 1,073,628
Increase in liabilities		737,622				$ 785,196
Operating lease right-of-use assets		25,682
Operating lease liability		$ 26,054
Lease termination term		1 year
Lease not yet commenced, amount		$ 2,003
Rent expense	$ 5,869		$ 12,235
Non-cancelable revenue arrangements, future minimum revenues, 2019		11,003
Non-cancelable revenue arrangements, future minimum revenues, 2020		15,434
Non-cancelable revenue arrangements, future minimum revenues, 2021		11,986
Non-cancelable revenue arrangements, future minimum revenues, 2022		10,971
Non-cancelable revenue arrangements, future minimum revenues, 2023		10,576
Non-cancelable revenue arrangements, future minimum revenues, subsequent years		$ 58,128
Accounting Standards Update 2016-02
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Increase in assets					$ 19,047
Increase in liabilities					$ 19,047
Martin Transport Inc
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating lease right-of-use assets				$ 6,505
Operating lease liability				$ 6,505
Minimum
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Lease term		1 year
Lease not yet commenced, term		3 years
Maximum
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Lease term		17 years
Lease renewal term		5 years
Lease not yet commenced, term		5 years
[1]	Financial information for 2018 has been revised to include results attributable to MTI acquired from Martin Resource Management Corporation. See Note 1 – Nature of Operations and Basis of Presentation.

Leases - Future Minimum Lease O

Leases - Future Minimum Lease Obligations (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Operating Leases
Year 1		$ 13,126
Year 2		7,194
Year 3		4,262
Year 4		2,642
Year 5		1,749
Thereafter		7,823
Total		36,796
Finance Leases
Year 1		6,022
Year 2		6,068
Year 3		223
Year 4		260
Year 5		0
Thereafter		0
Total		12,573
Less amounts representing interest costs		(892)
Present value of net minimum capital lease payments		11,681
Less current portion		(5,409)
Present value of net minimum capital lease payments, excluding current portion		$ 6,272
Operating Leases
Year 1	$ 9,351
Year 2	6,426
Year 3	4,196
Year 4	2,594
Year 5	1,393
Thereafter	7,330
Total	31,290
Less amounts representing interest costs	(5,236)
Total lease liability	26,054
Finance Leases
Year 1	6,558
Year 2	4,015
Year 3	223
Year 4	149
Year 5	0
Thereafter	0
Total	10,945
Less amounts representing interest costs	(627)
Total lease liability	$ 10,318

Leases - Lease Costs (Details)

Leases - Lease Costs (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2019
Leases [Abstract]
Operating lease cost	$ 5,363	$ 10,653
Finance lease cost:
Amortization of right-of-use assets	688	1,310
Interest on lease liabilities	185	368
Total finance lease cost	$ 873	$ 1,678

Leases - Cash Flow Information

Leases - Cash Flow Information (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2019USD ($)
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$ 10,631
Operating cash flows from finance leases	368
Financing cash flows from finance leases	2,672
Right-of-use assets obtained in exchange for lease obligations:
Operating leases	5,317
Finance leases	$ 1,309

Leases - Balance Sheet Informat

Leases - Balance Sheet Information (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Operating Leases
Operating lease right-of-use assets	$ 25,682
Current portion of operating lease liabilities included in Other accrued liabilities	8,141	$ 0
Operating lease liabilities	17,913
Total operating lease liabilities	26,054
Finance Leases
Property, plant and equipment, at cost	15,367
Accumulated depreciation	(2,576)
Property, plant and equipment, net	12,791
Current portion finance lease obligations	6,059	5,409	[1]
Finance lease obligations	4,259	$ 6,272
Present value of net minimum finance lease payments	$ 10,318
Weighted Average Remaining Lease Term (years)
Operating leases	6 years 3 months 29 days
Finance leases	1 year 4 months 20 days
Weighted Average Discount Rate
Operating leases	5.26%
Finance leases	6.89%
[1]	Financial information for 2018 has been revised to include results attributable to MTI acquired from Martin Resource Management Corporation. See Note 1 – Nature of Operations and Basis of Presentation.

Supplemental Balance Sheet In_3

Supplemental Balance Sheet Information - Other Accrued Liabilities (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Balance Sheet Related Disclosures [Abstract]
Accrued interest	$ 10,467	$ 10,735
Asset retirement obligations	0	2,721
Property and other taxes payable	4,523	5,751
Accrued payroll	3,703	3,110
Operating lease liabilities	8,141	0
Other	2,326	2,063
Total other accrued liabilities	$ 29,160	$ 24,380	[1]
[1]	Financial information for 2018 has been revised to include results attributable to MTI acquired from Martin Resource Management Corporation. See Note 1 – Nature of Operations and Basis of Presentation.

Supplemental Balance Sheet In_4

Supplemental Balance Sheet Information - Asset Retirement Obligations (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2019	Dec. 31, 2018
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]
Beginning asset retirement obligations	$ 12,429
Accretion expense	218
Liabilities settled	(3,900)
Ending asset retirement obligations	8,747
Current portion of asset retirement obligations	0	$ (2,721)
Long-term portion of asset retirement obligations	$ 8,747

Derivative Instruments and He_3

Derivative Instruments and Hedging Activities - Narrative (Details) - bbl bbl in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2019	Dec. 31, 2018
Commodity contracts
Derivatives, Fair Value [Line Items]
Notional quantity (in bbl)	370	55

Derivative Instruments and He_4

Derivative Instruments and Hedging Activities - Balance Sheet Derivatives (Details) - Derivatives not designated as hedging instruments - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Derivatives, Fair Value [Line Items]
Derivative Assets	$ 0	$ 4
Derivative Liabilities	2,069	0
Commodity contracts | Fair value of derivatives
Derivatives, Fair Value [Line Items]
Derivative Assets	0	4
Derivative Liabilities	$ 2,069	$ 0

Derivative Instruments and He_5

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, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Recognized in Income on Derivatives	$ (2,083)	$ (401)	$ (2,322)	$ 2,069
Commodity contracts | Cost of products sold
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Recognized in Income on Derivatives	$ (2,083)	$ (401)	$ (2,322)	$ 2,069

Partners' Capital - Narrative (

Partners' Capital - Narrative (Details)	6 Months Ended
	Jun. 30, 2019shares
Limited Partners' Capital Account [Line Items]
Common limited partner units (in shares)	38,863,389
Martin Operating Partnership L.P.
Limited Partners' Capital Account [Line Items]
Ownership interest	98.00%
General partner interest percentage	2.00%
Martin Resource Management Corporation | Martin Resource Management
Limited Partners' Capital Account [Line Items]
Voting interest percentage	51.00%
Martin Resource Management Corporation | Martin Resource Management
Limited Partners' Capital Account [Line Items]
Voting interest percentage	51.00%
Martin Resource Management Corporation | Martin Operating Partnership L.P. | Martin Resource Management
Limited Partners' Capital Account [Line Items]
Common limited partner units (in shares)	6,114,532
Ownership interest	15.70%
MMGP | Martin Operating Partnership L.P. | Martin Resource Management
Limited Partners' Capital Account [Line Items]
General partner interest percentage	2.00%

Partners' Capital - Incentive D

Partners' Capital - Incentive Distribution Rights and Distributions of Available Cash (Details) - USD ($)	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Limited Partners' Capital Account [Line Items]
Distribution period	45 days
MMGP
Limited Partners' Capital Account [Line Items]
Incentive distribution	$ 0	$ 0
MMGP | Target Level 1
Limited Partners' Capital Account [Line Items]
Target cash distribution, percent	2.00%
MMGP | Target Level 2
Limited Partners' Capital Account [Line Items]
Target cash distribution, percent	15.00%
Target cash distribution (USD per share)	$ 0.625
MMGP | Target Level 3
Limited Partners' Capital Account [Line Items]
Target cash distribution, percent	25.00%
Target cash distribution (USD per share)	$ 0.75
MMGP | Target Level 4
Limited Partners' Capital Account [Line Items]
Target cash distribution, percent	50.00%
Minimum | MMGP | Target Level 1
Limited Partners' Capital Account [Line Items]
Target cash distribution (USD per share)	$ 0.50
Minimum | MMGP | Target Level 2
Limited Partners' Capital Account [Line Items]
Target cash distribution (USD per share)	0.55
Minimum | MMGP | Target Level 3
Limited Partners' Capital Account [Line Items]
Target cash distribution (USD per share)	0.625
Minimum | MMGP | Target Level 4
Limited Partners' Capital Account [Line Items]
Target cash distribution (USD per share)	0.75
Maximum | MMGP | Target Level 1
Limited Partners' Capital Account [Line Items]
Target cash distribution (USD per share)	$ 0.55
Martin Operating Partnership L.P.
Limited Partners' Capital Account [Line Items]
General partner interest percentage	2.00%
Martin Operating Partnership L.P. | MMGP
Limited Partners' Capital Account [Line Items]
General partner interest percentage	2.00%

Partners' Capital - Net Income

Partners' Capital - Net Income Per Unit (Details) - USD ($) $ in Thousands	3 Months Ended			6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018		Jun. 30, 2019	Jun. 30, 2018
Schedule of Reconciliation of Net Income from Continuing and Discontinuing Operations [Line Items]
Loss from continuing operations	$ (10,614)	$ (9,453)	[1]	$ (15,372)	$ (1,504)	[1],[2]
Less pre-acquisition (income) allocated to the general partner	0	(2,720)	[1]	0	(4,938)	[1]
Income (loss) from discontinued operations	(180,568)	4,927	[1]	(179,466)	12,014	[1],[2]
Less general partner’s interest in net income (loss):
Less loss allocable to unvested restricted units	65	6	[1]	67	(2)	[1]
Limited partners’ interest in net income (loss)	$ (187,293)	$ (7,095)	[1],[3]	$ (190,874)	$ 5,459	[1],[3]
Basic weighted average limited partner units outstanding (in shares)	38,871,420	38,722,037	[3]	38,912,250	38,828,845	[3]
Dilutive effect of restricted units issued (in shares)	0	0		0	5,576
Total weighted average limited partner diluted units outstanding (in shares)	38,871,420	38,722,037	[3]	38,912,250	38,834,421	[3]
Continuing operations
Less general partner’s interest in net income (loss):
Distributions payable on behalf of general partner interest	$ 11	$ 819		$ 31	$ (112)
General partner interest in undistributed loss	(223)	(1,122)		(338)	96
Less loss allocable to unvested restricted units	(4)	(13)		(5)	0
Limited partners’ interest in net income (loss)	(10,398)	(11,857)		(15,060)	(6,426)
Discontinued operations
Less general partner’s interest in net income (loss):
Distributions payable on behalf of general partner interest	185	(427)		362	896
General partner interest in undistributed loss	(3,797)	585		(3,952)	(769)
Less loss allocable to unvested restricted units	(61)	7		(62)	2
Limited partners’ interest in net income (loss)	$ (176,895)	$ 4,762		$ (175,814)	$ 11,885
[1]	Financial information for 2018 has been revised to include results attributable to MTI acquired from Martin Resource Management Corporation. See Note 1 – Nature of Operations and Basis of Presentation.
[2]	Financial information for 2018 has been revised to include results attributable to MTI acquired from Martin Resource Management Corporation. See Note 1 – Nature of Operations and Basis of Presentation.
[3]	Financial information for 2018 has been revised to include results attributable to MTI acquired from Martin Resource Management Corporation. See Note 1 – Nature of Operations and Basis of Presentation.

Unit Based Awards - Schedule of

Unit Based Awards - Schedule of Compensation Costs (Details) - Selling, General and Administrative Expenses - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total unit-based compensation expense	$ 363	$ 388	$ 715	$ 520
Employees
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total unit-based compensation expense	300	345	629	441
Non-employee directors
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total unit-based compensation expense	$ 63	$ 43	$ 86	$ 79

Unit Based Awards - Narrative (

Unit Based Awards - Narrative (Details) $ in Thousands	Jan. 24, 2023shares	Jan. 24, 2022shares	Jan. 24, 2021shares	Jan. 24, 2020shares	Feb. 11, 2019directorshares	Mar. 01, 2018shares	Jun. 30, 2019USD ($)shares	May 26, 2017shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized (in shares)								3,000,000
Restricted Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vested, number of units (in shares)							107,762
Unrecognized compensation cost related to non-vested restricted units | $							$ 2,462
Weighted average period for recognition (in years)							2 years 3 days
Restricted Units | Employees
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period (in years)							3 years
Restricted Units | Non-employee directors
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period (in years)							4 years
Time Based Restricted Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period (in years)							3 years
Granted, number of units (in shares)							16,944
Number of independent directors receiving grants | director					3
Time Based Restricted Units | Employees
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted, number of units (in shares)						301,550
Time Based Restricted Units | Non-employee directors
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted, number of units (in shares)					5,648
Performance Based Restricted Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period (in years)							3 years
Performance Based Restricted Units | Employees
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted, number of units (in shares)						317,925
Scenario, Forecast | Time Based Restricted Units | Non-employee directors
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vested, number of units (in shares)	1,412	1,412	1,412	1,412

Unit Based Awards - Restricted

Unit Based Awards - Restricted Unit Activity (Details) $ / shares in Units, $ in Thousands	6 Months Ended
	Jun. 30, 2019USD ($)$ / sharesshares
Restricted Units
Number of Units
Non-vested, beginning of period, number of units (in shares) | shares	624,125
Vested, number of units (in shares) | shares	(107,762)
Forfeited, number of units (in shares) | shares	(154,288)
Non-vested, end of period, number of units (in shares) | shares	379,019
Weighted Average Grant-Date Fair Value Per Unit
Non-vested, beginning of period, weighted average grant-date fair value per unit (USD per share) | $ / shares	$ 13.78
Vested, weighted average grant-date fair value per unit (USD per share) | $ / shares	13.82
Forfeited, weighted average grant-date fair value per unit (USD per share) | $ / shares	13.90
Non-vested, end of period, weighted average grant-date fair value per unit (USD per share) | $ / shares	$ 13.91
Aggregate intrinsic value, end of period | $	$ 2,706
Time Based Restricted Units
Number of Units
Granted, number of units (in shares) | shares	16,944
Weighted Average Grant-Date Fair Value Per Unit
Granted, weighted average grant-date fair value per unit (USD per share) | $ / shares	$ 12.45

Unit Based Awards - Intrinsic a

Unit Based Awards - Intrinsic and Fair Value (Details) - Restricted Units - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Aggregate intrinsic value of units vested	$ 0	$ 0	$ 1,351	$ 1,188
Fair value of units vested	$ 0	$ 0	$ 1,551	$ 2,232

Related Party Transactions - Na

Related Party Transactions - Narrative (Details)	6 Months Ended
	Jun. 30, 2019shares
Related Party Transaction [Line Items]
Common limited partner units (in shares)	38,863,389
Martin Resource Management Corporation | Martin Resource Management
Related Party Transaction [Line Items]
Voting interest percentage	51.00%
Martin Operating Partnership L.P.
Related Party Transaction [Line Items]
Ownership interest	98.00%
General partner interest percentage	2.00%
Martin Operating Partnership L.P. | Martin Resource Management Corporation | Martin Resource Management
Related Party Transaction [Line Items]
Common limited partner units (in shares)	6,114,532
Ownership interest	15.70%
Martin Operating Partnership L.P. | MMGP | Martin Resource Management
Related Party Transaction [Line Items]
General partner interest percentage	2.00%

Related Party Transactions - Om

Related Party Transactions - Omnibus Agreement (Details) - Omnibus Agreement - Martin Resource Management - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2019
Related Party Transaction [Line Items]
Noncompete restriction threshold	$ 5,000,000		$ 5,000,000
Noncompete restriction ownership option opportunity threshold minimum	5,000,000		5,000,000
Noncompete restriction ownership option opportunity threshold minimum with equity limitation	$ 5,000,000		$ 5,000,000
Equity limitation on ownership restriction percentage	20.00%		20.00%
Indirect expenses reimbursed	$ 4,164,000	$ 4,104,000	$ 8,328,000	$ 8,208,000
Subsequent Event | Scenario, Forecast
Related Party Transaction [Line Items]
Approved annual reimbursements for indirect expenses					$ 16,657,000

Related Party Transactions - Ma

Related Party Transactions - Master Transportation Services Agreement (Details)	6 Months Ended
	Jun. 30, 2019
Master Transportation Services Agreement | Martin Resource Management
Related Party Transaction [Line Items]
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, 2019
Related Party Transaction [Line Items]
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, 2019
Martin Resource Management Corporation
Related Party Transaction [Line Items]
Termination written notice, minimum (in days)	60 days

Related Party Transactions - Ot

Related Party Transactions - Other Agreements (Details) - Martin Resource Management	6 Months Ended
	Jun. 30, 2019bbl
Cross Tolling Agreement
Related Party Transaction [Line Items]
Production minimum per day (in bbl)	6,500
Annual escalation benchmark percentage	3.00%
Sulfuric Acid Sales Agency Agreement
Related Party Transaction [Line Items]
Partnership notice period to terminate agreement (in days)	90 days

Related Party Transactions - Sc

Related Party Transactions - Schedule of the Impact of Related Party Transactions (Details) - Related Party - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Revenues:
Revenue from related parties	$ 23,619	$ 27,928	$ 48,655	$ 55,253
Cost of products sold:
Cost of products sold	10,087	9,581	18,570	18,008
Operating expenses:
Operating expenses	24,407	23,758	46,943	46,846
Selling, general and administrative:
Selling, general and administrative	8,558	6,692	17,093	14,618
Terminalling and storage
Operating expenses:
Operating expenses	4,632	4,589	9,239	9,092
Transportation
Operating expenses:
Operating expenses	16,319	15,445	31,299	30,492
Natural gas liquids
Operating expenses:
Operating expenses	2,054	2,232	4,079	4,431
Sulfur services
Operating expenses:
Operating expenses	1,402	1,492	2,326	2,831
Operating segments | Terminalling and storage
Selling, general and administrative:
Selling, general and administrative	737	662	1,454	1,343
Operating segments | Transportation
Selling, general and administrative:
Selling, general and administrative	1,729	229	3,457	442
Operating segments | Natural gas liquids
Selling, general and administrative:
Selling, general and administrative	1,128	1,025	2,317	3,279
Operating segments | Sulfur services
Selling, general and administrative:
Selling, general and administrative	710	660	1,426	1,319
Indirect, including overhead allocation
Selling, general and administrative:
Selling, general and administrative	4,254	4,116	8,439	8,235
Terminalling and storage | Terminalling and storage
Revenues:
Revenue from related parties	17,477	20,485	36,449	40,493
Transportation | Transportation
Revenues:
Revenue from related parties	5,856	7,066	11,499	13,759
Product sales
Revenues:
Revenue from related parties	286	377	707	1,001
Sulfur services | Sulfur services
Revenues:
Revenue from related parties	9	226	16	612
Cost of products sold:
Cost of products sold	2,884	2,492	5,458	5,340
Terminalling and storage | Terminalling and storage
Revenues:
Revenue from related parties	277	151	691	389
Cost of products sold:
Cost of products sold	$ 7,203	$ 7,089	$ 13,112	$ 12,668

Business Segments (Details)

Business Segments (Details) $ in Thousands	3 Months Ended			6 Months Ended
	Jun. 30, 2019USD ($)	Jun. 30, 2018USD ($)		Jun. 30, 2019USD ($)segment	Jun. 30, 2018USD ($)		Dec. 31, 2018USD ($)
Segment Reporting [Abstract]
Number of reportable segments | segment				4
Segment Reporting Information [Line Items]
Total revenue	$ 187,323	$ 227,164	[1]	$ 427,356	$ 518,882	[1]
Depreciation and amortization	15,087	16,946	[1]	29,988	32,258	[1],[2]
Operating Income (Loss) after Eliminations	5,010	4,489	[1]	14,616	25,317	[1]
Capital Expenditures and Plant Turnaround Costs	8,627	6,578		18,926	20,160
Total assets:
Total assets	700,508			700,508			$ 1,073,628	[3]
Terminalling and storage
Segment Reporting Information [Line Items]
Total revenue	52,748	60,862		106,919	121,372
Depreciation and amortization	7,826	11,690		15,663	21,849
Operating Income (Loss) after Eliminations	4,254	2,653		9,069	6,349
Capital Expenditures and Plant Turnaround Costs	3,668	2,471		9,013	4,592
Total assets:
Total assets	317,325			317,325			298,784
Transportation
Segment Reporting Information [Line Items]
Total revenue	41,321	37,206		79,116	71,565
Depreciation and amortization	3,778	2,550		7,348	5,016
Operating Income (Loss) after Eliminations	(2,629)	(3,087)		(6,509)	(8,126)
Capital Expenditures and Plant Turnaround Costs	746	2,883		3,207	12,566
Total assets:
Total assets	180,821			180,821			146,529
Sulfur services
Segment Reporting Information [Line Items]
Total revenue	35,856	38,471		67,449	76,158
Depreciation and amortization	2,854	2,086		5,722	4,150
Operating Income (Loss) after Eliminations	7,528	6,257		13,908	16,423
Capital Expenditures and Plant Turnaround Costs	3,273	966		5,479	2,514
Total assets:
Total assets	118,384			118,384			115,498
Natural gas liquids
Segment Reporting Information [Line Items]
Total revenue	57,398	90,625		173,872	249,787
Depreciation and amortization	629	620		1,255	1,243
Operating Income (Loss) after Eliminations	456	3,012		7,314	19,248
Capital Expenditures and Plant Turnaround Costs	940	258		1,227	488
Total assets:
Total assets	83,978			83,978			$ 512,817
Operating Revenues
Segment Reporting Information [Line Items]
Total revenue	194,838	234,981		443,983	535,751
Operating Revenues | Terminalling and storage
Segment Reporting Information [Line Items]
Total revenue	54,351	62,314		110,243	124,297
Operating Revenues | Transportation
Segment Reporting Information [Line Items]
Total revenue	47,233	43,553		92,419	85,490
Operating Revenues | Sulfur services
Segment Reporting Information [Line Items]
Total revenue	35,856	38,471		67,449	76,158
Operating Revenues | Natural gas liquids
Segment Reporting Information [Line Items]
Total revenue	57,398	90,643		173,872	249,806
Intersegment Revenues Eliminations
Segment Reporting Information [Line Items]
Total revenue	(7,515)	(7,817)		(16,627)	(16,869)
Intersegment Revenues Eliminations | Terminalling and storage
Segment Reporting Information [Line Items]
Total revenue	(1,603)	(1,452)		(3,324)	(2,925)
Intersegment Revenues Eliminations | Transportation
Segment Reporting Information [Line Items]
Total revenue	(5,912)	(6,347)		(13,303)	(13,925)
Intersegment Revenues Eliminations | Sulfur services
Segment Reporting Information [Line Items]
Total revenue	0	0		0	0
Intersegment Revenues Eliminations | Natural gas liquids
Segment Reporting Information [Line Items]
Total revenue	0	(18)		0	(19)
Indirect selling, general and administrative
Segment Reporting Information [Line Items]
Depreciation and amortization	0	0		0	0
Operating Income (Loss) after Eliminations	(4,599)	(4,346)		(9,166)	(8,577)
Capital Expenditures and Plant Turnaround Costs	$ 0	$ 0		$ 0	$ 0
[1]	Financial information for 2018 has been revised to include results attributable to MTI acquired from Martin Resource Management Corporation. See Note 1 – Nature of Operations and Basis of Presentation.
[2]	Financial information for 2018 has been revised to include results attributable to MTI acquired from Martin Resource Management Corporation. See Note 1 – Nature of Operations and Basis of Presentation.
[3]	Financial information for 2018 has been revised to include results attributable to MTI acquired from Martin Resource Management Corporation. See Note 1 – Nature of Operations and Basis of Presentation.

Fair Value Measurements (Detail

Fair Value Measurements (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Commodity derivative contracts, net	$ (2,069)	$ 0	[1]
Recurring | Level 2 | Commodity contracts
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Commodity derivative contracts, net	(2,069)
Commodity derivative contracts, net		4
Nonrecurring | 2021 Senior unsecured notes | Carrying Value
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
2021 Senior unsecured notes	373,185	372,996
Nonrecurring | 2021 Senior unsecured notes | Fair Value
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
2021 Senior unsecured notes	$ 371,534	$ 360,138
[1]	Financial information for 2018 has been revised to include results attributable to MTI acquired from Martin Resource Management Corporation. See Note 1 – Nature of Operations and Basis of Presentation.

Income Taxes - Income Tax Expen

Income Taxes - Income Tax Expense (Details) - USD ($) $ in Thousands	3 Months Ended			6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018		Jun. 30, 2019	Jun. 30, 2018
Income Tax Disclosure [Abstract]
Provision for income taxes	$ 639	$ 132	[1]	$ 1,335	$ 281	[1]
[1]	Financial information for 2018 has been revised to include results attributable to MTI acquired from Martin Resource Management Corporation. See Note 1 – Nature of Operations and Basis of Presentation.

Income Taxes - Narrative (Detai

Income Taxes - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended			6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018		Jun. 30, 2019	Jun. 30, 2018		Jan. 02, 2019
Income Tax Contingency [Line Items]
Income tax expense	$ 639	$ 132	[1]	$ 1,335	$ 281	[1]
Effective income tax rate percentage	26.30%	0.00%		25.49%	0.00%
Deferred taxes	$ 487	$ 0		$ 856	$ 0	[2]
Deferred tax asset	23,925	0		23,925	0
Marting Transport Inc.
Income Tax Contingency [Line Items]
Income tax expense	429	0		877	0
Current federal income tax expense	(78)	0		218	0
State income tax expense (benefit)	$ 20	0		$ (198)	0
Martin Transport Inc
Income Tax Contingency [Line Items]
Income tax expense		$ 0			$ 0
Acquisition, deferred income taxes							$ 24,781
[1]	Financial information for 2018 has been revised to include results attributable to MTI acquired from Martin Resource Management Corporation. See Note 1 – Nature of Operations and Basis of Presentation.
[2]	Financial information for 2018 has been revised to include results attributable to MTI acquired from Martin Resource Management Corporation. See Note 1 – Nature of Operations and Basis of Presentation.

Subsequent Events (Details)

Subsequent Events (Details) - USD ($)	Jul. 18, 2019	Jul. 17, 2019	Jun. 30, 2019
Subsequent Event
Subsequent Event [Line Items]
Dividends declared (USD per share)	$ 0.25
Estimated annualized dividends (USD per share)	$ 1
Revolving Loan Facility
Subsequent Event [Line Items]
Face amount			$ 500,000,000
Revolving Loan Facility | Subsequent Event
Subsequent Event [Line Items]
Face amount	$ 400,000,000	$ 500,000,000