Zenith Energy Logistics Partners (ARCX) 10-Q 7 May 15 2015 Q1 Quarterly report Financial data

Document_and_Entity_Informatio

Document and Entity Information	3 Months Ended
	Mar. 31, 2015	4-May-15
Document And Entity Information [Line Items]
Document Type	10-Q
Amendment Flag	FALSE
Document Period End Date	31-Mar-15
Document Fiscal Year Focus	2015
Document Fiscal Period Focus	Q1
Trading Symbol	ARCX
Entity Registrant Name	Arc Logistics Partners LP
Entity Central Index Key	1583744
Current Fiscal Year End Date	-19
Entity Filer Category	Accelerated Filer
Common Units [Member]
Document And Entity Information [Line Items]
Entity Common Stock, Shares Outstanding		6,867,950
Subordinated Units [Member]
Document And Entity Information [Line Items]
Entity Common Stock, Shares Outstanding		6,081,081

Condensed_Consolidated_Balance

Condensed Consolidated Balance Sheets (Unaudited) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified
Current assets:
Cash and cash equivalents	$4,445	$6,599
Trade accounts receivable	3,942	3,746
Due from related parties	946	900
Inventories	349	285
Other current assets	1,673	1,226
Total current assets	11,355	12,756
Property, plant and equipment, net	195,585	195,886
Investment in unconsolidated affiliate	73,333	72,858
Intangible assets, net	32,021	33,189
Goodwill	15,162	15,162
Other assets	2,029	1,737
Total assets	329,485	331,588
Current liabilities:
Accounts payable	2,025	2,136
Accrued expenses	1,820	2,133
Due to general partner	2,691	409
Other liabilities	32	34
Total current liabilities	6,568	4,712
Credit facility	111,063	111,063
Other non-current liabilities	2,944	2,747
Commitments and contingencies
Partners’ capital:
General partner interest	0	0
Limited partners’ interest
Accumulated other comprehensive (loss) income	-123	348
Total partners’ capital	208,910	213,066
Total liabilities and partners’ capital	329,485	331,588
Common Units [Member]
Limited partners’ interest
Limited partners' units	117,796	119,130
Subordinated Units [Member]
Limited partners’ interest
Limited partners' units	$91,237	$93,588

Condensed_Consolidated_Balance1

Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical)	Mar. 31, 2015	Dec. 31, 2014
Common Units [Member]
Limited partners' units issued	6,867,950	6,867,950
Limited partners' units outstanding	6,867,950	6,867,950
Subordinated Units [Member]
Limited partners' units issued	6,081,081	6,081,081
Limited partners' units outstanding	6,081,081	6,081,081

Condensed_Consolidated_Stateme

Condensed Consolidated Statements of Operations and Comprehensive Income (Unaudited) (USD $)	3 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Revenues:
Third-party customers	$11,379	$10,875
Related parties	2,178	2,338
Revenues	13,557	13,213
Expenses:
Operating expenses	6,280	7,132
Selling, general and administrative	4,298	1,776
Selling, general and administrative – affiliate	1,076	884
Depreciation	1,844	1,698
Amortization	1,246	1,339
Total expenses	14,744	12,829
Operating (loss) income	-1,187	384
Other income (expense):
Equity earnings from unconsolidated affiliate	2,489	2,437
Other income	5
Interest expense	-951	-910
Total other income, net	1,543	1,527
Income before income taxes	356	1,911
Income taxes	52	50
Net income attributable to partners’ capital	304	1,861
Other comprehensive loss	-471	-88
Comprehensive (loss) income attributable to partners’ capital	($167)	$1,773
Common Units [Member]
Earnings per limited partner unit:
Earnings per limited partner unit, basic and diluted	$0.01	$0.14
Subordinated Units [Member]
Earnings per limited partner unit:
Earnings per limited partner unit, basic and diluted	$0.01	$0.14

Condensed_Consolidated_Stateme1

Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Cash flow from operating activities:
Net income	$304	$1,861
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Depreciation	1,844	1,698
Amortization	1,246	1,339
Equity earnings from unconsolidated affiliate, net of distributions	-714	-686
Amortization of deferred financing costs	96	94
Unit-based compensation	1,535
Changes in operating assets and liabilities:
Trade accounts receivable	-196	423
Due from related parties	-45	-183
Inventories	-64	27
Other current assets	-447	-347
Other assets		-1
Accounts payable	-321	-517
Accrued expenses	-314	-412
Due to general partner	2,282	87
Other liabilities	197	1,112
Net cash provided by operating activities	5,403	4,495
Cash flows from investing activities:
Capital expenditures	-1,334	-1,800
Investment in unconsolidated affiliate	-310	-165
Net cash used in investing activities	-1,644	-1,965
Cash flows from financing activities:
Distributions	-5,309	-2,673
Deferred financing costs	-389	-195
Distribution equivalent rights paid on unissued units	-215
Net cash used in financing activities	-5,913	-2,868
Net decrease in cash and cash equivalents	-2,154	-338
Cash and cash equivalents, beginning of period	6,599	4,454
Cash and cash equivalents, end of period	4,445	4,116
Supplemental disclosure of cash flow information:
Cash paid for interest	906	856
Cash paid for income taxes	52	50
Non-cash investing and financing activities:
Increase in purchases of property plant and equipment in accounts payable and accrued expenses	$209	$243

Condensed_Consolidated_Stateme2

Condensed Consolidated Statements of Partners' Capital (Unaudited) (USD $)	Total	Limited Partner Common Interest [Member]	Limited Partner Subordinated Interest [Member]	Accumulated Other Comprehensive Income [Member]
In Thousands
Partners' capital, beginning balance at Dec. 31, 2014	$213,066	$119,130	$93,588	$348
Net income	304	162	142
Other comprehensive income	-471			-471
Unit-based compensation	1,535	1,535
Distribution equivalent rights paid on unissued units	-215	-215
Distributions	-5,309	-2,816	-2,493
Partners' capital, ending balance at Mar. 31, 2015	$208,910	$117,796	$91,237	($123)

Organization_and_Presentation

Organization and Presentation	3 Months Ended
	Mar. 31, 2015
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Organization and Presentation	Note 1—Organization and Presentation
	Defined Terms
	Unless the context clearly indicates otherwise, references in these unaudited condensed consolidated financial statements (“interim statements”) to “Arc Logistics” or the “Partnership” refer to Arc Logistics Partners LP and its subsidiaries. Unless the context clearly indicates otherwise, references to our “General Partner” refer to Arc Logistics GP LLC, the general partner of Arc Logistics. References to “Sponsor” or “Lightfoot” refer to Lightfoot Capital Partners, LP and its general partner, Lightfoot Capital Partners GP LLC. References to “GCAC” refer to Gulf Coast Asphalt Company, L.L.C., which contributed its preferred units in Arc Terminals LP, predecessor to Arc Logistics (“Arc Terminals”), to the Partnership upon the consummation of the Partnership’s initial public offering in November 2013 (“IPO”). References to “Center Oil” refer to GP&W, Inc., d.b.a. Center Oil, and affiliates, including Center Terminal Company-Cleveland, which contributed its limited partner interests in Arc Terminals to the Partnership upon the consummation of the IPO. References to “Gulf LNG Holdings” refer to Gulf LNG Holdings Group, LLC and its subsidiaries, which own a liquefied natural gas regasification and storage facility in Pascagoula, MS, which is referred to herein as the “LNG Facility.” The Partnership owns a 10.3% limited liability company interest in Gulf LNG Holdings, which is referred to herein as the “LNG Interest.”
	Organization
	The Partnership is a fee-based, growth-oriented Delaware limited partnership formed by Lightfoot in 2007 to own, operate, develop and acquire a diversified portfolio of complementary energy logistics assets. The Partnership is principally engaged in the terminalling, storage, throughput and transloading of crude oil and petroleum products. The Partnership is focused on growing its business through the optimization, organic development and acquisition of terminalling, storage, rail, pipeline and other energy logistics assets that generate stable cash flows.
	In November 2013, the Partnership completed its IPO by selling 6,786,869 common units (which includes 786,869 common units issued pursuant to the exercise of the underwriters’ over-allotment option) representing limited partner interests in the Partnership at a price to the public of $19.00 per common unit.  Our common units are listed on the New York Stock Exchange under the symbol “ARCX.”
	As of March 31, 2015, our Sponsor owned 68,617 common units and 5,146,264 subordinated units representing a 40.3% limited partner interest in us.  Our Sponsor also owns and controls our General Partner, which maintains a non-economic general partner interest in us and owns the incentive distribution rights.

Summary_of_Significant_Account

Summary of Significant Accounting Policies	3 Months Ended
	Mar. 31, 2015
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	Note 2—Summary of Significant Accounting Policies
	The Partnership has provided a discussion of significant accounting policies in its Annual Report on Form 10-K for the year ended December 31, 2014. Certain items from that discussion are repeated or updated below as necessary to assist in the understanding of these interim statements.
	Basis of Presentation
	The accompanying interim statements of the Partnership have been prepared in accordance with GAAP for interim financial information and with the instructions to Form 10-Q and Article 10 of Regulation S-X issued by the SEC. Accordingly, they do not include all of the information and footnotes required by GAAP for complete financial statements. In the opinion of management, all adjustments, consisting only of normal recurring adjustments and disclosures necessary for a fair presentation of these interim statements have been included. The results reported in these interim statements are not necessarily indicative of the results that may be reported for the entire year or for any other period. These interim statements should be read in conjunction with the Partnership’s consolidated financial statements for the year ended December 31, 2014, which are included in the Partnership’s Annual Report on Form 10-K, as filed with the SEC. The year-end balance sheet data was derived from the audited financial statements, but does not include all disclosures required by GAAP.
	Use of Estimates
	The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements. The most significant estimates relate to the valuation of acquired businesses, goodwill and intangible assets, assessment for impairment of long-lived assets and the useful lives of intangible assets and property, plant and equipment. Actual results could differ from those estimates.
	Impairment of Long-Lived Assets
	Long-lived assets are reviewed for impairment whenever events or changes in circumstances indicate that the carrying amount of an asset may not be recoverable. Recoverability of assets to be held and used is measured by a comparison of the carrying amount of an asset to the estimated undiscounted future cash flows expected to be generated by the asset. If the carrying amount of an asset exceeds its estimated future cash flows, an impairment charge is recognized for the amount by which the carrying amount of the asset exceeds the estimated fair value of the asset. Assets to be disposed of are separately presented in the balance sheet and reported at the lower of the carrying amount or fair value less costs to sell and are no longer depreciated.
	No impairment charges were recorded during the three months ended March 31, 2015. Refer to “Note 5—Property, Plant and Equipment” for discussion on impairments recorded during the year ended December 31, 2014.
	Goodwill
	Goodwill represents the excess of consideration paid over the fair value of net assets acquired in a business combination. Goodwill is not amortized but instead is assessed for impairment at least annually or when facts and circumstances warrant. The Partnership determined at December 31, 2014 that there were no impairment charges and subsequent to that date no event indicating an impairment has occurred.
	A summary of the changes in the carrying amount of goodwill is as follows (in thousands):
		As of
		March 31,		December 31,
		2015		2014
	Beginning Balance	$	15,162	$	15,162
	Goodwill acquired		-		-
	Impairment		-		-
	Ending Balance	$	15,162	$	15,162
	Deferred Rent
	The Lease Agreement (as defined in “Note 11—Related Party Transactions—Other Transactions with Related Persons—Operating Lease Agreement” below) contains certain rent escalation clauses, contingent rent provisions and lease termination payments. The Partnership recognizes rent expense for operating leases on a straight-line basis over the term of the lease, taking into consideration the items noted above. Contingent rental payments are generally recognized as rent expense as incurred. The deferred rent resulting from the recognition of rent expense on a straight-line basis related to the Lease Agreement is included within “Other non-current liabilities” in the accompanying unaudited condensed consolidated balance sheet at March 31, 2015 and December 31, 2014.
	Revenue Recognition
	Revenues from leased tank storage and delivery services are recognized as the services are performed, evidence of a contractual arrangement exists and collectability is reasonably assured. Revenues also include the sale of excess products and additives which are mixed with customer-owned liquid products. Revenues for the sale of excess products and additives are recognized when title and risk of loss passes to the customer.
	Fair Value of Financial Instruments
	Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at a specified measurement date. Fair value measurements are derived using inputs and assumptions that market participants would use in pricing an asset or liability, including assumptions about risk. GAAP establishes a valuation hierarchy for disclosure of the inputs to valuation used to measure fair value. This three-tier hierarchy classifies fair value amounts recognized or disclosed in the condensed consolidated financial statements based on the observability of inputs used to estimate such fair values. The classification within the hierarchy of a financial asset or liability is determined based on the lowest level input that is significant to the fair value measurement. The hierarchy considers fair value amounts based on observable inputs (Level 1 and 2) to be more reliable and predictable than those based primarily on unobservable inputs (Level 3). At each balance sheet reporting date, the Partnership categorizes its financial assets and liabilities using this hierarchy.
	The amounts reported in the balance sheet for cash equivalents, accounts receivable, accounts payable and accrued liabilities approximate their fair value because of the short-term maturities of these instruments (Level 1). Because the Credit Facility (as defined in “Note 7 – Debt – Credit Facility” below) has a market rate of interest, its carrying amount approximated fair value (Level 2).
	The Partnership believes that its valuation methods are appropriate and consistent with the values that would be determined by other market participants. However, the use of different methodologies or assumptions to determine fair value of certain financial instruments could result in a different estimate of fair value at the reporting date.
	Unit-Based Compensation
	The Partnership recognizes all unit-based compensation to directors, officers, employees and other service providers in the consolidated financial statements based on the fair value of the awards.  Fair value for unit-based awards classified as equity awards is determined on the grant date of the award, and this value is recognized as compensation expense ratably over the requisite service or performance period of the equity award. Fair value for equity awards is calculated at the closing price of the common units on the grant date. Fair value for unit-based awards classified as liability awards is calculated at the closing price of the common units on the grant date and is remeasured at each reporting period until the award is settled. Compensation expense related to unit-based awards is included in the “Selling, general and administrative” line item in the accompanying unaudited condensed consolidated statements of operations and comprehensive income.
	For awards with performance conditions, the expense is accrued over the service period only if the performance condition is considered to be probable of occurring. When awards with performance conditions that were previously considered improbable become probable, the Partnership incurs additional expense in the period that the probability assessment changes (see “Note 9—Equity Plans”).
	Net Income Per Unit
	The Partnership uses the two-class method in the computation of earnings per unit since there is more than one participating class of securities. Earnings per common and subordinated unit are determined by dividing net income allocated to the common units and subordinated units, respectively, after deducting the amount allocated to the phantom unitholders, if any, by the weighted average number of outstanding common and subordinated units, respectively, during the period. The overall computation, presentation and disclosure of the Partnership’s limited partners’ net income per unit are made in accordance with the Financial Accounting Standards Board (“FASB”) Accounting Standards Codification (“ASC”) Topic 260 “Earnings per Share.”
	Segment Reporting
	The Partnership derives revenue from operating its terminal and transloading facilities.  These facilities have been aggregated into one reportable segment because the facilities have similar long-term economic characteristics, products and types of customers.
	Recently Issued Accounting Pronouncements
	In May 2014, the FASB issued updated guidance on the reporting and disclosure of revenue recognition. The update requires that an entity recognize revenue to depict the transfer of goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. This update also requires new qualitative and quantitative disclosures about the nature, amount, timing and uncertainty of revenue and cash flows arising from customer contracts, including significant judgments and changes in judgments, information about contract balances and performance obligations, and assets recognized from costs incurred to obtain or fulfill a contract. The Partnership is currently evaluating the potential impact of this authoritative guidance on its financial condition, results of operations, cash flows and related disclosures.  In April 2015, the FASB proposed a one year deferral of the effective date, and therefore, this guidance will be effective for the Partnership beginning in the first quarter of 2018, with early adoption optional but not before the original effective date of December 15, 2016.
	In June 2014, the FASB issued new guidance related to stock compensation.  The new standard requires that a performance target that affects vesting, and that could be achieved after the requisite service period, be treated as a performance condition.  As such, the performance target should not be reflected in estimating the grant date fair value of the award.  This update further clarifies that compensation cost should be recognized in the period in which it becomes probable that the performance target will be achieved and should represent the compensation cost attributable to the periods for which the requisite service has already been rendered.  The Partnership does not expect this requirement to have a significant impact on its financial condition, results of operations, cash flows and related disclosures.  This guidance will be effective for the Partnership beginning in the first quarter of 2016, with early adoption optional.
	In February 2015, the FASB issued new guidance related to evaluating entities for inclusion in consolidations for both the variable interest model and for the voting model for limited partnerships and similar entities.  The update requires that all reporting entities reevaluate whether they should consolidate certain legal entities.  The Partnership does not expect this requirement to have a significant impact on its financial condition, results of operations, cash flows and related disclosures.  This guidance will be effective for the Partnership in the first quarter of 2016, with early adoption optional.
	In April 2015, the FASB issued new guidance related to presentation of debt issuance costs.  The update requires debt issuance costs to be presented in the balance sheet as a direct deduction from the carrying value of the associated debt liability, consistent with the presentation of a debt discount.  The Partnership is currently assessing the impact that adopting this new accounting guidance will have on its consolidated financial statements and disclosures.  This guidance will be effective for the Partnership in the first quarter of 2016, with early adoption optional.

Acquisitions

Acquisitions	3 Months Ended
	Mar. 31, 2015
Business Combinations [Abstract]
Acquisitions	Note 3 – Acquisitions
	Pending JBBR Acquisition
	In February 2015, Arc Terminals Joliet Holdings LLC, a Delaware limited liability company (“Buyer” or “Arc AcquisitionCo”), and a wholly owned subsidiary of the Partnership that will be, upon the closing of the JBBR Acquisition referred to below, owned jointly by the Partnership and an affiliate of GE Energy Financial Services (“GE EFS”), entered into a Membership Interest Purchase Agreement (the “JBBR Purchase Agreement”) pursuant to which Buyer has agreed, subject to the terms and conditions thereof, to acquire from CenterPoint Properties Trust (“Seller” or “CenterPoint”), for a base cash purchase price of $216 million, all of the  membership interests in Joliet Bulk, Barge & Rail LLC (“JBBR”; and such acquisition, the “JBBR Acquisition”), which among other things owns a crude oil unloading terminal and a 4-mile crude oil pipeline that are in the final stages of construction in Joliet, Illinois (the “Joliet Terminal”). Arc AcquisitionCo is also required to pay to CenterPoint earn-out payments for each barrel of petroleum product that is either delivered to or received from the Joliet Terminal (without duplication) or for which JBBR receives payment under minimum volume commitments regardless of actual throughput activity.  Arc AcquisitionCo’s earn-out obligations to CenterPoint will terminate upon the payment, in the aggregate, of $27 million.  In connection with the JBBR Acquisition, the Partnership has entered into a joint venture arrangement with GE EFS. Upon the closing of the JBBR Acquisition, an affiliate of GE EFS will own 40% of Buyer, with the remaining 60% owned by the Partnership. The Partnership will manage the ongoing operations of Buyer and its subsidiaries, including JBBR.

Investment_in_Unconsolidated_A

Investment in Unconsolidated Affiliate	3 Months Ended
	Mar. 31, 2015
Equity Method Investments And Joint Ventures [Abstract]
Investment in Unconsolidated Affiliate	Note 4—Investment in Unconsolidated Affiliate
	The Partnership accounts for investments in limited liability companies under the equity method of accounting unless the Partnership’s interest is deemed to be so minor that it may have virtually no influence over operating and financial policies. “Investment in unconsolidated affiliate” consisted of the LNG Interest, and its balances as of March 31, 2015 and December 31, 2014 are represented below (in thousands):
	Balance at December 31, 2014	$	72,858
	Equity earnings		2,489
	Contributions		310
	Distributions		(1,775	)
	Amortization of premium		(78	)
	Other comprehensive income		(471	)
	Balance at March 31, 2015	$	73,333
	Gulf LNG Holdings Acquisition
	In November 2013, the Partnership purchased the LNG Interest from an affiliate of GE EFS for approximately $72.7 million. The carrying value of the LNG Interest on the date of acquisition was approximately $64.1 million with a purchase price of approximately $72.7 million and the excess paid over the carrying value of approximately $8.6 million. This excess can be attributed to the underlying long lived assets of Gulf LNG Holdings and is therefore being amortized using the straight line method over the remaining useful lives of the respective assets, which is 28 years. The estimated aggregate amortization of this premium for its remaining useful life from March 31, 2015 is as follows (in thousands):
		Total
	2015	$	231
	2016		309
	2017		309
	2018		309
	2019		309
	Thereafter		6,753
		$	8,220
	Summarized financial information for the Gulf LNG Holdings is reported below (in thousands):
		March 31,			December 31,
		2015			2014
	Balance sheets
	Current assets	$	9,767		$	12,537
	Noncurrent assets		920,489			926,980
	Total assets	$	930,256		$	939,517
	Current liabilities	$	77,281		$	85,818
	Long-term liabilities		727,286			733,401
	Member’s equity		125,689			120,298
	Total liabilities and member’s equity	$	930,256		$	939,517
		Three Months Ended
		March 31,
		2015			2014
	Income statements
	Revenues	$	46,624		$	46,561
	Total operating costs and expenses		14,206			14,280
	Operating income		32,418			32,281
	Net income	$	24,165		$	23,656

Property_Plant_and_Equipment

Property, Plant and Equipment	3 Months Ended
	Mar. 31, 2015
Property Plant And Equipment [Abstract]
Property, Plant and Equipment	Note 5—Property, Plant and Equipment
	The Partnership’s property, plant and equipment consisted of (in thousands):
		As of
		March 31,			December 31,
		2015			2014
	Land	$	49,615		$	49,615
	Buildings and site improvements		36,356			36,298
	Tanks and trim		91,600			91,463
	Machinery and equipment		33,010			32,815
	Office furniture and equipment		2,353			2,348
	Construction in progress		7,323			6,175
			220,257			218,714
	Less:  Accumulated depreciation		(24,672	)		(22,828	)
	Property, plant and equipment, net	$	195,585		$	195,886
	Due to a change in the operating logistics at the Partnership’s Chillicothe, IL terminal (the “Chillicothe Terminal”) in April 2013, the Partnership evaluated the long-lived assets at the Chillicothe Terminal for impairment as of December 31, 2013 and December 31, 2014. Based upon a market strategy to repurpose the Chillicothe Terminal, the Partnership’s estimate of undiscounted cash flows as of December 31, 2013 indicated that such carrying amounts were expected to be recovered. The Partnership re-evaluated the Chillicothe Terminal and based upon the inability to enter into a service agreement with a new or existing customer, the Partnership recognized a non-cash impairment loss of approximately $6.1 million as of December 31, 2014. The net impact of this impairment was reflected in “Long-lived asset impairment” in the consolidated statement of operations and comprehensive income for the year ended December 31, 2014.

Intangible_Assets

Intangible Assets	3 Months Ended
	Mar. 31, 2015
Goodwill And Intangible Assets Disclosure [Abstract]
Intangible Assets
	Note 6—Intangible Assets
	The Partnership’s intangible assets consisted of (in thousands):
		Estimated	As of
		Useful Lives	March 31,			December 31,
		in Years	2015			2014
	Customer relationships	21	$	4,785		$	4,785
	Acquired contracts	10-Feb		39,900			39,900
	Noncompete agreements	3-Feb		741			741
				45,426			45,426
	Less:  Accumulated amortization			(13,405	)		(12,237	)
	Intangible assets, net		$	32,021		$	33,189
	The Partnership’s intangible assets are amortized on a straight-line basis over the expected life of each intangible asset. The estimated future amortization expense is approximately $3.1 million for the remainder of 2015, $3.9 million in 2016, $3.9 million in 2017, $3.9 million in 2018, $3.9 million in 2019 and $13.3 million thereafter.

Debt

Debt	3 Months Ended
	Mar. 31, 2015
Debt Disclosure [Abstract]
Debt	Note 7—Debt
	Credit Facility
	In November 2013, concurrent with the closing of the IPO, the Partnership entered into the Second Amended and Restated Revolving Credit Agreement (the “Credit Facility”) with a syndicate of lenders, under which Arc Terminals Holdings LLC, a wholly owned subsidiary of the Partnership (“Arc Terminals Holdings”) is the borrower. The Credit Facility has up to $175.0 million of borrowing capacity. As of March 31, 2015, the Partnership had borrowings of $111.1 million under the Credit Facility at an interest rate of 2.93%. As of March 31, 2015, the Partnership had a $10 million letter of credit outstanding under its letter of credit sub-facility, which was issued in connection with the JBBR Acquisition.   Based on the restrictions under the total leverage ratio covenant, as of March 31, 2015, the Partnership had $24.4 million of available capacity under the Credit Facility.
	The Credit Facility is available to fund working capital and to finance capital expenditures and other permitted payments and for other lawful corporate purposes and allows the Partnership to request that the maximum amount of the Credit Facility be increased by up to an aggregate principal amount of $100.0 million, subject to receiving increased commitments from lenders or commitments from other financial institutions. The Credit Facility is available for revolving loans, including a sublimit of $5.0 million for swing line loans and a sublimit of $10.0 million for letters of credit. The Partnership’s obligations under the Credit Facility are secured by a first priority lien on substantially all of the Partnership’s material assets (other than the LNG Interest). The Partnership and each of the Partnership’s existing restricted subsidiaries (other than the borrower) guarantee, and each of the Partnership’s future restricted subsidiaries will also guarantee, the Credit Facility. The Credit Facility matures in November 2018.
	Loans under the Credit Facility bear interest at a floating rate, based upon the Partnership’s total leverage ratio, equal to, at the Partnership’s option, either (a) a base rate plus a range from 100 to 200 basis points per annum or (b) a LIBOR rate, plus a range of 200 to 300 basis points. The base rate is established as the highest of (i) the rate which SunTrust Bank announces, from time to time, as its prime lending rate, (ii) the daily one-month LIBOR plus 100 basis points per annum and (iii) the federal funds rate plus 50 basis points per annum. The unused portion of the Credit Facility is subject to a commitment fee calculated based upon the Partnership’s total leverage ratio ranging from 0.375% to 0.50% per annum. Upon any event of default, the interest rate will, upon the request of the lenders holding a majority of the commitments, be increased by 2.0% on overdue amounts per annum for the period during which the event of default exists.
	The Credit Facility contains certain customary representations and warranties, affirmative covenants, negative covenants and events of default. As of March 31, 2015, the Partnership was in compliance with such covenants. The negative covenants include restrictions on the Partnership’s ability to incur additional indebtedness, acquire and sell assets, create liens, enter into certain lease agreements, make investments and make distributions.
	The Credit Facility requires the Partnership to maintain a total leverage ratio of not more than 4.50 to 1.00, which may increase to up to 5.00 to 1.00 during specified periods following a material permitted acquisition or issuance of over $200.0 million of senior notes, and a minimum interest coverage ratio of not less than 2.50 to 1.00. If the Partnership issues over $200.0 million of senior notes, the Partnership will be subject to an additional financial covenant pursuant to which the Partnership’s secured leverage ratio must not be more than 3.50 to 1.00. The Credit Facility places certain restrictions on the issuance of senior notes.
	If an event of default occurs, the agent would be entitled to take various actions, including the acceleration of amounts due under the Credit Facility, termination of the commitments under the Credit Facility and all remedial actions available to a secured creditor. The events of default include customary events for a financing agreement of this type, including, without limitation, payment defaults, material inaccuracies of representations and warranties, defaults in the performance of affirmative or negative covenants (including financial covenants), bankruptcy or related defaults, defaults relating to judgments, nonpayment of other material indebtedness and the occurrence of a change in control. In connection with the Credit Facility, the Partnership and the Partnership’s subsidiaries have entered into certain customary ancillary agreements and arrangements, which, among other things, provide that the indebtedness, obligations and liabilities arising under or in connection with the Credit Facility are unconditionally guaranteed by the Partnership and each of the Partnership’s existing restricted subsidiaries (other than the borrower) and each of the Partnership’s future restricted subsidiaries.
	In January 2014, Arc Terminals Holdings, as borrower, and Arc Logistics and its other subsidiaries, as guarantors, entered into the first amendment to the Credit Facility (the “First Amendment”). The First Amendment principally modified certain provisions of the Credit Facility to allow Arc Terminals Holdings to enter into the Lease Agreement relating to the use of petroleum products terminals and pipeline infrastructure located in Portland, Oregon (the “Portland Terminal”).
	Debt Financing
	In February 2015, our operating subsidiary, Arc Terminals Holdings, entered into the Debt Commitment Letter with SunTrust Bank and SunTrust Robinson Humphrey, Inc. (together with SunTrust Bank, “SunTrust”) (i) that sets forth the terms and conditions of an incremental senior secured credit facility (the “Incremental Facility”) consisting of an increase of the aggregate commitments under the Credit Facility from $175 million to $275 million and (ii) pursuant to which SunTrust agreed to provide 100% of a backstop senior secured credit facility of up to $275 million in order to refinance the Credit Facility in the event that the lenders under the Credit Facility fail to fund any portion of the Incremental Facility required to be funded in connection with the consummation of the JBBR Acquisition.

Partners_Capital_and_Distribut

Partners' Capital and Distributions	3 Months Ended
	Mar. 31, 2015
Equity [Abstract]
Partners' Capital and Distributions	Note 8—Partners’ Capital and Distributions
	Cash Distributions
	The table below summarizes the quarterly distributions related to the Partnership’s quarterly financial results (in thousands, except per unit data):
			Total Quarterly			Total Cash			Date of	Unitholders
	Quarter Ended		Distribution Per Unit			Distribution			Distribution	Record Date
	31-Mar-15		$	0.41		$	5,309		15-May-15	11-May-15
	31-Dec-14		$	0.41		$	5,309		17-Feb-15	9-Feb-15
	30-Sep-14		$	0.41		$	5,309		17-Nov-14	10-Nov-14
	30-Jun-14		$	0.4		$	5,180		18-Aug-14	11-Aug-14
	31-Mar-14		$	0.3875		$	5,018		16-May-14	9-May-14
	Cash Distribution Policy
	The partnership agreement provides that the General Partner will make a determination no less frequently than each quarter as to whether to make a distribution, but the partnership agreement does not require the Partnership to pay distributions at any time or in any amount. Instead, the board of directors of the General Partner (the “Board”) has adopted a cash distribution policy that sets forth the General Partner’s intention with respect to the distributions to be made to unitholders. Pursuant to the cash distribution policy, within 60 days after the end of each quarter, the Partnership expects to distribute to the holders of common and subordinated units on a quarterly basis at least the minimum quarterly distribution of $0.3875 per unit, or $1.55 per unit on an annualized basis, to the extent the Partnership has sufficient cash after establishment of cash reserves and payment of fees and expenses, including payments to the General Partner and its affiliates.
	The Board may change the foregoing distribution policy at any time and from time to time, and even if the cash distribution policy is not modified or revoked, the amount of distributions paid under the policy and the decision to make any distribution is determined solely by the General Partner. As a result, there is no guarantee that the Partnership will pay the minimum quarterly distribution, or any distribution, on the units in any quarter. However, the partnership agreement contains provisions intended to motivate the General Partner to make steady, increasing and sustainable distributions over time.
	The partnership agreement generally provides that the Partnership will distribute cash each quarter in the following manner:
	—	first, to the holders of common units, until each common unit has received the minimum quarterly distribution of $0.3875 plus any arrearages from prior quarters;
	—	second, to the holders of subordinated units, until each subordinated unit has received the minimum quarterly distribution of $0.3875; and
	—	third, to all unitholders pro rata, until each has received a distribution of $0.4456.
	If cash distributions to the Partnership’s unitholders exceed $0.4456 per unit in any quarter, the Partnership’s unitholders and the General Partner, as the initial holder of the incentive distribution rights, will receive distributions according to the following percentage allocations:
	Total Quarterly		Marginal Percentage
	Distribution Per Unit		Interest
	Target Amount		in Distributions
			Unitholders			General
						Partner
	above $0.3875 up to $0.4456			100	%		0	%
	above $0.4456 up to $0.4844			85	%		15	%
	above $0.4844 up to $0.5813			75	%		25	%
	above $0.5813			50	%		50	%
	The Partnership refers to additional increasing distributions to the General Partner as “incentive distributions.”
	The principal difference between the Partnership’s common units and subordinated units is that in any quarter during the subordination period, holders of the subordinated units are not entitled to receive any distributions from operating surplus until the common units have received the minimum quarterly distribution for such quarter plus any arrearages in the payment of the minimum quarterly distribution from prior quarters. Subordinated units will not accrue arrearages.
	The subordination period will end on the first business day after the Partnership has earned and paid at least (1) $1.55 (the minimum quarterly distribution on an annualized basis) on each outstanding common unit and subordinated unit for each of three consecutive, non-overlapping four quarter periods ending on or after September 30, 2016 or (2) $2.325 (150.0% of the annualized minimum quarterly distribution) on each outstanding common unit and subordinated unit and the related distribution on the incentive distribution rights for a four-quarter period ending immediately preceding such date, in each case provided there are no arrearages on the Partnership’s common units at that time.
	The subordination period will also end upon the removal of the General Partner other than for cause if no subordinated units or common units held by holder(s) of subordinated units or their affiliates are voted in favor of that removal. When the subordination period ends, all subordinated units will convert into common units on a one-for-one basis, and all common units thereafter will no longer be entitled to arrearages.

Equity_Plans

Equity Plans	3 Months Ended
	Mar. 31, 2015
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Disclosure of Compensation Related Costs, Share-based Payments
	Note 9—Equity Plans
	2013 Long-Term Incentive Plan
	The Board approved and adopted the Arc Logistics Long-Term Incentive Plan (the “2013 Plan”) in November 2013.  In July 2014, the Board formed a Compensation Committee (the “Compensation Committee”) to administer the 2013 Plan.  Effective as of March 2015, the Board dissolved the Compensation Committee and, on and after such date, the Board serves as the administrative committee (the “Committee”) under the 2013 Plan.  Employees (including officers), consultants and directors of the General Partner, the Partnership and its affiliates (the “Partnership Entities”) are eligible to receive awards under the 2013 Plan.  The 2013 Plan authorizes up to an aggregate of 2.0 million common units to be available for awards under the 2013 Plan, subject to adjustment as provided in the 2013 Plan.  Awards available for grant under the 2013 Plan include, but are not limited to, restricted units, phantom units, unit options, and unit appreciation rights, but only phantom units have been granted under the 2013 Plan to date. Distribution equivalent rights (“DER”) are also available for grant under the 2013 Plan, either alone or in tandem with other specific awards, which entitle the recipient to receive an amount equal to distributions paid on an outstanding common unit.  Upon the occurrence of a “change of control” or an award recipient’s termination of service due to death or “disability” (each quoted term, as defined in the 2013 Plan), any outstanding unvested award will vest in full.
	In July 2014, the Compensation Committee authorized the grant of an aggregate of 939,500 phantom units pursuant to the 2013 Plan to certain employees, consultants and non-employee directors of the Partnership Entities. Awards of phantom units are settled in common units, except that an award of less than 1,000 phantom units is settled in cash. If a phantom unit award recipient experiences a termination of service with the Partnership Entities other than (i) as a result of death or “disability” or (ii) due to certain circumstances in connection with a “change of control,” the Committee, at its sole discretion, may decide to vest all or any portion of the recipient’s unvested phantom units as of the date of such termination or may allow the unvested phantom units to remain outstanding and vest pursuant to the vesting schedule set forth in the applicable award agreement.
	Of the July 2014 awards, a total of 100,000 phantom units were granted to certain non-employee directors of the Board and are classified as equity awards (the “Director Grants”).  Each Director Grant will be settled in common units and includes a DER. The Director Grants have an aggregate grant date fair value of $2.5 million and vest in equal annual installments over a three-year period starting from the date of grant. For the three months ended March 31, 2015, the Partnership recorded approximately $0.2 million of unit-based compensation expense with respect to the Director Grants. As of March 31, 2015, the unrecognized unit-based compensation expense for the Director Grants is approximately $2.0 million, which will be recognized ratably over the remaining term of the awards.
	Of the July 2014 awards, a total of 832,000 phantom units were granted to employees and certain consultants of the Partnership Entities and are classified as equity awards (the “Employee Equity Grants”).  Each Employee Equity Grant will be settled in common units and includes a DER.  The Employee Equity Grants have an aggregate grant date fair value of $21.2 million and vest as follows: (i) 25% of the Employee Equity Grants will vest the day after the end of the Subordination Period (as defined in the Partnership’s limited partnership agreement); and (ii) the three remaining 25% installments of the Employee Equity Grants will vest based on the date on which the Partnership has paid, for three consecutive quarters, distributions to its common and subordinated unitholders at or above a stated level, with (A) 25% of the award vesting after distributions are paid at or above $0.4457 per unit for the required period, (B) 25% of the award vesting after distributions are paid at or above $0.4845 per unit for the required period, and (C) the last 25% of the award vesting after distributions are paid at or above $0.5814 per unit for the required period.  To the extent not previously vested, the Employee Equity Grants expire on the fifth anniversary of the date of grant, provided that the expiration date can be extended to the eighth anniversary of the date of grant or longer upon the satisfaction of certain conditions specified in the award agreement.  For the three months ended March 31, 2015, the Partnership recorded approximately $1.3 million of unit-based compensation expense with respect to the Employee Equity Grants. As of March 31, 2015, the unrecognized unit-based compensation expense for the Employee Equity Grants was approximately $17.3 million, which may be recognized variably over the remaining term of the awards based on the probability of the achievement of the performance vesting requirements.
	Of the July 2014 awards, a total of 7,500 phantom units were granted to certain employees of the Partnership Entities and are classified as liability awards for accounting purposes (the “Employee Liability Grants”).  Each Employee Liability Grant will be settled in cash (as such award consists of less than 1,000 phantom units) and includes a DER. The Employee Liability Grants have an aggregate grant date fair value of $0.2 million and have the same term and vesting requirements as the Employee Equity Grants described in the preceding paragraph.  For the three months ended March 31, 2015, the Partnership recorded less than $0.1 million of unit-based compensation expense with respect to the Employee Liability Grants.  As of March 31, 2015, the unrecognized unit based compensation expense for the Employee Liability Grants was approximately $0.1 million, which may be recognized variably over the remaining term of the awards based on the probability of the achievement of the performance vesting requirements and is subject to remeasurement each reporting period until the awards settle.
	In March 2015, the Board authorized the grant of an aggregate of 45,668 phantom units pursuant to the 2013 Plan to certain employees, consultants and non-employee directors of the Partnership Entities (“2015 Equity Grants”).  Each 2015 Equity Grant will be settled in common units and includes a DER.  The 2015 Equity Grants are classified as equity awards for accounting purposes and have an aggregate grant date fair value of $0.9 million and vest in equal annual installments over a three-year period starting from the date of grant.  For the three months ended March 31, 2015, the Partnership recorded less than $0.1 million of unit-based compensation expense with respect to the 2015 Equity Grants.  As of March 31, 2015, the unrecognized unit-based compensation expense for the 2015 Equity Grants is approximately $0.9 million, which will be recognized ratably over the remaining term of the awards.
	Subject to applicable earning criteria, the DER included in each phantom unit award described above entitles the award recipient to a cash payment (or, if applicable, payment of other property) equal to the cash distribution (or, if applicable, distribution of other property) paid on an outstanding common unit to unitholders generally based on the number of common units related to the portion of the award recipient’s phantom units that have not vested and been settled as of the record date for such distribution.  Cash distributions paid during the vesting period on phantom units that are classified as equity awards for accounting purposes are reflected initially as a reduction of partners’ capital.  Cash distributions paid on such equity awards that are not initially expected to vest or ultimately do not vest are classified as compensation expense.  As the probability of vesting changes, these initial categorizations could change.  Cash distributions paid during the vesting period on phantom units that are classified as liability awards for accounting purposes are reflected as compensation expense and included in the “Selling, general and administrative” line item in the accompanying unaudited condensed consolidated statements of operations and comprehensive income. During the three months ended March 31, 2015, the Partnership paid approximately $0.4 million in DERs to phantom unit holders, $0.2 million of which was reflected as a reduction of partners’ capital and the other $0.2 million was reflected as compensation expense and included in the “Selling, general and administrative” line item in the accompanying unaudited condensed consolidated statements of operations and comprehensive income.
	The compensation expense related to the 2013 Plan for the three months ended March 31, 2015 was $1.5 million, which was included in the “Selling, general and administrative” line item in the accompanying unaudited condensed consolidated statements of operations and comprehensive income. The amount recorded as liabilities in “Other non-current liabilities” in the accompanying unaudited condensed consolidated balance sheet as of March 31, 2015 was less than $0.1 million.
	The following table presents phantom units granted pursuant to the 2013 Plan:
		Equity Awards					Liability Awards
		Three Months Ended					Three Months Ended
		31-Mar-15					31-Mar-15
		Number			Weighted Avg.		Number		Weighted Avg.
		of Phantom			Grant Date		of Phantom		Grant Date		Fair Value at
		Units			Fair Value		Units		Fair Value		3/31/15
	Balance at December 31, 2014		928,500		$	25.46		7,500	$	25.46	$	19.28
	Granted		45,668		$	19.13		-	$	-	$	-
	Vested		-		$	-		-	$	-	$	-
	Forfeited		(6,000	)	$	25.46		-	$	-	$	-
	Balance at March 31, 2015		968,168		$	25.16		7,500	$	25.46	$	19.28

Earnings_Per_Unit

Earnings Per Unit	3 Months Ended
	Mar. 31, 2015
Earnings Per Share [Abstract]
Earnings Per Unit	Note 10—Earnings Per Unit
	The Partnership uses the two-class method when calculating the net income per unit applicable to limited partners. The two-class method is based on the weighted-average number of common and subordinated units outstanding during the period. Basic net income per unit applicable to limited partners (including subordinated unitholders) is computed by dividing limited partners’ interest in net income, after deducting distributions, if any, by the weighted-average number of outstanding common and subordinated units. Payments made to the Partnership’s unitholders are determined in relation to actual distributions paid and are not based on the net income allocations used in the calculation of net income per unit.
	Diluted net income per unit applicable to limited partners includes the effects of potentially dilutive units on the Partnership’s units. For the three months ended March 31, 2015, the only potentially dilutive units outstanding consisted of the phantom units (see “Note 9—Equity Plans”). For the three months ended March 31, 2015, none of the phantom units are considered outstanding and therefore there were no potentially dilutive units outstanding.
	The following table sets forth the calculation of basic and diluted earnings per limited partner unit for the periods indicated (in thousands, except per unit data):
		Three Months Ended
		March 31,
		2015		2014
	Net Income	$	304	$	1,861
	Less:
	Distribution equivalent rights for unissued units		230		-
	Net income available to limited partners	$	74	$	1,861
	Numerator for basic and diluted earnings per limited partner unit:
	Allocation of net income among limited partner interests:
	Net income allocated to common unitholders	$	39	$	987
	Net income allocated to subordinated unitholders	$	35	$	874
	Net income allocated to limited partners:	$	74	$	1,861
	Denominator for basic and diluted earnings per limited partner unit:
	Common units - (basic and diluted)		6,868		6,868
	Subordinated units - (basic and diluted)		6,081		6,081
	Earnings per limited partner unit:
	Common - (basic and diluted)	$	0.01	$	0.14
	Subordinated - (basic and diluted)	$	0.01	$	0.14

Related_Party_Transactions

Related Party Transactions	3 Months Ended
	Mar. 31, 2015
Related Party Transactions [Abstract]
Related Party Transactions
	Note 11—Related Party Transactions
	Agreements with Affiliates
	Payments to the General Partner and its Affiliates
	The General Partner conducts, directs and manages all activities of the Partnership. The General Partner is reimbursed on a monthly basis, or such other basis as may be determined, for: (i) all direct and indirect expenses it incurs or payments it makes on behalf of the Partnership and its subsidiaries; and (ii) all other expenses allocable to the Partnership and its subsidiaries or otherwise incurred by the General Partner in connection with operating the Partnership and its subsidiaries’ businesses (including expenses allocated to the General Partner by its affiliates).
	For the three months ended March 31, 2015  and 2014, the General Partner incurred expenses of $1.1 million and $0.9 million, respectively. Such expenses are reimbursable from the Partnership and are reflected in the “Selling, general and administrative – affiliate” line on the accompanying unaudited condensed consolidated statements of operations and comprehensive income. As of March 31, 2015 and December 31, 2014, the Partnership had a payable of approximately $2.7 million and $0.4 million, respectively, to the General Partner which is reflected as “Due to general partner” in the accompanying unaudited condensed consolidated balance sheets.
	Registration Rights Agreement
	In connection with the IPO, the Partnership entered into a registration rights agreement with the Sponsor.  Pursuant to the registration rights agreement, the Partnership is required to file, upon request of the Sponsor, a registration statement to register the common units issued to the Sponsor and the common units issuable upon the conversion of the subordinated units held by the Sponsor.  In addition, the registration rights agreement gives the Sponsor piggyback registration rights under certain circumstances.  The registration rights agreement also includes provisions dealing with holdback agreements, indemnification and contribution and allocation of expenses.  These registration rights are transferable to affiliates and, in certain circumstances, to third parties.
	Other Transactions with Related Persons
	GCAC Guarantee
	GCAC guarantees up to $20 million of the Partnership’s Credit Facility. Under certain circumstances, the lenders may release GCAC from such guarantee.
	Storage and Throughput Agreements with Center Oil
	During 2007, the Partnership acquired seven terminals from Center Oil for $35.0 million in cash and 750,000 subordinated units in the Partnership. In connection with this purchase, the Partnership entered into a storage and throughput agreement with Center Oil whereby the Partnership provides storage and throughput services for various petroleum products to Center Oil at the terminals acquired by the Partnership in return for a fixed per barrel fee for each outbound barrel of Center Oil product shipped or committed to be shipped. The throughput fee is calculated and due monthly based on the terms and conditions as set forth in the storage and throughput agreement. In addition to the monthly throughput fee, Center Oil is required to pay the Partnership a fixed per barrel fee for any additives added into Center Oil’s product.
	The term of the storage and throughput agreement extends through June 2017.  The agreement will automatically renew for a period of three years at the expiration of the current term at an inflation adjusted rate (subject to a cap), as determined in accordance with the agreement, unless a party delivers a written notice of its election to terminate the storage and throughput agreement at least eighteen months prior to the expiration of the current term.
	In February 2010, the Partnership acquired a 50% undivided interest in the Baltimore, MD terminal. In connection with the acquisition, the Partnership acquired an existing agreement with Center Oil whereby the Partnership provides ethanol storage and throughput services to Center Oil. The Partnership charges Center Oil a fixed fee for storage and a fee based upon ethanol throughput at the Baltimore, MD terminal. The storage and throughput fees are calculated monthly based on the terms and conditions of the storage and throughput agreement.  This agreement was renewed under the one-year evergreen provision and has been extended to May 2016.
	In May 2011, the Partnership entered into an agreement to provide refined products storage and throughput services to Center Oil at the Baltimore, MD terminal. The Partnership charges Center Oil a fixed fee for storage and a fee for ethanol blending and any additives added to Center Oil’s product. The storage and throughput fees are calculated monthly based on the terms and conditions of the storage and throughput agreement.  This agreement was not renewed and will expire in May 2015.
	In May 2013, the Partnership entered into an agreement to provide gasoline storage and throughput services to Center Oil at the Brooklyn, NY terminal. The Partnership charges Center Oil a fixed per barrel fee for each inbound delivery of ethanol and every outbound barrel of product shipped or committed to be shipped and a fee for any ethanol blending and additives added to Center Oil’s product. The storage and throughput fees are calculated monthly based on the terms and conditions of the storage and throughput agreement. The agreement has a one-year term and comes up for renewal in May 2015.   This agreement was renewed under the one-year evergreen provision and has been extended to May 2016.
	Storage and Throughput Agreements with GCAC
	In February 2013, the Partnership entered into a storage and throughput agreement with GCAC (the “GCAC Agreement 1”) whereby the Partnership provides storage and throughput services for various petroleum products to GCAC in return for a fixed per barrel storage fee plus a fixed per barrel fee for related throughput and other ancillary services. In addition, the Partnership entered into a second storage and throughput agreement with GCAC (the “GCAC Agreement 2”) whereby the Partnership built an additional 150,000 barrels of storage tanks for GCAC to store and throughput various petroleum products in return for similar economic terms of GCAC Agreement 1.
	The initial term of GCAC Agreements 1 and 2 is approximately five years. These agreements can be mutually extended by both parties as long as the extension is agreed to 180 days prior to the end of the initial termination date; otherwise the Partnership has the right to lease the storage capacity to any third party.
	The total revenues associated with the storage and throughput agreements for Center Oil and GCAC and reflected in the “Revenues – Related parties” line on the accompanying unaudited condensed consolidated statements of operations and comprehensive income are as follows (in thousands):
		Three Months Ended
		March 31,
		2015		2014
	Center Oil	$	1,728	$	1,885
	GCAC		450		453
	Total	$	2,178	$	2,338
	The total receivables associated with the storage and throughput agreements for Center Oil and GCAC and reflected in the “Due from related parties” line on the accompanying unaudited condensed consolidated balance sheets are as follows (in thousands):
		As of
		March 31,		December 31,
		2015		2014
	Center Oil	$	636	$	594
	GCAC		310		306
	Total	$	946	$	900
	Operating Lease Agreement
	In January 2014, the Partnership, through its wholly owned subsidiary, Arc Terminals Holdings, entered into a triple net operating lease agreement relating to the Portland Terminal together with a supplemental co-terminus triple net operating lease agreement for the use of certain pipeline infrastructure at such terminal (such lease agreements, collectively, the “Lease Agreement”), pursuant to which Arc Terminals Holdings leased the Portland Terminal from a wholly owned subsidiary of CorEnergy Infrastructure Trust, Inc. (“CorEnergy”).  Arc Logistics guaranteed Arc Terminals Holdings’ obligations under the Lease Agreement. CorEnergy owns a 6.6% direct investment in Lightfoot Capital Partners LP and a 1.5% direct investment in Lightfoot Capital Partners GP LLC, the general partner of Lightfoot.  The Lease Agreement has a 15-year initial term and may be extended for additional five-year terms at the sole discretion of Arc Terminals Holdings, subject to renegotiated rental payment terms.
	During the term of the Lease Agreement, Arc Terminals Holdings will make base monthly rental payments and variable rent payments based on the volume of liquid hydrocarbons that flowed through the Portland Terminal in the prior month.  The base rent in the initial years of the Lease Agreement were $230,000 per month through July 2014 (prorated for the partial month of January 2014) and are $417,522 for each month thereafter until the end of year five.  The base rent also increased each month starting with the month of August 2014 by a factor of 0.00958 of the specified construction costs incurred by LCP Oregon Holdings LLC (“LCP Oregon”) at the Portland Terminal, estimated at $10 million.  Assuming such improvements are completed, the base rent will increase by approximately $95,800 per month.  As of March 31, 2015, spending on terminal-related projects by CorEnergy since the commencement of the Lease Agreement totaled approximately $7.5 million and, as a result, the base rent has increased by approximately $72,000 per month.    The base rent will be increased at the end of year five by the change in the consumer price index for the prior five years, and every year thereafter by the greater of two percent or the change in the consumer price index. The base rent is not influenced by the flow of hydrocarbons. Variable rent will result from the flow of hydrocarbons through the Portland Terminal in excess of a designated threshold of 12,500 barrels per day of oil equivalent.  Variable rent is capped at 30% of base rent payments regardless of the level of hydrocarbon throughput.  During the three months ended March 31, 2015 and 2014, the expense associated with the Lease Agreement was $1.6 million and $1.6 million, respectively.  During the three months ended March 31, 2015 and 2014, there was no variable rent associated with the Lease Agreement.
	So long as Arc Terminals Holdings is not in default under the Lease Agreement, it shall have the right to purchase the Portland Terminal at the end of the third year of the Lease Agreement and at the end of any month thereafter by delivery of 90 days’ notice (“Purchase Option”). The purchase price shall be the greater of (i) nine times the total of base rent and variable rent for the 12 months immediately preceding the notice and (ii) $65.7 million. If the purchase right is not exercised, the Lease Agreement shall remain in place and Arc Terminals Holdings shall continue to pay rent as provided above. Arc Terminals Holdings also has the option to terminate the Lease Agreement on the fifth and tenth anniversaries, by providing written notice 12 months in advance, for a termination fee of approximately $4 million and $6 million, respectively.
	Pending JBBR Acquisition
	JBBR Purchase Agreement
	In February 2015, Arc AcquisitionCo, the Partnership’s indirect, wholly owned subsidiary that upon the closing of the JBBR Acquisition will be owned jointly by the Partnership and an affiliate of GE EFS, entered into the JBBR Purchase Agreement pursuant to which Arc AcquisitionCo agreed, subject to the terms and conditions thereof, to acquire from CenterPoint, for a base cash purchase price of $216 million (the “JBBR Purchase Price”), all of the membership interests in JBBR, which among other things owns the Joliet Terminal. Arc AcquisitionCo is also required to pay to CenterPoint earn-out payments for each barrel of petroleum product that is either delivered to or received from the Joliet Terminal (without duplication) or for which JBBR receives payment under minimum volume commitments regardless of actual throughput activity.  Arc AcquisitionCo’s earn-out obligations to CenterPoint will terminate upon the payment, in the aggregate, of $27 million.  In connection with the JBBR Acquisition, the Partnership entered into a joint venture arrangement with GE EFS. Upon the closing of the JBBR Acquisition, an affiliate of GE EFS will own 40% of Arc AcquisitionCo, with the remaining 60% owned by the Partnership. The Partnership will manage the ongoing operations of Arc AcquisitionCo and its subsidiaries, including JBBR.
	Arc AcquisitionCo is also required to pay to CenterPoint earn-out payments for each barrel of petroleum product that is either delivered to or received from the Joliet Terminal (without duplication) or for which JBBR receives payment under minimum volume commitments regardless of actual throughput activity.  Arc AcquisitionCo’s earn-out obligations to CenterPoint will terminate upon the payment, in the aggregate, of $27 million.
	Equity Commitment Letter and Interim Investors Agreement
	In February 2015, Aircraft Services Corporation (the “GE Equity Provider”), an affiliate of GE EFS, entered into an equity commitment letter with Arc AcquisitionCo under which GE Equity Provider agreed to contribute to Arc AcquisitionCo forty percent (40%) of the JBBR Purchase Price to enable Arc AcquisitionCo to consummate the JBBR Acquisition. GE Equity Provider’s obligations to make such funding available to Arc AcquisitionCo at the JBBR Closing are subject to customary funding conditions, including the satisfaction (or waiver by Arc AcquisitionCo) of all conditions to Arc AcquisitionCo’s obligation to consummate the JBBR Acquisition pursuant to the JBBR Purchase Agreement, as more fully set forth in the equity commitment letter provided by GE Equity Provider.
	In February 2015, the Partnership and EFS-S LLC (an affiliate of GE EFS and, as such, “GE JV Partner”) entered into an interim investors agreement (the “Interim Investors Agreement”), which governs the actions of Arc AcquisitionCo and the relationship between the Partnership and GE JV Partner as it relates to Arc AcquisitionCo until the earlier of the JBBR Closing and the termination of the JBBR Purchase Agreement. The Partnership and GE JV Partner have agreed to enter into an amended and restated limited liability company agreement of Arc AcquisitionCo concurrently with the JBBR Closing on terms consistent with terms set forth in the Interim Investors Agreement.
	GE EFS owns, indirectly, interests in Lightfoot. Lightfoot has a significant interest in the Partnership through its ownership of a 40.3% limited partner interest in the Partnership (prior to giving effect to the issuance by the Partnership of common units in the PIPE Transaction described below), 100% of the limited liability company interests in the General Partner, and all of the Partnership’s incentive distribution rights. Daniel Castagnola, Managing Director of GE EFS, which is an affiliate of General Electric Capital Corporation, serves on the Board.
	Financing of the Partnership Equity Commitment
	PIPE Transaction
	In February 2015, the Partnership entered into a Unit Purchase Agreement (the “PIPE Purchase Agreement”) with the purchasers named therein (the “PIPE Purchasers”) to sell 4,411,765 common units at a price of $17.00 per unit in a private placement. The common unit purchase price payable by the PIPE Purchasers will be reduced by the Partnership’s first quarter 2015 distribution in respect of its common units if the closing of the PIPE Transaction occurs after the record date for such distribution. Assuming the closing occurs after the record date of the Partnership’s first quarter 2015 distribution, the Partnership will sell 4,520,795 common units at a price of $16.59 to the PIPE Purchasers.  The Partnership will use the proceeds from the private placement (totaling $75 million before placement agent commissions and expenses) to fund a portion of the Partnership’s obligations under an equity commitment letter delivered by the Partnership to Arc AcquisitionCo with respect to the Partnership’s 60% (approximately $130 million) of the JBBR Purchase Price. If the PIPE Purchase Agreement is terminated pursuant to its terms, including on account of the termination of the JBBR Purchase Agreement or if the closing under the PIPE Purchase Agreement fails to occur by May 18, 2015, the Partnership is required to pay to each PIPE Purchaser a commitment fee of 1% of such PIPE Purchaser’s commitment amount. During the period commencing on the date of execution of the PIPE Purchase Agreement and ending 90 days following the date of the closing of the PIPE Transaction, the Partnership is restricted from issuing, without the consent of the PIPE Purchasers holding a majority of the purchased common units (or, prior to closing, the PIPE Purchasers entitled to acquire at closing a majority of such common units), equity securities of the Partnership except for, in general, common units of the Partnership issued at or above a stated issuance price in (or to fund) an acquisition that is determined by the Board to result in an increase in the Partnership’s distributable cash flow over the first full four quarters following such acquisition. The issuance of the common units pursuant to the PIPE Purchase Agreement is being made in reliance upon an exemption from the registration requirements of the Securities Act of 1933 pursuant to Section 4(a)(2) thereof.
	MTP Energy Master Fund Ltd. (“Magnetar PIPE Investor”), one of the PIPE Purchasers, has committed $9.5 million to the purchase of common units in the PIPE Transaction. Magnetar Financial LLC controls the investment manager of the Magnetar PIPE Investor, and an affiliate of Magnetar Financial LLC also owns interests in the Sponsor, which is the sole owner of the General Partner. Eric Scheyer, the Head of the Energy Group of Magnetar Financial LLC, also serves on the Board.

Major_Customers

Major Customers	3 Months Ended
	Mar. 31, 2015
Risks And Uncertainties [Abstract]
Major Customers
	Note 12—Major Customers
	The following table presents the percentage of revenues and receivables associated with the Partnership’s significant customers (those that have accounted for 10% or more of the Partnership’s revenues in a given period) for the periods indicated:
		% of Revenues
		Three Months Ended						% of Receivables
		March 31,						March 31,			December 31,
		2015			2014			2015			2014
	Customer A		25	%		10	%		23	%		26	%
	Customer B		13	%		14	%		12	%		13	%
	Total		38	%		24	%		35	%		39	%

Commitments_and_Contingencies

Commitments and Contingencies	3 Months Ended
	Mar. 31, 2015
Commitments And Contingencies Disclosure [Abstract]
Commitments and Contingencies	Note 13—Commitments and Contingencies
	Environmental matters
	The Partnership may have environmental liabilities that arise from time to time in the ordinary course of business and provides for losses associated with environmental remediation obligations, when such losses are probable and reasonably estimable. Estimated losses from environmental remediation obligations generally are recognized no later than completion of the remedial feasibility study. Loss accruals are adjusted as further information becomes available or circumstances change. Costs of future expenditures for environmental remediation obligations are not discounted to their present value. There were no accruals recorded for environmental losses as of March 31, 2015 and December 31, 2014.
	Commitments and contractual obligations
	Future non-cancelable commitments related to certain contractual obligations as of March 31, 2015 are presented below (in thousands):
		Payments Due by Period
		Total		2015		2016		2017		2018		2019		Thereafter
	Long-term debt obligations	$	111,063	$	-	$	-	$	-	$	-	$	111,063	$	-
	Operating lease obligations		28,394		4,787		6,416		6,284		6,288		4,619		-
	Total	$	139,457	$	4,787	$	6,416	$	6,284	$	6,288	$	115,682	$	-
	The schedule above assumes the Partnership will either exercise its Purchase Option or its right to terminate the Lease Agreement.
	During 2014, the members of Gulf LNG Holdings approved spending up to approximately $14.6 million towards the development of a potential natural gas liquefaction and export terminal at the LNG Facility.  Through March 31, 2015, capital calls totaling $14.6 million were issued to all members of Gulf LNG Holdings, for which the Partnership’s pro-rata share was approximately $1.5 million.  As of March 31, 2015, there are no additional remaining capital commitments.
	In addition to the above, GCAC is able to receive up to an additional $5.0 million in cash earnout payments based upon the throughput activity of one customer through December 31, 2016. As of March 31, 2015, no additional amounts had been paid or are owed to GCAC.

Subsequent_Events

Subsequent Events	3 Months Ended
	Mar. 31, 2015
Subsequent Events [Abstract]
Subsequent Events	Note 14—Subsequent Events
	Amendment to Credit Facility
	In April 2015, Arc Terminals Holdings, together with the Partnership and certain of its other subsidiaries, as guarantors, entered into the second amendment to the Credit Facility (the “Second Amendment”) in contemplation, of the pending JBBR Acquisition.  The Second Amendment principally modifies certain provisions of the Credit Facility (i) to provide availability to finance a portion of the Partnership’s purchase price obligations for the JBBR Acquisition and (ii) to increase the aggregate commitments under the Credit Facility from $175 million to $275 million, subject to the satisfaction of certain conditions and the consummation of the JBBR Acquisition.
	Long-Term Incentive Plan
	In April 2015, the Partnership granted 32,500 additional phantom units pursuant to the 2013 Plan to certain employees of the Partnership Entities.  Each grant has performance based vesting on terms similar to the Employee Equity Grants issued in July 2014, will be settled in common units and includes a DER.
	Cash Distribution
	In May 2015, the Partnership declared a quarterly cash distribution of $0.41 per unit ($1.64 per unit on an annualized basis) totaling approximately $5.3 million for all common and subordinated units outstanding. The distribution is for the period from January 1, 2015 through March 31, 2015. The distribution is payable on May 15, 2015 to unitholders of record on May 11, 2015.

Summary_of_Significant_Account1

Summary of Significant Accounting Policies (Policies)	3 Months Ended
	Mar. 31, 2015
Accounting Policies [Abstract]
Basis of Presentation
	Basis of Presentation
	The accompanying interim statements of the Partnership have been prepared in accordance with GAAP for interim financial information and with the instructions to Form 10-Q and Article 10 of Regulation S-X issued by the SEC. Accordingly, they do not include all of the information and footnotes required by GAAP for complete financial statements. In the opinion of management, all adjustments, consisting only of normal recurring adjustments and disclosures necessary for a fair presentation of these interim statements have been included. The results reported in these interim statements are not necessarily indicative of the results that may be reported for the entire year or for any other period. These interim statements should be read in conjunction with the Partnership’s consolidated financial statements for the year ended December 31, 2014, which are included in the Partnership’s Annual Report on Form 10-K, as filed with the SEC. The year-end balance sheet data was derived from the audited financial statements, but does not include all disclosures required by GAAP.
Use of Estimates	Use of Estimates
	The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements. The most significant estimates relate to the valuation of acquired businesses, goodwill and intangible assets, assessment for impairment of long-lived assets and the useful lives of intangible assets and property, plant and equipment. Actual results could differ from those estimates.
Impairment of Long-Lived Assets	Impairment of Long-Lived Assets
	Long-lived assets are reviewed for impairment whenever events or changes in circumstances indicate that the carrying amount of an asset may not be recoverable. Recoverability of assets to be held and used is measured by a comparison of the carrying amount of an asset to the estimated undiscounted future cash flows expected to be generated by the asset. If the carrying amount of an asset exceeds its estimated future cash flows, an impairment charge is recognized for the amount by which the carrying amount of the asset exceeds the estimated fair value of the asset. Assets to be disposed of are separately presented in the balance sheet and reported at the lower of the carrying amount or fair value less costs to sell and are no longer depreciated.
	No impairment charges were recorded during the three months ended March 31, 2015. Refer to “Note 5—Property, Plant and Equipment” for discussion on impairments recorded during the year ended December 31, 2014.
Goodwill	Goodwill
	Goodwill represents the excess of consideration paid over the fair value of net assets acquired in a business combination. Goodwill is not amortized but instead is assessed for impairment at least annually or when facts and circumstances warrant. The Partnership determined at December 31, 2014 that there were no impairment charges and subsequent to that date no event indicating an impairment has occurred.
	A summary of the changes in the carrying amount of goodwill is as follows (in thousands):
		As of
		March 31,		December 31,
		2015		2014
	Beginning Balance	$	15,162	$	15,162
	Goodwill acquired		-		-
	Impairment		-		-
	Ending Balance	$	15,162	$	15,162
Deferred Rent	Deferred Rent
	The Lease Agreement (as defined in “Note 11—Related Party Transactions—Other Transactions with Related Persons—Operating Lease Agreement” below) contains certain rent escalation clauses, contingent rent provisions and lease termination payments. The Partnership recognizes rent expense for operating leases on a straight-line basis over the term of the lease, taking into consideration the items noted above. Contingent rental payments are generally recognized as rent expense as incurred. The deferred rent resulting from the recognition of rent expense on a straight-line basis related to the Lease Agreement is included within “Other non-current liabilities” in the accompanying unaudited condensed consolidated balance sheet at March 31, 2015 and December 31, 2014.
Revenue Recognition	Revenue Recognition
	Revenues from leased tank storage and delivery services are recognized as the services are performed, evidence of a contractual arrangement exists and collectability is reasonably assured. Revenues also include the sale of excess products and additives which are mixed with customer-owned liquid products. Revenues for the sale of excess products and additives are recognized when title and risk of loss passes to the customer.
Fair Value of Financial Instruments	Fair Value of Financial Instruments
	Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at a specified measurement date. Fair value measurements are derived using inputs and assumptions that market participants would use in pricing an asset or liability, including assumptions about risk. GAAP establishes a valuation hierarchy for disclosure of the inputs to valuation used to measure fair value. This three-tier hierarchy classifies fair value amounts recognized or disclosed in the condensed consolidated financial statements based on the observability of inputs used to estimate such fair values. The classification within the hierarchy of a financial asset or liability is determined based on the lowest level input that is significant to the fair value measurement. The hierarchy considers fair value amounts based on observable inputs (Level 1 and 2) to be more reliable and predictable than those based primarily on unobservable inputs (Level 3). At each balance sheet reporting date, the Partnership categorizes its financial assets and liabilities using this hierarchy.
	The amounts reported in the balance sheet for cash equivalents, accounts receivable, accounts payable and accrued liabilities approximate their fair value because of the short-term maturities of these instruments (Level 1). Because the Credit Facility (as defined in “Note 7 – Debt – Credit Facility” below) has a market rate of interest, its carrying amount approximated fair value (Level 2).
	The Partnership believes that its valuation methods are appropriate and consistent with the values that would be determined by other market participants. However, the use of different methodologies or assumptions to determine fair value of certain financial instruments could result in a different estimate of fair value at the reporting date.
Unit-Based Compensation
	Unit-Based Compensation
	The Partnership recognizes all unit-based compensation to directors, officers, employees and other service providers in the consolidated financial statements based on the fair value of the awards.  Fair value for unit-based awards classified as equity awards is determined on the grant date of the award, and this value is recognized as compensation expense ratably over the requisite service or performance period of the equity award. Fair value for equity awards is calculated at the closing price of the common units on the grant date. Fair value for unit-based awards classified as liability awards is calculated at the closing price of the common units on the grant date and is remeasured at each reporting period until the award is settled. Compensation expense related to unit-based awards is included in the “Selling, general and administrative” line item in the accompanying unaudited condensed consolidated statements of operations and comprehensive income.
	For awards with performance conditions, the expense is accrued over the service period only if the performance condition is considered to be probable of occurring. When awards with performance conditions that were previously considered improbable become probable, the Partnership incurs additional expense in the period that the probability assessment changes (see “Note 9—Equity Plans”).
Net Income Per Unit	Net Income Per Unit
	The Partnership uses the two-class method in the computation of earnings per unit since there is more than one participating class of securities. Earnings per common and subordinated unit are determined by dividing net income allocated to the common units and subordinated units, respectively, after deducting the amount allocated to the phantom unitholders, if any, by the weighted average number of outstanding common and subordinated units, respectively, during the period. The overall computation, presentation and disclosure of the Partnership’s limited partners’ net income per unit are made in accordance with the Financial Accounting Standards Board (“FASB”) Accounting Standards Codification (“ASC”) Topic 260 “Earnings per Share.”
Segment Reporting	Segment Reporting
	The Partnership derives revenue from operating its terminal and transloading facilities.  These facilities have been aggregated into one reportable segment because the facilities have similar long-term economic characteristics, products and types of customers.
Recently Issued Accounting Pronouncements	Recently Issued Accounting Pronouncements
	In May 2014, the FASB issued updated guidance on the reporting and disclosure of revenue recognition. The update requires that an entity recognize revenue to depict the transfer of goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. This update also requires new qualitative and quantitative disclosures about the nature, amount, timing and uncertainty of revenue and cash flows arising from customer contracts, including significant judgments and changes in judgments, information about contract balances and performance obligations, and assets recognized from costs incurred to obtain or fulfill a contract. The Partnership is currently evaluating the potential impact of this authoritative guidance on its financial condition, results of operations, cash flows and related disclosures.  In April 2015, the FASB proposed a one year deferral of the effective date, and therefore, this guidance will be effective for the Partnership beginning in the first quarter of 2018, with early adoption optional but not before the original effective date of December 15, 2016.
	In June 2014, the FASB issued new guidance related to stock compensation.  The new standard requires that a performance target that affects vesting, and that could be achieved after the requisite service period, be treated as a performance condition.  As such, the performance target should not be reflected in estimating the grant date fair value of the award.  This update further clarifies that compensation cost should be recognized in the period in which it becomes probable that the performance target will be achieved and should represent the compensation cost attributable to the periods for which the requisite service has already been rendered.  The Partnership does not expect this requirement to have a significant impact on its financial condition, results of operations, cash flows and related disclosures.  This guidance will be effective for the Partnership beginning in the first quarter of 2016, with early adoption optional.
	In February 2015, the FASB issued new guidance related to evaluating entities for inclusion in consolidations for both the variable interest model and for the voting model for limited partnerships and similar entities.  The update requires that all reporting entities reevaluate whether they should consolidate certain legal entities.  The Partnership does not expect this requirement to have a significant impact on its financial condition, results of operations, cash flows and related disclosures.  This guidance will be effective for the Partnership in the first quarter of 2016, with early adoption optional.
	In April 2015, the FASB issued new guidance related to presentation of debt issuance costs.  The update requires debt issuance costs to be presented in the balance sheet as a direct deduction from the carrying value of the associated debt liability, consistent with the presentation of a debt discount.  The Partnership is currently assessing the impact that adopting this new accounting guidance will have on its consolidated financial statements and disclosures.  This guidance will be effective for the Partnership in the first quarter of 2016, with early adoption optional.

Summary_of_Significant_Account2

Summary of Significant Accounting Policies (Tables)	3 Months Ended
	Mar. 31, 2015
Accounting Policies [Abstract]
Schedule of Goodwill	A summary of the changes in the carrying amount of goodwill is as follows (in thousands):
		As of
		March 31,		December 31,
		2015		2014
	Beginning Balance	$	15,162	$	15,162
	Goodwill acquired		-		-
	Impairment		-		-
	Ending Balance	$	15,162	$	15,162

Investment_in_Unconsolidated_A1

Investment in Unconsolidated Affiliate (Tables)	3 Months Ended
	Mar. 31, 2015
Schedule of Investment in Unconsolidated Affiliate	“Investment in unconsolidated affiliate” consisted of the LNG Interest, and its balances as of March 31, 2015 and December 31, 2014 are represented below (in thousands):
	Balance at December 31, 2014	$	72,858
	Equity earnings		2,489
	Contributions		310
	Distributions		(1,775	)
	Amortization of premium		(78	)
	Other comprehensive income		(471	)
	Balance at March 31, 2015	$	73,333
Schedule of Estimated Aggregate Amortization of Premium	The estimated aggregate amortization of this premium for its remaining useful life from March 31, 2015 is as follows (in thousands):
		Total
	2015	$	231
	2016		309
	2017		309
	2018		309
	2019		309
	Thereafter		6,753
		$	8,220
Gulf LNG Holdings [Member]
Schedule of Investment in Unconsolidated Affiliate	Summarized financial information for the Gulf LNG Holdings is reported below (in thousands):
		March 31,			December 31,
		2015			2014
	Balance sheets
	Current assets	$	9,767		$	12,537
	Noncurrent assets		920,489			926,980
	Total assets	$	930,256		$	939,517
	Current liabilities	$	77,281		$	85,818
	Long-term liabilities		727,286			733,401
	Member’s equity		125,689			120,298
	Total liabilities and member’s equity	$	930,256		$	939,517
		Three Months Ended
		March 31,
		2015			2014
	Income statements
	Revenues	$	46,624		$	46,561
	Total operating costs and expenses		14,206			14,280
	Operating income		32,418			32,281
	Net income	$	24,165		$	23,656

Property_Plant_and_Equipment_T

Property, Plant and Equipment (Tables)	3 Months Ended
	Mar. 31, 2015
Property Plant And Equipment [Abstract]
Schedule of Property, Plant and Equipment	The Partnership’s property, plant and equipment consisted of (in thousands):
		As of
		March 31,			December 31,
		2015			2014
	Land	$	49,615		$	49,615
	Buildings and site improvements		36,356			36,298
	Tanks and trim		91,600			91,463
	Machinery and equipment		33,010			32,815
	Office furniture and equipment		2,353			2,348
	Construction in progress		7,323			6,175
			220,257			218,714
	Less:  Accumulated depreciation		(24,672	)		(22,828	)
	Property, plant and equipment, net	$	195,585		$	195,886

Intangible_Assets_Tables

Intangible Assets (Tables)	3 Months Ended
	Mar. 31, 2015
Goodwill And Intangible Assets Disclosure [Abstract]
Summary of Partnership's Intangible Assets
	The Partnership’s intangible assets consisted of (in thousands):
		Estimated	As of
		Useful Lives	March 31,			December 31,
		in Years	2015			2014
	Customer relationships	21	$	4,785		$	4,785
	Acquired contracts	10-Feb		39,900			39,900
	Noncompete agreements	3-Feb		741			741
				45,426			45,426
	Less:  Accumulated amortization			(13,405	)		(12,237	)
	Intangible assets, net		$	32,021		$	33,189

Partners_Capital_and_Distribut1

Partners' Capital and Distributions (Tables)	3 Months Ended
	Mar. 31, 2015
Equity [Abstract]
Schedule of the Quarterly Distributions Related to the Partnership's Quarterly Financial Results
	The table below summarizes the quarterly distributions related to the Partnership’s quarterly financial results (in thousands, except per unit data):
		Total Quarterly			Total Cash			Date of	Unitholders
	Quarter Ended	Distribution Per Unit			Distribution			Distribution	Record Date
	31-Mar-15	$	0.41		$	5,309		15-May-15	11-May-15
	31-Dec-14	$	0.41		$	5,309		17-Feb-15	9-Feb-15
	30-Sep-14	$	0.41		$	5,309		17-Nov-14	10-Nov-14
	30-Jun-14	$	0.4		$	5,180		18-Aug-14	11-Aug-14
	31-Mar-14	$	0.3875		$	5,018		16-May-14	9-May-14
Percentage of Incentive Distribution Rights to Partnership's Unitholders and General Partner	If cash distributions to the Partnership’s unitholders exceed $0.4456 per unit in any quarter, the Partnership’s unitholders and the General Partner, as the initial holder of the incentive distribution rights, will receive distributions according to the following percentage allocations:
	Total Quarterly	Marginal Percentage
	Distribution Per Unit	Interest
	Target Amount	in Distributions
		Unitholders			General
					Partner
	above $0.3875 up to $0.4456		100	%		0	%
	above $0.4456 up to $0.4844		85	%		15	%
	above $0.4844 up to $0.5813		75	%		25	%
	above $0.5813		50	%		50	%

Equity_Plans_Table

Equity Plans (Table)	3 Months Ended
	Mar. 31, 2015
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Schedule of Share-based Compensation, Stock Options, Activity
	The following table presents phantom units granted pursuant to the 2013 Plan:
		Equity Awards					Liability Awards
		Three Months Ended					Three Months Ended
		31-Mar-15					31-Mar-15
		Number			Weighted Avg.		Number		Weighted Avg.
		of Phantom			Grant Date		of Phantom		Grant Date		Fair Value at
		Units			Fair Value		Units		Fair Value		3/31/15
	Balance at December 31, 2014		928,500		$	25.46		7,500	$	25.46	$	19.28
	Granted		45,668		$	19.13		-	$	-	$	-
	Vested		-		$	-		-	$	-	$	-
	Forfeited		(6,000	)	$	25.46		-	$	-	$	-
	Balance at March 31, 2015		968,168		$	25.16		7,500	$	25.46	$	19.28

Earnings_Per_Unit_Tables

Earnings Per Unit (Tables)	3 Months Ended
	Mar. 31, 2015
Earnings Per Share [Abstract]
Schedule of Earnings Per Unit
	The following table sets forth the calculation of basic and diluted earnings per limited partner unit for the periods indicated (in thousands, except per unit data):
		Three Months Ended
		March 31,
		2015		2014
	Net Income	$	304	$	1,861
	Less:
	Distribution equivalent rights for unissued units		230		-
	Net income available to limited partners	$	74	$	1,861
	Numerator for basic and diluted earnings per limited partner unit:
	Allocation of net income among limited partner interests:
	Net income allocated to common unitholders	$	39	$	987
	Net income allocated to subordinated unitholders	$	35	$	874
	Net income allocated to limited partners:	$	74	$	1,861
	Denominator for basic and diluted earnings per limited partner unit:
	Common units - (basic and diluted)		6,868		6,868
	Subordinated units - (basic and diluted)		6,081		6,081
	Earnings per limited partner unit:
	Common - (basic and diluted)	$	0.01	$	0.14
	Subordinated - (basic and diluted)	$	0.01	$	0.14

Related_Party_Transactions_Tab

Related Party Transactions (Tables)	3 Months Ended
	Mar. 31, 2015
Revenues - Related Parties [Member]
Schedule of Related Party Transactions
	The total revenues associated with the storage and throughput agreements for Center Oil and GCAC and reflected in the “Revenues – Related parties” line on the accompanying unaudited condensed consolidated statements of operations and comprehensive income are as follows (in thousands):
		Three Months Ended
		March 31,
		2015		2014
	Center Oil	$	1,728	$	1,885
	GCAC		450		453
	Total	$	2,178	$	2,338
Receivables [Member]
Schedule of Related Party Transactions	The total receivables associated with the storage and throughput agreements for Center Oil and GCAC and reflected in the “Due from related parties” line on the accompanying unaudited condensed consolidated balance sheets are as follows (in thousands):
		As of
		March 31,		December 31,
		2015		2014
	Center Oil	$	636	$	594
	GCAC		310		306
	Total	$	946	$	900

Major_Customers_Tables

Major Customers (Tables)	3 Months Ended
	Mar. 31, 2015
Risks And Uncertainties [Abstract]
Schedules of Percentages of Revenues and Receivables Associated with Significant Customers	The following table presents the percentage of revenues and receivables associated with the Partnership’s significant customers (those that have accounted for 10% or more of the Partnership’s revenues in a given period) for the periods indicated:
		% of Revenues
		Three Months Ended						% of Receivables
		March 31,						March 31,			December 31,
		2015			2014			2015			2014
	Customer A		25	%		10	%		23	%		26	%
	Customer B		13	%		14	%		12	%		13	%
	Total		38	%		24	%		35	%		39	%

Commitments_and_Contingencies_

Commitments and Contingencies (Tables)	3 Months Ended
	Mar. 31, 2015
Commitments And Contingencies Disclosure [Abstract]
Schedule of Future Non-Cancelable Commitments Related to Certain Contractual Obligations
	Future non-cancelable commitments related to certain contractual obligations as of March 31, 2015 are presented below (in thousands):
		Payments Due by Period
		Total		2015		2016		2017		2018		2019		Thereafter
	Long-term debt obligations	$	111,063	$	-	$	-	$	-	$	-	$	111,063	$	-
	Operating lease obligations		28,394		4,787		6,416		6,284		6,288		4,619		-
	Total	$	139,457	$	4,787	$	6,416	$	6,284	$	6,288	$	115,682	$	-

Organization_and_Presentation_

Organization and Presentation - Additional Information (Detail) (USD $)	1 Months Ended
	Nov. 30, 2013	Mar. 31, 2015
Sponsor [Member]
Organization [Line Items]
Limited partners capital units percentage		40.30%
Sponsor [Member] | Common Units [Member]
Organization [Line Items]
Limited partners capital units owned		68,617
Sponsor [Member] | Subordinated Units [Member]
Organization [Line Items]
Limited partners capital units owned		5,146,264
Initial Public Offering [Member] | Limited Partners [Member]
Organization [Line Items]
Common units issued in initial public offering	6,786,869
Common units issued, per unit	$19
Initial Public Offering [Member] | Underwriters' Over-allotment Option [Member] | Limited Partners [Member]
Organization [Line Items]
Common units issued in initial public offering	786,869
Gulf LNG Holdings [Member]
Organization [Line Items]
Limited liability company interest	10.30%

Summary_of_Significant_Account3

Summary of Significant Accounting Policies - Additional Information (Detail) (USD $)	3 Months Ended	12 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
	Segment
Accounting Policies [Abstract]
Impairment charges	$0	$0
Number of reportable segment	1

Summary_of_Significant_Account4

Summary of Significant Accounting Policies - Schedule of Goodwill (Detail) (USD $)	Mar. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Goodwill And Intangible Assets Disclosure [Abstract]
Beginning Balance	$15,162	$15,162	$15,162
Ending Balance	$15,162	$15,162	$15,162

Acquisitions_Additional_Inform

Acquisitions - Additional Information (Detail) (JBBR Purchase Agreement [Member], USD $)	0 Months Ended	1 Months Ended	3 Months Ended
In Millions, unless otherwise specified	Feb. 19, 2015	Feb. 28, 2015	Mar. 31, 2015
Business Acquisition [Line Items]
Business acquisition, date of acquisition agreement			19-Feb-15
Cash paid to seller	$216	$216
Earn-out payments			$27
Partnership [Member]
Business Acquisition [Line Items]
Business combination, equity interest in acquire percentage	60.00%	60.00%
GE Energy Financial Services [Member]
Business Acquisition [Line Items]
Business combination, equity interest in acquire percentage	40.00%	40.00%

Investment_in_Unconsolidated_A2

Investment in Unconsolidated Affiliate - Schedule of Investments in Unconsolidated Affiliate (Detail) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Investments In And Advances To Affiliates Schedule Of Investments [Abstract]
Beginning balance	$72,858
Equity earnings	2,489	2,437
Contributions	310	165
Distributions	-1,775
Amortization of premium	-78
Other comprehensive income	-471	-88
Ending balance	$73,333

Investment_in_Unconsolidated_A3

Investment in Unconsolidated Affiliate - Additional Information (Detail) (USD $)	3 Months Ended		1 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Nov. 30, 2013
Business Acquisition [Line Items]
Purchase of LNG Interest from an affiliate	$310,000	$165,000
Gulf LNG Holdings Group, LLC Acquisition [Member]
Business Acquisition [Line Items]
Purchase of LNG Interest from an affiliate			72,700,000
Carrying value of LNG Interest			64,100,000
Purchase price excess paid over the carrying value			$8,600,000
Long lived assets useful life	28 years

Investment_in_Unconsolidated_A4

Investment in Unconsolidated Affiliate - Schedule of Estimated Aggregate Amortization of Premium (Detail) (Gulf LNG Holdings Group, LLC Acquisition [Member], USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015
Gulf LNG Holdings Group, LLC Acquisition [Member]
Business Acquisition [Line Items]
Estimated future amortization expense, 2015	$231
Estimated future amortization expense, 2016	309
Estimated future amortization expense, 2017	309
Estimated future amortization expense, 2018	309
Estimated future amortization expense, 2019	309
Estimated future amortization expense, Thereafter	6,753
Total future amortization expense	$8,220

Investment_in_Unconsolidated_A5

Investment in Unconsolidated Affiliate - Summarized Financial Information for the Gulf LNG Holdings (Detail) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
Balance sheets
Current assets	$11,355		$12,756
Total assets	329,485		331,588
Current liabilities	6,568		4,712
Total liabilities and partners’ capital	329,485		331,588
Income statements
Revenues	13,557	13,213
Total operating costs and expenses	14,744	12,829
Operating (loss) income	-1,187	384
Net income	304	1,861
Gulf LNG Holdings Group, LLC Acquisition [Member]
Balance sheets
Current assets	9,767		12,537
Noncurrent assets	920,489		926,980
Total assets	930,256		939,517
Current liabilities	77,281		85,818
Long-term liabilities	727,286		733,401
Member’s equity	125,689		120,298
Total liabilities and partners’ capital	930,256		939,517
Income statements
Revenues	46,624	46,561
Total operating costs and expenses	14,206	14,280
Operating (loss) income	32,418	32,281
Net income	$24,165	$23,656

Property_Plant_and_Equipment_S

Property, Plant and Equipment - Schedule of Property, Plant and Equipment (Detail) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$220,257	$218,714
Less: Accumulated depreciation	-24,672	-22,828
Property, plant and equipment, net	195,585	195,886
Land [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	49,615	49,615
Building and Site Improvements [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	36,356	36,298
Tanks and Trim [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	91,600	91,463
Machinery and Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	33,010	32,815
Office Furniture and Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	2,353	2,348
Construction in Progress [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$7,323	$6,175

Property_Plant_and_Equipment_A

Property, Plant and Equipment - Additional Information (Detail) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014
Property Plant And Equipment [Abstract]
Impairment loss	$6.10

Intangible_Assets_Summary_of_P

Intangible Assets - Summary of Partnership's Intangible Assets (Detail) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Finite Lived Intangible Assets [Line Items]
Intangible assets, gross	$45,426	$45,426
Less: Accumulated amortization	-13,405	-12,237
Intangible assets, net	32,021	33,189
Customer Relationships [Member]
Finite Lived Intangible Assets [Line Items]
Intangible assets estimated useful life	21 years
Intangible assets, gross	4,785	4,785
Contract-Based Intangible Assets [Member]
Finite Lived Intangible Assets [Line Items]
Intangible assets, gross	39,900	39,900
Contract-Based Intangible Assets [Member] | Minimum [Member]
Finite Lived Intangible Assets [Line Items]
Intangible assets estimated useful life	2 years
Contract-Based Intangible Assets [Member] | Maximum [Member]
Finite Lived Intangible Assets [Line Items]
Intangible assets estimated useful life	10 years
Noncompete Agreements [Member]
Finite Lived Intangible Assets [Line Items]
Intangible assets, gross	$741	$741
Noncompete Agreements [Member] | Minimum [Member]
Finite Lived Intangible Assets [Line Items]
Intangible assets estimated useful life	2 years
Noncompete Agreements [Member] | Maximum [Member]
Finite Lived Intangible Assets [Line Items]
Intangible assets estimated useful life	3 years

Intangible_Assets_Additional_I

Intangible Assets - Additional Information (Detail) (USD $)	Mar. 31, 2015
In Millions, unless otherwise specified
Finite Lived Intangible Assets Future Amortization Expense [Abstract]
Estimated future amortization expense, remainder of 2015	$3.10
Estimated future amortization expense, 2016	3.9
Estimated future amortization expense, 2017	3.9
Estimated future amortization expense, 2018	3.9
Estimated future amortization expense, 2019	3.9
Estimated future amortization expense, thereafter	$13.30

Debt_Additional_Information_De

Debt - Additional Information (Detail) (USD $)	1 Months Ended	3 Months Ended
	Nov. 30, 2013	Mar. 31, 2015	Dec. 31, 2014	Feb. 28, 2015
Line Of Credit Facility [Line Items]
Line of Credit Facility, amount		24,400,000
Credit facility		111,063,000	111,063,000
Line of Credit Facility, interest rate		2.93%
Sublimit for issuance of swing line loans	5,000,000
Percentage of increase in interest rate on default exists	2.00%
Minimum [Member]
Line Of Credit Facility [Line Items]
Commitment fee percentage on unused portion of facility	0.38%
Maximum [Member]
Line Of Credit Facility [Line Items]
Commitment fee percentage on unused portion of facility	0.50%
Credit Facility [Member]
Line Of Credit Facility [Line Items]
Line of Credit Facility, amount	175,000,000
Amount of commitments under the Credit Facility	100,000,000
Credit Facility, maturity date		30-Nov-18
Maximum Credit Facility to be maintained as per credit facility	4.5
Minimum interest coverage ratio	2.5
Maximum secured leverage ratio	3.5
Credit Facility [Member] | Senior Notes [Member]
Line Of Credit Facility [Line Items]
Future issuance of debt	200,000,000
Credit Facility [Member] | Maximum [Member]
Line Of Credit Facility [Line Items]
Increase in Partnership leverage ratio	5
Credit Facility [Member] | Base Rate [Member] | Minimum [Member]
Line Of Credit Facility [Line Items]
Basis points spread on floating rate debt	1.00%
Credit Facility [Member] | Base Rate [Member] | Maximum [Member]
Line Of Credit Facility [Line Items]
Basis points spread on floating rate debt	2.00%
Credit Facility [Member] | London Interbank Offered Rate (LIBOR) [Member] | Minimum [Member]
Line Of Credit Facility [Line Items]
Basis points spread on floating rate debt	2.00%
Credit Facility [Member] | London Interbank Offered Rate (LIBOR) [Member] | Maximum [Member]
Line Of Credit Facility [Line Items]
Basis points spread on floating rate debt	3.00%
Credit Facility [Member] | One-Month LIBOR Rate [Member]
Line Of Credit Facility [Line Items]
Basis points spread on floating rate debt	1.00%
Credit Facility [Member] | Federal Funds Rate [Member]
Line Of Credit Facility [Line Items]
Basis points spread on floating rate debt	0.50%
Credit Facility [Member] | Standby Letters of Credit [Member]
Line Of Credit Facility [Line Items]
Sublimit for letters of credit	10,000,000
SunTrust senior secured credit facility
Line Of Credit Facility [Line Items]
Line of Credit Facility, amount				275,000,000
Line of credit facility maximum borrowing capacity				100.00%
JBBR Acquisition [Member]
Line Of Credit Facility [Line Items]
Letter of credit outstanding amount		10,000,000

Partners_Capital_and_Distribut2

Partners' Capital and Distributions - Schedule of the Quarterly Distributions Related to the Partnership's Quarterly Financial Results (Detail) (USD $)	3 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014
Incentive Distribution Managing Member Or General Partner [Abstract]
Total Quarterly Distribution Per Unit	$0.41	$0.41	$0.41	$0.40	$0.39
Total Cash Distribution	$5,309	$5,309	$5,309	$5,180	$5,018
Date of Distribution	15-May-15	17-Feb-15	17-Nov-14	18-Aug-14	16-May-14
Unitholders Record Date	11-May-15	9-Feb-15	10-Nov-14	11-Aug-14	9-May-14

Partners_Capital_and_Distribut3

Partners' Capital and Distributions - Additional Information (Detail) (USD $)	3 Months Ended
	Mar. 31, 2015
Limited Partners Capital Account [Line Items]
Cash distribution after period end of each quarter	60 days
Annualized minimum quarterly distribution on each outstanding common and subordinated units, percentage	150.00%
Annualized minimum quarterly distribution on each outstanding common and subordinated units	$2.33
Conversion basis	When the subordination period ends, all subordinated units will convert into common units on a one-for-one basis, and all common units thereafter will no longer be entitled to arrearages.
Annualized Basis [Member]
Limited Partners Capital Account [Line Items]
Cash distribution received, per unit	$1.55
Common Units [Member]
Limited Partners Capital Account [Line Items]
Cash distribution received, per unit	$0.39
Subordinated Units [Member]
Limited Partners Capital Account [Line Items]
Cash distribution received, per unit	$0.39
All Unitholders [Member]
Limited Partners Capital Account [Line Items]
Cash distribution received, per unit	$0.45

Partners_Capital_and_Distribut4

Partners' Capital and Distributions - Percentage of Incentive Distribution Rights to Partnership's Unitholders and General Partner (Detail)	3 Months Ended
	Mar. 31, 2015
Above $0.3875 up to $0.4456 [Member] | Unitholders [Member]
Incentive Distribution Made To Managing Member Or General Partner [Line Items]
Marginal Percentage Interest in Distributions	100.00%
Above $0.3875 up to $0.4456 [Member] | General Partner [Member]
Incentive Distribution Made To Managing Member Or General Partner [Line Items]
Marginal Percentage Interest in Distributions	0.00%
Above $0.4456 up to $0.4844 [Member] | Unitholders [Member]
Incentive Distribution Made To Managing Member Or General Partner [Line Items]
Marginal Percentage Interest in Distributions	85.00%
Above $0.4456 up to $0.4844 [Member] | General Partner [Member]
Incentive Distribution Made To Managing Member Or General Partner [Line Items]
Marginal Percentage Interest in Distributions	15.00%
Above $0.4844 up to $0.5813 [Member] | Unitholders [Member]
Incentive Distribution Made To Managing Member Or General Partner [Line Items]
Marginal Percentage Interest in Distributions	75.00%
Above $0.4844 up to $0.5813 [Member] | General Partner [Member]
Incentive Distribution Made To Managing Member Or General Partner [Line Items]
Marginal Percentage Interest in Distributions	25.00%
Above $0.5813 [Member] | Unitholders [Member]
Incentive Distribution Made To Managing Member Or General Partner [Line Items]
Marginal Percentage Interest in Distributions	50.00%
Above $0.5813 [Member] | General Partner [Member]
Incentive Distribution Made To Managing Member Or General Partner [Line Items]
Marginal Percentage Interest in Distributions	50.00%

Partners_Capital_and_Distribut5

Partners' Capital and Distributions - Percentage of Incentive Distribution Rights to Partnership's Unitholders and General Partner (Parenthetical) (Detail) (USD $)	3 Months Ended
	Mar. 31, 2015
Minimum [Member] | Above $0.3875 up to $0.4456 [Member]
Incentive Distribution Made To Managing Member Or General Partner [Line Items]
Cash distribution paid, per unit	$0.39
Minimum [Member] | Above $0.4456 up to $0.4844 [Member]
Incentive Distribution Made To Managing Member Or General Partner [Line Items]
Cash distribution paid, per unit	$0.45
Minimum [Member] | Above $0.4844 up to $0.5813 [Member]
Incentive Distribution Made To Managing Member Or General Partner [Line Items]
Cash distribution paid, per unit	$0.48
Minimum [Member] | Above $0.5813 [Member]
Incentive Distribution Made To Managing Member Or General Partner [Line Items]
Cash distribution paid, per unit	$0.58
Maximum [Member] | Above $0.3875 up to $0.4456 [Member]
Incentive Distribution Made To Managing Member Or General Partner [Line Items]
Cash distribution paid, per unit	$0.45
Maximum [Member] | Above $0.4456 up to $0.4844 [Member]
Incentive Distribution Made To Managing Member Or General Partner [Line Items]
Cash distribution paid, per unit	$0.48
Maximum [Member] | Above $0.4844 up to $0.5813 [Member]
Incentive Distribution Made To Managing Member Or General Partner [Line Items]
Cash distribution paid, per unit	$0.58

Equity_Plans_Additional_Inform

Equity Plans - Additional Information (Detail) (USD $)	3 Months Ended	1 Months Ended
	Mar. 31, 2015	Jul. 31, 2014	Nov. 30, 2013
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Unit-based compensation	$1,535,000
Payments to phantom unit holders	215,000
Unit-based compensation	1,535,000
Phantom Units
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of shares granted under the plan		939,500
Phantom Units | Directors Grant
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting period	3 years
Unit-based compensation	200,000
Unrecognized unit-based compensation expense	2,000,000
Employee Equity Grants
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Unit-based compensation	1,300,000
Employee Equity Grants Vest One
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Unrecognized unit-based compensation expense	17,300,000
2015 Equity Grants
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Aggregate grant date fair value	900,000
Vesting period	3 years
Unit-based compensation	100,000
Unrecognized unit-based compensation expense	900,000
2013 Long-Term Incentive Plan | Selling, general and administrative
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Unit-based compensation	1,500,000
2013 Long-Term Incentive Plan | Other non-current liabilities
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Unit-based compensation	100,000
2013 Long-Term Incentive Plan | Employee Equity Grants Tranche One
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Employee equity grants vest percentage		25.00%
2013 Long-Term Incentive Plan | Phantom Units
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Payments to phantom unit holders	400,000
2013 Long-Term Incentive Plan | Phantom Units | Directors Grant
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of shares granted under the plan		100,000
Aggregate grant date fair value		2,500,000
2013 Long-Term Incentive Plan | Phantom Units Which Will Be Settled In Cash | Minimum [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of shares granted under the plan		1,000
2013 Long-Term Incentive Plan | Employee Equity Grants
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of shares granted under the plan		832,000
Aggregate grant date fair value		21,200,000
2013 Long-Term Incentive Plan | Employee Equity Grants Vest One
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Employee equity grants vest percentage		25.00%
Cash distribution received, per unit		0.4457
2013 Long-Term Incentive Plan | Employee Equity Grants Vest Two
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Employee equity grants vest percentage		25.00%
Cash distribution received, per unit		0.4845
2013 Long-Term Incentive Plan | Employee Equity Grants Vest Three
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Employee equity grants vest percentage		25.00%
Cash distribution received, per unit		0.5814
2013 Long-Term Incentive Plan | Employee Liability Grants
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of shares granted under the plan		7,500
Aggregate grant date fair value		200,000
Unit-based compensation	100,000
Unrecognized unit-based compensation expense	100,000
2013 Long-Term Incentive Plan | 2015 Equity Grants
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of shares granted under the plan	45,668
2013 Long-Term Incentive Plan | Employee Equity Grants And Consultants
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Payments to phantom unit holders	200,000
Unit-based compensation	$200,000
Common Units [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized			2,000,000

Equity_Plans_Summary_of_Phanto

Equity Plans - Summary of Phantom Units Granted (Detail) (USD $)	3 Months Ended
	Mar. 31, 2015	Dec. 31, 2014
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of Phantom Units, Ending Balance	0
Equity Award [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of Phantom Units, Beginning Balance	928,500
Number of Phantom Units, Granted	45,668
Number of Phantom Units, Forfeited	-6,000
Number of Phantom Units, Ending Balance	968,168
Weighted Avg. Grant Date Fair Value, Beginning Balance	$25.46
Weighted Avg. Grant Date Fair Value, Granted	$19.13
Weighted Avg. Grant Date Fair Value, Forfeited	$25.46
Weighted Avg. Grant Date Fair Value, Ending Balance	$25.16
Liability Award [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of Phantom Units, Beginning Balance		7,500
Number of Phantom Units, Ending Balance	7,500	7,500
Weighted Avg. Grant Date Fair Value, Beginning Balance		$25.46
Weighted Avg. Grant Date Fair Value, Ending Balance	$25.46	$25.46
Fair Value, Beginning Balance		$19.28
Fair Value, Ending Balance	$19.28	$19.28

Earnings_Per_Unit_Additional_I

Earnings Per Unit - Additional Information (Detail)	Mar. 31, 2015
Earnings Per Share [Abstract]
Number of Phantom units, outstanding	0

Earnings_Per_Unit_Schedule_of_

Earnings Per Unit - Schedule of Earnings Per Unit (Detail) (USD $)	3 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Earnings Per Share Diluted [Line Items]
Net income	$304	$1,861
Less: Distribution equivalent rights for unissued units	230
Net income available to limited partners	74	1,861
Numerator for basic and diluted earnings per limited partner unit:
Net income available to limited partners	74	1,861
Common Units [Member]
Numerator for basic and diluted earnings per limited partner unit:
Net income available to limited partners	39	987
Denominator for basic and diluted earnings per limited partner unit:
Denominator for basic and diluted earnings per limited partner unit, basic and diluted	6,868	6,868
Earnings per limited partner unit:
Earnings per limited partner unit, basic and diluted	$0.01	$0.14
Subordinated Units [Member]
Numerator for basic and diluted earnings per limited partner unit:
Net income available to limited partners	$35	$874
Denominator for basic and diluted earnings per limited partner unit:
Denominator for basic and diluted earnings per limited partner unit, basic and diluted	6,081	6,081
Earnings per limited partner unit:
Earnings per limited partner unit, basic and diluted	$0.01	$0.14

Related_Party_Transactions_Add

Related Party Transactions - Additional Information (Detail) (USD $)	0 Months Ended	3 Months Ended		1 Months Ended		0 Months Ended
	Feb. 19, 2015	Mar. 31, 2015	Mar. 31, 2014	Feb. 28, 2015	Jan. 31, 2014	31-May-13	31-May-11	Feb. 28, 2010	Dec. 31, 2014	Feb. 28, 2013
		bbl								Boe
Related Party Transaction [Line Items]
Selling, general and administrative expenses-affiliate		$1,076,000	$884,000
Due to general partner		2,691,000							409,000
Registration rights agreement		In connection with the IPO, the Partnership entered into a registration rights agreement with the Sponsor. Pursuant to the registration rights agreement, the Partnership is required to file, upon request of the Sponsor, a registration statement to register the common units issued to the Sponsor and the common units issuable upon the conversion of the subordinated units held by the Sponsor. In addition, the registration rights agreement gives the Sponsor piggyback registration rights under certain circumstances.
Partnership's Credit Facility		24,400,000
Lease agreement rent expenses		230,000
Lease agreement rent expenses for future period		417,522
Rent amount increase effective date		2014-08
Operating leases, Rent expense increased		95,800
Number of barrels per day of oil equivalent		12,500
Percentage of variable rate on base rent		30.00%
Operating lease agreement expense		1,600,000	1,600,000
Percentage of partner interest in partnership	40.30%
Percentage of interest in general partner	100.00%
Proceeds from private placement	75,000,000
PIPE Transaction [Member]
Related Party Transaction [Line Items]
Business combination, equity interest in acquire percentage	60.00%
Sale of common units, shares	4,411,765	4,520,795
Price per unit of common units	$17	$16.59
Commitment fee percentage	1.00%
Private placement transaction due date	18-May-15
Commitment payment period	90 days
JBBR Purchase Agreement [Member]
Related Party Transaction [Line Items]
Cash paid for Partnership acquired	216,000,000			216,000,000
Business acquisition, date of acquisition agreement		19-Feb-15
Earn-out payments		27,000,000
Ratably portion of acquisition purchase price	130,000,000
JBBR Purchase Agreement [Member] | Partnership [Member]
Related Party Transaction [Line Items]
Business combination, equity interest in acquire percentage	60.00%			60.00%
Equity Commitment Letters [Member]
Related Party Transaction [Line Items]
Business acquisition, date of acquisition agreement	19-Feb-15
MTP Energy Master Fund Ltd [Member]
Related Party Transaction [Line Items]
Net proceeds from Offering	9,500,000
Portland Terminal [Member]
Related Party Transaction [Line Items]
Lease agreement rent expenses for future period		65,700,000
Portland Terminal [Member] | Arc Terminals Holdings [Member]
Related Party Transaction [Line Items]
Lease agreement notice period		So long as Arc Terminals Holdings is not in default under the Lease Agreement, it shall have the right to purchase the Portland Terminal at the end of the third year of the Lease Agreement and at the end of any month thereafter by delivery of 90 days’ notice (“Purchase Option”). The purchase price shall be the greater of (i) nine times the total of base rent and variable rent for the 12 months immediately preceding the notice and (ii) $65.7 million.
Operating lease termination notice		12 months
Fifth Anniversary [Member] | Arc Terminals Holdings [Member]
Related Party Transaction [Line Items]
Operating lease termination fee		4,000,000
Tenth Anniversary [Member] | Arc Terminals Holdings [Member]
Related Party Transaction [Line Items]
Operating lease termination fee		6,000,000
Minimum [Member]
Related Party Transaction [Line Items]
Percentage of change in the consumer price index		2.00%
LCP Oregon Holdings LLC [Member]
Related Party Transaction [Line Items]
Construction costs estimated		10,000,000
Description of increase in base rent		increased each month starting with the month of August 2014 by a factor of 0.00958 of the specified construction costs incurred by LCP Oregon Holdings LLC (“LCP Oregon”) at the Portland Terminal
CorEnergy [Member]
Related Party Transaction [Line Items]
Operating leases, Rent expense increased		72,000
Operating lease, additional spending		7,500,000
Lightfoot Capital Partners LP [Member]
Related Party Transaction [Line Items]
Percentage of investment in subsidiary					6.60%
Lightfoot Capital Partners GP LLC [Member]
Related Party Transaction [Line Items]
Percentage of investment in subsidiary					1.50%
Initial term of lease agreement					15 years
Additional term for lease agreement					5 years
Gulf Coast Asphalt Company, L.L.C. [Member]
Related Party Transaction [Line Items]
Partnership's Credit Facility		20,000,000
Number of barrels of storage tanks										150,000
Initial term of agreement		5 years
Earn-out payments		5,000,000
Center Oil [Member]
Related Party Transaction [Line Items]
Cash paid for Partnership acquired		35,000,000
Number of terminals acquired		7
Written notification for termination of agreement		The term of the storage and throughput agreement extends through June 2017. The agreement will automatically renew for a period of three years at the expiration of the current term at an inflation adjusted rate (subject to a cap), as determined in accordance with the agreement, unless a party delivers a written notice of its election to terminate the storage and throughput agreement at least eighteen months prior to the expiration of the current term.
Agreement extension, month and year		2017-06
Agreement renewal term		3 years
GE Energy Financial Services [Member] | JBBR Purchase Agreement [Member]
Related Party Transaction [Line Items]
Business combination, equity interest in acquire percentage	40.00%			40.00%
G E Equity Provider | Equity Commitment Letters [Member]
Related Party Transaction [Line Items]
Business combination, equity interest in acquire percentage	40.00%
General Partner [Member]
Related Party Transaction [Line Items]
Selling, general and administrative expenses-affiliate		1,100,000	900,000
Due to general partner		$2,700,000							$400,000
Limited Partners [Member] | Center Oil [Member]
Related Party Transaction [Line Items]
Partnership units issued on acquisition		750,000
Agreement renewal term						1 year	1 year
Valuation percentage of assets at the time of acquisition								50.00%
Agreements extended month and year								2016-05
Agreement renewal, month and year							2015-05

Related_Party_Transactions_Sch

Related Party Transactions - Schedule of Revenue from Related Parties (Detail) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Related Party Transaction [Line Items]
Related parties	$2,178	$2,338
Center Oil [Member]
Related Party Transaction [Line Items]
Related parties	1,728	1,885
Gulf Coast Asphalt Company, L.L.C. [Member]
Related Party Transaction [Line Items]
Related parties	$450	$453

Related_Party_Transactions_Sch1

Related Party Transactions - Schedule of Accounts Receivable due from Related Parties (Detail) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified
Notes Receivable Related Parties [Line Items]
Due from related parties	$946	$900
Center Oil [Member]
Notes Receivable Related Parties [Line Items]
Due from related parties	636	594
Gulf Coast Asphalt Company, L.L.C. [Member]
Notes Receivable Related Parties [Line Items]
Due from related parties	$310	$306

Major_Customers_Additional_Inf

Major Customers - Additional Information (Detail) (Sales Revenue, Net [Member])	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Entity Wide Revenue Major Customer [Line Items]
Total percentages of revenue and receivables associated with significant customers	38.00%	24.00%
Minimum [Member] | Customer Concentration Risk [Member]
Entity Wide Revenue Major Customer [Line Items]
Total percentages of revenue and receivables associated with significant customers	10.00%

Major_Customers_Schedules_of_P

Major Customers - Schedules of Percentages of Revenues and Receivables Associated with Significant Customers (Detail)	3 Months Ended		12 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
Sales Revenue, Net [Member]
Entity Wide Revenue Major Customer [Line Items]
Total percentages of revenue and receivables associated with significant customers	38.00%	24.00%
Sales Revenue, Net [Member] | Customer A [Member]
Entity Wide Revenue Major Customer [Line Items]
Total percentages of revenue and receivables associated with significant customers	25.00%	10.00%
Sales Revenue, Net [Member] | Customer B [Member]
Entity Wide Revenue Major Customer [Line Items]
Total percentages of revenue and receivables associated with significant customers	13.00%	14.00%
Receivables [Member]
Entity Wide Revenue Major Customer [Line Items]
Total percentages of revenue and receivables associated with significant customers	35.00%		39.00%
Receivables [Member] | Customer A [Member]
Entity Wide Revenue Major Customer [Line Items]
Total percentages of revenue and receivables associated with significant customers	23.00%		26.00%
Receivables [Member] | Customer B [Member]
Entity Wide Revenue Major Customer [Line Items]
Total percentages of revenue and receivables associated with significant customers	12.00%		13.00%

Commitments_and_Contingencies_1

Commitments and Contingencies - Additional Information (Detail) (USD $)	3 Months Ended
	Mar. 31, 2015	Dec. 31, 2014
	Customer
Operating Leased Assets [Line Items]
Accruals for environmental losses	$0	$0
Gulf Coast Asphalt Company, L.L.C. [Member]
Operating Leased Assets [Line Items]
Earn-out payments	5,000,000
Earnout payments, low	0
Number of customers	1
Gulf LNG Holdings [Member]
Operating Leased Assets [Line Items]
Capital call	14,600,000
Partnership pro-rata share of committed capital	1,500,000
Partnership pro-rata share of remaining capital	0
Gulf LNG Holdings [Member] | Maximum [Member]
Operating Leased Assets [Line Items]
Spending towards the development of natural gas liquefaction and export terminal		$14,600,000

Commitments_and_Contingencies_2

Commitments and Contingencies - Schedule of Future Non-Cancelable Commitments Related to Certain Contractual Obligations (Detail) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified
Commitments And Contingencies Disclosure [Abstract]
Long-term debt obligations, Total	$111,063	$111,063
Long-term debt obligations, 2015	0
Long-term debt obligations, 2016	0
Long-term debt obligations, 2017	0
Long-term debt obligations, 2018	0
Long-term debt obligations, 2019	111,063
Long-term debt obligations, thereafter	0
Operating lease obligations, Total	28,394
Operating lease obligations, 2015	4,787
Operating lease obligations, 2016	6,416
Operating lease obligations, 2017	6,284
Operating lease obligations, 2018	6,288
Operating lease obligations, 2019	4,619
Operating lease obligations, thereafter	0
Contractual obligations, Total	139,457
Contractual obligations, 2015	4,787
Contractual obligations, 2016	6,416
Contractual obligations, 2017	6,284
Contractual obligations, 2018	6,288
Contractual obligations, 2019	115,682
Contractual obligations, thereafter	$0

Subsequent_Events_Additional_I

Subsequent Events - Additional Information (Detail) (USD $)	3 Months Ended					1 Months Ended	0 Months Ended	1 Months Ended
	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Jul. 31, 2014	7-May-15	Apr. 30, 2015	Nov. 30, 2013
Subsequent Event [Line Items]
Line of Credit Facility, amount	$24,400,000
Cash distribution, total amount	5,309,000	5,309,000	5,309,000	5,180,000	5,018,000
Total distribution per unit	$0.41	$0.41	$0.41	$0.40	$0.39
Cash distribution payment date	15-May-15	17-Feb-15	17-Nov-14	18-Aug-14	16-May-14
Cash distribution date of record	11-May-15	9-Feb-15	10-Nov-14	11-Aug-14	9-May-14
Phantom Units
Subsequent Event [Line Items]
Number of shares granted under the plan						939,500
Credit Facility [Member]
Subsequent Event [Line Items]
Line of Credit Facility, amount									175,000,000
Subsequent Event [Member]
Subsequent Event [Line Items]
Cash distribution, declaration month and year							2015-05
Cash distribution, total amount							5,300,000
Cash distribution payment date							15-May-15
Cash distribution date of record							11-May-15
Subsequent Event [Member] | Quarterly Distribution [Member]
Subsequent Event [Line Items]
Total distribution per unit							$0.41
Subsequent Event [Member] | Annual Distribution [Member]
Subsequent Event [Line Items]
Total distribution per unit							$1.64
Subsequent Event [Member] | Phantom Units
Subsequent Event [Line Items]
Number of shares granted under the plan								32,500
Subsequent Event [Member] | Credit Facility [Member]
Subsequent Event [Line Items]
Line of Credit Facility, amount								175,000,000
Subsequent Event [Member] | Credit Facility [Member] | Second Amendment [Member]
Subsequent Event [Line Items]
Line of Credit Facility, amount								275,000,000