Zenith Energy Logistics Partners (ARCX) 10-K 12 Mar 15 2014 FY Annual report Financial data

Document_and_Entity_Informatio

Document and Entity Information (USD $)	12 Months Ended
	Dec. 31, 2014	Jun. 30, 2014	Mar. 06, 2015
Document And Entity Information [Line Items]
Document Type	10-K
Amendment Flag	FALSE
Document Period End Date	31-Dec-14
Document Fiscal Year Focus	2014
Document Fiscal Period Focus	FY
Trading Symbol	ARCX
Entity Registrant Name	Arc Logistics Partners LP
Entity Central Index Key	1583744
Current Fiscal Year End Date	-19
Entity Well-known Seasoned Issuer	No
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Filer Category	Accelerated Filer
Entity Public Float		$167,808,000
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

Consolidated_Balance_Sheets

Consolidated Balance Sheets (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Current assets:
Cash and cash equivalents	$6,599	$4,454
Trade accounts receivable	3,746	4,403
Due from related parties	900	722
Inventories	285	302
Other current assets	1,226	777
Total current assets	12,756	10,658
Property, plant and equipment, net	195,886	201,477
Investment in unconsolidated affiliate	72,858	72,046
Intangible assets, net	33,189	38,307
Goodwill	15,162	15,162
Other assets	1,737	1,716
Total assets	331,588	339,366
Current liabilities:
Accounts payable	2,136	4,115
Accrued expenses	2,133	2,144
Due to general partner	409	127
Other liabilities	34	25
Total current liabilities	4,712	6,411
Credit facility	111,063	105,563
Other non-current liabilities	2,747	0
Commitments and contingencies
Partners’ capital:
General partner interest	0	0
Limited partners’ interest
Accumulated other comprehensive income	348	492
Total partners’ capital	213,066	227,392
Total liabilities and partners’ capital	331,588	339,366
Common Units [Member]
Limited partners’ interest
Limited partners' units	119,130	125,375
Subordinated Units [Member]
Limited partners’ interest
Limited partners' units	$93,588	$101,525

Consolidated_Balance_Sheets_Pa

Consolidated Balance Sheets (Parenthetical)	Dec. 31, 2014	Dec. 31, 2013
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

Consolidated_Statements_of_Ope

Consolidated Statements of Operations and Comprehensive Income (USD $)	12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Revenues:
Third-party customers	$45,676	$39,662	$13,201
Related parties	9,230	8,179	9,663
Revenues	54,906	47,841	22,864
Expenses:
Operating expenses	27,591	19,291	7,266
Selling, general and administrative	9,396	7,116	2,283
Selling, general and administrative – affiliate	3,990	2,484	2,592
Depreciation	7,261	5,836	3,317
Amortization	5,427	4,756	624
Long-lived asset impairment	6,114
Total expenses	59,779	39,483	16,082
Operating income	-4,873	8,358	6,782
Other income (expense):
Gain on bargain purchase of business		11,777
Equity earnings from unconsolidated affiliate	9,895	1,307
Other income	17	48	4
Interest expense	-3,706	-8,639	-1,320
Total other income (expenses), net	6,206	4,493	-1,316
Income before income taxes	1,333	12,851	5,466
Income taxes	58	20	43
Net Income	1,275	12,831	5,423
Less: Net income attributable to preferred units		1,770
Net income attributable to partners’ capital	1,275	11,061	5,423
Other comprehensive income	-144	492
Comprehensive income attributable to partners’ capital	$1,131	$11,553	$5,423
Common Units [Member]
Earnings per limited partner unit, basic:
Earnings per limited partner unit, basic	$0.05	$0.23	$0.89
Earnings per limited partner unit, diluted:
Earnings per limited partner unit, diluted	$0.05	$0.10	$0.89
Subordinated Units [Member]
Earnings per limited partner unit, basic:
Earnings per limited partner unit, basic	$0.05	$1.56	$0.89
Earnings per limited partner unit, diluted:
Earnings per limited partner unit, diluted	$0.05	$1.56	$0.89

Consolidated_Statements_of_Cas

Consolidated Statements of Cash Flows (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Cash flow from operating activities:
Net income	$1,275	$12,831	$5,423
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Depreciation	7,261	5,836	3,317
Amortization	5,427	4,756	624
Gain on bargain purchase of business		-11,777
Long-lived asset impairment	6,114
Equity earnings from unconsolidated affiliate, net of distributions	-68	0	0
Amortization of deferred financing costs	496	4,428	432
Unit-based compensation	3,138	0	0
Changes in operating assets and liabilities
Trade accounts receivable	658	-3,430	-31
Due from related parties	-179	120	24
Inventories	17	-47	-6
Other current assets	-449	-606	105
Accounts payable	-3,151	1,765	1,931
Accrued expenses	-10	680	-176
Due to general partner	281	-88	-1,383
Other liabilities	2,756	-80	-250
Net cash provided by operating activities	23,566	14,388	10,010
Cash flows from investing activities:
Capital expenditures	-6,611	-14,108	-13,796
Investment in unconsolidated affiliate	-1,197	-72,740
Distributions from unconsolidated affiliate, net of equity earnings		1,144
Net cash paid for acquisitions	0	-82,000	0
Net cash used in investing activities	-7,808	-167,704	-13,796
Cash flows from financing activities:
Distributions	-18,179	-1,770	-6,081
Deferred financing costs	-518	-5,248	-1,152
Repayments to credit facility	-25,000	-50,937	-21,500
Proceeds from credit facility	30,500	126,000	32,000
Proceeds from initial public offering, net		117,296
Redemption of preferred units		-29,000
Distribution equivalent rights paid on unissued units	-416
Net cash (used in) provided by financing activities	-13,613	156,341	3,267
Net increase (decrease) in cash and cash equivalents	2,145	3,025	-519
Cash and cash equivalents, beginning of period	4,454	1,429	1,948
Cash and cash equivalents, end of period	6,599	4,454	1,429
Supplemental disclosure of cash flow information:
Cash paid for interest	3,398	4,586	1,184
Cash paid for income taxes	58	20	43
Non-cash investing and financing activities:
Issuance of preferred units		30,000
Deemed distributions to preferred units		1,770
Contribution of preferred units		1,000
Deferred financing costs in accrued expenses			11
(Decrease) Increase in purchases of property plant and equipment in accounts payable and accrued expenses	$1,173	$414	($1,095)

Consolidated_Statements_of_Par

Consolidated Statements of Partners' Capital (USD $)	Total	Preferred Interest [Member]	Limited Partner Common Interest [Member]	Limited Partner Subordinated Interest [Member]	Limited Partners [Member]	General Partners [Member]	Accumulated Other Comprehensive Income [Member]
In Thousands
Partners' (deficit) capital, beginning balance at Dec. 31, 2011	$98,201				$98,286	($85)
Net income	5,423				5,314	109
Cash distributions	-6,081				-5,959	-122
Partners' (deficit) capital, ending balance at Dec. 31, 2012	97,543				97,641	-98
Issuance of preferred units		30,000
Net income	12,831		6,805	6,026
Other comprehensive income	492						492
Deemed distributions	-1,770	1,770	-23	-1,747
Cash distributions		-1,770
Recapitalization	1,000	-30,000	1,297	97,246	-97,641	98
Issuance of common units, net of offering costs	117,296		117,296
Partners' (deficit) capital, ending balance at Dec. 31, 2013	227,392		125,375	101,525			492
Net income	1,275		675	600
Other comprehensive income	-144						-144
Cash distributions	-18,179		-9,642	-8,537
Unit-based compensation	3,138		3,138
Distribution equivalent rights paid on unissued units	-416		-416
Partners' (deficit) capital, ending balance at Dec. 31, 2014	$213,066		$119,130	$93,588			$348

Organization_and_Presentation

Organization and Presentation	12 Months Ended
	Dec. 31, 2014
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 consolidated financial statements to “Arc Terminals,” or the “Partnership” when used for periods prior to November 12, 2013, the closing date of the initial public offering of Arc Logistics Partners LP (the “IPO”), refer to Arc Terminals LP and its subsidiaries, which were contributed to Arc Logistics Partners LP in connection with the IPO, and references to “Arc Logistics,” or the “Partnership” when used for periods on or after the closing date of the IPO refer to Arc Logistics Partners LP and its subsidiaries. Unless the context clearly indicates otherwise, references to our “General Partner” for periods prior to the closing date of the IPO refer to Arc Terminals GP LLC which owned the general partner interest in Arc Terminals and references to our “General Partner” for periods on or after the closing date of the IPO 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 to the Partnership upon the consummation of the 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 used a portion of the proceeds from the IPO to acquire a 10.3% limited liability company interest in Gulf LNG Holdings, which is referred to herein as the “LNG Interest.”
	Organization and Initial Public Offering
	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. In connection with the IPO, the Partnership amended and restated the Terminal Credit Facility (as defined below, see “Note 7—Debt”).
	The $120.2 million of net proceeds from the IPO (including the underwriters’ option to purchase additional common units and after deducting the underwriting discount and structuring fee) were used to: (i) fund the purchase of the LNG Interest from an affiliate of GE EFS for approximately $72.7 million; (ii) make a cash distribution to GCAC as partial consideration for the contribution of its preferred units in Arc Terminals  to the Partnership of approximately $29.8 million; (iii) repay intercompany payables owed to the Sponsor of approximately $6.6 million; and (iv) reduce amounts outstanding under the Partnership’s Credit Facility (as defined below, see “Note 7—Debt”) by $6.0 million. The remaining funds were used for general partnership purposes, including the payment of transaction expenses related to the IPO and the Credit Facility.

Summary_of_Significant_Account

Summary of Significant Accounting Policies	12 Months Ended
	Dec. 31, 2014
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	Note 2—Summary of Significant Accounting Policies
	Basis of Presentation
	The accompanying consolidated financial statements were prepared in accordance with GAAP and under the rules and regulations of the SEC. The accompanying consolidated financial statements include the accounts of the Partnership and its wholly owned subsidiaries. All intercompany accounts and transactions have been eliminated in consolidation.
	The Partnership has disclosed consolidated figures of the Partnership as if the Partnership had operated since the inception of Arc Terminals. The contribution of Arc Terminals to Arc Logistics in connection with the IPO was not considered a business combination accounted for under the purchase method as it was a transfer of assets under common control and, accordingly, balances have been transferred at their historical cost. The combined financial statements for the periods prior to the contribution on November 12, 2013 have been prepared using Arc Terminals’ historical basis in the assets and liabilities, and include all revenues, costs, assets and liabilities attributed to Arc Terminals.
	During the first quarter of 2014, the Partnership identified a classification error in the Consolidated Statement of Cash Flows for the year ended December 31, 2013 associated with the distributions received from an unconsolidated affiliate for which a portion was incorrectly classified within net cash used in investing activities. The misclassification resulted in an understatement of “net cash used in investing activities” and “net cash provided by operating activities” of approximately $1.3 million. The misclassification had no impact on the Consolidated Balance Sheet or on the Consolidated Statement of Operations nor did it affect the net increase in cash and cash equivalents on the Consolidated Statement of Cash Flows as of or for the period ended December 31, 2013.
	The Partnership evaluated the effect of the misclassification on its previously issued financial statements for the year ended December 31, 2013 and concluded the impact was not material. The Partnership recognized the impact of this misclassification in this Annual Report on Form 10-K by increasing cash flow used in investing activities and cash flows provided by operating activities by $1.3 million for the year ended December 31, 2013 as compared to what was previously reported in the 2013 Form 10-K.
	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.
	Cash and Cash Equivalents
	The Partnership includes demand deposits with banks and all highly liquid investments with original maturities of three months or less in cash and cash equivalents. These balances are valued at cost, which approximates fair value.
	Trade Accounts Receivable
	Trade accounts receivable are recorded at the invoiced amount and do not bear interest. The Partnership reserves for specific trade accounts receivable when it is probable that all or a part of an outstanding balance will not be collected. The Partnership regularly reviews collectability and establishes or adjusts the allowance as necessary using the specific identification method. Account balances are charged off against the allowance after all means of collection have been exhausted and the potential for recovery is considered remote. There were no reserves for uncollectible amounts as of December 31, 2014 and 2013. During the year ended December 31, 2013, the Partnership wrote off less than $0.1 million of uncollectible receivables. No other amounts have been deemed uncollectible in the periods presented in the consolidated statements of operations and comprehensive income.
	Inventories
	Inventories consist of additives which are sold to customers and mixed with the various customer-owned liquid products stored in the Partnership’s terminals. Inventories are stated at the lower of cost or estimated net realizable value. Inventory costs are determined using the first-in, first-out method.
	Other Current Assets
	Other current assets consist primarily of prepaid expenses and deposits.
	Property, Plant and Equipment
	Property, plant and equipment is recorded at cost, less accumulated depreciation. The Partnership owns a 50% undivided interest in the property, plant and equipment at two terminal locations. At the time of acquisition, these assets were recorded at 50% of the aggregate fair value of the related property, plant and equipment. Expenditures for routine maintenance and repairs are charged to expense as incurred. Major improvements or expenditures that extend the useful life or productive capacity of assets are capitalized. Depreciation is recorded over the estimated useful lives of the applicable assets, using the straight-line method. The estimated useful lives are as follows:
	Building and site improvements			1–40 years
	Tanks and trim			1–40 years
	Machinery and equipment			1–40 years
	Office furniture and equipment			1–15 years
	Capitalized costs incurred by the Partnership during the year for major improvements and capital projects that are not completed as of year-end are recorded as construction in progress. Construction in progress is not depreciated until the related assets or improvements are ready for intended use. Additionally, the Partnership capitalizes interest costs as a part of the historical cost of constructing certain assets and includes such interest in the property, plant and equipment line on the balance sheet. Capitalized interest for the years ended December 31, 2014 and 2013 was $0.2 million and $0.4 million, respectively.
	Intangible Assets
	Intangible assets primarily consist of customer relationships, acquired contracts and a covenant not to compete which are amortized on a straight-line basis over the expected life of each intangible asset.
	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 years ended December 31, 2014, 2013 and 2012 except as discussed in “Note 5—Property, Plant and Equipment”.
	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. Goodwill impairment is determined using a two-step process. The first step of the goodwill impairment test is used to identify potential impairment by comparing the fair value of a reporting unit with its carrying amount, including goodwill. If the carrying amount of a reporting unit exceeds its fair value, the second step of the goodwill impairment test is performed. The second step compares the implied fair value of the reporting unit’s goodwill with the carrying amount of that goodwill. If the carrying amount of the reporting unit’s goodwill exceeds the implied fair value of that goodwill, an impairment loss is recognized in an amount equal to that excess. The implied fair value of goodwill is determined in the same manner as the amount of goodwill recognized in a business combination. The Partnership determines the fair value of its single reporting unit by blending two valuation approaches: the income approach and a market value approach. The Partnership determined at December 31, 2014, there were no impairment charges and no event indicating an impairment has occurred.
	No impairments were recorded against goodwill through December 31, 2014 and 2013.
		As of December 31,
		2014			2013
	Beginning Balance	$	15,162		$	6,730
	Goodwill acquired		-			8,432
	Impairment		-			-
	Ending Balance	$	15,162		$	15,162
	Other Assets
	Other assets consist primarily of debt issuance costs related to the Credit Facility amendment entered into in November 2013 (see “Note 7—Debt”). Debt issuance costs are capitalized and amortized over the term of the related debt using straight line amortization, which approximates the effective interest rate method. As of December 31, 2014, these costs were approximately $1.5 million.
	Investment in Unconsolidated Affiliate
	In connection with the IPO, the Partnership purchased the LNG Interest from an affiliate of GE EFS for approximately $72.7 million. The Partnership accounts for the LNG Interest using the equity method of accounting.
	Deferred Rent
	The Lease Agreement (as defined in “Note 13—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 consolidated balance sheets at December 31, 2014.
	Revenue Recognition
	Revenues from leased tank storage and delivery services are recognized as the services are performed. 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.
	Income Taxes
	Taxable income or loss of the Partnership generally is required to be reported on the income tax returns of the limited partners in accordance with the terms of the partnership agreement. Accordingly, no provision has been made in the accompanying consolidated financial statements for the limited partners’ federal income taxes. There are certain entity level state income taxes that are incurred at the Partnership level and have been recorded during the years ended December 31, 2014, 2013 and 2012.
	Tax returns for the years ended December 31, 2014, 2013, 2012, 2011 and 2010 are open to IRS and state audits. The Partnership is not aware of any uncertain tax positions as of December 31, 2014 and 2013.
	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 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). The carrying amount of the Terminal Credit Facility as well as the Partnership’s Credit Facility approximated fair value due to its short-term nature and market rate of interest (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 10—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 and preferred 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.”
	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.  This guidance will be effective for the Partnership beginning in the first quarter of 2017.
	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.

Acquisitions

Acquisitions	12 Months Ended
	Dec. 31, 2014
Business Combinations [Abstract]
Acquisitions
	Note 3—Acquisitions
	Acquisitions
	The following acquisitions were accounted for under the acquisition method of accounting whereby management utilized the services of third-party valuation consultants, along with estimates and assumptions provided by management, to estimate the fair value of the net assets acquired. The third-party valuation consultants utilized several appraisal methodologies including income, market and cost approaches to estimate the fair value of the identifiable assets acquired.
	Gulf Coast Asphalt Company, L.L.C. Asset Acquisition
	In February 2013, the Partnership acquired substantially all of the Mobile, AL and Saraland, AL operating assets (the “GCAC Asset Acquisition”) related to the terminalling business of GCAC for approximately $85.0 million (“GCAC Purchase Price”) consisting of approximately $25.0 million in cash, $30.0 million in new preferred units (see “Note 8—Preferred Units”) in the Partnership and $30.0 million of assumed debt which was simultaneously extinguished at the acquisition closing by the Partnership.
	The transaction was accounted for as a business combination in accordance with ASC Topic 805, “Business Combinations” (“ASC 805”). The GCAC Purchase Price exceeded the approximately $76.6 million fair value of the identifiable assets acquired and accordingly, the Partnership recognized goodwill of approximately $8.4 million. The Partnership believes the primary items that generated goodwill are both the value of the synergies created between the acquired assets and its existing assets, and its expected ability to grow the business acquired by leveraging its existing customer relationships. Furthermore, the Partnership expects that the entire amount of its recorded goodwill will be deductible for tax purposes. Transaction costs incurred in connection with the acquisition, consisting primarily of legal and other professional fees, totaled approximately $1.9 million and were expensed as incurred in accordance with ASC 805 and included in the ”Selling, general and administrative” line item in the accompanying consolidated statement of operations and comprehensive income. GCAC is also 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 December 31, 2014, no additional amounts have been paid or are owed to GCAC.
	The following table summarizes the consideration paid and the amounts of assets acquired at the acquisition date (in thousands):
	Consideration:
	Cash paid to seller	$	25,000
	Debt assumed		30,000
	Preferred units issued		30,000
	Total consideration	$	85,000
	Allocation of purchase price:
	Property and equipment	$	39,242
	Intangible assets		37,326
	Goodwill		8,432
	Net assets acquired	$	85,000
	Since the acquisition date in February 2013 through December 31, 2013, the acquired GCAC assets earned approximately $18.1 million in revenue and $9.7 million of operating income.
	The following unaudited pro forma financial results for the years ended December 31, 2013 and 2012 are presented for comparative purposes only and assume the GCAC acquisition had occurred on January 1, 2012. The effects of the GCAC Asset Acquisition are included in the accompanying consolidated statement of operations and comprehensive income for the year ended December 31, 2014. The unaudited pro forma results reflect certain adjustments to the acquisition, such as increased depreciation and amortization expense on the fair value of the assets acquired. The unaudited pro forma financial results may not be indicative of the results that would have occurred had the acquisition been completed at the beginning of the periods presented, nor are they indicative of future results of operations (in thousands, except per unit amounts):
			Year Ended
			December 31,
			2013		2012
			(Unaudited proforma)
	Total revenues		$	49,442	$	34,469
	Operating income			11,822		5,627
	Net Income		$	15,759	$	2,847
	Less: Net income attributable to preferred units		$	2,023	$	2,400
	Net income attributable to partners' capital		$	13,736	$	447
	Earnings per unit - Basic:
	Common and Subordinated		$	1.92	$	0.07
	Earnings per unit - Diluted:
	Common and Subordinated		$	1.86	$	0.07
	Motiva Enterprises LLC Asset Acquisition
	In February 2013, the Partnership acquired substantially all of the operating assets related to the Brooklyn, NY terminal (the “Brooklyn Terminal”) from Motiva Enterprises LLC (“Motiva”) for approximately $27.0 million (“Brooklyn Purchase Price”) in cash.
	The transaction was accounted for as a business combination in accordance with ASC 805. The fair value of the identifiable assets acquired of approximately $38.8 million exceeded the Brooklyn Purchase Price. Accordingly, the acquisition has been accounted for as a bargain purchase and, as a result, the Partnership recognized a gain of approximately $11.8 million associated with the acquisition. The gain is included in the line item “Gain on bargain purchase of business” in the accompanying consolidated statements of operations and comprehensive income. Transaction costs incurred in connection with the acquisition, consisting primarily of legal and other professional fees, totaled approximately $1.5 million and were expensed as incurred in accordance with ASC 805 and included in the ”Selling, general and administrative” line item in the accompanying consolidated statements of operations and comprehensive income.
	The following table summarizes the consideration paid and the amounts of assets acquired at the acquisition date (in thousands):
	Consideration:
	Cash paid to seller	$	27,000
	Allocation of purchase price:
	Property and equipment	$	36,749
	Inventory		19
	Intangible assets		2,009
	Bargain purchase gain		(11,777	)
	Net assets acquired	$	27,000
	Since the acquisition date in February 2013 through December 31, 2013, the Brooklyn Terminal earned approximately $6.0 million in revenue and $3.5 million of operating income.
	The unaudited pro forma results related to the Motiva acquisition have been excluded as the nature of the revenue-producing activities previously associated with the Brooklyn Terminal have changed substantially post-acquisition from intercompany revenue to third-party generated revenue. In addition, historical financial information for the Brooklyn Terminal prior to the acquisition is not indicative of how the Brooklyn Terminal is being operated since the Partnership’s acquisition and would be of no comparative value in understanding the future operations of the Brooklyn Terminal.

Investment_in_Unconsolidated_A

Investment in Unconsolidated Affiliate	12 Months Ended
	Dec. 31, 2014
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 December 31, 2014 and, 2013 are represented below (in thousands):
	Balance at December 31, 2012	$	-
	Investment in Gulf LNG Holdings, LLC		72,739
	Equity earnings		1,307
	Distributions		(2,451	)
	Amortization of premium		(41	)
	Other comprehensive income		492
	Balance at December 31, 2013	$	72,046
	Equity earnings		9,895
	Contributions		1,197
	Distributions		(9,827	)
	Amortization of premium		(309	)
	Other comprehensive income		(144	)
	Balance at December 31, 2014	$	72,858
	Gulf LNG Holdings Acquisition
	In connection with the IPO, 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 asset, which is 28 years. The estimated aggregate amortization of this premium for its remaining useful life from December 31, 2014 is as follows (in thousands):
		Total
	2015	$	309
	2016		309
	2017		309
	2018		309
	2019		309
	Thereafter		6,753
		$	8,298
	Summarized financial information for Gulf LNG Holdings is reported below (in thousands):
		As of December 31,
		2014			2013
	Balance sheets
	Current assets	$	12,537		$	8,694
	Noncurrent assets		926,980			952,630
	Total assets	$	939,517		$	961,324
	Current liabilities	$	85,818		$	81,173
	Long-term liabilities		733,401			773,115
	Member’s equity		120,298			107,036
	Total liabilities and member’s equity	$	939,517		$	961,324
		Year Ended December 31,
		2014			2013
	Income statements
	Revenues	$	186,243		$	186,090
	Total operating costs and expenses		56,743			56,146
	Operating income		129,500			129,944
	Net income	$	96,062		$	94,895
	For the year ended December 31, 2013, the Partnership calculated its equity earnings in the LNG Interest as shown in the table below (in thousands):
	Gulf LNG Holdings net income for the year ended December 31, 2013	$	94,895
	Percentage of Net Income attributable to the Partnership		13	%
	from November 12, 2013 through December 31, 2013
	Net Income attributable to the Partnership	$	12,689
	from November 12, 2013 through December 31, 2013
	Percentage of ownership in Gulf LNG Holdings		10.3	%
	Equity earnings from unconsolidated affiliate	$	1,307

Property_Plant_and_Equipment

Property, Plant and Equipment	12 Months Ended
	Dec. 31, 2014
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 December 31,
		2014			2013
	Land	$	49,615		$	51,175
	Buildings and site improvements		36,298			34,660
	Tanks and trim		91,463			92,337
	Machinery and equipment		32,815			32,819
	Office furniture and equipment		2,348			2,334
	Construction in progress		6,175			5,003
			218,714			218,328
	Less:  Accumulated depreciation		(22,828	)		(16,851	)
	Property, plant and equipment, net	$	195,886		$	201,477
	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 is reflected in “Long-lived asset impairment” in the accompanying consolidated statement of operations and comprehensive income.

Intangible_Assets

Intangible Assets	12 Months Ended
	Dec. 31, 2014
Goodwill And Intangible Assets Disclosure [Abstract]
Intangible Assets	Note 6—Intangible Assets
	The Partnership’s intangible assets consisted of (in thousands):
		Estimated
		Useful Lives	As of December 31,
		in Years	2014			2013
	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			(12,237	)		(7,119	)
	Intangible assets, net		$	33,189		$	38,307
	The estimated future amortization expense is approximately $4.3 million in 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	12 Months Ended
	Dec. 31, 2014
Debt Disclosure [Abstract]
Debt	Note 7—Debt
	Credit Facility
	In January 2012, the Partnership entered into a $40.0 million credit facility (the “Terminal Credit Facility”). On November 12, 2013, concurrent with the closing of the IPO, the Partnership amended and restated the Terminal Credit Facility (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 (see “Note 2—Summary of Significant Accounting Policies—Other Assets” for discussion regarding deferred financing costs). As of December 31, 2014, the Partnership had borrowings of $111.1 million under the Credit Facility at an interest rate of 2.92%. Based on the restrictions under the total leverage ratio covenant, as of December 31, 2014, the Partnership had $23.4 million of available capacity under the Credit Facility.
	The Credit Facility is available to refinance existing indebtedness, 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 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 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 on November 12, 2018.
	Loans under the Credit Facility bear interest at a floating rate based upon the 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 London Interbank Offer Rate (“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 0.50% per annum. The unused portion of the Credit Facility is subject to a commitment fee calculated based upon the Partnership’s 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 December 31, 2014 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 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 permitted acquisition or issuance of over $200 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 facility are unconditionally guaranteed by the Partnership and each of the Partnership’s existing 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 (the “First Amendment”) to the Credit Facility agreement. The First Amendment principally modified certain provisions of the Credit Facility agreement to allow Arc Terminals Holdings to enter into the Lease Agreement relating to the petroleum products terminals and pipeline infrastructure located in Portland, OR (the “Portland Terminal”).
	Terminal Credit Facility
	The Terminal Credit Facility bore interest based upon LIBOR plus an applicable margin. The applicable margin was based on the leverage ratio as defined by the Terminal Credit Facility agreement, calculated at the beginning of each interest period. At the time of closing, the Partnership borrowed $22.0 million on the Terminal Credit Facility, applying $20.0 million to extinguish the Partnership’s prior revolving line of credit and the balance was used to pay transaction fees and fund operations. The Terminal Credit Facility agreement required the Partnership to maintain a leverage ratio of not more than 3.75 to 1.00, which decreased to 3.50 to 1.00 on or after March 31, 2013 and a minimum fixed charge ratio of not less than 1.25 to 1.00.
	In February 2013, the Partnership amended the Terminal Credit Facility to include a $65.0 million term loan and a $65.0 million revolving line of credit. The amended Terminal Credit Facility had an initial three year term and bore interest based upon LIBOR plus an applicable margin. The applicable margin was based on the leverage ratio as defined in the Terminal Credit Facility agreement, calculated at the beginning of each interest period. At the time of the closing, the Partnership borrowed an additional $55.0 million which was used to satisfy the cash portion of the GCAC Purchase Price and to extinguish the debt acquired as a part of the GCAC Purchase Price. Also in February 2013, the Partnership borrowed an additional $27.0 million to complete the Motiva acquisition. The amended Terminal Credit Facility agreement required the Partnership to maintain an initial leverage ratio of not more than 5.00 to 1.00, which decreased to 4.00 to 1.00 by December 31, 2013 and a minimum fixed charge ratio of not less than 1.25 to 1.00.
	Line of Credit
	In October 2007, the Partnership entered into a revolving line of credit in the amount of $10.0 million. The collateral for the line of credit included the Partnership’s terminal assets. The revolving line of credit had a term of 12 months, with interest calculated monthly at the one month LIBOR plus 2.75%. In addition, there was an interest rate floor of 5.50% and a nonusage fee of 1.0%. The nonusage fee was calculated and payable quarterly and was waived if the average funded balance of any fiscal quarter exceeded a certain threshold. The nonusage fee was included as interest expense in the consolidated financial statements.
	In August 2010, the Partnership amended its existing revolving line of credit to increase the amount available to $20.0 million and extend the maturity to August 1, 2011. In addition, the amendment required the Partnership to maintain a 1:1 ratio of EBITDA to designated expenses, which included mandatory principal payments of indebtedness, interest expense, taxes, distributions in excess of $5.0 million and capital expenditures less capital contributions, gains on the sale of assets and the amount of any new indebtedness.
	In March 2011, the Partnership executed a commitment letter from the lender to extend the term of the revolving line of credit to March 2012 under the same interest rate and nonusage fee terms as previously disclosed.
	This revolving line of credit was extinguished as a part of a new credit facility that the Partnership entered into in January 2012. At the time of extinguishment, the balance outstanding on the revolving line of credit was $20.0 million.

Preferred_Units

Preferred Units	12 Months Ended
	Dec. 31, 2014
Equity [Abstract]
Preferred Units	Note 8—Preferred Units
	In February 2013, the Partnership, as a part of the GCAC Purchase Price (see “Note 3—Acquisitions”), issued 1,500,000 preferred units to GCAC with a value of $30.0 million. The preferred units ranked senior in liquidation preference and distributions to all existing and outstanding common and subordinated units. The preferred units were entitled to 8% annual distributions, paid 45 days following each calendar quarter, assuming the Partnership remained in compliance with all related covenants in the Terminal Credit Facility. If for any reason the Partnership were to be unable to pay the quarterly distributions on time to the preferred unitholders, the distribution amount would have compounded at an 8% annual interest rate until paid. At the time of the IPO the Partnership issued 779 common units and 58,426 subordinated units and made a cash distribution of approximately $29.0 million to GCAC for the contribution of its preferred units in Arc Terminals to the Partnership. Prior to the IPO, the Partnership recorded the preferred units as mezzanine equity in accordance with ASC Topic 480 Distinguishing Liabilities from Equity due to the redeemable nature, at the option of the holders, of the preferred units at a fixed and determinable price based upon certain redemption events which were outside the control of the Partnership. During the year ended December 31, 2013, the Partnership paid $1.8 million in cash distributions to the preferred unitholders. No other amounts have been distributed in the periods presented in the consolidated statements of operations and comprehensive income.

Partners_Capital_and_Distribut

Partners' Capital and Distributions	12 Months Ended
	Dec. 31, 2014
Equity [Abstract]
Partners' Capital and Distributions	Note 9—Partners’ Capital and Distributions
	Initial Public Offering
	On November 6, 2013, Arc Logistics’ common units began trading on the New York Stock Exchange under the symbol “ARCX.” On November 12, 2013, the Partnership closed the IPO by selling 6,000,000 common units representing limited partner interests in us at a price to the public of $19.00 per common unit. On November 18, 2013, the Partnership completed the sale of 786,869 additional common units pursuant to the partial exercise of the underwriters’ over-allotment option at a price to the public of $19.00 per unit.
	In connection with the closing of the IPO and the recapitalization, the following transactions occurred:
	—	Lightfoot contributed all of its limited partner interests in Arc Terminals and all of its limited liability company interests in Arc Terminals GP LLC in exchange for 68,617 common units and 5,146,264 subordinated units in the Partnership;
	—	Center Oil contributed all of its limited partner interests in Arc Terminals in exchange for 11,685 common units and 876,391 subordinated units in the Partnership;
	—	GCAC contributed its preferred units in Arc Terminals in exchange for 779 common units and 58,426 subordinated units in the Partnership and $29.8 million in cash;
	—	Arc Terminals GP LLC and Arc Terminals merged with Arc Terminals GP LLC surviving the merger and then changing its name to Arc Logistics LLC;
	—	The public, through the underwriters, contributed $120.2 million of net proceeds in exchange for the issuance of 6,786,869 common units by the Partnership; and
	—	The General Partner maintained its non-economic general partner interest in the Partnership, and was issued 100.0% of the incentive distribution rights of the Partnership.
	As a result of the recapitalization in connection with the IPO, the number of units outstanding was adjusted on a retroactive basis, which is reflected in the table below:
						Limited Partner			Limited Partner
			Preferred Units			Common Units			Subordinated Units
	Units outstanding at December 31, 2012			-			80,302			6,022,655
	Issuance of preferred units			1,500,000			-			-
	Contribution of preferred units (1)			(1,500,000	)		779			58,426
	Issuance of common units			-			6,786,869			-
	Units outstanding at December 31, 2013			-			6,867,950			6,081,081
	Units outstanding at December 31, 2014			-			6,867,950			6,081,081
	-1	GCAC contributed its preferred units in Arc Terminals in exchange for 779 common units and 58,426 subordinated units in the Partnership and $29.8 million in cash.
	Cash Distributions
	The table below summarizes the quarterly distributions related to the Partnership’s quarterly financial results (in thousands, except per unit data):
	Quarter Ended		Total Quarterly			Total Cash			Date of		Unitholders
			Distribution			Distribution			Distribution		Record Date
			Per Unit
	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
	December 31, 2014 (1)		$	0.2064		$	2,673		18-Feb-14		10-Feb-14
	(1) Initial pro rata cash distribution, prorated for the period from November 13, 2013 to December 31, 2013.
	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 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 of directors of the General Partner 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 Distribution Per Unit Target Amount		Marginal Percentage
			Interest
			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	12 Months Ended
	Dec. 31, 2014
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Disclosure of Compensation Related Costs, Share-based Payments	Note 10—Equity Plans
	2013 Long-Term Incentive Plan
	The Board of Directors of the General Partner (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 and serve as the Committee under the 2013 Plan.  Effective as of March 2015, the Board dissolved the Compensation Committee. On and after such date, the Board shall serve as the Committee under the 2013 Plan (the “Committee”). 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. The Committee also has the ability to grant distribution equivalent rights (“DER”) 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 year ended December 31, 2014, the Partnership recorded approximately $0.4 million of unit-based compensation expense with respect to the Director Grants. As of December 31, 2014, the unrecognized unit-based compensation expense for the Director Grants is approximately $2.2 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 year ended December 31, 2014, the Partnership recorded approximately $2.8 million of unit-based compensation expense with respect to the Employee Equity Grants. As of December 31, 2014, the unrecognized unit-based compensation expense for the Employee Equity Grants was approximately $18.3 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 year ended December 31, 2014, the Partnership recorded less than $0.1 million of unit-based compensation expense with respect to the Employee Liability Grants.  As of December 31, 2014, 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.
	Subject to applicable earning criteria, the DER included in each Director Grant, Employee Equity Grant and Employee Liability Grant 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 consolidated statements of operations and comprehensive income. During the year ended December 31, 2014, the Partnership paid approximately $0.8 million in DERs to phantom unitholders, $0.4 million of which was reflected as a reduction of partners’ capital and $0.3 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 year ended December 31, 2014 was $3.2 million, which was included in the “Selling, general and administrative” line item in the accompanying consolidated statements of operations and comprehensive income. The amount recorded as liabilities in “Other non-current liabilities” in the accompanying consolidated balance sheets as of December 31, 2014 was less than $0.1 million.
	The following table presents phantom units granted pursuant to the 2013 Plan:
		Equity Awards					Liability Awards
		Year Ended					Year Ended
		31-Dec-14					31-Dec-14
		Number			Weighted Avg.		Number		Weighted Avg.
		of Phantom			Grant Date		of Phantom		Grant Date		Fair Value at
		Units			Fair Value		Units		Fair Value		12/31/14
	Balance at December 31, 2013		-		$	-		-	$	-	$	-
	Granted		932,000		$	25.46		7,500	$	25.46	$	17.06
	Vested		-		$	-		-	$	-	$	-
	Forfeited		(3,500	)	$	25.46		-	$	-	$	-
	Balance at December 31, 2014		928,500		$	25.46		7,500	$	25.46	$	17.06

Earnings_Per_Unit

Earnings Per Unit	12 Months Ended
	Dec. 31, 2014
Earnings Per Share [Abstract]
Earnings Per Unit	Note 11—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 year ended December 31, 2014, the only potentially dilutive units outstanding consisted of the phantom units (see “Note 10—Equity Plans”). For the year ended December 31, 2013 the only potentially dilutive units outstanding consisted of GCAC’s preferred units (see “Note 8—Preferred Units”).
	As a result of the recapitalization in connection with the IPO, earnings per unit was adjusted on a retroactive basis, which is reflected in the calculation below (in thousands, except per unit data):
		Years Ended December 31,
		2014		2013		2012
	Net Income	$	1,275	$	12,831	$	5,423
	Less:
	Distribution equivalent rights for unissued units	$	627	$	-	$	-
	Preferred unit distributions	$	-	$	1,770	$	-
	Earnings attributable to preferred units	$	-	$	1,423	$	-
	Net income available to limited partners	$	648	$	9,638	$	5,423
	Numerator for basic earnings per limited partner unit:
	Allocation of net income among limited partner interests:
	Net income allocated to common unitholders	$	343	$	247	$	71
	Net income allocated to subordinated unitholders	$	305	$	9,391	$	5,352
	Net income allocated to limited partners:	$	648	$	9,638	$	5,423
	Denominator for basic earnings per limited partner unit:
	Common units		6,868		1,069		80
	Subordinated units		6,081		6,031		6,023
	Total basic units outstanding		12,949		7,100		6,103
	Earnings per limited partner unit, basic:
	Common units	$	0.05	$	0.23	$	0.89
	Subordinated units	$	0.05	$	1.56	$	0.89
	Numerator for diluted earnings per limited partner unit:
	Allocation of net income among limited partner interests:
	Net income allocated to common unitholders	$	343	$	247	$	71
	Net income allocated to subordinated unitholders	$	305	$	9,391	$	5,352
	Net income allocated to limited partners:	$	648	$	9,638	$	5,423
	Denominator for diluted earnings per limited partner unit:
	Common units		6,868		2,583		80
	Subordinated units		6,081		6,031		6,023
	Total diluted units outstanding		12,949		8,614		6,103
	Earnings per limited partner unit, diluted:
	Common units	$	0.05	$	0.1	$	0.89
	Subordinated units	$	0.05	$	1.56	$	0.89

Segment_Reporting

Segment Reporting	12 Months Ended
	Dec. 31, 2014
Segment Reporting [Abstract]
Segment Reporting	Note 12—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.

Related_Party_Transactions

Related Party Transactions	12 Months Ended
	Dec. 31, 2014
Related Party Transactions [Abstract]
Related Party Transactions	Note 13—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 years ended December 31, 2014, 2013 and 2012 the General Partner incurred expenses of $4.0 million, $2.5 million and $2.6 million, respectively. Such expenses are reimbursable from the Partnership and are reflected in the “Selling, general and administrative—affiliate” line on the accompanying consolidated statements of operations and comprehensive income. These expenses approximate what would be incurred by the Partnership on a stand-alone basis. As of December 31, 2014 and December 31, 2013, the Partnership had a payable of approximately $0.4 million and $0.1 million, respectively, to the General Partner which is reflected as “Due to general partner” in the accompanying 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 a registration statement to register the common units issued to our Sponsor and the common units issuable upon the conversion of the subordinated units upon request of 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.
	Assignment and Equity Purchase Agreement with GE EFS
	In connection with the IPO, the Partnership entered into an assignment and equity purchase agreement with an affiliate of GE EFS that enabled the Partnership to acquire the LNG Interest. Approximately $72.7 million of the proceeds from the IPO were used to acquire the LNG Interest on the closing date of the IPO.
	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. The agreement has a one-year term and comes up for renewal in May 2015.
	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. The agreement has a one-year term and comes up for renewal 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.
	Storage and Throughput Agreements with GCAC
	In February 2013, and in connection with the GCAC Asset Acquisition, the Partnership entered into a storage and throughput agreement (the “GCAC Agreement 1”) with GCAC whereby the Partnership provides storage and throughput services for various petroleum products to GCAC at the acquired storage tanks existing at the time of the GCAC Asset Acquisition, 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 consolidated statements of operations and comprehensive income are as follows (in thousands):
		For the Year Ended December 31,
		2014		2013		2012
	Center Oil	$	7,382	$	7,587	$	9,663
	GCAC		1,848		592		-
	Total	$	9,230	$	8,179	$	9,663
	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 consolidated balance sheets are as follows (in thousands):
		As of December 31,
		2014		2013
	Center Oil	$	594	$	536
	GCAC		306		186
	Total	$	900	$	722
	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 LCP Oregon Holdings LLC (“LCP Oregon”), 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 rents 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 rents also increase each month starting with the month of August 2014 by a factor of 0.00958 of the specified construction costs incurred by 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 December 31, 2014, spending on terminal-related projects totaled approximately $5.6 million. The base rents will increase 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 year ended December 31, 2014, the expense associated with the Lease Agreement was $6.5 million. During the year ended December 31, 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.

Major_Customers

Major Customers	12 Months Ended
	Dec. 31, 2014
Risks And Uncertainties [Abstract]
Major Customers	Note 14—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									% of Receivables
		For the Year Ended December 31,									As of December 31,
		2014			2013			2012			2014			2013
	Chevron U.S.A. Inc.		19	%		3	%		2	%		26	%		7	%
	Center Oil		13	%		16	%		42	%		13	%		10	%
	Total percentages associated with		32	%		19	%		44	%		39	%		17	%
	significant customers

Commitments_and_Contingencies

Commitments and Contingencies	12 Months Ended
	Dec. 31, 2014
Commitments And Contingencies Disclosure [Abstract]
Commitments and Contingencies	Note 15—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 December 31, 2014 and 2013.
	Commitments and contractual obligations
	Future non-cancelable commitments related to certain contractual obligations as of December 31, 2014 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		30,251		6,346		6,511		6,382		10,906		106		-
	Total	$	141,314	$	6,346	$	6,511	$	6,382	$	10,906	$	111,169	$	-
	The schedule above assumes the Partnership will either exercise its Purchase Option or its right to terminate the Lease Agreement.
	During the year ended December 31, 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. For the year ended December 31, 2014, capital calls totaling $11.6 million were issued to all members of Gulf LNG Holdings, for which the Partnership’s pro rata share was approximately $1.2 million. As of December 31, 2014, the Partnership’s pro rata share of the remaining capital commitment was approximately $0.3 million.
	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 December 31, 2014, no additional amounts have been paid or are owed to GCAC.

Quarterly_Financial_Data

Quarterly Financial Data	12 Months Ended
	Dec. 31, 2014
Quarterly Financial Information Disclosure [Abstract]
Quarterly Financial Data	Note 16— Quarterly Financial Data (Unaudited)
	(in thousands, except per unit data)	First			Second		Third		Fourth
		Quarter			Quarter		Quarter		Quarter
	2014:00:00
	Revenues	$	13,213		$	14,727	$	13,690	$	13,275
	Operating income	$	384		$	1,185	$	39	$	(6,481	)
	Net income (loss)	$	1,861		$	2,742	$	1,636	$	(4,964	)
	Net income (loss) per limited partner unit:
	Common units (basic and diluted)	$	0.14		$	0.21	$	0.11	$	(0.40	)
	Subordinated units (basic and diluted)	$	0.14		$	0.21	$	0.11	$	(0.40	)
	Weighted average number of limited partners units outstanding:
	Common units (basic and diluted)		6,868			6,868		6,868		6,868
	Subordinated units (basic and diluted)		6,081			6,081		6,081		6,081
	(in thousands, except per unit data)	First			Second		Third		Fourth
		Quarter			Quarter		Quarter		Quarter
	2013:00:00
	Revenues	$	9,608		$	13,096	$	12,625	$	12,512
	Operating (loss) income	$	(17	)	$	2,837	$	2,733	$	2,804
	Net income	$	9,857		$	1,338	$	1,274	$	361
	Less: Net income attributable to preferred units	$	347		$	600	$	600	$	223
	Net income attributable to partners' capital	$	9,511		$	738	$	674	$	138
	Net income per limited partner unit, basic:
	Common units	$	1.37		$	0.1	$	0.09	$	0.03
	Subordinated units	$	1.37		$	0.1	$	0.09	$	0
	Net income per limited partner unit, diluted:
	Common units	$	1.37		$	0.1	$	0.09	$	0.01
	Subordinated units	$	1.37		$	0.1	$	0.09	$	0
	Weighted average number of limited partners units outstanding, basic:
	Common units		80			80		80		4,035
	Subordinated units		6,023			6,023		6,023		6,058
	Weighted average number of limited partners units outstanding, diluted:
	Common units		80			80		80		10,093
	Subordinated units		6,023			6,023		6,023		-

Subsequent_Events

Subsequent Events	12 Months Ended
	Dec. 31, 2014
Subsequent Events [Abstract]
Subsequent Events	Note 17—Subsequent Events
	Cash Distribution
	In January 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 October 1, 2014 through December 31, 2014. This distribution was paid on February 17, 2015 to unitholders of record on February 9, 2015.
	JBBR Acquisition
	JBBR Purchase Agreement
	In February 2015, Arc Terminals Joliet Holdings LLC, a Delaware limited liability company (“Buyer”) 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 (the “Seller”), for a base cash purchase price of $216 million, all of the issued and outstanding membership interests in Joliet Bulk, Barge & Rail LLC (“JBBR”; and such acquisition, the “JBBR Acquisition”), which among other things owns a terminal and a 4-mile crude oil pipeline that are in the final stages of construction in Joliet, Illinois (the “Facility”). 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 (the “Closing”), 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.
	Equity Commitment Letters
	In February 2015, each of the Partnership and Aircraft Services Corporation (the “GE Equity Provider”), an affiliate of GE EFS, entered into separate equity commitment letters with Buyer under which the Partnership and GE Equity Provider agreed to contribute to Buyer sixty percent (60%) and forty percent (40%), respectively, of the JBBR Purchase Price to enable the Buyer to consummate the acquisition of JBBR. The obligations of the Partnership and GE Equity Provider to make such funding available to the Buyer at the Closing are subject to customary funding conditions, including the satisfaction (or waiver by Buyer) of all conditions to Buyer’s obligation to consummate the JBBR Acquisition pursuant to the JBBR Purchase Agreement, as more fully set forth in the respective equity commitment letters provided by the Partnership and GE Equity Provider. Following the Closing, the Partnership and GE EFS will indirectly own sixty percent (60%) and forty percent (40%), respectively, of the Buyer.
	Interim Investors Agreement
	In February 2015, the Partnership and EFS-S LLC (and 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 Buyer and the relationship between the Partnership and GE JV Partner as it relates to Buyer until the earlier of the Closing or 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 Buyer concurrently with the Closing on terms consistent with terms set forth in the Interim Investors Agreement.
	Material Relationships Relating to Interim Investors Agreement
	GE EFS owns, indirectly, interests in Lightfoot. Lightfoot has a significant interest in the Partnership through its ownership of a 42.9% 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 of directors of the General Partner.
	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 (the “Common Unit Purchase Price”) in a private placement (the “PIPE Transaction”). The Common Unit Purchase Price will be reduced by the Partnership’s first quarter 2015 distribution in respect of its common units if the closing of the PIPE Transaction is after the record date for such distribution. 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 (the “Partnership Equity Commitment”) under the Partnership Equity Commitment Letter. 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 shall pay to each PIPE Purchaser a commitment fee of 1% of such PIPE Purchaser’s commitment amount under the PIPE Purchase Agreement. 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 under the PIPE Purchase Agreement 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 of Directors of the general partner of the Partnership 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.
	Material Relationships Relating to PIPE Transaction
	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 Lightfoot. Eric Scheyer, the Head of the Energy Group of Magnetar Financial LLC, also serves on the board of directors of the General Partner.
	Debt Financing
	In February 2015, the Partnership’s operating subsidiary, Arc Terminals Holdings, entered into a commitment letter with SunTrust Bank and SunTrust Robinson Humphrey, Inc. (together, “ SunTrust ” and such letter, the “Debt Commitment Letter”) that (i) sets forth the terms and conditions of an incremental senior secured credit facility (the “Incremental Facility”) consisting of an increase to the revolving Credit Facility set forth in the Second Amended and Restated Revolving Credit Agreement, dated as of November 12, 2013 (as amended, the “ Existing Credit Agreement ”), in an amount such that the aggregate amount of all outstanding loans and commitments under the Existing Credit Agreement will not exceed $275 million and the effectiveness of which remains subject to the receipt of consents from the necessary lenders under the Existing Credit Agreement and (ii) pursuant to which SunTrust agreed to provide 100% of a backstop senior secured credit facility of up to $275 million (the “ Backstop Commitment ” and, together with the Incremental Facility, the “Debt Financing”) in order to refinance the Existing Credit Agreement in the event that consents are not received from the necessary lenders to approve the Incremental Facility.
	Long-Term Incentive Plan
	In March 2015, the Board approved the grant of approximately 45,668 additional phantom units pursuant to the 2013 Plan to certain employees, consultants and a non-employee director of the Partnership Entities.  Each grant will have time based vesting, will be settled in common units and include a DER.

Summary_of_Significant_Account1

Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2014
Accounting Policies [Abstract]
Basis of Presentation	Basis of Presentation
	The accompanying consolidated financial statements were prepared in accordance with GAAP and under the rules and regulations of the SEC. The accompanying consolidated financial statements include the accounts of the Partnership and its wholly owned subsidiaries. All intercompany accounts and transactions have been eliminated in consolidation.
	The Partnership has disclosed consolidated figures of the Partnership as if the Partnership had operated since the inception of Arc Terminals. The contribution of Arc Terminals to Arc Logistics in connection with the IPO was not considered a business combination accounted for under the purchase method as it was a transfer of assets under common control and, accordingly, balances have been transferred at their historical cost. The combined financial statements for the periods prior to the contribution on November 12, 2013 have been prepared using Arc Terminals’ historical basis in the assets and liabilities, and include all revenues, costs, assets and liabilities attributed to Arc Terminals.
	During the first quarter of 2014, the Partnership identified a classification error in the Consolidated Statement of Cash Flows for the year ended December 31, 2013 associated with the distributions received from an unconsolidated affiliate for which a portion was incorrectly classified within net cash used in investing activities. The misclassification resulted in an understatement of “net cash used in investing activities” and “net cash provided by operating activities” of approximately $1.3 million. The misclassification had no impact on the Consolidated Balance Sheet or on the Consolidated Statement of Operations nor did it affect the net increase in cash and cash equivalents on the Consolidated Statement of Cash Flows as of or for the period ended December 31, 2013.
	The Partnership evaluated the effect of the misclassification on its previously issued financial statements for the year ended December 31, 2013 and concluded the impact was not material. The Partnership recognized the impact of this misclassification in this Annual Report on Form 10-K by increasing cash flow used in investing activities and cash flows provided by operating activities by $1.3 million for the year ended December 31, 2013 as compared to what was previously reported in the 2013 Form 10-K.
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.
Cash and Cash Equivalents	Cash and Cash Equivalents
	The Partnership includes demand deposits with banks and all highly liquid investments with original maturities of three months or less in cash and cash equivalents. These balances are valued at cost, which approximates fair value.
Trade Accounts Receivable	Trade Accounts Receivable
	Trade accounts receivable are recorded at the invoiced amount and do not bear interest. The Partnership reserves for specific trade accounts receivable when it is probable that all or a part of an outstanding balance will not be collected. The Partnership regularly reviews collectability and establishes or adjusts the allowance as necessary using the specific identification method. Account balances are charged off against the allowance after all means of collection have been exhausted and the potential for recovery is considered remote. There were no reserves for uncollectible amounts as of December 31, 2014 and 2013. During the year ended December 31, 2013, the Partnership wrote off less than $0.1 million of uncollectible receivables. No other amounts have been deemed uncollectible in the periods presented in the consolidated statements of operations and comprehensive income.
Inventories	Inventories
	Inventories consist of additives which are sold to customers and mixed with the various customer-owned liquid products stored in the Partnership’s terminals. Inventories are stated at the lower of cost or estimated net realizable value. Inventory costs are determined using the first-in, first-out method.
Other Current Assets	Other Current Assets
	Other current assets consist primarily of prepaid expenses and deposits.
Property, Plant and Equipment	Property, Plant and Equipment
	Property, plant and equipment is recorded at cost, less accumulated depreciation. The Partnership owns a 50% undivided interest in the property, plant and equipment at two terminal locations. At the time of acquisition, these assets were recorded at 50% of the aggregate fair value of the related property, plant and equipment. Expenditures for routine maintenance and repairs are charged to expense as incurred. Major improvements or expenditures that extend the useful life or productive capacity of assets are capitalized. Depreciation is recorded over the estimated useful lives of the applicable assets, using the straight-line method. The estimated useful lives are as follows:
	Building and site improvements			1–40 years
	Tanks and trim			1–40 years
	Machinery and equipment			1–40 years
	Office furniture and equipment			1–15 years
	Capitalized costs incurred by the Partnership during the year for major improvements and capital projects that are not completed as of year-end are recorded as construction in progress. Construction in progress is not depreciated until the related assets or improvements are ready for intended use. Additionally, the Partnership capitalizes interest costs as a part of the historical cost of constructing certain assets and includes such interest in the property, plant and equipment line on the balance sheet. Capitalized interest for the years ended December 31, 2014 and 2013 was $0.2 million and $0.4 million, respectively.
Intangible Assets	Intangible Assets
	Intangible assets primarily consist of customer relationships, acquired contracts and a covenant not to compete which are amortized on a straight-line basis over the expected life of each intangible asset.
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 years ended December 31, 2014, 2013 and 2012 except as discussed in “Note 5—Property, Plant and Equipment”.
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. Goodwill impairment is determined using a two-step process. The first step of the goodwill impairment test is used to identify potential impairment by comparing the fair value of a reporting unit with its carrying amount, including goodwill. If the carrying amount of a reporting unit exceeds its fair value, the second step of the goodwill impairment test is performed. The second step compares the implied fair value of the reporting unit’s goodwill with the carrying amount of that goodwill. If the carrying amount of the reporting unit’s goodwill exceeds the implied fair value of that goodwill, an impairment loss is recognized in an amount equal to that excess. The implied fair value of goodwill is determined in the same manner as the amount of goodwill recognized in a business combination. The Partnership determines the fair value of its single reporting unit by blending two valuation approaches: the income approach and a market value approach. The Partnership determined at December 31, 2014, there were no impairment charges and no event indicating an impairment has occurred.
	No impairments were recorded against goodwill through December 31, 2014 and 2013.
		As of December 31,
		2014			2013
	Beginning Balance	$	15,162		$	6,730
	Goodwill acquired		-			8,432
	Impairment		-			-
	Ending Balance	$	15,162		$	15,162
Other Assets	Other Assets
	Other assets consist primarily of debt issuance costs related to the Credit Facility amendment entered into in November 2013 (see “Note 7—Debt”). Debt issuance costs are capitalized and amortized over the term of the related debt using straight line amortization, which approximates the effective interest rate method. As of December 31, 2014, these costs were approximately $1.5 million.
Investment in Unconsolidated Affiliate	Investment in Unconsolidated Affiliate
	In connection with the IPO, the Partnership purchased the LNG Interest from an affiliate of GE EFS for approximately $72.7 million. The Partnership accounts for the LNG Interest using the equity method of accounting.
Deferred Rent	Deferred Rent
	The Lease Agreement (as defined in “Note 13—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 consolidated balance sheets at December 31, 2014.
Revenue Recognition	Revenue Recognition
	Revenues from leased tank storage and delivery services are recognized as the services are performed. 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.
Income Taxes	Income Taxes
	Taxable income or loss of the Partnership generally is required to be reported on the income tax returns of the limited partners in accordance with the terms of the partnership agreement. Accordingly, no provision has been made in the accompanying consolidated financial statements for the limited partners’ federal income taxes. There are certain entity level state income taxes that are incurred at the Partnership level and have been recorded during the years ended December 31, 2014, 2013 and 2012.
	Tax returns for the years ended December 31, 2014, 2013, 2012, 2011 and 2010 are open to IRS and state audits. The Partnership is not aware of any uncertain tax positions as of December 31, 2014 and 2013.
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 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). The carrying amount of the Terminal Credit Facility as well as the Partnership’s Credit Facility approximated fair value due to its short-term nature and market rate of interest (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 10—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 and preferred 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.”
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.  This guidance will be effective for the Partnership beginning in the first quarter of 2017.
	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.

Summary_of_Significant_Account2

Summary of Significant Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2014
Accounting Policies [Abstract]
Summary of Estimated Useful Lives of Property, Plant and Equipment	The estimated useful lives are as follows:
	Building and site improvements			1–40 years
	Tanks and trim			1–40 years
	Machinery and equipment			1–40 years
	Office furniture and equipment			1–15 years
Schedule of Goodwill	No impairments were recorded against goodwill through December 31, 2014 and 2013.
		As of December 31,
		2014			2013
	Beginning Balance	$	15,162		$	6,730
	Goodwill acquired		-			8,432
	Impairment		-			-
	Ending Balance	$	15,162		$	15,162

Acquisitions_Tables

Acquisitions (Tables)	12 Months Ended
	Dec. 31, 2014
Pro Forma Financial Results
	The following unaudited pro forma financial results for the years ended December 31, 2013 and 2012 are presented for comparative purposes only and assume the GCAC acquisition had occurred on January 1, 2012. The effects of the GCAC Asset Acquisition are included in the accompanying consolidated statement of operations and comprehensive income for the year ended December 31, 2014. The unaudited pro forma results reflect certain adjustments to the acquisition, such as increased depreciation and amortization expense on the fair value of the assets acquired. The unaudited pro forma financial results may not be indicative of the results that would have occurred had the acquisition been completed at the beginning of the periods presented, nor are they indicative of future results of operations (in thousands, except per unit amounts):
			Year Ended
			December 31,
			2013		2012
			(Unaudited proforma)
	Total revenues		$	49,442	$	34,469
	Operating income			11,822		5,627
	Net Income		$	15,759	$	2,847
	Less: Net income attributable to preferred units		$	2,023	$	2,400
	Net income attributable to partners' capital		$	13,736	$	447
	Earnings per unit - Basic:
	Common and Subordinated		$	1.92	$	0.07
	Earnings per unit - Diluted:
	Common and Subordinated		$	1.86	$	0.07
Gulf Coast Asphalt Company, L.L.C. [Member]
Summary of Consideration Paid and Amounts of Assets Acquired	The following table summarizes the consideration paid and the amounts of assets acquired at the acquisition date (in thousands):
	Consideration:
	Cash paid to seller	$	25,000
	Debt assumed		30,000
	Preferred units issued		30,000
	Total consideration	$	85,000
	Allocation of purchase price:
	Property and equipment	$	39,242
	Intangible assets		37,326
	Goodwill		8,432
	Net assets acquired	$	85,000
Motiva Enterprises LLC [Member]
Summary of Consideration Paid and Amounts of Assets Acquired	The following table summarizes the consideration paid and the amounts of assets acquired at the acquisition date (in thousands):
	Consideration:
	Cash paid to seller	$	27,000
	Allocation of purchase price:
	Property and equipment	$	36,749
	Inventory		19
	Intangible assets		2,009
	Bargain purchase gain		(11,777	)
	Net assets acquired	$	27,000

Investment_in_Unconsolidated_A1

Investment in Unconsolidated Affiliate (Tables)	12 Months Ended
	Dec. 31, 2014
Schedule of Investment in Unconsolidated Affiliate	“Investment in unconsolidated affiliate” consisted of the LNG Interest and its balances as of December 31, 2014 and, 2013 are represented below (in thousands):
	Balance at December 31, 2012	$	-
	Investment in Gulf LNG Holdings, LLC		72,739
	Equity earnings		1,307
	Distributions		(2,451	)
	Amortization of premium		(41	)
	Other comprehensive income		492
	Balance at December 31, 2013	$	72,046
	Equity earnings		9,895
	Contributions		1,197
	Distributions		(9,827	)
	Amortization of premium		(309	)
	Other comprehensive income		(144	)
	Balance at December 31, 2014	$	72,858
Schedule of Estimated Aggregate Amortization of Premium	The estimated aggregate amortization of this premium for its remaining useful life from December 31, 2014 is as follows (in thousands):
		Total
	2015	$	309
	2016		309
	2017		309
	2018		309
	2019		309
	Thereafter		6,753
		$	8,298
Schedule of Partners Equity Earnings in LNG Interest	For the year ended December 31, 2013, the Partnership calculated its equity earnings in the LNG Interest as shown in the table below (in thousands):
	Gulf LNG Holdings net income for the year ended December 31, 2013	$	94,895
	Percentage of Net Income attributable to the Partnership		13	%
	from November 12, 2013 through December 31, 2013
	Net Income attributable to the Partnership	$	12,689
	from November 12, 2013 through December 31, 2013
	Percentage of ownership in Gulf LNG Holdings		10.3	%
	Equity earnings from unconsolidated affiliate	$	1,307
Gulf LNG Holdings [Member]
Schedule of Investment in Unconsolidated Affiliate	Summarized financial information for Gulf LNG Holdings is reported below (in thousands):
		As of December 31,
		2014			2013
	Balance sheets
	Current assets	$	12,537		$	8,694
	Noncurrent assets		926,980			952,630
	Total assets	$	939,517		$	961,324
	Current liabilities	$	85,818		$	81,173
	Long-term liabilities		733,401			773,115
	Member’s equity		120,298			107,036
	Total liabilities and member’s equity	$	939,517		$	961,324
		Year Ended December 31,
		2014			2013
	Income statements
	Revenues	$	186,243		$	186,090
	Total operating costs and expenses		56,743			56,146
	Operating income		129,500			129,944
	Net income	$	96,062		$	94,895

Property_Plant_and_Equipment_T

Property, Plant and Equipment (Tables)	12 Months Ended
	Dec. 31, 2014
Property Plant And Equipment [Abstract]
Schedule of Property, Plant and Equipment	The Partnership’s property, plant and equipment consisted of (in thousands):
		As of December 31,
		2014			2013
	Land	$	49,615		$	51,175
	Buildings and site improvements		36,298			34,660
	Tanks and trim		91,463			92,337
	Machinery and equipment		32,815			32,819
	Office furniture and equipment		2,348			2,334
	Construction in progress		6,175			5,003
			218,714			218,328
	Less:  Accumulated depreciation		(22,828	)		(16,851	)
	Property, plant and equipment, net	$	195,886		$	201,477

Intangible_Assets_Tables

Intangible Assets (Tables)	12 Months Ended
	Dec. 31, 2014
Goodwill And Intangible Assets Disclosure [Abstract]
Summary of Partnership's Intangible Assets	The Partnership’s intangible assets consisted of (in thousands):
		Estimated
		Useful Lives	As of December 31,
		in Years	2014			2013
	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			(12,237	)		(7,119	)
	Intangible assets, net		$	33,189		$	38,307

Partners_Capital_and_Distribut1

Partners' Capital and Distributions (Tables)	12 Months Ended
	Dec. 31, 2014
Equity [Abstract]
Schedule of Outstanding Capital Units	As a result of the recapitalization in connection with the IPO, the number of units outstanding was adjusted on a retroactive basis, which is reflected in the table below:
						Limited Partner			Limited Partner
			Preferred Units			Common Units			Subordinated Units
	Units outstanding at December 31, 2012			-			80,302			6,022,655
	Issuance of preferred units			1,500,000			-			-
	Contribution of preferred units (1)			(1,500,000	)		779			58,426
	Issuance of common units			-			6,786,869			-
	Units outstanding at December 31, 2013			-			6,867,950			6,081,081
	Units outstanding at December 31, 2014			-			6,867,950			6,081,081
	-1	GCAC contributed its preferred units in Arc Terminals in exchange for 779 common units and 58,426 subordinated units in the Partnership and $29.8 million in cash.
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):
	Quarter Ended		Total Quarterly			Total Cash			Date of		Unitholders
			Distribution			Distribution			Distribution		Record Date
			Per Unit
	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
	December 31, 2014 (1)		$	0.2064		$	2,673		18-Feb-14		10-Feb-14
	(1) Initial pro rata cash distribution, prorated for the period from November 13, 2013 to December 31, 2013.
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 Distribution Per Unit Target Amount		Marginal Percentage
			Interest
			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)	12 Months Ended
	Dec. 31, 2014
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
		Year Ended					Year Ended
		31-Dec-14					31-Dec-14
		Number			Weighted Avg.		Number		Weighted Avg.
		of Phantom			Grant Date		of Phantom		Grant Date		Fair Value at
		Units			Fair Value		Units		Fair Value		12/31/14
	Balance at December 31, 2013		-		$	-		-	$	-	$	-
	Granted		932,000		$	25.46		7,500	$	25.46	$	17.06
	Vested		-		$	-		-	$	-	$	-
	Forfeited		(3,500	)	$	25.46		-	$	-	$	-
	Balance at December 31, 2014		928,500		$	25.46		7,500	$	25.46	$	17.06

Earnings_Per_Unit_Tables

Earnings Per Unit (Tables)	12 Months Ended
	Dec. 31, 2014
Earnings Per Share [Abstract]
Schedule of Earnings Per Unit	As a result of the recapitalization in connection with the IPO, earnings per unit was adjusted on a retroactive basis, which is reflected in the calculation below (in thousands, except per unit data):
		Years Ended December 31,
		2014		2013		2012
	Net Income	$	1,275	$	12,831	$	5,423
	Less:
	Distribution equivalent rights for unissued units	$	627	$	-	$	-
	Preferred unit distributions	$	-	$	1,770	$	-
	Earnings attributable to preferred units	$	-	$	1,423	$	-
	Net income available to limited partners	$	648	$	9,638	$	5,423
	Numerator for basic earnings per limited partner unit:
	Allocation of net income among limited partner interests:
	Net income allocated to common unitholders	$	343	$	247	$	71
	Net income allocated to subordinated unitholders	$	305	$	9,391	$	5,352
	Net income allocated to limited partners:	$	648	$	9,638	$	5,423
	Denominator for basic earnings per limited partner unit:
	Common units		6,868		1,069		80
	Subordinated units		6,081		6,031		6,023
	Total basic units outstanding		12,949		7,100		6,103
	Earnings per limited partner unit, basic:
	Common units	$	0.05	$	0.23	$	0.89
	Subordinated units	$	0.05	$	1.56	$	0.89
	Numerator for diluted earnings per limited partner unit:
	Allocation of net income among limited partner interests:
	Net income allocated to common unitholders	$	343	$	247	$	71
	Net income allocated to subordinated unitholders	$	305	$	9,391	$	5,352
	Net income allocated to limited partners:	$	648	$	9,638	$	5,423
	Denominator for diluted earnings per limited partner unit:
	Common units		6,868		2,583		80
	Subordinated units		6,081		6,031		6,023
	Total diluted units outstanding		12,949		8,614		6,103
	Earnings per limited partner unit, diluted:
	Common units	$	0.05	$	0.1	$	0.89
	Subordinated units	$	0.05	$	1.56	$	0.89

Related_Party_Transactions_Tab

Related Party Transactions (Tables)	12 Months Ended
	Dec. 31, 2014
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 consolidated statements of operations and comprehensive income are as follows (in thousands):
		For the Year Ended December 31,
		2014		2013		2012
	Center Oil	$	7,382	$	7,587	$	9,663
	GCAC		1,848		592		-
	Total	$	9,230	$	8,179	$	9,663
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 consolidated balance sheets are as follows (in thousands):
		As of December 31,
		2014		2013
	Center Oil	$	594	$	536
	GCAC		306		186
	Total	$	900	$	722

Major_Customers_Tables

Major Customers (Tables)	12 Months Ended
	Dec. 31, 2014
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									% of Receivables
		For the Year Ended December 31,									As of December 31,
		2014			2013			2012			2014			2013
	Chevron U.S.A. Inc.		19	%		3	%		2	%		26	%		7	%
	Center Oil		13	%		16	%		42	%		13	%		10	%
	Total percentages associated with		32	%		19	%		44	%		39	%		17	%
	significant customers

Commitments_and_Contingencies_

Commitments and Contingencies (Tables)	12 Months Ended
	Dec. 31, 2014
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 December 31, 2014 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		30,251		6,346		6,511		6,382		10,906		106		-
	Total	$	141,314	$	6,346	$	6,511	$	6,382	$	10,906	$	111,169	$	-

Quarterly_Financial_Data_Table

Quarterly Financial Data (Tables)	12 Months Ended
	Dec. 31, 2014
Quarterly Financial Information Disclosure [Abstract]
Schedule of Quarterly Financial Data
	(in thousands, except per unit data)	First			Second		Third		Fourth
		Quarter			Quarter		Quarter		Quarter
	2014:00:00
	Revenues	$	13,213		$	14,727	$	13,690	$	13,275
	Operating income	$	384		$	1,185	$	39	$	(6,481	)
	Net income (loss)	$	1,861		$	2,742	$	1,636	$	(4,964	)
	Net income (loss) per limited partner unit:
	Common units (basic and diluted)	$	0.14		$	0.21	$	0.11	$	(0.40	)
	Subordinated units (basic and diluted)	$	0.14		$	0.21	$	0.11	$	(0.40	)
	Weighted average number of limited partners units outstanding:
	Common units (basic and diluted)		6,868			6,868		6,868		6,868
	Subordinated units (basic and diluted)		6,081			6,081		6,081		6,081
	(in thousands, except per unit data)	First			Second		Third		Fourth
		Quarter			Quarter		Quarter		Quarter
	2013:00:00
	Revenues	$	9,608		$	13,096	$	12,625	$	12,512
	Operating (loss) income	$	(17	)	$	2,837	$	2,733	$	2,804
	Net income	$	9,857		$	1,338	$	1,274	$	361
	Less: Net income attributable to preferred units	$	347		$	600	$	600	$	223
	Net income attributable to partners' capital	$	9,511		$	738	$	674	$	138
	Net income per limited partner unit, basic:
	Common units	$	1.37		$	0.1	$	0.09	$	0.03
	Subordinated units	$	1.37		$	0.1	$	0.09	$	0
	Net income per limited partner unit, diluted:
	Common units	$	1.37		$	0.1	$	0.09	$	0.01
	Subordinated units	$	1.37		$	0.1	$	0.09	$	0
	Weighted average number of limited partners units outstanding, basic:
	Common units		80			80		80		4,035
	Subordinated units		6,023			6,023		6,023		6,058
	Weighted average number of limited partners units outstanding, diluted:
	Common units		80			80		80		10,093
	Subordinated units		6,023			6,023		6,023		-

Organization_and_Presentation_

Organization and Presentation - Additional Information (Detail) (USD $)	1 Months Ended	12 Months Ended		0 Months Ended
	Nov. 30, 2013	Dec. 31, 2014	Dec. 31, 2013	Nov. 18, 2013	Nov. 12, 2013
Organization [Line Items]
Net proceeds from Offering	$120,200,000
Purchase of LNG Interest from an affiliate		1,197,000	72,740,000
Reduction in outstanding amount of credit facility	6,000,000
Lightfoot Capital Partners LP [Member]
Organization [Line Items]
Intercompany payables	6,600,000
Initial Public Offering [Member] | Limited Partners [Member]
Organization [Line Items]
Common units issued in initial public offering	6,786,869			786,869	6,000,000
Common units issued, per unit	$19			$19	$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] | Initial Public Offering [Member]
Organization [Line Items]
Limited liability company interest					10.30%
Gulf LNG Holdings Group, LLC Acquisition [Member]
Organization [Line Items]
Purchase of LNG Interest from an affiliate	72,740,000				72,740,000
Gulf Coast Asphalt Company, L.L.C. [Member]
Organization [Line Items]
Cash distribution	$29,800,000

Summary_of_Significant_Account3

Summary of Significant Accounting Policies - Additional Information (Detail) (USD $)	3 Months Ended	12 Months Ended			0 Months Ended	1 Months Ended
	Mar. 31, 2014	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Nov. 12, 2013	Nov. 30, 2013
		Location
Schedule Of Accounting Policies [Line Items]
Understatement of net cash used in investing and operating activities due to misclassification	$1,300,000		$1,300,000
Cash and cash equivalents original maturities		three months or less
Uncollectible reserves		0	0
Number of terminal locations		2
Impairment charges		0	0	0
Goodwill impairments		0	0
Capitalized debt issuance cost		1,500,000
Purchase of LNG Interest from an affiliate		1,197,000	72,740,000
Gulf LNG Holdings Group, LLC Acquisition [Member]
Schedule Of Accounting Policies [Line Items]
Purchase of LNG Interest from an affiliate					72,740,000	72,740,000
Property, Plant and Equipment, Net [Member]
Schedule Of Accounting Policies [Line Items]
Undivided ownership interest on assets		50.00%
Percentage of aggregate fair value of assets at the time of acquisition		50.00%
Maximum [Member]
Schedule Of Accounting Policies [Line Items]
Partnership wrote off uncollectible receivables			100,000
Maximum [Member] | Property, Plant and Equipment, Net [Member]
Schedule Of Accounting Policies [Line Items]
Capitalized interest		$200,000	$400,000

Summary_of_Significant_Account4

Summary of Significant Accounting Policies - Summary of Estimated Useful Lives of Property, Plant and Equipment (Detail)	12 Months Ended
	Dec. 31, 2014
Minimum [Member] | Building and Site Improvements [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, estimated useful life	1 year
Minimum [Member] | Tanks and Trim [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, estimated useful life	1 year
Minimum [Member] | Machinery and Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, estimated useful life	1 year
Minimum [Member] | Office Furniture and Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, estimated useful life	1 year
Maximum [Member] | Building and Site Improvements [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, estimated useful life	40 years
Maximum [Member] | Tanks and Trim [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, estimated useful life	40 years
Maximum [Member] | Machinery and Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, estimated useful life	40 years
Maximum [Member] | Office Furniture and Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, estimated useful life	15 years

Summary_of_Significant_Account5

Summary of Significant Accounting Policies - Schedule of Goodwill (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Goodwill And Intangible Assets Disclosure [Abstract]
Beginning Balance	$15,162	$6,730
Goodwill acquired		8,432
Impairment	0	0
Ending Balance	$15,162	$15,162

Acquisitions_Additional_Inform

Acquisitions - Additional Information (Detail) (USD $)	12 Months Ended	1 Months Ended	11 Months Ended	12 Months Ended
	Dec. 31, 2013	Feb. 28, 2013	Dec. 31, 2013	Dec. 31, 2014	Dec. 31, 2012
		Customer
Business Acquisition [Line Items]
Preferred units issued	$30,000,000
Goodwill	15,162,000		15,162,000	15,162,000	6,730,000
Bargain purchase gain	11,777,000
Gulf Coast Asphalt Company, L.L.C. [Member]
Business Acquisition [Line Items]
Total consideration		85,000,000
Cash paid to seller		25,000,000
Debt assumed		30,000,000
Preferred units issued		30,000,000
Identifiable assets acquired, fair value		76,600,000
Goodwill		8,432,000
Transaction costs		1,900,000
Earnout payments, high	5,000,000	5,000,000	5,000,000
Earnout payments				0
Earnout payments condition				Throughput activity of one customer through December 31, 2016.
Business combination, contingent consideration, number of customers considered		1
Total revenue			18,100,000
Operating income			9,700,000
Motiva Enterprises LLC [Member]
Business Acquisition [Line Items]
Cash paid to seller		27,000,000
Identifiable assets acquired, fair value		38,800,000
Transaction costs		1,500,000
Total revenue			6,000,000
Operating income			3,500,000
Bargain purchase gain		$11,777,000

Acquisitions_Summary_of_Consid

Acquisitions - Summary of Consideration Paid and Amounts of Assets Acquired (Detail) (USD $)	12 Months Ended	1 Months Ended
	Dec. 31, 2013	Feb. 28, 2013	Dec. 31, 2014	Dec. 31, 2012
Consideration:
Preferred units issued	$30,000,000
Allocation of purchase price:
Goodwill	15,162,000		15,162,000	6,730,000
Gain on bargain purchase of business	-11,777,000
Gulf Coast Asphalt Company, L.L.C. [Member]
Consideration:
Cash paid to seller		25,000,000
Debt assumed		30,000,000
Preferred units issued		30,000,000
Total consideration		85,000,000
Allocation of purchase price:
Property and equipment		39,242,000
Intangible assets		37,326,000
Goodwill		8,432,000
Net assets acquired		85,000,000
Motiva Enterprises LLC [Member]
Consideration:
Cash paid to seller		27,000,000
Allocation of purchase price:
Property and equipment		36,749,000
Inventory		19,000
Intangible assets		2,009,000
Gain on bargain purchase of business		-11,777,000
Net assets acquired		$27,000,000

Acquisitions_Pro_Forma_Financi

Acquisitions - Pro Forma Financial Results (Detail) (USD $)	12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Business Combinations [Abstract]
Total revenues	$49,442	$34,469
Operating income	11,822	5,627
Net Income	15,759	2,847
Less: Net income attributable to preferred units	2,023	2,400
Net income attributable to partners' capital	$13,736	$447
Earnings per unit - Basic:
Common and Subordinated	$1.92	$0.07
Earnings per unit - Diluted:
Common and Subordinated	$1.86	$0.07

Investment_in_Unconsolidated_A2

Investment in Unconsolidated Affiliate - Schedule of Investments in Unconsolidated Affiliate (Detail) (USD $)	12 Months Ended		0 Months Ended	1 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Nov. 12, 2013	Nov. 30, 2013
Schedule Of Equity Method Investments [Line Items]
Beginning balance	$72,046
Equity earnings	9,895	1,307
Contributions	1,197	72,740
Distributions	-9,827	-2,451
Amortization of premium	-309	-41
Other comprehensive income	-144	492
Ending balance	72,858	72,046
Gulf LNG Holdings Group, LLC Acquisition [Member]
Schedule Of Equity Method Investments [Line Items]
Investment in subsidiaries		72,739
Equity earnings		1,307
Contributions			$72,740	$72,740

Investment_in_Unconsolidated_A3

Investment in Unconsolidated Affiliate - Additional Information (Detail) (USD $)	12 Months Ended		0 Months Ended	1 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Nov. 12, 2013	Nov. 30, 2013
Business Acquisition [Line Items]
Purchase of LNG Interest from an affiliate	$1,197,000	$72,740,000
Gulf LNG Holdings Group, LLC Acquisition [Member]
Business Acquisition [Line Items]
Purchase of LNG Interest from an affiliate			72,740,000	72,740,000
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 $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014
Gulf LNG Holdings Group, LLC Acquisition [Member]
Business Acquisition [Line Items]
Estimated future amortization expense, 2015	$309
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	$8,298

Investment_in_Unconsolidated_A5

Investment in Unconsolidated Affiliate - Summarized Financial Information for the Gulf LNG Holdings (Detail) (USD $)	3 Months Ended								12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Balance sheets
Current assets	$12,756				$10,658				$12,756	$10,658
Total assets	331,588				339,366				331,588	339,366
Current liabilities	4,712				6,411				4,712	6,411
Total liabilities and partners’ capital	331,588				339,366				331,588	339,366
Income statements
Revenues	13,275	13,690	14,727	13,213	12,512	12,625	13,096	9,608	54,906	47,841	22,864
Total operating costs and expenses									59,779	39,483	16,082
Operating income	-6,481	39	1,185	384	2,804	2,733	2,837	-17	-4,873	8,358	6,782
Net income					138	674	738	9,511	1,275	11,061	5,423
Gulf LNG Holdings Group, LLC Acquisition [Member]
Balance sheets
Current assets	12,537				8,694				12,537	8,694
Noncurrent assets	926,980				952,630				926,980	952,630
Total assets	939,517				961,324				939,517	961,324
Current liabilities	85,818				81,173				85,818	81,173
Long-term liabilities	733,401				773,115				733,401	773,115
Member’s equity	120,298				107,036				120,298	107,036
Total liabilities and partners’ capital	939,517				961,324				939,517	961,324
Income statements
Revenues									186,243	186,090
Total operating costs and expenses									56,743	56,146
Operating income									129,500	129,944
Net income									$96,062	$94,895

Investment_in_Unconsolidated_A6

Investment in Unconsolidated Affiliate - Schedule of Partners Equity Earnings in LNG Interest (Detail) (USD $)	3 Months Ended				12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Net Investment Income [Line Items]
Net income	$138	$674	$738	$9,511	$1,275	$11,061	$5,423
Net Income attributable to the Partnership from November 12, 2013 through December 31, 2013					648	9,638	5,423
Equity earnings from unconsolidated affiliate					9,895	1,307
Gulf LNG Holdings Group, LLC Acquisition [Member]
Net Investment Income [Line Items]
Net income					96,062	94,895
Percentage of Net Income attributable to the Partnership from November 12, 2013 through December 31, 2013						13.00%
Net Income attributable to the Partnership from November 12, 2013 through December 31, 2013						12,689
Percentage of ownership in Gulf LNG Holdings						10.30%
Equity earnings from unconsolidated affiliate						$1,307

Property_Plant_and_Equipment_S

Property, Plant and Equipment - Schedule of Property, Plant and Equipment (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$218,714	$218,328
Less: Accumulated depreciation	-22,828	-16,851
Property, plant and equipment, net	195,886	201,477
Land [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	49,615	51,175
Building and Site Improvements [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	36,298	34,660
Tanks and Trim [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	91,463	92,337
Machinery and Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	32,815	32,819
Office Furniture and Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	2,348	2,334
Construction in Progress [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$6,175	$5,003

Intangible_Assets_Summary_of_P

Intangible Assets - Summary of Partnership's Intangible Assets (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Finite Lived Intangible Assets [Line Items]
Intangible assets, gross	$45,426	$45,426
Less: Accumulated amortization	-12,237	-7,119
Intangible assets, net	33,189	38,307
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 $)	Dec. 31, 2014
In Millions, unless otherwise specified
Finite Lived Intangible Assets Future Amortization Expense [Abstract]
Estimated future amortization expense, 2015	$4.30
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 $)	0 Months Ended	1 Months Ended		12 Months Ended		1 Months Ended
	Nov. 12, 2013	Nov. 30, 2013	Oct. 31, 2007	Dec. 31, 2014	Dec. 31, 2012	Feb. 28, 2013	Jan. 31, 2012	Aug. 31, 2010	Dec. 31, 2013
Line Of Credit Facility [Line Items]
Line of Credit Facility, amount			$10,000,000	$23,400,000				20,000,000
Credit facility				111,063,000					105,563,000
Line of Credit Facility, interest rate				2.92%
Sublimit for issuance of swing line loans	5,000,000
Commitment fee percentage on unused portion of facility			1.00%
Percentage of increase in interest rate on default exists	2.00%
Reduction in revolving line of credit		6,000,000
Interest rate description				One month London Interbank Offer Rate (“LIBOR”) plus 2.75%
Distributions in excess, amount				18,179,000	6,081,000
Extended credit facility maturity date				Mar-12
Gulf Coast Asphalt Company, L.L.C. [Member]
Line Of Credit Facility [Line Items]
Line of Credit Facility, amount				20,000,000
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]
Revolving line of credit, initiation date				31-Jan-12
Line of Credit Facility, amount	175,000,000						40,000,000
Amount of commitments under the Credit Facility	100,000,000
Credit Facility, maturity date				12-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
Terminal Credit Facility [Member]
Line Of Credit Facility [Line Items]
Line of Credit Facility, amount						65,000,000
Maximum Credit Facility to be maintained as per credit facility				3.75		5
Credit facility borrowing amount				22,000,000
Reduction in revolving line of credit				20,000,000
Decrease in Partnership leverage ratio				3.5		4
Minimum fixed charge ratio				1.25		1.25
Credit facility, term						3 years
Terminal Credit Facility [Member] | Gulf Coast Asphalt Company, L.L.C. [Member]
Line Of Credit Facility [Line Items]
Additional credit facility amount borrowed						55,000,000
Terminal Credit Facility [Member] | Motiva [Member]
Line Of Credit Facility [Line Items]
Additional credit facility amount borrowed						27,000,000
Terminal Credit Facility [Member] | Term Loan [Member]
Line Of Credit Facility [Line Items]
Line of Credit Facility, amount						65,000,000
Line of Credit [Member]
Line Of Credit Facility [Line Items]
Credit facility, term			12 months
Revolving line of credit, interest rate floor			5.50%
Debt instrument, maturity date				1-Aug-11
Ratio of Earnings Before Income Taxes Depreciation and Amortization to designated expenses								1
Extinguishment of debt							20,000,000
Line of Credit [Member] | Minimum [Member]
Line Of Credit Facility [Line Items]
Distributions in excess, amount								5,000,000
Line of Credit [Member] | One Month LIBOR [Member]
Line Of Credit Facility [Line Items]
Basis points spread on floating rate debt			2.75%

Preferred_Units_Additional_Inf

Preferred Units - Additional Information (Detail) (USD $)	12 Months Ended		1 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Nov. 30, 2013	Feb. 28, 2013
Preferred Units [Line Items]
Percentage of preferred units annual distributions	8.00%
Period of preferred unit quarterly distributions paid	45 days
Percentage of interest rate on unpaid distribution dividend	8.00%
Deemed distributions		$1,770,000
Gulf Coast Asphalt Company, L.L.C. [Member]
Preferred Units [Line Items]
Preferred units issued				1,500,000
Issuance of preferred units				30,000,000
Common units		779	779
Subordinated units		58,426	58,426
Cash paid in exchange for preferred units			$29,000,000

Partners_Capital_and_Distribut2

Partners' Capital and Distributions - Additional Information (Detail) (USD $)	1 Months Ended	12 Months Ended		0 Months Ended
In Millions, except Share data, unless otherwise specified	Nov. 30, 2013	Dec. 31, 2014	Dec. 31, 2013	Nov. 18, 2013	Nov. 12, 2013
Limited Partners Capital Account [Line Items]
Proceeds from offering through underwriters	$120.20
Percentage of incentive distribution rights in Partnership	100.00%
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
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
Gulf Coast Asphalt Company, L.L.C. [Member]
Limited Partners Capital Account [Line Items]
Common units	779		779
Subordinated units	58,426		58,426
Cash paid in exchange for preferred units	$29.80		$29.80
Lightfoot Capital Partners LP [Member]
Limited Partners Capital Account [Line Items]
Common units	68,617
Subordinated units	5,146,264
Center Oil [Member]
Limited Partners Capital Account [Line Items]
Common units	11,685
Subordinated units	876,391
Limited Partners [Member] | Initial Public Offering [Member]
Limited Partners Capital Account [Line Items]
Common units issued in initial public offering	6,786,869			786,869	6,000,000
Common units issued, per unit	$19			$19	$19

Partners_Capital_Schedule_of_O

Partners' Capital - Schedule of Outstanding Capital Units (Detail)	12 Months Ended
	Dec. 31, 2013		Dec. 31, 2014
Preferred Units [Member]
Limited Partners Capital Account [Line Items]
Issuance of preferred units	1,500,000
Contribution of preferred units	-1,500,000	[1]
Limited Partner Common Units [Member]
Limited Partners Capital Account [Line Items]
Units outstanding, beginning balance	80,302		6,867,950
Contribution of preferred units	779	[1]
Issuance of common units	6,786,869
Units outstanding, ending balance	6,867,950		6,867,950
Limited Partner Subordinated Units [Member]
Limited Partners Capital Account [Line Items]
Units outstanding, beginning balance	6,022,655		6,081,081
Contribution of preferred units	58,426	[1]
Units outstanding, ending balance	6,081,081		6,081,081
[1]	GCAC contributed its preferred units in Arc Terminals in exchange for 779 common units and 58,426 subordinated units in the Partnership and $29.8 million in cash.

Partners_Capital_Schedule_of_O1

Partners' Capital - Schedule of Outstanding Capital Units (Parenthetical) (Detail) (Gulf Coast Asphalt Company, L.L.C. [Member], USD $)	1 Months Ended	12 Months Ended
In Millions, except Share data, unless otherwise specified	Nov. 30, 2013	Dec. 31, 2013
Gulf Coast Asphalt Company, L.L.C. [Member]
Limited Partners Capital Account [Line Items]
Common units	779	779
Subordinated units	58,426	58,426
Cash paid in exchange for preferred units	$29.80	$29.80

Partners_Capital_and_Distribut3

Partners' Capital and Distributions - Schedule of the Quarterly Distributions Related to the Partnership's Quarterly Financial Results (Detail) (USD $)	3 Months Ended						12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013		Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Incentive Distribution Managing Member Or General Partner [Abstract]
Total Quarterly Distribution Per Unit	$0.41	$0.41	$0.40	$0.39	$0.21
Total Cash Distribution	$5,309	$5,309	$5,180	$5,018	$2,673		$18,179	$1,770	$6,081
Date of Distribution	17-Feb-15	17-Nov-14	18-Aug-14	16-May-14	18-Feb-14	[1]
Unitholders Record Date	9-Feb-15	10-Nov-14	11-Aug-14	9-May-14	10-Feb-14	[1]
[1]	Initial pro rata cash distribution, prorated for the period from November 13, 2013 to December 31, 2013.

Partners_Capital_and_Distribut4

Partners' Capital and Distributions - Percentage of Incentive Distribution Rights to Partnership's Unitholders and General Partner (Detail)	12 Months Ended
	Dec. 31, 2014
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 $)	12 Months Ended
	Dec. 31, 2014
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 $)	12 Months Ended			1 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Jul. 31, 2014	Nov. 30, 2013
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Unit-based compensation	$3,138,000	$0	$0
Payments to phantom unit holders	416,000
Unit-based compensation	3,138,000
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	400,000
Unrecognized unit-based compensation expense	2,200,000
Employee Equity Grants
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Unit-based compensation	2,800,000
Employee Equity Grants Vest One
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Unrecognized unit-based compensation expense	18,300,000
2013 Long-Term Incentive Plan | Selling, general and administrative
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Unit-based compensation	3,138,000
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	800,000
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 | Employee Equity Grants And Consultants
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Payments to phantom unit holders	-400,000
Unit-based compensation	$300,000
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 $)	12 Months Ended
	Dec. 31, 2014
Equity Award [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of Phantom Units, Beginning Balance	0
Number of Phantom Units, Granted	932,000
Number of Phantom Units, Forfeited	-3,500
Number of Phantom Units, Ending Balance	928,500
Weighted Avg. Grant Date Fair Value, Granted	$25.46
Weighted Avg. Grant Date Fair Value, Forfeited	$25.46
Weighted Avg. Grant Date Fair Value, Ending Balance	$25.46
Liability Award [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of Phantom Units, Beginning Balance	0
Number of Phantom Units, Granted	7,500
Number of Phantom Units, Ending Balance	7,500
Weighted Avg. Grant Date Fair Value, Granted	$25.46
Weighted Avg. Grant Date Fair Value, Ending Balance	$25.46
Fair Value, Granted	$17.06
Fair Value, Vested	$0
Fair Value, Forfeited	$0
Fair Value, Ending Balance	$17.06

Earnings_Per_Unit_Schedule_of_

Earnings Per Unit - Schedule of Earnings Per Unit (Detail) (USD $)	3 Months Ended								12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Earnings Per Share Diluted [Line Items]
Net income	($4,964)	$1,636	$2,742	$1,861	$361	$1,274	$1,338	$9,857	$1,275	$12,831	$5,423
Less: Distribution equivalent rights for unissued units									627
Less: preferred unit distributions					223	600	600	347		1,770
Less: earnings attributable to preferred units										1,423
Net income available to limited partners									648	9,638	5,423
Denominator for basic earnings per limited partner unit:
Total basic units outstanding									12,949	7,100	6,103
Denominator for diluted earnings per limited partner unit:
Total diluted units outstanding									12,949	8,614	6,103
Common Units [Member]
Earnings Per Share Diluted [Line Items]
Net income available to limited partners									343	247	71
Denominator for basic earnings per limited partner unit:
Total basic units outstanding					4,035	80	80	80	6,868	1,069	80
Earnings per limited partner unit, basic:
Earnings per limited partner unit, basic					$0.03	$0.09	$0.10	$1.37	$0.05	$0.23	$0.89
Denominator for diluted earnings per limited partner unit:
Total diluted units outstanding					10,093	80	80	80	6,868	2,583	80
Earnings per limited partner unit, diluted:
Earnings per limited partner unit, diluted					$0.01	$0.09	$0.10	$1.37	$0.05	$0.10	$0.89
Subordinated Units [Member]
Earnings Per Share Diluted [Line Items]
Net income available to limited partners									$305	$9,391	$5,352
Denominator for basic earnings per limited partner unit:
Total basic units outstanding									6,081	6,031	6,023
Earnings per limited partner unit, basic:
Earnings per limited partner unit, basic					$0	$0.09	$0.10	$1.37	$0.05	$1.56	$0.89
Denominator for diluted earnings per limited partner unit:
Total diluted units outstanding									6,081	6,031	6,023
Earnings per limited partner unit, diluted:
Earnings per limited partner unit, diluted					$0	$0.09	$0.10	$1.37	$0.05	$1.56	$0.89

Segment_Reporting_Additional_I

Segment Reporting - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2014
	Segment
Segment Reporting [Abstract]
Number of reportable segment	1

Related_Party_Transactions_Add

Related Party Transactions - Additional Information (Detail) (USD $)

12 Months Ended

1 Months Ended

0 Months Ended

1 Months Ended

0 Months Ended

Dec. 31, 2014

Dec. 31, 2013

Dec. 31, 2012

Jan. 31, 2014

Nov. 12, 2013

Nov. 30, 2013

Feb. 28, 2013

31-May-13

31-May-11

Feb. 28, 2010

Aug. 31, 2010

Oct. 31, 2007

bbl

Boe

Related Party Transaction [Line Items]

Selling, general and administrative expenses-affiliate

$3,990,000

$2,484,000

$2,592,000

Due to general partner

409,000

127,000

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 a registration statement to register the common units issued to our Sponsor and the common units issuable upon the conversion of the subordinated units upon request of the Sponsor. In addition, the registration rights agreement gives the Sponsor piggyback registration rights under certain circumstances.

Contributions

1,197,000

72,740,000

Partnership's Credit Facility

23,400,000

20,000,000

10,000,000

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

Operating lease, additional spending

5,600,000

Number of barrels per day of oil equivalent

12,500

Percentage of variable rate on base rent

30.00%

Operating lease agreement expense

6,500,000

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]

Description of increase in base rent

increase each month starting with the month of August 2014 by a factor of 0.00958 of the specified construction costs incurred by LCP Oregon at the Portland Terminal

LCP Oregon Holdings LLC [Member] | Minimum [Member]

Related Party Transaction [Line Items]

Construction costs estimated

10,000,000

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 LNG Holdings Group, LLC Acquisition [Member]

Related Party Transaction [Line Items]

Contributions

72,740,000

72,740,000

Gulf Coast Asphalt Company, L.L.C. [Member]

Related Party Transaction [Line Items]

Partnership's Credit Facility

20,000,000

Cash paid for Partnership acquired

25,000,000

Number of barrels of storage tanks

150,000

Initial term of agreement

5 years

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

General Partners [Member]

Related Party Transaction [Line Items]

Selling, general and administrative expenses-affiliate

4,000,000

2,500,000

2,600,000

Due to general partner

$400,000

$100,000

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%

Agreement renewal, month and year

2015-05

2015-05

Related_Party_Transactions_Sch

Related Party Transactions - Schedule of Revenue from Related Parties (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Related Party Transaction [Line Items]
Related parties	$9,230	$8,179	$9,663
Center Oil [Member]
Related Party Transaction [Line Items]
Related parties	7,382	7,587	9,663
Gulf Coast Asphalt Company, L.L.C. [Member]
Related Party Transaction [Line Items]
Related parties	$1,848	$592

Related_Party_Transactions_Sch1

Related Party Transactions - Schedule of Accounts Receivable due from Related Parties (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Notes Receivable Related Parties [Line Items]
Due from related parties	$900	$722
Center Oil [Member]
Notes Receivable Related Parties [Line Items]
Due from related parties	594	536
Gulf Coast Asphalt Company, L.L.C. [Member]
Notes Receivable Related Parties [Line Items]
Due from related parties	$306	$186

Major_Customers_Additional_Inf

Major Customers - Additional Information (Detail) (Minimum [Member], Sales Revenue, Net [Member])	12 Months Ended
	Dec. 31, 2014
Minimum [Member] | Sales Revenue, Net [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)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Revenues [Member]
Entity Wide Revenue Major Customer [Line Items]
Total percentages of revenue and receivables associated with significant customers	32.00%	19.00%	44.00%
Receivables [Member]
Entity Wide Revenue Major Customer [Line Items]
Total percentages of revenue and receivables associated with significant customers	39.00%	17.00%
Chevron U.S.A. Inc. [Member] | Revenues [Member]
Entity Wide Revenue Major Customer [Line Items]
Total percentages of revenue and receivables associated with significant customers	19.00%	3.00%	2.00%
Chevron U.S.A. Inc. [Member] | Receivables [Member]
Entity Wide Revenue Major Customer [Line Items]
Total percentages of revenue and receivables associated with significant customers	26.00%	7.00%
Center Oil [Member] | Revenues [Member]
Entity Wide Revenue Major Customer [Line Items]
Total percentages of revenue and receivables associated with significant customers	13.00%	16.00%	42.00%
Center Oil [Member] | Receivables [Member]
Entity Wide Revenue Major Customer [Line Items]
Total percentages of revenue and receivables associated with significant customers	13.00%	10.00%

Commitments_and_Contingencies_1

Commitments and Contingencies - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2014	Feb. 28, 2013
	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]
Earnout payments, high	5,000,000		5,000,000
Earnout payments, low	0
Number of customers	1
Gulf LNG Holdings [Member]
Operating Leased Assets [Line Items]
Capital call		11,600,000
Partnership pro-rata share of committed capital		1,200,000
Partnership pro-rata share of remaining capital		300,000
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 $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Commitments And Contingencies Disclosure [Abstract]
Long-term debt obligations, Total	$111,063	$105,563
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	30,251
Operating lease obligations, 2015	6,346
Operating lease obligations, 2016	6,511
Operating lease obligations, 2017	6,382
Operating lease obligations, 2018	10,906
Operating lease obligations, 2019	106
Contractual obligations, Total	141,314
Contractual obligations, 2015	6,346
Contractual obligations, 2016	6,511
Contractual obligations, 2017	6,382
Contractual obligations, 2018	10,906
Contractual obligations, 2019	111,169
Contractual obligations, thereafter	$0

Quarterly_Financial_Data_Sched

Quarterly Financial Data - Schedule of Quarterly Financial Data (Detail) (USD $)	3 Months Ended								12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Schedule Of Quarterly Financial Data [Line Items]
Revenues	$13,275	$13,690	$14,727	$13,213	$12,512	$12,625	$13,096	$9,608	$54,906	$47,841	$22,864
Operating income	-6,481	39	1,185	384	2,804	2,733	2,837	-17	-4,873	8,358	6,782
Net income (loss)	-4,964	1,636	2,742	1,861	361	1,274	1,338	9,857	1,275	12,831	5,423
Less: Net income attributable to preferred units					223	600	600	347		1,770
Net income attributable to partners' capital					$138	$674	$738	$9,511	$1,275	$11,061	$5,423
Weighted average number of limited partners units outstanding, basic:
Total basic units outstanding									12,949	7,100	6,103
Weighted average number of limited partners units outstanding, diluted:
Total diluted units outstanding									12,949	8,614	6,103
Common Units [Member]
Net income per limited partner unit (basic and diluted):
Basic and diluted net income per limited partner unit	($0.40)	$0.11	$0.21	$0.14
Weighted average number of limited partners units outstanding (basic and diluted):
Weighted average number of limited partners units outstanding, basic and diluted	6,868	6,868	6,868	6,868
Net income per limited partner unit, basic:
Net income per limited partner unit, basic					$0.03	$0.09	$0.10	$1.37	$0.05	$0.23	$0.89
Net income per limited partner unit, diluted:
Net income per limited partner unit, diluted					$0.01	$0.09	$0.10	$1.37	$0.05	$0.10	$0.89
Weighted average number of limited partners units outstanding, basic:
Total basic units outstanding					4,035	80	80	80	6,868	1,069	80
Weighted average number of limited partners units outstanding, diluted:
Total diluted units outstanding					10,093	80	80	80	6,868	2,583	80
Subordinated Units [Member]
Net income per limited partner unit (basic and diluted):
Basic and diluted net income per limited partner unit	($0.40)	$0.11	$0.21	$0.14
Weighted average number of limited partners units outstanding (basic and diluted):
Weighted average number of limited partners units outstanding, basic and diluted	6,081	6,081	6,081	6,081
Net income per limited partner unit, basic:
Net income per limited partner unit, basic					$0	$0.09	$0.10	$1.37	$0.05	$1.56	$0.89
Net income per limited partner unit, diluted:
Net income per limited partner unit, diluted					$0	$0.09	$0.10	$1.37	$0.05	$1.56	$0.89
Weighted average number of limited partners units outstanding, basic:
Total basic units outstanding									6,081	6,031	6,023
Subordinated units					6,058	6,023	6,023	6,023
Weighted average number of limited partners units outstanding, diluted:
Total diluted units outstanding									6,081	6,031	6,023
Subordinated units						6,023	6,023	6,023

Subsequent_Events_Additional_I

Subsequent Events - Additional Information (Detail) (USD $)

1 Months Ended

3 Months Ended

1 Months Ended

0 Months Ended

1 Months Ended

In Millions, except Share data, unless otherwise specified

Nov. 30, 2013

Dec. 31, 2014

Sep. 30, 2014

Jun. 30, 2014

Mar. 31, 2014

Dec. 31, 2013

Jul. 31, 2014

Mar. 31, 2015

Feb. 19, 2015

Jan. 31, 2015

Nov. 12, 2013

Subsequent Event [Line Items]

Total distribution per unit

$0.41

$0.41

$0.40

$0.39

$0.21

Cash distribution payment date

17-Feb-15

17-Nov-14

18-Aug-14

16-May-14

18-Feb-14

[1]

Cash distribution date of record

9-Feb-15

10-Nov-14

11-Aug-14

9-May-14

10-Feb-14

[1]

Net proceeds from Offering

$120.20

Phantom Units

Subsequent Event [Line Items]

Number of shares granted under the plan

939,500

Phantom Units | Forecast [Member]

Subsequent Event [Line Items]

Number of shares granted under the plan

45,668

Existing Credit Agreement [Member]

Subsequent Event [Line Items]

Credit facility aggregate amount outstanding

275

Subsequent Event [Member]

Subsequent Event [Line Items]

Cash distribution, declaration month and year

2015-01

Cash distribution, total amount

5.3

Cash distribution payment date

17-Feb-15

Cash distribution date of record

9-Feb-15

Percentage of partner interest in partnership

42.90%

Percentage of interest in general partner

100.00%

Proceeds from private placement

75

Subsequent Event [Member] | Sun Trust

Subsequent Event [Line Items]

Credit facility

275

Credit facility amendment, month and year

100.00%

Subsequent Event [Member] | PIPE Transaction [Member]

Subsequent Event [Line Items]

Sale of common units, shares

4,411,765

Price per unit of common units

$17

Commitment fee percentage

1.00%

Private placement transaction due date

18-May-15

Commitment payment period

90 days

Subsequent Event [Member] | JBBR Purchase Agreement [Member]

Subsequent Event [Line Items]

Business acquisition, date of acquisition agreement

19-Feb-15

Cash paid to seller

216

Subsequent Event [Member] | JBBR Purchase Agreement [Member] | Partnership [Member]

Subsequent Event [Line Items]

Business combination, equity interest in acquire percentage

60.00%

Subsequent Event [Member] | JBBR Purchase Agreement [Member] | GE Energy Financial Services [Member]

Subsequent Event [Line Items]

Business combination, equity interest in acquire percentage

40.00%

Subsequent Event [Member] | Equity Commitment Letters [Member]

Subsequent Event [Line Items]

Business acquisition, date of acquisition agreement

19-Feb-15

Subsequent Event [Member] | Equity Commitment Letters [Member] | Partnership [Member]

Subsequent Event [Line Items]

Business combination, equity interest in acquire percentage

60.00%

Subsequent Event [Member] | Equity Commitment Letters [Member] | G E Equity Provider

Subsequent Event [Line Items]

Business combination, equity interest in acquire percentage

40.00%

Subsequent Event [Member] | MTP Energy Master Fund Ltd [Member]

Subsequent Event [Line Items]

Net proceeds from Offering

$9.50

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

[1]

Initial pro rata cash distribution, prorated for the period from November 13, 2013 to December 31, 2013.