Third Coast Midstream (AMID) 10-Q 11 Aug 14 2014 Q2 Quarterly report Financial data

Document_and_Entity_Informatio

Document and Entity Information	6 Months Ended
	Jun. 30, 2014	Aug. 07, 2014	Dec. 31, 2013
Document Information [Line Items]	'	'	'
Entity Registrant Name	'American Midstream Partners, LP	'	'
Entity Central Index Key	'0001513965	'	'
Document Type	'10-Q	'	'
Document Period End Date	30-Jun-14	'	'
Amendment Flag	'false	'	'
Document Fiscal Year Focus	'2014	'	'
Document Fiscal Period Focus	'Q2	'	'
Current Fiscal Year End Date	'--12-31	'	'
Entity Filer Category	'Non-accelerated Filer	'	'
Entity Common Stock, Shares Outstanding	'	11,143,553	'
Temporary Equity, Shares Outstanding	5,430,455	5,430,455	5,279,000
Limited Partners' Capital Account, Units Outstanding	11,139,729	'	7,414,000
Series B [Member]	'	'	'
Document Information [Line Items]	'	'	'
Limited Partners' Capital Account, Units Outstanding	1,210,221	1,210,221	0

Condensed_Consolidated_Balance

Condensed Consolidated Balance Sheets (Unaudited) (USD $)	Jun. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Current assets	'	'
Cash and cash equivalents	$3,007	$393
Accounts receivable	7,337	6,822
Unbilled revenue	25,202	23,001
Risk management assets	885	473
Other current assets	5,996	7,497
Assets Held-for-sale, Current	121	272
Total current assets	42,548	38,458
Derivative Assets, Noncurrent	'	0
Property, plant and equipment, net	381,318	312,701
Goodwill	16,253	16,447
Intangible Assets, Net (Excluding Goodwill)	49,522	3,682
Noncurrent assets held for sale, net	1,148	1,723
Other assets, net	8,418	9,064
Total assets	499,207	382,075
Current liabilities	'	'
Accounts payable	10,538	3,261
Accrued gas purchases	17,256	17,386
Accrued Liabilities and Other Liabilities	15,697	15,058
Current portion of long-term debt	574	2,048
Risk management liabilities	602	423
Liabilities of Disposal Group, Including Discontinued Operation, Current	54	114
Total current liabilities	44,721	38,290
Risk management liabilities	36	101
Asset Retirement Obligation	34,648	34,636
Other liabilities	229	191
Long- term debt	136,500	130,735
Deferred Tax Liabilities, Net	4,694	4,749
Liabilities of Disposal Group, Including Discontinued Operation, Noncurrent	0	95
Total liabilities	220,828	208,797
Series A convertible preferred units (5,430 thousand and 5,279 thousand units issued and outstanding as of June 30, 2014, and December 31, 2013, respectively)	100,571	94,811
Partners' capital	'	'
General partner interest (235 thousand and 185 thousand units issued and outstanding as of June 30, 2014, and December 31, 2013, respectively)	-4,212	2,696
Limited partner interest (11,140 thousand and 7,414 thousand units issued and outstanding as of June 30, 2014, and December 31, 2013, respectively)	146,271	71,039
Series B Units, Capital Account	31,052	0
Accumulated other comprehensive income	150	104
Total partners’ capital	173,261	73,839
Noncontrolling interests	4,547	4,628
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	177,808	78,467
Total liabilities, equity and partners' capital	$499,207	$382,075

Condensed_Consolidated_Balance1

Condensed Consolidated Balance Sheets (Parenthetical) (Unaudited)	Jun. 30, 2014	Dec. 31, 2013
Statement of Financial Position [Abstract]	'	'
Series A convertible preferred, units issued	5,430,455	5,279,000
Temporary Equity, Shares Outstanding	5,430,455	5,279,000
General partner interest, units issued	235,129	185,000
General partner interest units outstanding	235,129	185,000
Limited partners, units issued	11,139,729	7,414,000
Limited Partners' Capital Account, Units Outstanding	11,139,729	7,414,000

Condensed_Consolidated_Stateme

Condensed Consolidated Statements of Operations (Unaudited) (USD $)	3 Months Ended		6 Months Ended
Share data in Thousands, except Per Share data, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Income Statement [Abstract]	'	'	'	'
Revenue	$77,873,000	$76,277,000	$158,241,000	$139,181,000
(Loss) gain on commodity derivatives, net	-193,000	914,000	-323,000	609,000
Revenues	77,680,000	77,191,000	157,918,000	139,790,000
Operating expenses:	'	'	'	'
Purchases of natural gas, NGLs and condensate	53,818,000	56,965,000	109,039,000	107,234,000
Direct operating expenses	11,044,000	8,402,000	20,005,000	13,277,000
Selling, general and administrative expenses	5,637,000	4,588,000	11,230,000	8,013,000
Equity compensation expense	435,000	1,097,000	795,000	1,485,000
Depreciation, Depletion and Amortization	6,012,000	8,748,000	13,644,000	14,394,000
Depreciation and accretion expense	4,700,000	6,800,000	11,100,000	12,400,000
Total operating expenses	76,946,000	79,800,000	154,713,000	144,403,000
Gain on involuntary conversion of property, plant and equipment	0	0	0	343,000
Loss on sale of assets, net	0	0	-21,000	0
Impairment of Long-Lived Assets Held-for-use	0	15,232,000	0	15,232,000
Operating income (loss)	734,000	-17,841,000	3,184,000	-19,502,000
Interest expense	-1,680,000	-2,591,000	-3,583,000	-4,322,000
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest	-946,000	-20,432,000	-399,000	-23,824,000
Income Tax Expense (Benefit), Continuing Operations	-149,000	375,000	-138,000	375,000
Net loss from continuing operations	-1,095,000	-20,057,000	-537,000	-23,449,000
Loss from operations of disposal groups, net of tax	-506,000	-1,869,000	-556,000	-1,875,000
Net loss	-1,601,000	-21,926,000	-1,093,000	-25,324,000
Less: Comprehensive income attributable to noncontrolling interests	66,000	188,000	174,000	343,000
Net loss attributable to the Partnership	-1,667,000	-22,114,000	-1,267,000	-25,667,000
Other income (expenses):	'	'	'	'
General partner's interest in net loss	-22,000	'	'	'
Limited partners' interest in net loss	-1,645,000	'	'	'
Distribution Made to Limited Partner, Distributions Declared, Per Unit	$0.46	$0.43	$0.92	$0.87
Limited partners’ net (loss) income from continuing operations per unit (basic)	($0.55)	($4.01)	($0.92)	($4.39)
Limited partners’ net (loss) income per unit (basic)	($0.59)	($4.21)	($0.97)	($4.58)
Income (Loss) from Discontinued Operations, Net of Tax, Per Outstanding Limited Partnership Unit, Basic	($0.04)	($0.20)	($0.05)	($0.19)
Loss from discontinued operations	11,139	9,198	10,496	9,183
Gathering And Processing [Member]	'	'	'	'
Income Statement [Abstract]	'	'	'	'
Revenue	50,015,000	52,525,000	101,641,000	100,766,000
(Loss) gain on commodity derivatives, net	-193,000	914,000	-323,000	609,000
Revenues	49,822,000	53,439,000	101,318,000	101,375,000
Operating expenses:	'	'	'	'
Purchases of natural gas, NGLs and condensate	39,238,000	43,702,000	80,359,000	83,370,000
Direct operating expenses	$5,746,000	$3,637,000	$9,914,000	$7,127,000

Condensed_Consolidated_Stateme1

Condensed Consolidated Statements of Comprehensive Income (Unaudited) (USD $)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Statement of Comprehensive Income [Abstract]	'	'	'	'
Net loss	($1,601)	($21,926)	($1,093)	($25,324)
Other comprehensive income (loss)	10	-43	46	-56
Comprehensive loss	-1,591	-21,969	-1,047	-25,380
Less: Comprehensive income attributable to noncontrolling interests	66	188	174	343
Comprehensive loss attributable to Partnership	-1,657	-22,157	-1,221	-25,723
Accumulated Other Comprehensive Income (Loss) [Member]	'	'	'	'
Statement of Comprehensive Income [Abstract]	'	'	'	'
Net loss	'	'	0	0
Other comprehensive income (loss)	'	'	'	-56
Noncontrolling Interest [Member]	'	'	'	'
Statement of Comprehensive Income [Abstract]	'	'	'	'
Other comprehensive income (loss)	'	'	$0	$0

Condensed_Consolidated_Stateme2

Condensed Consolidated Statements of Changes in Partners' Capital (Unaudited) (USD $)

6 Months Ended

3 Months Ended

6 Months Ended

3 Months Ended

6 Months Ended

6 Months Ended

6 Months Ended

Jun. 30, 2014

Jun. 30, 2013

Jun. 30, 2014

Jun. 30, 2013

Jun. 30, 2014

Jun. 30, 2013

Jun. 30, 2014

Jun. 30, 2013

Dec. 31, 2013

Mar. 31, 2013

Dec. 31, 2012

Jun. 30, 2013

Jun. 30, 2014

Jun. 30, 2013

Dec. 31, 2013

Dec. 31, 2012

Jun. 30, 2014

Jun. 30, 2013

Dec. 31, 2013

Dec. 31, 2012

Jun. 30, 2014

Jun. 30, 2013

Jun. 30, 2014

Jun. 30, 2014

Noncontrolling Interest [Member]

Noncontrolling Interest [Member]

General Partner [Member]

General Partner [Member]

General Partner [Member]

General Partner [Member]

General Partner [Member]

General Partner [Member]

General Partner [Member]

Limited Partner [Member]

Limited Partner [Member]

Limited Partner [Member]

Limited Partner [Member]

Limited Partner [Member]

Series B [Member]

Series B [Member]

Series B [Member]

Series B [Member]

Accumulated Other Comprehensive Income (Loss) [Member]

Accumulated Other Comprehensive Income (Loss) [Member]

Consolidated Entities [Member]

Series B [Member]

Accumulated Other Comprehensive Income (Loss) [Member]

Partners' Capital

$173,261,000

$52,695,000

$4,547,000

$7,338,000

($4,212,000)

'

($4,212,000)

'

$2,696,000

$22,090,000

$548,000

$30,310,000

$146,271,000

$30,310,000

$71,039,000

$79,266,000

$31,052,000

$0

$0

$0

$150,000

$295,000

'

'

Net Income (Loss) Allocated to General Partners

'

'

'

'

'

-905,000

-15,000

-974,000

'

'

'

'

'

'

'

'

'

0

'

'

'

'

'

'

Net Income (Loss) Allocated to Limited Partners

'

'

'

'

'

'

'

'

'

'

'

-21,209,000

-1,252,000

-24,693,000

'

'

'

'

'

'

'

'

'

'

Net loss

-1,093,000

-25,324,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

0

'

'

'

0

0

'

'

Net Income (Loss) Attributable to Parent

-1,267,000

-25,667,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Less: Comprehensive income attributable to noncontrolling interests

174,000

343,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Unitholder contributions

1,276,000

'

0

'

'

'

1,276,000

22,696,000

'

'

'

'

0

0

'

'

0

0

'

'

0

0

'

'

Stock Issued During Period, Value, Other

'

22,696,000

'

0

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Partners' Capital Account, Distributions

-19,285,000

-9,952,000

'

'

-603,000

-80,000

-1,192,000

-203,000

'

'

'

'

-18,093,000

-9,749,000

'

'

0

0

'

'

0

0

'

'

Proceeds from Issuance of Common Stock

'

'

0

0

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Stock and Warrants Issued During Period, Value, Preferred Stock and Warrants

0

'

0

'

'

'

7,164,000

'

'

'

'

'

7,164,000

'

'

'

0

'

'

'

0

'

'

'

Partners' Capital Account, Distributions to Existing Interest

0

15,612,000

'

0

'

'

'

312,000

'

'

'

'

'

15,300,000

'

'

'

0

'

'

'

0

'

'

Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders

0

0

226,000

443,000

'

'

0

0

'

'

'

'

0

0

'

'

0

0

'

'

0

0

'

'

Noncontrolling Interest, Decrease from Redemptions or Purchase of Interests

8,000

0

29,000

'

'

'

0

'

'

'

'

'

21,000

'

'

'

0

'

'

'

0

'

21,000

'

Allocated Partners Capital Account Units, Value, Unit Based Compensation Ltip Vesting

128,000

0

0

0

'

'

511,000

1,125,000

'

'

'

'

639,000

1,125,000

'

'

0

0

'

'

0

0

'

'

Tax Netting Repurchase

-151,000

-339,000

0

0

'

'

0

0

'

'

'

'

-151,000

-339,000

'

'

0

0

'

'

0

0

'

'

Partners' Capital Account, Unit-based Compensation

698,000

1,460,000

0

0

'

'

698,000

1,460,000

'

'

'

'

0

0

'

'

0

0

'

'

0

0

'

'

Other comprehensive income (loss)

46,000

-56,000

0

0

'

'

0

0

'

'

'

'

0

0

'

'

0

0

'

'

'

-56,000

'

'

Unrealized gain (loss) on post retirement benefit plan assets and liabilities

46,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Partners' Capital Account, Public Sale of Units Net of Offering Costs

86,904,000

0

0

'

'

'

0

'

'

'

'

'

86,904,000

'

'

'

0

'

'

'

0

'

'

'

Proceeds from Issuance of Common Limited Partners Units

$31,052,000

'

$0

'

'

'

$0

'

'

'

'

'

$0

'

'

'

'

'

'

'

'

'

'

$0

Condensed_Consolidated_Stateme3

Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $)	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013
Net loss	($1,093,000)	($25,324,000)
Depreciation, Depletion and Amortization	13,644,000	14,394,000
Depreciation and Accretion Expense, Including Discontinued Operation	'	14,431,000
Amortization of Financing Costs	847,000	614,000
Amortization of Weather Derivative Premium	554,000	95,000
Unrealized Gain (Loss) on Derivatives and Commodity Contracts	-113,000	-245,000
Share-based Compensation	730,000	1,460,000
Defined Benefit Plan, Net Periodic Benefit Cost	-23,000	-37,000
Gain on involuntary conversion of property, plant and equipment	0	343,000
Gain on sale of assets, including discontinued operations	106,000	0
Impairment of Long-Lived Assets Held-for-use	0	15,232,000
Impairment of Long-Lived Assets to be Disposed of	673,000	1,807,000
Deferred Income Tax Expense (Benefit), including discontinued operations	-161,000	-414,000
Increase (Decrease) in Accounts Receivable	556,000	-1,976,000
Increase (Decrease) in Unbilled Receivables	2,083,000	2,522,000
Increase (Decrease) in Derivative Assets	965,000	1,134,000
Increase (Decrease) in Other Current Assets	1,547,000	315,000
Increase (Decrease) in Other Noncurrent Assets	22,000	62,000
Increase (Decrease) in Accounts Payable	851,000	3,648,000
Increase Decrease in Accrued Gas Purchase	-188,000	-2,347,000
Increase (Decrease) in Accrued Liabilities	680,000	856,000
Increase (Decrease) in Asset Retirement Obligations	-623,000	0
Increase (Decrease) in Other Operating Liabilities	-38,000	-142,000
Net Cash Provided by (Used in) Operating Activities	-12,411,000	-12,418,000
Acquisition Costs, Period Cost	110,909,000	0
Payments to Acquire Property, Plant, and Equipment	13,229,000	13,606,000
Proceeds from Sale of Property, Plant, and Equipment	6,202,000	0
Insurance proceeds from involuntary conversion of property, plant and equipment	0	482,000
Net Cash Provided by (Used in) Investing Activities	-117,936,000	-13,124,000
Partners' Capital Account, Public Sale of Units Net of Offering Costs	86,904,000	0
Proceeds from Partnership Contribution	1,276,000	575,000
Distributed Earnings	13,793,000	7,805,000
Proceeds from Issuance of Convertible Preferred Units	0	14,393,000
Partners' Capital Account, Distributions	19,285,000	9,952,000
Noncontrolling Interest, Decrease from Redemptions or Purchase of Interests	8,000	0
Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders	0	0
Tax Netting Repurchase	-151,000	-339,000
Payments of Debt Issuance Costs	154,000	1,315,000
Repayments of Notes Payable	1,644,000	1,139,000
Borrowings on other debt	170,000	1,495,000
Repayments of Related Party Debt	0	489,000
Repayments of Other Debt	0	1,274,000
Payments on long-term debt	75,220,000	56,546,000
Proceeds from Issuance of Long-term Debt	80,985,000	51,921,000
Net Cash Provided by (Used in) Financing Activities	108,139,000	1,582,000
Cash and Cash Equivalents, Period Increase (Decrease)	2,614,000	876,000
Cash and cash equivalents, including discontinued operations	3,007,000	1,452,000
Interest Paid	2,718,000	3,049,000
Capital Expenditures Incurred but Not yet Paid	9,501,000	6,023,000
Partners' Capital Account, Distributions to Existing Interest	0	15,612,000
Accrued Unitholder Distributions	5,760,000	2,146,000
Dividends, Paid-in-kind	1,052,000	0
Series B [Member]	'	'
Partners' Capital Account, Public Sale of Units Net of Offering Costs	-30,000,000	0
Partners' Capital Account, Distributions	1,052,000	0
Blackwater [Member]	'	'
Noncash or Part Noncash Acquisition, Net Nonmonetary Assets Acquired (Liabilities Assumed)	0	22,129,000
ArcLight [Member]	'	'
Noncash or Part Noncash Acquisition, Net Nonmonetary Assets Acquired (Liabilities Assumed)	0	59,994,000
Noncontrolling Interest [Member]	'	'
Partners' Capital Account, Public Sale of Units Net of Offering Costs	0	'
Noncontrolling Interest, Decrease from Redemptions or Purchase of Interests	29,000	'
Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders	226,000	443,000
Tax Netting Repurchase	0	0
Partners' Capital Account, Distributions to Existing Interest	'	$0

Organization_and_Basis_of_Pres

Organization and Basis of Presentation	6 Months Ended
	Jun. 30, 2014
Organization, Consolidation and Presentation of Financial Statements [Abstract]	'
Organization and Basis of Presentation	'
	Organization and Basis of Presentation
	Nature of Business
	American Midstream Partners, LP (the “Partnership”), was formed on August 20, 2009 as a Delaware limited partnership for the purpose of operating, developing and acquiring a diversified portfolio of midstream energy assets. We provide natural gas gathering, treating, processing, fractionating, marketing and transportation services primarily in the Gulf Coast and Southeast regions of the United States through our ownership and operation of ten gathering systems, two processing facilities, one fractionation facility, three interstate pipelines and five intrastate pipelines. In addition, we own a 50% undivided, non-operating interest in a processing plant located in southern Louisiana. Through our four marine terminal sites, we provide petroleum, agricultural, and chemical liquid storage services.
	We hold our assets in a series of wholly owned limited liability companies, a limited partnership and a corporation. Our capital accounts consist of general partner interests and limited partner interests.
	Our interstate natural gas pipeline assets transport natural gas through the FERC regulated interstate natural gas pipelines in Louisiana, Mississippi, Alabama and Tennessee. Our interstate pipelines include:
	•	High Point Gas Transmission, LLC, which owns and operates approximately 400 miles of intrastate pipeline and is connected to 40 meters with 32 active producers and offers processing options at the Toca processing plant with delivery to Southern Natural Gas available downstream of the processing plant in Louisiana;
	•	American Midstream (Midla), LLC, which owns and operates approximately 370 miles of interstate pipeline that runs from the Monroe gas field in northern Louisiana south through Mississippi to Baton Rouge, Louisiana;
	•	American Midstream (AlaTenn), LLC, which owns and operates approximately 295 miles of interstate pipeline that runs through the Tennessee River Valley from Selmer, Tennessee to Huntsville, Alabama and serves an eight-county area in Alabama, Mississippi and Tennessee.
	Equity Offering and Series B Convertible Units Issuance
	In January 2014, in connection with the Lavaca Acquisition as discussed in Note 3, the Partnership completed a public equity offering resulting in net proceeds of $86.9 million and the issuance to our General Partner of 1,168,225 Series B convertible units ("Series B Units") representing Series B limited partnership interests in the Partnership. The net proceeds related to the Series B Units issuance was $30.0 million. The Series B Units have the right to share in distributions from the Partnership on a pro-rata basis with holders of the Partnership’s common units and will convert into common units on a one-for-one basis on January 31, 2016.
	Basis of Presentation
	These unaudited condensed consolidated financial statements have been prepared in accordance with GAAP for interim financial information. Accordingly, they do not include all of the information and footnotes required by GAAP for complete financial statements. The year-end balance sheet data was derived from consolidated audited financial statements but does not include disclosures required by GAAP for annual periods. We have made reclassifications to amounts reported in prior period condensed consolidated financial statements to conform to our current year presentation. These reclassifications did not have an impact on net income for the period previously reported. The information furnished herein reflects all normal recurring adjustments which are, in the opinion of management, necessary for a fair statement of financial position and results of operations for the respective interim periods.
	The financial results for the year ended December 31, 2013 and for the three and six months ended June 30, 2013 are not consistent with amounts previously presented as an asset group previously presented as held for sale was reclassified during the current period to held and used. As a result, we reclassified amounts within the comparative periods to reflect that reclassification.
	Our financial results for the three and six months ended June 30, 2014 are not necessarily indicative of the results that may be expected for the full year ended December 31, 2014. These unaudited condensed consolidated financial statements should be read in conjunction with our consolidated financial statements and notes thereto included in i) our Annual Report on Form 10-K for the year ended December 31, 2013 (“Annual Report”) filed on March 11, 2014 and ii) our Annual Report on Form 10-K/A that was filed with the Securities and Exchange Commission ("SEC") on May 12, 2014, which updated portions of our annual report.
	Consolidation Policy
	Our condensed consolidated financial statements include our accounts and those of our subsidiaries in which we have a controlling interest. We hold a 50% undivided interest in the Burns Point gas processing facility in which we are responsible for our proportionate share of the costs and expenses of the facility. Our condensed consolidated financial statements reflect our proportionate share of the revenues, expenses, assets and liabilities of this undivided interest. As of June 30, 2014, we also hold a 92.2% undivided interest in the Chatom Processing and Fractionation facility (the "Chatom System"). Our condensed consolidated financial statements reflect the accounts of the Chatom System and the interests in the Chatom System held by non-affiliated working interest owners are reflected as noncontrolling interests in the Partnership's condensed consolidated financial statements.
	Use of Estimates
	When preparing condensed consolidated financial statements in conformity with GAAP, management must make estimates and assumptions based on information available at the time. These estimates and assumptions affect the reported amounts of assets, liabilities, revenues and expenses, as well as the disclosures of contingent assets and liabilities as of the date of the financial statements. Estimates and judgments are based on information available at the time such estimates and judgments are made. Adjustments made with respect to the use of these estimates and judgments often relate to information not previously available. Uncertainties with respect to such estimates and judgments are inherent in the preparation of financial statements. Estimates and judgments are used in, among other things i) estimating unbilled revenues, accrued gas purchases and operating and general and administrative costs, ii) developing fair value assumptions, including estimates of future cash flows and discount rates, iii) analyzing long-lived assets, goodwill and intangible assets for possible impairment, iv) estimating the useful lives of assets and v) determining amounts to accrue for contingencies, guarantees and indemnifications. Actual results, therefore, could differ materially from estimated amounts.

Acquisitions_and_Divestitures

Acquisitions and Divestitures	6 Months Ended
	Jun. 30, 2014
Business Combinations [Abstract]	'
Mergers, Acquisitions and Dispositions Disclosures [Text Block]	'
	Acquisitions and Divestitures
	Lavaca Acquisition
	On January 31, 2014, the Partnership acquired approximately 120 miles of high- and low-pressure pipelines ranging from four to eight inches in diameter with over 9,000 horsepower of leased compression, and associated facilities located in the Eagle Ford shale in Gonzales and Lavaca Counties, Texas (the “Lavaca Acquisition”). The Lavaca Acquisition was financed with a portion of the net proceeds from the Partnership’s January 2014 equity offering of $86.9 million and proceeds of $30.0 million from the issuance to our General Partner of 1,168,225 Series B Units.
	The Lavaca Acquisition qualified as a business combination in accordance with to ASC 805, Business Combinations, and, as such, the Partnership engaged a third party to estimate the fair value of the assets as of the effective date of the acquisition. A combination of the income and cost approaches were utilized to estimate the fair value of the assets. These fair value measurements are based on significant inputs not observable in the market and thus represent a Level 3 measurement as defined by ASC 820, Fair Value Measurement.
	Primarily using the cost approach to value the physical assets, the fair value estimates are based on i) replacement cost estimates using third party data based on installations of similar assets including an economic obsolescence factor and ii) estimated depreciation on the assets based on third party sources and analysis of the life and use of the assets.
	It was determined as part of the fair value analysis of the acquisition, that the Partnership acquired separately identifiable intangible assets. The Lavaca Acquisition includes a 25-year gas gathering agreement which states that Penn Virginia Corporation (NYSE: PVA) ("PVA") will dedicate certain acreage and all related future production to the gathering infrastructure included in the acquisition. In accordance with ASC 805, contract based intangible assets include the value of rights derived from contractual agreements. The Partnership will receive incremental value from PVA’s development of the reserves within the dedicated acreage and, therefore, it was determined that the dedicated acreage represents intangible assets acquired with the Lavaca Acquisition. The Partnership will amortize the Lavaca Acquisition intangibles using the straight-line method over the life of the related gas gathering agreement and recognize $1.9 million of amortization expense annually over the gas gathering agreement.
	Primarily using the income approach to value the intangible assets, the fair value estimates are based on i) an assumed discount rate of 10.5%; ii) present value of estimated EBITDA; iii) estimated timing and amounts of future operating and development costs; iv) forward market prices as of December 2013 for natural gas and crude oil; and v) an increase in throughput volumes through 2019, declining thereafter.
	The Partnership completed a preliminary purchase price allocation to determine the estimated fair value of the acquired assets. The preliminary allocation is subject to various purchase price adjustments, which could impact the allocation presented below. The following table summarizes the preliminary purchase price allocation for the Lavaca Acquisition (in thousands):
	Property, plant and equipment:
	Land	$	2
	Pipelines	55,654
	Equipment	753
	Total property, plant and equipment	56,409
	Intangible assets	48,000
	Total cash consideration	$	104,409
	For the three and six months ended June 30, 2014, the Lavaca System contributed $3.7 million and $6.0 million of revenue and $0.6 million and $2.2 million of net income, respectively, attributable to the Partnership's Gathering and Processing segment, which are included in the condensed consolidated statement of operations.
	Pro forma financial results are not presented as it is impractical to obtain the necessary information. The seller did not operate the acquired assets as a standalone business and, therefore, historical financial information that is consistent with the operations under the current agreement is not available.
	Other Acquisition
	In the fourth quarter of 2013, High Point Gas Gathering LLC, a subsidiary of the Partnership, entered into a purchase and sale agreement to acquire natural gas pipeline facilities and interests thereto for approximately $6.5 million that are contiguous to, and connect with, our High Point System in offshore Louisiana (the “Williams Pipeline Acquisition”). The closing of the purchase and sale agreement was subject to FERC approval of the seller's application to abandon by sale to us the pipeline facilities and to permit the facilities to serve a gathering function, exempt from FERC's jurisdiction. The FERC granted approval of the application during the first quarter of 2014, and the purchase and sale agreement closed on March 14, 2014. Total consideration was allocated to pipeline fixed assets using the income approach based on Level 3 inputs.
	Blackwater Terminals Acquisition
	Effective December 17, 2013, we acquired Blackwater Midstream Holdings, LLC ("Blackwater"), which operates 1.7 million barrels of storage capacity across four marine terminal sites located in Westwego, Louisiana; Brunswick, Georgia; Harvey, Louisiana; and Salisbury, Maryland. The acquisition of Blackwater represented a transaction between entities under common control and a change in reporting entity. Transfers of net assets or exchanges of shares between entities under common control are accounted for as if the transfer occurred at the beginning of the period or date of common control, which was April 15, 2013.
	For the three and six months ended June 30, 2014, Blackwater contributed $3.9 million and $7.5 million of revenue and $0.4 million of net loss and $0.5 million of net income, respectively, attributable to the Partnership's Terminals segment, which are included in the condensed consolidated statement of operations.
	Subsequent to the acquisition of Blackwater, for the three and six months ended June 30, 2013, Blackwater contributed $2.9 million of revenue and $0.5 million of net loss attributable to the Partnership's Terminals segment, which are included in the condensed consolidated statement of operations.
	High Point System Acquisition
	Effective April 15, 2013, our General Partner contributed to us the High Point System, consisting of 100% of the limited liability company interests in High Point Gas Transmission, LLC and High Point Gas Gathering, LLC. The High Point System entities own midstream assets consisting of approximately 700 miles of natural gas and liquids pipeline assets located in southeast Louisiana, in the Plaquemines and St. Bernard's Parishes, and the shallow water and deep shelf Gulf of Mexico, including the Mississippi Canyon, Viosca Knoll, West Delta, Main Pass, South Pass and Breton Sound zones. Natural gas is collected at more than 75 receipt points that connect hundreds of wells with an emphasis on oil and liquids-rich reservoirs.
	For the three and six months ended June 30, 2014, the High Point System contributed $7.3 million and $14.3 million of revenue and $3.1 million and $7.8 million of net income, respectively, attributable to the Partnership's Transmission segment, which are included in the condensed consolidated statement of operations.
	Subsequent to the contribution from our General Partner, for the three and six months ended June 30, 2013, the High Point System contributed $5.2 million of revenue and $2.0 million of net income, attributable to the Partnership's Transmission segment, which are included in the condensed consolidated statement of operations.
	Madison Divestiture
	On March 31, 2014, the Partnership completed the sale of certain gathering and processing assets in Madison County, Texas. We received $6.1 million in cash proceeds related to the sale. The Partnership recognized a $3.0 million impairment charge related to these assets for the year ended December 31, 2013, which wrote down the assets to a carrying value of $6.1 million as of December 31, 2013.

Summary_of_Significant_Account

Summary of Significant Accounting Policies	6 Months Ended
	Jun. 30, 2014
Accounting Policies [Abstract]	'
Summary of Significant Accounting Policies	'
	Recent Accounting Pronouncements
	In July 2013, the FASB issued Accounting Standards Update ("ASU ") No. 2013-11, Income Taxes (Topic 740): Presentation of an Unrecognized Tax Benefit When a Net Operating Loss Carryforward, a Similar Tax Loss, or a Tax Credit Carryforward Exists (a consensus of the FASB Emerging Issues Task Force). This guidance was issued related to the presentation of an unrecognized tax benefit when a net operating loss carryforward, a similar tax loss or a tax credit carryforward exists. The updated guidance requires an entity to net its unrecognized tax benefits against the deferred tax assets for all same jurisdiction net operating loss carryforward, a similar tax loss, or tax credit carryforwards. A gross presentation will be required only if such carryforwards are not available or would not be used by the entity to settle any additional income taxes resulting from disallowance of the uncertain tax position. The update was effective for the Partnership on January 1, 2014 and did not have a material impact on its condensed consolidated financial statements.
	In April 2014, the FASB issued ASU No. 2014-08, Reporting Discontinued Operations and Disclosures of Disposals of Components of an Entity. This guidance amends the requirements for reporting discontinued operations and requires expanded disclosures for individually significant components of an entity that either have been disposed of or are classified as held for sale, but do not qualify for discontinued operations reporting. Only those disposals of components of an entity that represent a strategic shift that has (or will have) a major effect on an entity’s operations and financial results will be reported as discontinued operations in the financial statements. ASU 2014-08 is effective for annual periods, and interim periods within those years, beginning on or after December 15, 2014 and is applied prospectively. Early adoption is permitted, but only for disposals or classifications as held for sale that have not been reported in financial statements previously issued or available for issuance. The update was early adopted by the Partnership as of April 1, 2014 and did not have a material impact on its condensed consolidated financial statements.
	In May 2014, the FASB issued ASU No. 2014-09, Revenue from Contracts with Customers (Topic 606), which amends the existing accounting standards for revenue recognition. The standard requires an entity to recognize revenue in a manner that depicts the transfer of goods or services to customers at an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. The guidance in ASU 2014-09 is effective for annual reporting periods beginning after December 15, 2016, including interim periods therein. Early adoption is not permitted. The Partnership is currently evaluating the method of adoption and impact this standard will have on its financial statements and related disclosures.

Discontinued_Operations_Notes

Discontinued Operations (Notes)	6 Months Ended
	Jun. 30, 2014
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]	'
Disposal Groups, Including Discontinued Operations, Disclosure [Text Block]	'
	Discontinued Operations
	We classify long-lived assets to be disposed of through sales that meet specific criteria as held for sale. We cease depreciating those assets effective on the date the asset is classified as held for sale. We record those assets at the lower of their carrying value or the estimated fair value less the cost to sell. Until the assets are disposed of, an estimate of the fair value is re-determined when related events or circumstances change.
	As discussed in Note 2 “Recent Accounting Pronouncements”, the Partnership has elected to early adopt ASU 2014-08 effective with the interim period beginning April 1, 2014. The guidance is aimed at reducing the frequency of disposals reported as discontinued operations by focusing on strategic shifts that have, or will have, a major effect on an entity’s operations and financial results. Application of this new standard is prospective and therefore only applicable to those disposals and assets classified as held for sale after adoption of the new guidance. There was not a material impact from early adoption in the quarter ended June 30, 2014.
	During the second quarter of 2013, the board of directors of our General Partner approved a plan to sell certain non-strategic gathering and processing assets which meet specific criteria, qualifying them as held for sale. Subsequently, as part of the Blackwater Acquisition described in Note 3, we acquired long-lived terminal assets classified as held for sale.
	As a result of the planned divestiture of these non-strategic midstream assets, we have accounted for these disposal groups as discontinued operations within our Gathering and Processing and Terminal segments. Accordingly, we reclassified and excluded the disposal groups' results of operations from our results of continuing operations and reported the disposal groups' results of operations as Loss from operations of disposal groups, net of tax in our accompanying condensed consolidated statement of operations for all periods presented. We did not, however, elect to present separately the operating, investing and financing cash flows related to the disposal groups in our accompanying condensed consolidated statement of cash flows as this activity was immaterial for all periods presented. The following table presents the revenue and expenses and Loss from operations of disposal groups, net of tax associated with the assets classified as held for sale for the three and six months ended June 30, 2014 and 2013 (in thousands, except per unit amounts):
		Three months ended June 30,						Six months ended June 30,
		2014			2013			2014			2013
	Revenue	$	212		$	609		$	449		$	1,128
	Expense	(268		)	(671		)	(545		)	(1,196		)
	Loss on impairment of property, plant and equipment	(673		)	(1,807		)	(673		)	(1,807		)
	Loss on sale of assets	(65		)	—			(87		)	—
	Income tax benefit	288			—			300			—
	Loss from operations of disposal groups, net of tax	$	(506	)	$	(1,869	)	$	(556	)	$	(1,875	)
	Limited partners' net loss per unit from discontinued operations (basic and diluted)	$	(0.04	)	$	(0.20	)	$	(0.05	)	$	(0.19	)
	During the second quarter of 2014, the Partnership’s management resolved not to sell a portion of the assets that had previously been reclassified to discontinued operations and assets held for sale in the second quarter of 2013. In accordance with ASC 360, the Partnership reclassified the assets as held and used at the carrying value of the assets before they were classified as held for sale adjusted for depreciation expense that would have been recorded. The Partnership has reclassified the amounts recorded in discontinued operations related to the assets for all prior periods presented, as well as reclassified the assets to held and used on the comparative December 31, 2013 balance sheet.
	The Partnership continues to classify the terminal in Salisbury, Maryland as held for sale as we have begun negotiations for the sale of those assets in the second half of 2014, contingent upon the purchaser’s completion of due diligence activities. There has been a deteriorating market for these certain assets and therefore the Partnership recognized an additional impairment on these assets of $0.7 million ($0.4 million, net of tax) in the three months ended June 30, 2014. The impairment was the result of an analysis of the carrying value of the assets relative to their estimated fair value using a market based approach less costs to sell.

Concentration_of_Credit_Risk_a

Concentration of Credit Risk and Trade Accounts Receivable	6 Months Ended
	Jun. 30, 2014
Risks and Uncertainties [Abstract]	'
Concentration Risk Disclosure [Text Block]	'
	Concentration of Credit Risk and Trade Accounts Receivable
	Our primary market areas are located in the United States along the Gulf Coast and in the Southeast. We have a concentration of trade receivable balances due from companies engaged in the production, trading, distribution and marketing of natural gas, NGL and condensate products. This concentration of customers may affect our overall credit risk in that the customers may be similarly affected by changes in economic, regulatory or other factors. Generally, our customers’ historical financial and operating information is analyzed prior to extending credit. We manage our exposure to credit risk through credit analysis, credit approvals, credit limits and monitoring procedures, and for certain transactions, we may request letters of credit, prepayments or guarantees. We maintain allowances for potentially uncollectible accounts receivable; however, for the three and six months ended June 30, 2014 and 2013, no allowances on or write-offs of accounts receivable were recorded.
	The following table summarizes the percentage of revenue earned from those customers that accounted for 10% or more of the Partnership's consolidated revenue in the condensed consolidated statement of operations for the each of the periods presented below:
		Three months ended June 30,				Six months ended June 30,
		2014		2013		2014		2013
	Customer A	26	%	24	%	27	%	27	%
	Customer B	14	%	11	%	14	%	12	%
	Customer C	11	%	12	%	10	%	13	%
	Customer D	10	%	—	%	10	%	10	%
	Other	39	%	53	%	39	%	38	%
	Total	100	%	100	%	100	%	100	%

Derivatives

Derivatives	6 Months Ended
	Jun. 30, 2014
Derivative Instruments and Hedging Activities Disclosure [Abstract]	'
Derivatives	'
	Derivatives
	Commodity Derivatives
	To minimize the effect of commodity prices and maintain our cash flow and the economics of our development plans, we enter into commodity hedge contracts from time to time. Those commodity hedge contracts may be in the form of swaps, puts and/or collars. The terms of the contracts depend on various factors, including management’s view of future commodity prices, acquisition economics on purchased assets and future financial commitments. This hedging program is designed to mitigate the effect of commodity price downturns while allowing us to participate in some commodity price upside. Management regularly monitors the commodity markets and financial commitments to determine if, when, and at what level commodity hedging is appropriate in accordance with policies that are established by the board of directors of our General Partner. As of June 30, 2014, the aggregate notional volume of our commodity derivatives was 4.7 million gallons.
	We enter into commodity contracts with multiple counterparties. We may be required to post collateral with our counterparties in connection with our derivative positions. As of June 30, 2014, we have not posted collateral with any counterparty. Our counterparties are not required to post collateral with us in connection with their derivative positions. Netting agreements are in place with our counterparties that permit us to offset our commodity derivative asset and liability positions.
	For accounting purposes, no derivative instruments were designated as hedging instruments and were instead accounted for under the mark-to-market method of accounting, with any changes in the fair value of the derivatives recorded in the condensed consolidated balance sheets and through earnings, rather than being deferred until the anticipated transactions affect earnings. The use of mark-to-market accounting for financial instruments can cause non-cash earnings volatility due to changes in the underlying commodity price indices or interest rates.
	Interest Rate Swap
	We entered into an interest rate swap to manage the impact of the interest rate risk associated with our credit facility, effectively converting a portion of our long-term variable rate debt into fixed rate debt. As of June 30, 2014, the notional amount of our interest rate swap was $100.0 million. The interest rate swap was entered into with a single counterparty and we were not required to post collateral.
	Weather Derivative
	In the second quarters of 2013 and 2014, we entered into weather derivatives to mitigate the impact of potential unfavorable weather to our operations under which we could receive payments totaling up to $10.0 million in the event that a hurricane or hurricanes of certain strength pass through the area as identified in the derivative agreement. The weather derivatives are accounted for using the intrinsic value method, under which the fair value of the contract was zero and any amounts received are recognized as gains during the period received. The weather derivatives were entered into with a single counterparty and we were not required to post collateral.
	We paid premiums of $1.0 million and $1.1 million in 2014 and 2013, respectively, which are recorded as current Risk management assets on the balance sheet and are amortized to Direct operating expenses on a straight-line basis over the one year term of the respective contract. For the weather derivative entered into in the second quarter of 2014, the unamortized amount was approximately $0.9 million as of June 30, 2014. The weather derivative entered into in the second quarter of 2013 was fully amortized as of June 30, 2014.
	As of June 30, 2014 and December 31, 2013, the value associated with our commodity derivatives and interest rate swap instrument were recorded in our condensed consolidated balance sheets, under the captions as follows (in thousands):
			Gross Risk Management Assets						Gross Risk Management Liabilities							Net Risk Management Assets (Liabilities)
	Balance Sheet Classification		June 30,			December 31, 2013			June 30,				December 31, 2013			June 30,			December 31, 2013
			2014						2014							2014
	Current		$	885		$	473		$	—			$	—		$	885		$	473
	Noncurrent		—			—			—				—			—			—
	Total assets		$	885		$	473		$	—			$	—		$	885		$	473
	Current		$	153		$	27		$	(755	)		$	(450	)	$	(602	)	$	(423	)
	Noncurrent		—			—			(36		)		(101		)	(36		)	(101		)
	Total liabilities		$	153		$	27		$	(791	)		$	(551	)	$	(638	)	$	(524	)
	For the three and six months ended June 30, 2014 and 2013, respectively, the realized and unrealized gains (losses) associated with our commodity derivatives, interest rate swap instrument and weather derivative were recorded in our condensed consolidated statements of operations, under the captions as follows (in thousands):
		Three months ended June 30,						Six months ended June 30,
		Gain (loss) on derivatives						Gain (loss) on derivatives
	Statement of Operations Classification	Realized			Unrealized			Realized				Unrealized
	2014
	Loss on commodity derivatives, net	$	(80	)	$	(113	)	(182		)		(141		)
	Interest expense	(109		)	38			(213		)		28
	Direct operating expenses	(269		)	—			(553		)		—
	Total	$	(458	)	$	(75	)	$	(948	)		$	(113	)
	2013
	Gain on commodity derivatives, net	$	360		$	554		536				73
	Interest expense	—			(318		)	—				(318		)
	Direct operating expenses	(95		)	—			(95		)		—
	Total	$	265		$	236		$	441			$	(245	)

Fair_Value_Measurement

Fair Value Measurement	6 Months Ended
	Jun. 30, 2014
Fair Value Disclosures [Abstract]	'
Fair Value Measurement	'
	Fair Value Measurement
	The authoritative guidance for fair value measurements establishes a three-tier fair value hierarchy, which prioritizes the inputs used to measure fair value. These tiers include:
	•	Level 1 – Inputs represent unadjusted quoted prices in active markets for identical assets or liabilities;
	•	Level 2 – Inputs include quoted prices for similar assets and liabilities in active markets that are either directly or indirectly observable; and
	•	Level 3 – Inputs are unobservable and considered significant to fair value measurement.
	A financial instrument’s categorization within the fair value hierarchy is based upon the lowest level of input that is significant to the fair value measurement. Our assessment of the significance of a particular input to the fair value measurement requires judgment and may affect the classification of assets and liabilities within the fair value hierarchy.
	We believe the carrying amount of cash and cash equivalents approximates fair value because of the short-term maturity of these instruments. Our cash and cash equivalents would be classified as Level 1 under the fair value hierarchy.
	The recorded value of the amounts outstanding under the credit facility approximates its fair value, as interest rates are variable, based on prevailing market rates and the short-term nature of borrowings and repayments under the credit facility. Our existing revolving credit facility would be classified as Level 1 under the fair value hierarchy.
	The fair value of all derivatives instruments is estimated using a market valuation methodology based upon forward commodity price curves, volatility curves as well as other relevant economic measures, if necessary. Discount factors may be utilized to extrapolate a forecast of future cash flows associated with long dated transactions or illiquid market points. The inputs are obtained from independent pricing services, and we have made no adjustments to the obtained prices.
	We have consistently applied these valuation techniques in all periods presented and believe we have obtained the most accurate information available for the types of derivatives contracts held.
	Fair Value of Financial Instruments
	The following table sets forth by level within the fair value hierarchy, our commodity derivative instruments and interest rate swap, included as part of Risk management assets and Risk management liabilities within the condensed consolidated balance sheet, that were measured at fair value on a recurring basis as of June 30, 2014 and December 31, 2013 (in thousands):
		Carrying			Estimated Fair Value
		Amount			Level 1		Level 2			Level 3		Total
	Commodity derivative instruments, net
	June 30, 2014	$	(211	)	$	—	$	(211	)	$	—	$	(211	)
	December 31, 2013	(70		)	—		(70		)	—		(70		)
	Interest rate swap
	30-Jun-14	$	(426	)	$	—	$	(426	)	$	—	$	(426	)
	31-Dec-13	(454		)	—		(454		)	—		(454		)
	The premium paid to enter the weather derivative described in Note 6 "Derivatives" is included within Risk management assets on the balance sheet but is not included as part of the above table as it is recorded at amortized carrying cost, not fair value.

Property_Plant_and_Equipment

Property, Plant and Equipment	6 Months Ended
	Jun. 30, 2014
Property, Plant and Equipment [Abstract]	'
Property, Plant and Equipment	'
	Property, Plant and Equipment
	Property, plant and equipment, net, as of June 30, 2014 and December 31, 2013 were as follows (in thousands):
		Useful Life	June 30,			December 31,
		(in years)	2014			2013
	Land	N/A	$	6,133		$	6,015
	Construction in progress	N/A	20,305			6,443
	Base gas	N/A	1,108			1,108
	Buildings and improvements	4 to 40	5,299			5,109
	Processing and treating plants	8 to 40	98,404			97,106
	Pipelines	5 to 40	298,168			239,865
	Compressors	4 to 20	12,488			11,955
	Dock	20 to 40	7,954			7,942
	Tanks, truck rack and piping	20 to 40	22,432			22,432
	Equipment	8 to 20	8,497			6,294
	Computer software	5	3,595			3,531
	Total property, plant and equipment		484,383			407,800
	Accumulated depreciation		(103,065		)	(95,099		)
	Property, plant and equipment, net		$	381,318		$	312,701
	Of the gross property, plant and equipment balances at June 30, 2014 and December 31, 2013, $101.4 million and $100.5 million, respectively, were related to AlaTenn, Midla and HPGT, our FERC regulated interstate and intrastate assets.
	Capitalized interest was $0.1 million and less than $0.1 million for the three months ended June 30, 2014 and 2013, respectively, and $0.2 million and $0.1 million for the six months ended June 30, 2014 and 2013, respectively.
	Depreciation expense was $4.7 million and $6.8 million for the three months ended June 30, 2014 and 2013, respectively, and $11.1 million and $12.4 million for the six months ended June 30, 2014 and 2013, respectively.

Debt_Obligations

Debt Obligations	6 Months Ended
	Jun. 30, 2014
Debt Disclosure [Abstract]	'
Debt Obligations	'
	Debt Obligations
	As of June 30, 2014, the Partnership's Credit Agreement (the "Credit Agreement") provides for a maximum borrowing equal to $200.0 million subject to, among other restrictions, the requirement that our indebtedness not exceed 5.75 times adjusted consolidated EBITDA. We can elect to have loans under our credit facility bear interest either at a Eurodollar-based rate plus a margin ranging from 1.50% to 3.75% depending on our total leverage ratio then in effect, or a base rate which is a fluctuating rate per annum equal to the highest of (a) the Federal Funds Rate plus 0.50%, (b) the rate of interest in effect for such day as publicly announced from time to time by Bank of America as its “prime rate”, or (c) the Eurodollar Rate plus 1.00% plus a margin ranging from 2.50% to 4.75% depending on the total leverage ratio then in effect. We also paid a commitment fee of 0.50% per annum on the undrawn portion of the revolving loan.
	Our obligations under the credit facility are secured by a first mortgage in favor of the lenders in the majority of our real property. Advances made under the credit facility are guaranteed on a senior unsecured basis by certain of our subsidiaries (the “Guarantors”). These guarantees are full and unconditional and joint and several among the Guarantors. The terms of the new credit facility include covenants that restrict our ability to make cash distributions and acquisitions in some circumstances. The remaining principal balance of loans and any accrued and unpaid interest will be due and payable in full on the maturity date, which is August 1, 2016.
	The credit facility also contains customary representations and warranties (including those relating to organization and authorization, compliance with laws, absence of defaults, material agreements and litigation) and customary events of default (including those relating to monetary defaults, covenant defaults, cross defaults and bankruptcy events). The primary financial covenants contained in the credit facility are i) a total consolidated leverage ratio test (not to exceed 5.75 times) and ii) a minimum interest coverage ratio test (not less than 2.50).
	For the six months ended June 30, 2014 and 2013, the weighted average interest rate on borrowings under our credit facility was approximately 4.18% and 4.48%, respectively.
	As of June 30, 2014, our consolidated total leverage was 3.51 times, which was in compliance with the consolidated total leverage ratio test in our credit facility, and we had approximately $136.5 million of outstanding borrowings under our credit facility and approximately $59.2 million of available borrowing capacity.
	Other debt
	Other debt represents insurance premium financing in the original amount of $2.5 million bearing interest at 3.95% per annum, which is repayable in equal monthly installments of approximately $0.3 million through the third quarter of 2014.
	Our outstanding borrowings at June 30, 2014 and December 31, 2013, respectively, were (in thousands):
		June 30,		December 31,
		2014		2013
	Revolving credit facility	$	136,500	$	130,735
	Other debt	574		2,048
	Total debt	137,074		132,783
	Less: current portion	574		2,048
	Long-term debt	$	136,500	$	130,735
	At June 30, 2014 and December 31, 2013, letters of credit outstanding under the credit facility totaled $4.3 million and $4.8 million, respectively.
	In connection with our credit facility and amendments thereto, we incurred $6.6 million in debt issuance costs that are being amortized on a straight-line basis over the term of the credit facility.

Partners_Capital

Partners' Capital	6 Months Ended
	Jun. 30, 2014
Equity [Abstract]	'
Partners' Capital	'
	Partners’ Capital and Convertible Preferred Units
	Our capital accounts are comprised of approximately a 1.3% general partner interest and 98.7% limited partner interests. Our limited partners have limited rights of ownership as provided for under our partnership agreement and the right to participate in our distributions. Our General Partner manages our operations and participates in our distributions, including certain incentive distributions pursuant to the IDRs that are non-voting limited partner rights held by our General Partner.
	Series B Units
	Effective January 31, 2014, the Partnership created and issued to its General Partner 1,168,225 Series B Units. The Series B Units participate in distributions of the Partnership along with common units, with such distributions being made in cash distributions or with paid-in-kind Series B Units at the election of the Partnership. The Series B Units are entitled to vote along with common unitholders and such units will automatically convert to common units two years after the issuance date. Proceeds from the issuance of the Series B Units were used to partially fund the Lavaca Acquisition.
	During 2014, the Partnership has elected to pay the Series B distributions using paid-in-kind Series B Units. The number of paid-in-kind Series B Units is determined by the quotient of: i) the number of Series B Units outstanding at the record date multiplied by the distribution amount declared to Common Unit Holders (“Series B Unit Distribution Amount”), and ii) the Series B Unit Distribution Amount divided by the original issue price of the Series B Units. The Partnership records the paid-in-kind Series B Units at fair value at the time of issuance. The fair value measurement uses our unit price as a significant input in the determination of the fair value and thus represents a Level 2 measurement as defined by ASC 820. For the six months ended June 30, 2014, the Partnership issued 41,996 of paid-in-kind Series B Units with a fair value of $1.1 million.
	Equity Offering
	On January 29, 2014, the Partnership and certain of its affiliates entered into an underwriting agreement (the “Underwriting Agreement”) with Barclays Capital Inc. and UBS Securities LLC (the “Underwriters”), providing for the issuance and sale by the Partnership, and the purchase by the Underwriter, of 3,400,000 common units representing limited partner interests in the Partnership at a price to the public of $26.75 per common unit. The Partnership used the net proceeds of $86.9 million to fund a portion of the Lavaca Acquisition.
	General Partner Units
	In connection with our equity offering, we received proceeds of $1.3 million from our General Partner as consideration for 49,678 additional general partner units.
	Issuance and Exercise of Warrant
	Effective February 5, 2014, we issued to our General Partner a warrant to purchase up to 300,000 common units of the Partnership at an exercise price of $0.01 per common unit (the “Warrant”). The Warrant was exercised on February 21, 2014, resulting in the issuance of approximately 300,000 common units. The value of the Warrant of $7.2 million was determined based on the close price of $23.89 of the common units on the exercise date.
	The numbers of units outstanding as of June 30, 2014 and December 31, 2013, respectively, were as follows (in thousands):
		June 30,			December 31,
		2014			2013
	Series A convertible preferred units	5,430			5,279
	Series B convertible units	1,210			—
	Limited partner common units	11,140			7,414
	General partners units	235			185
	Distributions
	We made cash distributions of $5.8 million and $11.1 million, inclusive of distributions of $0.5 million and $0.9 million in respect of our General Partner’s incentive distribution rights, in the three and six months ended June 30, 2014, respectively. We made distributions of $3.7 million and $7.8 million in the three and six months ended June 30, 2013, respectively. We made no distributions in respect of our General Partner's incentive distribution rights in the six months ended June 30, 2013. We depend on our credit facility for future capital needs and may use it to fund a portion of cash distributions to unitholders, as necessary, depending on the level of our operating cashflow.
	The Partnership executed an amendment to the Partnership agreement, which became effective August 4, 2014, related to its outstanding Series A Units. As a result of the Amendment, distributions on Series A units will be made with paid-in-kind Series A units, cash or a combination thereof, at the discretion of the Board of Directors, beginning with the distribution for the three months ended June 30, 2014 and the subsequent three fiscal quarters. Prior to the Amendment, the Partnership was required to pay distributions on the Series A units with a combination of paid-in-kind units and cash. For the Series A Unit distributions as of June 30, 2014, we have accrued $3.9 million for the paid-in-kind Series A Units. The distributions will be made in the third quarter of 2014.
	Net Income (Loss) attributable to Limited Partner Units
	Net income (loss) is allocated to the General Partner and the limited partners in accordance with their respective ownership percentages, after giving effect to contractual distributions on Series A preferred convertible units, declared distributions on the Series B Units, limited partner and to the general partner units, including incentive distribution rights. Basic and diluted net income (loss) per limited partner unit is calculated by dividing limited partners’ interest in net income (loss) by the weighted average number of outstanding limited partner units during the period.
	We compute earnings per unit using the two-class method. The two-class method requires that securities that meet the definition of a participating security be considered for inclusion in the computation of basic earnings per unit. Under the two-class method, earnings per unit is calculated as if all of the earnings for the period were distributed under the terms of the partnership agreement, regardless of whether the General Partner has discretion over the amount of distributions to be made in any particular period, whether those earnings would actually be distributed during a particular period from an economic or practical perspective, or whether the General Partner has other legal or contractual limitations on its ability to pay distributions that would prevent it from distributing all of the earnings for a particular period.
	The two-class method does not impact our overall net income (loss) or other financial results; however, in periods in which aggregate net income exceeds our aggregate distributions for such period, it will have the impact of reducing net income (loss) per limited partner unit. This result occurs as a larger portion of our aggregate earnings, as if distributed, is allocated to the incentive distribution rights of the General Partner, even though we make distributions on the basis of available cash and not earnings. In periods in which our aggregate net income does not exceed our aggregate distributions for such period, the two-class method does not have any impact on our calculation of earnings per limited partner unit. We have no dilutive securities, therefore basic and diluted net income per unit are the same.
	We determined basic and diluted net income (loss) per limited partner unit as follows, (in thousands, except per unit amounts):
		Three months ended June 30,							Six months ended June 30,
		2014				2013			2014			2013
	Net loss from continuing operations	$	(1,095	)		$	(20,057	)	$	(537	)	$	(23,449	)
	Less: Net income attributable to noncontrolling interests	66				188			174			343
	Net loss from continuing operations attributable to the Partnership	(1,161		)		(20,245		)	(711		)	(23,792		)
	Less:
	Contractual distributions on Series A Units	3,917				17,760			7,098			17,760
	Declared distributions on Series B Units	560				—			1,052			—
	General partner's distribution	603				80			1,085			160
	General partner's share in undistributed loss	(149		)		(1,236		)	(262		)	(1,386		)
	Net loss from continuing operations available to limited partners	(6,092		)		(36,849		)	(9,684		)	(40,326		)
	Net loss from operations of disposal groups, net of tax, available to limited partners	(499		)		(1,846		)	(549		)	(1,710		)
	Net loss available to limited partners	$	(6,591	)		$	(38,695	)	$	(10,233	)	$	(42,036	)
	Weighted average number of units used in computation of limited partners’ net (loss) income per unit (basic and diluted)	11,139				9,198			10,496			9,183
	Limited partners' net loss per common unit
	Basic and diluted:
	Loss from continuing operations	$	(0.55	)		$	(4.01	)	$	(0.92	)	$	(4.39	)
	Loss from discontinued operations	(0.04		)		(0.20		)	(0.05		)	(0.19		)
	Net loss	$	(0.59	)		$	(4.21	)	$	(0.97	)	$	(4.58	)

LongTerm_Incentive_Plan

Long-Term Incentive Plan	6 Months Ended
	Jun. 30, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]	'
Long-Term Incentive Plan	'
	Long-Term Incentive Plan
	Our General Partner manages our operations and activities and employs the personnel who provide support to our operations. The board of directors of our General Partner provides a long-term incentive plan (“LTIP”) for its employees, consultants and directors who perform services for it or its affiliates. At June 30, 2014 and December 31, 2013, 685,492 and 855,089 units, respectively, were available for future grant under the LTIP.
	Ownership in the awards is subject to forfeiture until the vesting date. The LTIP is administered by the board of directors of our General Partner which, at its discretion, may elect to settle such vested phantom units with a number of units equivalent to the fair market value at the date of vesting in lieu of cash. Although our General Partner has the option to settle in cash upon the vesting of phantom units, it does not currently intend to settle these awards in cash. Although other types of awards are contemplated under the LTIP, all currently outstanding awards are phantom units without distribution equivalent rights.
	Generally, grants issued under the LTIP vest in increments of 25% on each of the first four anniversary dates of the date of the grant and do not contain any other restrictive conditions related to vesting other than continued employment.
	The following table summarizes the change in our unit-based awards during the six months ended June 30, 2014 indicated, in units:
		Six months ended June 30, 2014
		Shares		Weighted-Average Exercise Price
	Outstanding at beginning of period	75,529		17.62
	Granted	180,791		20.56
	Forfeited	(5,135	)	20.13
	Vested	(31,829	)	19.34
	Outstanding at end of period	219,356		19.73
	The fair value of our phantom units, which are subject to equity classification, is based on the fair value of our units at the grant date. Compensation costs related to these awards, including amortization, for the three months ended June 30, 2014 and 2013 were $0.4 million and $1.1 million, respectively, and for the six months ended June 30, 2014 and 2013 were $0.8 million and $1.5 million, respectively, which are classified as equity compensation expense in the condensed consolidated statements of operations and the non-cash portion in partners’ capital on the condensed consolidated balance sheets.
	The total fair value of vested units at the time of vesting was $0.8 million and $1.1 million for the six months ended June 30, 2014 and 2013, respectively.
	The total compensation cost related to unvested awards not yet recognized at June 30, 2014 and 2013 was $3.8 million and $1.1 million, respectively, and the weighted average period over which this cost is expected to be recognized as of June 30, 2014 is approximately 3.4 years.

Income_Tax_Notes

Income Tax (Notes)	6 Months Ended
	Jun. 30, 2014
Income Tax Disclosure [Abstract]	'
Income Tax Disclosure [Text Block]	'
	Income Taxes
	The Partnership is not a taxable entity for U.S. federal income tax purposes or for the majority of states that impose an income tax. Taxes on our net income generally are borne by our unitholders through the allocation of taxable income. However, one of our subsidiaries, Blackwater, is a taxable entity. Partnership income tax expense for the three and six months ended June 30, 2014 was $0.1 million and $0.1 million, respectively, resulting in an effective tax rate of 15.8% and 34.6%, respectively. For the three and six months ended June 30, 2013, Partnership income tax was a benefit of $0.4 million, resulting in an effective tax rate of 1.8% and 1.6%, respectively.
	The effective tax rates for the three and six months ended June 30, 2014 and June 30, 2013, differ from the statutory rate primarily due to Partnership income and loss that is not subject to U. S. federal income taxes, as well as transactions between the Partnership and its taxable subsidiary that generate tax deductions for the taxable subsidiary and are eliminated in the consolidation of Net loss before income tax benefit.

Commitments_and_Contingencies

Commitments and Contingencies	6 Months Ended
	Jun. 30, 2014
Commitments and Contingencies Disclosure [Abstract]	'
Commitments and Contingencies Disclosure [Text Block]	'
	Commitments and Contingencies
	Resolution of legal matter
	In January 2009, Rigolets Limited Partnership (“Rigolets”) filed suit for damages alleging failure to maintain a right-of-way along our Gloria System. Following negotiations, we expect to enter into an agreement with Rigolets during the third quarter of 2014 for the procurement of additional needed pipeline right-of-way and permits in order to rebuild sections of the levees and dams which will provide additional protection to portions of our Gloria System. We expect to incur up to $1.8 million of capital expenditures over the next twelve months in connection with this rebuilding.
	Legal proceedings
	On September 5, 2013, HPIP, our General Partner and the Partnership were named as defendants in an action filed by AIM challenging the Equity Restructuring. AIM Midstream Holdings, LLC v. High Point Infrastructure Partners, LLC, American Midstream GP, LLC and American Midstream Partners, LP (Civil Action No. 8803-VCP) was filed in the Court of Chancery of the State of Delaware. Among claims against the other parties to the litigation, the action asserts a claim of tortious interference with contract against the Partnership and sought either rescission of the Partnership's equity restructuring agreement executed on August 9, 2013 or, in the alternative, monetary damages.
	On February 5, 2014, we, HPIP and our General Partner entered into a settlement (the “Settlement”) with AIM Midstream Holdings regarding the action filed in Delaware Chancery Court by AIM Midstream Holdings. Under the Settlement, among other things:
	•	HPIP and AIM Midstream Holdings amended the LLC Amendment to, among other things, amend the Sharing Percentages (as defined therein) such that HPIP’s sharing percentage thereafter is 95% and AIM Midstream Holdings’s Sharing Percentage is 5%;
	•	HPIP transferred all of the 85.02% of our outstanding new IDRs held by HPIP to our General Partner such that our General Partner owns 100% of the outstanding new IDRs; and
	•	We issued to AIM Midstream Holdings a warrant to purchase up to 300,000 common units of the Partnership at an exercise price of $0.01 per common unit, which Warrant, among other terms, i) was exercisable at any time on or after February 8, 2014 until the tenth anniversary of February 5, 2014, ii) contained cashless exercise provisions and iii) contains customary anti-dilution and other protections. The Warrant was exercised on February 21, 2014.
	Environmental matters
	We are subject to federal and state laws and regulations relating to the protection of the environment. Environmental risk is inherent to natural gas pipeline and processing operations, and we could, at times, be subject to environmental cleanup and enforcement actions. We attempt to manage this environmental risk through appropriate environmental policies and practices to minimize any impact our operations may have on the environment.

RelatedParty_Transactions

Related-Party Transactions	6 Months Ended
	Jun. 30, 2014
Related Party Transactions [Abstract]	'
Related-Party Transactions	'
	Related-Party Transactions
	Employees of our General Partner are assigned to work for us. Where directly attributable, the costs of all compensation, benefits expenses and employer expenses for these employees are charged directly by our General Partner to American Midstream, LLC, which, in turn, charges the appropriate subsidiary. Our General Partner does not record any profit or margin for the administrative and operational services charged to us. During the three and six months ended June 30, 2014, administrative and operational services expenses of $5.1 million and $10.1 million, respectively, were charged to us by our General Partner. During the three and six months ended June 30, 2013, administrative and operational services expenses of $3.8 million and $6.3 million, respectively, were charged to us by our General Partner. For the three and six months ended June 30, 2014, we incurred approximately $0.2 million and $0.7 million, respectively, of costs primarily associated with certain business development activities led by an affiliate of our General Partner. For the three and six months ended June 30, 2013, we incurred approximately $0.2 million and $0.5 million, respectively, of costs primarily associated with certain business development activities led by an affiliate of our General Partner. We expect to be reimbursed by this affiliate of our General Partner for the business development costs related to those projects.
	During the current quarter, the Partnership and an affiliate of its General Partner entered into a Management Service Fee arrangement under which the affiliate pays a monthly fee to reimburse the Partnership for administrative expenses incurred on the affiliate's behalf. During the three months ended June 30, 2014, the Partnership recognized $0.2 million in management fee income that has been recorded as a reduction to Selling, general and administrative expenses.

Reporting_Segments

Reporting Segments	6 Months Ended
	Jun. 30, 2014
Segment Reporting [Abstract]	'
Reporting Segments	'
	Reporting Segments
	Our operations are located in the United States and are organized into three reporting segments: (1) Gathering and Processing, (2) Transmission and (3) Terminals.
	Gathering and Processing
	Our Gathering and Processing segment provides “wellhead-to-market” services to producers of natural gas and oil, which include transporting raw natural gas from various receipt points through gathering systems, treating the raw natural gas, processing raw natural gas to separate the NGLs from the natural gas, fractionating NGLs, and selling or delivering pipeline-quality natural gas as well as NGLs to various markets and pipeline systems.
	Transmission
	Our Transmission segment transports and delivers natural gas from producing wells, receipt points or pipeline interconnects for shippers and other customers, which include local distribution companies (“LDCs”), utilities and industrial, commercial and power generation customers.
	Terminals
	Our Terminals segment provides above-ground storage services at our marine terminals that support various commercial customers, including commodity brokers, refiners and chemical manufacturers to store a range of products, including crude oil, bunker fuel, distillates, chemicals and agricultural products.
	These segments are monitored separately by management for performance and are consistent with internal financial reporting. These segments have been identified based on the differing products and services, regulatory environment and the expertise required for these operations. Gross margin is a performance measure utilized by management to monitor the business of each segment.
	The following tables set forth our segment information for the three and six months ended June 30, 2014 and 2013 (in thousands):
		Three months ended June 30, 2014
		Gathering			Transmission		Terminals		Total
		and
		Processing
	Revenue	$	50,015		$	23,960	$	3,898	$	77,873
	Loss on commodity derivatives, net	(193		)	—		—		(193		)
	Total revenue	49,822			23,960		3,898		77,680
	Operating expenses:
	Purchases of natural gas, NGL's and condensate	39,238			14,580		—		53,818
	Direct operating expenses	5,746			3,736		1,562		11,044
	Selling, general and administrative expenses								5,637
	Equity compensation expense								435
	Depreciation, amortization and accretion expense								6,012
	Total operating expenses								76,946
	Interest expense								(1,680		)
	Income tax benefit								(149		)
	Loss from operations of disposal groups, net of tax								(506		)
	Net income								(1,601		)
	Less: Net income attributable to non-controlling interests								66
	Net income attributable to the Partnership								$	(1,667	)
	Segment gross margin (a)	$	10,481		$	9,350	$	2,336	$	22,167
		Three months ended June 30, 2013
		Gathering			Transmission		Terminals		Total
		and
		Processing
	Revenue	$	52,525		$	20,886	$	2,866	$	76,277
	Gain on commodity derivatives, net	914			—		—		914
	Total revenue	53,439			20,886		2,866		77,191
	Operating expenses:
	Purchases of natural gas, NGL's and condensate	43,702			13,263		—		56,965
	Direct operating expenses	3,637			3,556		1,209		8,402
	Selling, general and administrative expenses								4,588
	Equity compensation expense								1,097
	Depreciation, amortization and accretion expense								8,748
	Total operating expenses								79,800
	Loss on impairment of property, plant and equipment								(15,232		)
	Interest expense								(2,591		)
	Income tax benefit								375
	Loss from operations of disposal groups, net of tax								(1,869		)
	Net loss								(21,926		)
	Less: Net income attributable to non-controlling interests								188
	Net loss attributable to the Partnership								$	(22,114	)
	Segment gross margin (a)	$	9,077		$	7,583	$	1,657	$	18,317
		Six months ended June 30, 2014
		Gathering			Transmission		Terminals		Total
		and
		Processing
	Revenue	$	101,641		$	49,088	$	7,512	$	158,241
	Loss on commodity derivatives, net	(323		)	—		—		(323		)
	Total revenue	101,318			49,088		7,512		157,918
	Operating expenses:
	Purchases of natural gas, NGL's and condensate	80,359			28,680		—		109,039
	Direct operating expenses	9,914			6,854		3,237		20,005
Selling, general and administrative expenses								11,230
Equity compensation expense								795
Depreciation, amortization and accretion expense								13,644
Total operating expenses								154,713
Loss on sale of assets, net								(21		)
Interest expense								(3,583		)
Income tax benefit								(138		)
Loss from operations of disposal groups, net of tax								(556		)
Net income								(1,093		)
Less: Net income attributable to non-controlling interests								174
Net income attributable to the Partnership								$	(1,267	)
Segment gross margin (a)	$	20,610		$	20,363	$	4,275	$	45,248
	Six months ended June 30, 2013
	Gathering			Transmission		Terminals		Total
	and
	Processing
Revenue	$	100,766		$	35,549	$	2,866	$	139,181
Loss on commodity derivatives, net	609			—		—		609
Total revenue	101,375			35,549		2,866		139,790
Operating expenses:
Purchases of natural gas, NGL's and condensate	83,370			23,864		—		107,234
Direct operating expenses	7,127			4,941		1,209		13,277
Selling, general and administrative expenses								8,013
Equity compensation expense								1,485
Depreciation, amortization and accretion expense								14,394
Total operating expenses								144,403
Gain on involuntary conversion of property, plant and equipment								343
Loss on impairment of property, plant and equipment								(15,232		)
Interest expense								(4,322		)
Income tax benefit								375
Loss from operations of disposal groups, net of tax								(1,875		)
Net loss								(25,324		)
Less: Net income attributable to non-controlling interests								343
Net loss attributable to the Partnership								$	(25,667	)
Segment gross margin (a)	$	17,784		$	11,581	$	1,657	$	31,022
(a)	Segment gross margin for our Gathering and Processing segment consists of revenue less purchases of natural gas, NGLs and condensate and revenue from construction, operating and maintenance agreements (“COMA”). Segment gross margin for our Transmission segment consists of revenue, less purchases of natural gas and COMA. Segment gross margin for our Terminals segment consists of revenue, less direct operating expenses. Gross margin consists of the sum of the segment gross margin amounts for each of these segments. As an indicator of our operating performance, gross margin should not be considered an alternative to, or more meaningful than, net income or cash flow from operations as determined in accordance with GAAP. Our gross margin may not be comparable to a similarly titled measure of another company because other entities may not calculate gross margin in the same manner.
Asset information, including capital expenditures, by segment is not included in reports used by our management in their monitoring of performance and therefore is not disclosed.

Subsidiary_Guarantors_Subsidia

Subsidiary Guarantors Subsidiary Guarantors (Notes)	6 Months Ended
	Jun. 30, 2014
Subsidiary Guarantors [Abstract]	'
Condensed Financial Information of Parent Company Only Disclosure [Text Block]	'
	Subsidiary Guarantors
	The subsidiaries of the Partnership (the "Subsidiaries") are co-registrants with the Partnership, and the registration statement registers guarantees of debt securities by one or more of the Subsidiaries (other than American Midstream Finance Corporation, a 100% owned subsidiary of the Partnership whose sole purpose is to act as co-issuer of such debt securities). The financial position and operations of the co-issuer are minor and therefore have been included with the Parent's financial information. As of June 30, 2012, the Subsidiaries were 100% owned by the Partnership and any guarantees by the Subsidiaries will be full and unconditional. As of June 30, 2014, the Subsidiaries have an investment in the non-guarantor subsidiaries equal to a 92.2% undivided interest in its Chatom System. The Partnership has no assets or operations independent of the Subsidiaries, and there are no significant restrictions upon the ability of the Subsidiaries to distribute funds to the Partnership. In the event that more than one of the Subsidiaries provide guarantees of any debt securities issued by the Partnership, such guarantees will constitute joint and several obligations. None of the assets of the Partnership or the Subsidiaries represent restricted net assets pursuant to Rule 4-08(e)(3) of Regulation S-X under the Securities Act of 1933, as amended. For purposes of the following condensed consolidating financial information, the Partnership's investments in its Subsidiaries and the guarantor subsidiaries' investment in its 92.2% undivided interest in the Chatom System are presented in accordance with the equity method of accounting. The financial information may not necessarily be indicative of the financial position, results of operations, or cash flows had the subsidiary guarantors operated as independent entities. Condensed consolidating financial information for the Partnership, its combined guarantor subsidiaries and non-guarantor subsidiary as of June 30, 2014 and 2013, and for those three and six months ended is as follows (in thousands):
		Condensed Consolidating Balance Sheet
		30-Jun-14
		Parent			Guarantor Subsidiaries			Non-Guarantor Subsidiary			Consolidating Adjustments			Consolidated
	Assets
	Current assets
	Cash and cash equivalents	$	1		$	3,006		$	—		$	—		$	3,007
	Accounts receivable	—			4,329			3,008			—			7,337
	Unbilled revenue	—			21,991			3,211			—			25,202
	Risk management assets	—			885			—			—			885
	Other current assets	—			5,590			406			—			5,996
	Current assets held for sale	—			121			—			—			121
	Total current assets	1			35,922			6,625			—			42,548
	Property, plant and equipment, net	—			324,347			56,971			—			381,318
	Note receivable	27,315			—			—			(27,315		)	—
	Goodwill	—			16,253			—			—			16,253
	Intangible assets, net	—			49,522			—			—			49,522
	Other assets, net	—			7,714			704			—			8,418
	Noncurrent assets held for sale, net	—			1,148			—			—			1,148
	Investment in subsidiaries	246,550			56,815			—			(303,365		)	—
	Total assets	$	273,866		$	491,721		$	64,300		$	(330,680	)	$	499,207
	Liabilities, Equity and Partners’ Capital
	Current liabilities
	Accounts payable	$	34		$	10,150		$	354		$	—		$	10,538
	Accrued gas purchases	—			15,204			2,052			—			17,256
	Accrued expenses and other current liabilities	—			15,644			53			—			15,697
	Current portion of long-term debt	—			574			—			—			574
	Risk management liabilities	—			602			—			—			602
	Current liabilities held for sale	—			54			—			—			54
	Total current liabilities	34			42,228			2,459			—			44,721
	Risk management liabilities - long-term	—			36			—			—			36
	Asset retirement obligations	—			34,169			479			—			34,648
	Other liabilities	—			229			—			—			229
	Long-term debt	—			163,815			—			(27,315		)	136,500
	Deferred tax liability	—			4,694			—			—			4,694
	Noncurrent liabilities held for sale, net	—			—			—			—			—
	Total liabilities	34			245,171			2,938			(27,315		)	220,828
	Convertible preferred units
	Series A convertible preferred units	100,571			—			—			—			100,571
	Total partners’ capital	173,261			246,550			56,815			(303,365		)	173,261
	Noncontrolling interests	—			—			4,547			—			4,547
	Total equity and partners' capital	173,261			246,550			61,362			(303,365		)	177,808
	Total liabilities, equity and partners' capital	$	273,866		$	491,721		$	64,300		$	(330,680	)	$	499,207
		Condensed Consolidating Balance Sheet
		31-Dec-13
		Parent			Guarantor Subsidiaries			Non-Guarantor Subsidiary			Consolidating Adjustments			Consolidated
	Assets
	Current assets
	Cash and cash equivalents	$	1		$	392		$	—		$	—		$	393
	Accounts receivable	—			4,461			2,361			—			6,822
	Unbilled revenue	—			18,321			4,680			—			23,001
	Risk management assets	—			473			—			—			473
	Other current assets	84			6,942			555			(84		)	7,497
	Current assets held for sale	—			272			—			—			272
	Total current assets	85			30,861			7,596			(84		)	38,458
	Risk management assets, long-term	—			—			—			—			—
	Property, plant and equipment, net	—			254,656			58,045			—			312,701
	Note receivable	27,315			—			—			(27,315		)	—
	Goodwill	—			16,447			—			—			16,447
	Intangible assets, net	—			3,682			—			—			3,682
	Other assets, net	—			8,321			743			—			9,064
	Noncurrent assets held for sale, net	—			1,723			—			—			1,723
Investment in subsidiaries	142,758			57,750			—			(200,508		)	—
Total assets	$	170,158		$	373,440		$	66,384		$	(227,907	)	$	382,075
Liabilities, Equity and Partners’ Capital
Current liabilities
Accounts payable	$	30		$	2,902		$	329		$	—		$	3,261
Accrued gas purchases	—			14,282			3,104			—			17,386
Accrued expenses and other current liabilities	1,478			13,563			101			(84		)	15,058
Current portion of long-term debt	—			2,048			—			—			2,048
Risk management liabilities	—			423			—			—			423
Current liabilities held for sale	—			114			—			—			114
Total current liabilities	1,508			33,332			3,534			(84		)	38,290
Risk management liabilities - long-term	—			101			—			—			101
Asset retirement obligations	—			34,164			472			—			34,636
Other liabilities	—			191			—			—			191
Long-term debt	—			158,050			—			(27,315		)	130,735
Deferred tax liability	—			4,749			—			—			4,749
Noncurrent liabilities held for sale, net	—			95			—			—			95
Total liabilities	1,508			230,682			4,006			(27,399		)	208,797
Convertible preferred units
Series A convertible preferred units	94,811			—			—			—			94,811
Total partners’ capital	73,839			142,758			57,750			(200,508		)	73,839
Noncontrolling interests	—			—			4,628			—			4,628
Total equity and partners' capital	73,839			142,758			62,378			(200,508		)	78,467
Total liabilities, equity and partners' capital	$	170,158		$	373,440		$	66,384		$	(227,907	)	$	382,075
	Condensed Consolidating Statements of Operations
	Three months ended June 30, 2014
	Parent			Guarantor Subsidiaries			Non-Guarantor Subsidiary			Consolidating Adjustments			Consolidated
Revenue	$	—		$	67,724		$	12,493		$	(2,344	)	$	77,873
Loss on commodity derivatives, net	—			(130		)	(63		)	—			(193		)
Total revenue	—			67,594			12,430			(2,344		)	77,680
Operating expenses:
Purchases of natural gas, NGLs and condensate	—			46,142			10,020			(2,344		)	53,818
Direct operating expenses	—			9,901			1,143			—			11,044
Selling, general and administrative expenses	—			5,637			—			—			5,637
Equity compensation expense	—			435			—			—			435
Depreciation and accretion expense	—			5,587			425			—			6,012
Total operating expenses	—			67,702			11,588			(2,344		)	76,946
Operating income	—			(108		)	842			—			734
Earnings from consolidated affiliate	(2,331		)	776			—			1,555			—
Interest income (expense)	664			(2,344		)	—			—			(1,680		)
Net loss before income tax benefit	(1,667		)	(1,676		)	842			1,555			(946		)
Income tax benefit	—			(149		)	—			—			(149		)
Net loss from continuing operations	(1,667		)	(1,825		)	842			1,555			(1,095		)
Loss from operations of disposal groups, net of tax	—			(506		)	—			—			(506		)
Net income	(1,667		)	(2,331		)	842			1,555			(1,601		)
Net income attributable to noncontrolling interests	—			—			66			—			66
Net loss attributable to the Partnership	$	(1,667	)	$	(2,331	)	$	776		$	1,555		$	(1,667	)
	Condensed Consolidating Statements of Operations
	Three months ended June 30, 2013
	Parent			Guarantor Subsidiaries			Non-Guarantor Subsidiary			Consolidating Adjustments			Consolidated
Revenue	$	—		$	64,178		$	13,607		$	(1,508	)	$	76,277
Gain on commodity derivatives, net	—			914			—			—			914
Total revenue	—			65,092			13,607			(1,508		)	77,191
Operating expenses:
Purchases of natural gas, NGLs and condensate	—			47,902			10,571			(1,508		)	56,965
Direct operating expenses	—			7,285			1,117			—			8,402
Selling, general and administrative expenses	—			4,588			—			—			4,588
Equity compensation expense	—			1,097			—			—			1,097
Depreciation and accretion expense	—			8,334			414			—			8,748
Total operating expenses	—			69,206			12,102			(1,508		)	79,800
Loss on impairment of property, plant and equipment	—			(15,232		)	—			—			(15,232		)
Operating (loss) income	—			(19,346		)	1,505			—			(17,841		)
(Loss) earnings from consolidated affiliate	(22,114		)	1,317			—			20,797			—
Interest expense	—			(2,591		)	—			—			(2,591		)
Net (loss) income before income tax benefit	(22,114		)	(20,620		)	1,505			20,797			(20,432		)
Income tax benefit	—			375			—			—			375
Net (loss) income from continuing operations	(22,114		)	(20,245		)	1,505			20,797			(20,057		)
Income from operations of disposal groups, net of tax	—			(1,869		)	—			—			(1,869		)
Net (loss) income	(22,114		)	(22,114		)	1,505			20,797			(21,926		)
Net income attributable to noncontrolling interests	—			—			188			—			188
Net (loss) income attributable to the Partnership	$	(22,114	)	$	(22,114	)	$	1,317		$	20,797		$	(22,114	)
	Condensed Consolidating Statements of Operations
	Six months ended June 30, 2014
	Parent			Guarantor Subsidiaries			Non-Guarantor Subsidiary			Consolidating Adjustments			Consolidated
Revenue	$	—		$	139,343		$	24,060		$	(5,162	)	$	158,241
Loss on commodity derivatives, net	—			(233		)	(90		)	—			(323		)
Total revenue	—			139,110			23,970			(5,162		)	157,918
Operating expenses:
Purchases of natural gas, NGLs and condensate	—			95,014			19,187			(5,162		)	109,039
Direct operating expenses	—			17,840			2,165			—			20,005
Selling, general and administrative expenses	—			11,230			—			—			11,230
Equity compensation expense	—			795			—			—			795
Depreciation and accretion expense	—			12,799			845			—			13,644
Total operating expenses	—			137,678			22,197			(5,162		)	154,713
Gain on sale of assets, net	—			(21		)	—			—			(21		)
Operating (loss) income	—			1,411			1,773			—			3,184
(Loss) earnings from consolidated affiliate	(2,512		)	1,599			—			913			—
Interest income (expense)	1,245			(4,828		)	—			—			(3,583		)
Net (loss) income before income tax benefit	(1,267		)	(1,818		)	1,773			913			(399		)
Income tax benefit	—			(138		)	—			—			(138		)
Net (loss) income from continuing operations	(1,267		)	(1,956		)	1,773			913			(537		)
Income from operations of disposal groups, net of tax	—			(556		)	—			—			(556		)
Net (loss) income	(1,267		)	(2,512		)	1,773			913			(1,093		)
Net income attributable to noncontrolling interests	—			—			174			—			174
Net (loss) income attributable to the Partnership	$	(1,267	)	$	(2,512	)	$	1,599		$	913		$	(1,267	)
	Condensed Consolidating Statements of Operations
	Six months ended June 30, 2013
	Parent			Guarantor Subsidiaries			Non-Guarantor Subsidiary			Consolidating Adjustments			Consolidated
Revenue	$	—		$	115,396		$	27,256		$	(3,471	)	$	139,181
Gain on commodity derivatives, net	—			609			—			—			609
Total revenue	—			116,005			27,256			(3,471		)	139,790
Operating expenses:
Purchases of natural gas, NGLs and condensate	—			89,216			21,489			(3,471		)	107,234
Direct operating expenses	—			11,074			2,203			—			13,277
Selling, general and administrative expenses	—			8,013			—			—			8,013
Equity compensation expense	—			1,485			—			—			1,485
Depreciation and accretion expense	—			13,566			828			—			14,394
Total operating expenses	—			123,354			24,520			(3,471		)	144,403
Gain on involuntary conversion of property, plant and equipment	—			343			—			—			343
Loss on impairment of property, plant and equipment	—			(15,232		)	—			—			(15,232		)
Operating (loss) income	—			(22,238		)	2,736			—			(19,502		)
(Loss) earnings from consolidated affiliate	(25,667		)	2,393			—			23,274			—
Interest expense	—			(4,322		)	—			—			(4,322		)
Net (loss) income before income tax benefit	(25,667		)	(24,167		)	2,736			23,274			(23,824		)
Income tax benefit	—			375			—			—			375
Net (loss) income from continuing operations	(25,667		)	(23,792		)	2,736			23,274			(23,449		)
Income from operations of disposal groups, net of tax	—			(1,875		)	—			—			(1,875		)
Net (loss) income	(25,667		)	(25,667		)	2,736			23,274			(25,324		)
Net income attributable to noncontrolling interests	—			—			343			—			343
Net (loss) income attributable to the Partnership	$	(25,667	)	$	(25,667	)	$	2,393		$	23,274		$	(25,667	)
	Condensed Consolidating Statements of Comprehensive Income
	Three months ended June 30, 2014
	Parent			Guarantor Subsidiaries			Non-Guarantor Subsidiary			Consolidating Adjustments			Consolidated
Net income	$	(1,667	)	$	(2,331	)	$	842		$	1,555		$	(1,601	)
Unrealized gain on post retirement benefit plan assets and liabilities	10			10			—			(10		)	10
Comprehensive income	(1,657		)	(2,321		)	842			1,545			(1,591		)
Less: Comprehensive income attributable to noncontrolling interests	—			—			66			—			66
Comprehensive income attributable to the Partnership	$	(1,657	)	$	(2,321	)	$	776		$	1,545		$	(1,657	)
	Condensed Consolidating Statements of Comprehensive Income
	Three months ended June 30, 2013
	Parent			Guarantor Subsidiaries			Non-Guarantor Subsidiary			Consolidating Adjustments			Consolidated
Net (loss) income	$	(22,114	)	$	(22,114	)	$	1,505		$	20,797		$	(21,926	)
Unrealized loss on post retirement benefit plan assets and liabilities	(43		)	(43		)	—			43			(43		)
Comprehensive (loss) income	(22,157		)	(22,157		)	1,505			20,840			(21,969		)
Less: Comprehensive income attributable to noncontrolling interests	—			—			188			—			188
Comprehensive (loss) income attributable to the Partnership	$	(22,157	)	$	(22,157	)	$	1,317		$	20,840		$	(22,157	)
	Condensed Consolidating Statements of Comprehensive Income
	Six months ended June 30, 2014
	Parent			Guarantor Subsidiaries			Non-Guarantor Subsidiary			Consolidating Adjustments			Consolidated
Net (loss) income	$	(1,267	)	$	(2,512	)	$	1,773		$	913		$	(1,093	)
Unrealized loss on post retirement benefit plan assets and liabilities	46			46			—			(46		)	46
Comprehensive (loss) income	(1,221		)	(2,466		)	1,773			867			(1,047		)
Less: Comprehensive income attributable to noncontrolling interests	—			—			174			—			174
Comprehensive (loss) income attributable to the Partnership	$	(1,221	)	$	(2,466	)	$	1,599		$	867		$	(1,221	)
	Condensed Consolidating Statements of Comprehensive Income
	Six months ended June 30, 2013
	Parent			Guarantor Subsidiaries			Non-Guarantor Subsidiary			Consolidating Adjustments			Consolidated
Net (loss) income	$	(25,667	)	$	(25,667	)	$	2,736		$	23,274		$	(25,324	)
Unrealized loss on post retirement benefit plan assets and liabilities	(56		)	(56		)	—			56			(56		)
Comprehensive (loss) income	(25,723		)	(25,723		)	2,736			23,330			(25,380		)
Less: Comprehensive income attributable to noncontrolling interests	—			—			343			—			343
Comprehensive (loss) income attributable to the Partnership	$	(25,723	)	$	(25,723	)	$	2,393		$	23,330		$	(25,723	)
	Condensed Consolidating Statements of Cash Flows
	Six months ended June 30, 2014
	Parent			Guarantor Subsidiaries			Non-Guarantor Subsidiary			Consolidating Adjustments			Consolidated
Net cash provided by operating activities	$	—		$	9,850		$	2,561		$	—		$	12,411
Cash flows from investing activities
Cost of acquisitions, net of cash acquired	—			(110,909		)	—			—			(110,909		)
Additions to property, plant and equipment	—			(13,458		)	229			—			(13,229		)
Proceeds from disposals of property, plant and equipment	—			6,202			—			—			6,202
Net contributions from affiliates	13,793			—			—			(13,793		)	—
Net distributions to affiliates	(118,180		)	—			—			118,180			—
Net cash (used in) provided by financing activities	(104,387		)	(118,165		)	229			104,387			(117,936		)
Cash flows from financing activities
Net contributions from affiliates	—			118,180			—			(118,180		)	—
Net distributions to affiliates	—			(11,228		)	(2,565		)	13,793			—
Proceeds from issuance of common units to public, net of offering costs	86,904			—			—			—			86,904
Unit holder contributions	1,276			—			—			—			1,276
Unit holder distributions	(13,793		)	—			—			—			(13,793		)
Issuance of Series B Units	30,000			—			—			—			30,000
Acquisition of noncontrolling interest	—			(8		)	—			—			(8		)
Net distributions to noncontrolling interest owners	—			(1		)	(225		)	—			(226		)
LTIP tax netting unit repurchase	—			(151		)	—			—			(151		)
Deferred debt issuance costs	—			(154		)	—			—			(154		)
Payments on other debt	—			(1,644		)	—			—			(1,644		)
Borrowings on other debt	—			170			—			—			170
Payments on long-term debt	—			(75,220		)	—			—			(75,220		)
Borrowings on long-term debt	—			80,985			—			—			80,985
Net cash provided by (used in) financing activities	104,387			110,929			(2,790		)	(104,387		)	108,139
Net increase in cash and cash equivalents	—			2,614			—			—			2,614
Cash and cash equivalents
Beginning of period	1			392			—			—			393
End of period	$	1		$	3,006		$	—		$	—		$	3,007
Supplemental cash flow information
Interest payments, net	$	—		$	2,718		$	—		$	—		$	2,718
Supplemental non-cash information
Increase in accrued property, plant and equipment	$	—		$	9,501		$	—		$	—		$	9,501
Accrued unitholder distribution for Series A Units	$	5,760		$	—		$	—		$	—		$	5,760
In-kind unitholder distribution for Series B Units	$	1,052		$	—		$	—		$	—		$	1,052
	Condensed Consolidating Statements of Cash Flows
	Six months ended June 30, 2013
	Parent			Guarantor Subsidiaries			Non-Guarantor Subsidiary			Consolidating Adjustments			Consolidated
Net cash provided by operating activities	$	—		$	9,682		$	2,736		$	—		$	12,418
Cash flows from investing activities
Additions to property, plant and equipment	—			(13,605		)	(1		)	—			(13,606		)
Insurance proceeds from involuntary conversion of property, plant and equipment	—			482			—			—			482
Net contributions from affiliates	7,805			—			—			(7,805		)	—
Net distributions to affiliates	(14,705		)	—			—			14,705			—
Net cash used in financing activities	(6,900		)	(13,123		)	(1		)	6,900			(13,124		)
Cash flows from financing activities
Net contributions from affiliates	—			14,705			—			(14,705		)	—
Net distributions to affiliates	—			(5,513		)	(2,292		)	7,805			—
Unit holder contributions	312			263			—			—			575
Unit holder distributions	(7,805		)	—			—			—			(7,805		)
Issuance of Series A Convertible Preferred Units	14,393			—			—			—			14,393
Net distributions to noncontrolling interest owners	—			—			(443		)	—			(443		)
LTIP tax netting unit repurchase	—			(339		)	—			—			(339		)
Deferred debt issuance costs	—			(1,315		)	—			—			(1,315		)
Payments on other debt	—			(1,139		)	—			—			(1,139		)
Borrowings on other debt	—			1,495			—			—			1,495
Payments on bank loans	—			(489		)	—			—			(489		)
Borrowings on bank loans	—			1,274			—			—			1,274
Payments on long-term debt	—			(56,546		)	—			—			(56,546		)
Borrowings on long-term debt	—			51,921			—			—			51,921
Net cash provided by (used in) financing activities	6,900			4,317			(2,735		)	(6,900		)	1,582
Net decrease in cash and cash equivalents	—			876			—			—			876
Cash and cash equivalents
Beginning of period	1			575			—			—			576
End of period	$	1		$	1,451		$	—		$	—		$	1,452
Supplemental cash flow information
Interest payments, net	$	—		$	3,049		$	—		$	—		$	3,049
Supplemental non-cash information
Decrease in accrued property, plant and equipment	$	—		$	(6,023	)	$	—		$	—		$	(6,023	)
Net assets contributed	22,129			—			—			—			22,129
Net assets contributed in exchange for the issuance of Series A convertible preferred units	59,994			—			—			—			59,994
Fair value of Series A Units in excess of net assets received	15,612			—			—			—			15,612
Accrued unitholder distribution for Series A Units	2,146			—			—			—			2,146

Subsequent_Events

Subsequent Events	6 Months Ended
	Jun. 30, 2014
Subsequent Events [Abstract]	'
Subsequent Events	'
	Subsequent Events
	Acquisition Agreement
	On July 14, 2014, a subsidiary of the Partnership entered into a Purchase and Sale Agreement (“PSA”) with an affiliate of DCP Midstream, LLC ("DCP") to acquire entities holding onshore natural gas processing and offshore natural gas gathering and transportation and oil gathering assets for a purchase price of $115.4 million, subject to certain woking capital adjustments.  The assets to be acquired included the Mobile Bay gas processing plant (“Mobile Bay”), Dauphin Island gathering and transmission system (“DIGP”), and DCP’s interest in the Main Pass Oil Gathering System (“MPOG”).
	Subsequent to execution of the PSA, DCP notified the Partnership that a material customer would be moving its production from DIGP and Mobile Bay. The loss of such customer’s production constituted a Material Adverse Effect (as defined in the PSA) with respect to such entities. As a result, on August 11, 2014, the PSA was amended to exclude the Mobile Bay and DIGP assets and to include only the acquisition of DCP’s interest in MPOG.  In addition, the purchase price was revised to $13.5 million. The acquisition closed on August 11, 2014.
	Common Unit Purchase Agreement
	On July 14, 2014, the Partnership entered into a common unit purchase agreement with certain institutional investors to sell 7,613,247 common units representing limited partner interests in the Partnership (the "PIPE Offering") in a private placement at a price of $26.27 per common unit, less $0.4625 per unit, which reflects the distribution per unit declared with respect to the three months ended June 30, 2014, for aggregate consideration of $200.0 million, less approximately $3.5 million, which reflects the total distribution amount that would have been paid on the incremental common units with respect to the three months ended June 30, 2014. As of August 11, 2014, not all of the closing conditions have been satisfied, and the PIPE Offering has not funded or closed.
	Distribution
	On July 24, 2014, we announced a distribution of $0.4625 per unit for the quarter ended June 30, 2014, or $1.85 per unit on an annualized basis, payable on August 14, 2014 to unitholders of record on August 7, 2014. Holders of our Series B Units will participate pro rata in this distribution. We will exercise our right to pay the holders of our Series B Units in Series B Units rather than cash.
	Series A Distribution Amendment
	The Partnership executed an amendment to the Partnership agreement related to its outstanding Series A Units which became effective July 24, 2014. As a result of the Amendment, distributions on Series A units will be made with paid-in-kind Series A units, cash or a combination thereof, at the discretion of the Board of Directors, beginning with the distribution for the three months ended June 30, 2014 and the subsequent three fiscal quarters. Prior to the Amendment, the Partnership was required to pay distributions on the Series A units with a combination of paid-in-kind units and cash. The Board of Directors of the General Partner approved a distribution of paid-in-kind Series A Units for the three months ended June 30, 2014 payable in the third quarter of 2014. We have recorded the impacts of this amendment for the three months ended June 30, 2014 and have accrued $3.9 million for the paid-in-kind Series A Units.

Asset_Retirement_Obligations_N

Asset Retirement Obligations (Notes)	6 Months Ended
	Jun. 30, 2014
Asset Retirement Obligation Disclosure [Abstract]	'
Asset Retirement Obligation Disclosure [Text Block]	'
	9. Asset Retirement Obligations
	We record a liability for the fair value of asset retirement obligations and conditional asset retirement obligations that we can reasonably estimate, on a discounted basis, in the period in which the liability is incurred. We collectively refer to asset retirement obligations and conditional asset retirement obligations as ARO.
	Certain assets related to our Transmission segment have regulatory obligations to perform remediation and, in some instances, dismantlement and removal activities when the assets are abandoned. These asset retirement obligations include varying levels of activity including disconnecting inactive assets from active assets, cleaning and purging assets, and in some cases, completely removing the assets and returning the land to its original state. These assets have been in existence for many years and with regular maintenance will continue to be in service for many years to come. It is not possible to predict when demand for these transmission services will cease, and we do not believe that such demand will cease for the foreseeable future. A portion of our regulatory obligations is related to assets that we plan to take out of service.
	No assets were legally restricted for purposes of settling our ARO liabilities during the six months ended June 30, 2014. The following table is a reconciliation of the asset retirement obligations (in thousands):
		June 30, 2014
	Beginning asset retirement obligation	$	34,636
	Liabilities assumed	248
	Expenditures	(623		)
	Accretion expense	387
	Ending asset retirement obligation	$	34,648
	We are required to establish security against any potential secondary obligations relating to the abandonment of certain transmission assets that may be imposed on the previous owner by applicable regulatory authorities. As such, we have a restricted cash account that is established, held and maintained by a third party that amounts to $3.0 million and is presented in Other assets, net in our consolidated balance sheet as of June 30, 2014.

Organization_and_Basis_of_Pres1

Organization and Basis of Presentation (Policies)	6 Months Ended
	Jun. 30, 2014
Organization, Consolidation and Presentation of Financial Statements [Abstract]	'
Nature of Business	'
	Nature of Business
	American Midstream Partners, LP (the “Partnership”), was formed on August 20, 2009 as a Delaware limited partnership for the purpose of operating, developing and acquiring a diversified portfolio of midstream energy assets. We provide natural gas gathering, treating, processing, fractionating, marketing and transportation services primarily in the Gulf Coast and Southeast regions of the United States through our ownership and operation of ten gathering systems, two processing facilities, one fractionation facility, three interstate pipelines and five intrastate pipelines. In addition, we own a 50% undivided, non-operating interest in a processing plant located in southern Louisiana. Through our four marine terminal sites, we provide petroleum, agricultural, and chemical liquid storage services.
	We hold our assets in a series of wholly owned limited liability companies, a limited partnership and a corporation. Our capital accounts consist of general partner interests and limited partner interests.
	Our interstate natural gas pipeline assets transport natural gas through the FERC regulated interstate natural gas pipelines in Louisiana, Mississippi, Alabama and Tennessee. Our interstate pipelines include:
	•	High Point Gas Transmission, LLC, which owns and operates approximately 400 miles of intrastate pipeline and is connected to 40 meters with 32 active producers and offers processing options at the Toca processing plant with delivery to Southern Natural Gas available downstream of the processing plant in Louisiana;
	•	American Midstream (Midla), LLC, which owns and operates approximately 370 miles of interstate pipeline that runs from the Monroe gas field in northern Louisiana south through Mississippi to Baton Rouge, Louisiana;
	•	American Midstream (AlaTenn), LLC, which owns and operates approximately 295 miles of interstate pipeline that runs through the Tennessee River Valley from Selmer, Tennessee to Huntsville, Alabama and serves an eight-county area in Alabama, Mississippi and Tennessee.
	Equity Offering and Series B Convertible Units Issuance
	In January 2014, in connection with the Lavaca Acquisition as discussed in Note 3, the Partnership completed a public equity offering resulting in net proceeds of $86.9 million and the issuance to our General Partner of 1,168,225 Series B convertible units ("Series B Units") representing Series B limited partnership interests in the Partnership. The net proceeds related to the Series B Units issuance was $30.0 million. The Series B Units have the right to share in distributions from the Partnership on a pro-rata basis with holders of the Partnership’s common units and will convert into common units on a one-for-one basis on January 31, 2016.
Basis of Presentation	'
	Basis of Presentation
	These unaudited condensed consolidated financial statements have been prepared in accordance with GAAP for interim financial information. Accordingly, they do not include all of the information and footnotes required by GAAP for complete financial statements. The year-end balance sheet data was derived from consolidated audited financial statements but does not include disclosures required by GAAP for annual periods. We have made reclassifications to amounts reported in prior period condensed consolidated financial statements to conform to our current year presentation. These reclassifications did not have an impact on net income for the period previously reported. The information furnished herein reflects all normal recurring adjustments which are, in the opinion of management, necessary for a fair statement of financial position and results of operations for the respective interim periods.
	The financial results for the year ended December 31, 2013 and for the three and six months ended June 30, 2013 are not consistent with amounts previously presented as an asset group previously presented as held for sale was reclassified during the current period to held and used. As a result, we reclassified amounts within the comparative periods to reflect that reclassification.
	Our financial results for the three and six months ended June 30, 2014 are not necessarily indicative of the results that may be expected for the full year ended December 31, 2014. These unaudited condensed consolidated financial statements should be read in conjunction with our consolidated financial statements and notes thereto included in i) our Annual Report on Form 10-K for the year ended December 31, 2013 (“Annual Report”) filed on March 11, 2014 and ii) our Annual Report on Form 10-K/A that was filed with the Securities and Exchange Commission ("SEC") on May 12, 2014, which updated portions of our annual report.
Consolidation Policy	'
	Consolidation Policy
	Our condensed consolidated financial statements include our accounts and those of our subsidiaries in which we have a controlling interest. We hold a 50% undivided interest in the Burns Point gas processing facility in which we are responsible for our proportionate share of the costs and expenses of the facility. Our condensed consolidated financial statements reflect our proportionate share of the revenues, expenses, assets and liabilities of this undivided interest. As of June 30, 2014, we also hold a 92.2% undivided interest in the Chatom Processing and Fractionation facility (the "Chatom System"). Our condensed consolidated financial statements reflect the accounts of the Chatom System and the interests in the Chatom System held by non-affiliated working interest owners are reflected as noncontrolling interests in the Partnership's condensed consolidated financial statements.
Use of Estimates	'
	Use of Estimates
	When preparing condensed consolidated financial statements in conformity with GAAP, management must make estimates and assumptions based on information available at the time. These estimates and assumptions affect the reported amounts of assets, liabilities, revenues and expenses, as well as the disclosures of contingent assets and liabilities as of the date of the financial statements. Estimates and judgments are based on information available at the time such estimates and judgments are made. Adjustments made with respect to the use of these estimates and judgments often relate to information not previously available. Uncertainties with respect to such estimates and judgments are inherent in the preparation of financial statements. Estimates and judgments are used in, among other things i) estimating unbilled revenues, accrued gas purchases and operating and general and administrative costs, ii) developing fair value assumptions, including estimates of future cash flows and discount rates, iii) analyzing long-lived assets, goodwill and intangible assets for possible impairment, iv) estimating the useful lives of assets and v) determining amounts to accrue for contingencies, guarantees and indemnifications. Actual results, therefore, could differ materially from estimated amounts.

Acquisitions_and_Divestitures_

Acquisitions and Divestitures Lavaca Acquisition (Tables)	6 Months Ended
	Jun. 30, 2014
Acquired Finite-Lived Intangible Assets [Line Items]	'
Business Combination Disclosure [Text Block]	'
	The following table summarizes the preliminary purchase price allocation for the Lavaca Acquisition (in thousands):
	Property, plant and equipment:
	Land	$	2
	Pipelines	55,654
	Equipment	753
	Total property, plant and equipment	56,409
	Intangible assets	48,000
	Total cash consideration	$	104,409

Discontinued_Operations_Operat

Discontinued Operations Operation of discontinued operations (Tables)	6 Months Ended
	Jun. 30, 2014
Discontinued Operations and Disposal Groups [Abstract]	'
Schedule of Disposal Groups, Including Discontinued Operations, Income Statement, Balance Sheet and Additional Disclosures [Table Text Block]	'
	The following table presents the revenue and expenses and Loss from operations of disposal groups, net of tax associated with the assets classified as held for sale for the three and six months ended June 30, 2014 and 2013 (in thousands, except per unit amounts):
		Three months ended June 30,						Six months ended June 30,
		2014			2013			2014			2013
	Revenue	$	212		$	609		$	449		$	1,128
	Expense	(268		)	(671		)	(545		)	(1,196		)
	Loss on impairment of property, plant and equipment	(673		)	(1,807		)	(673		)	(1,807		)
	Loss on sale of assets	(65		)	—			(87		)	—
	Income tax benefit	288			—			300			—
	Loss from operations of disposal groups, net of tax	$	(506	)	$	(1,869	)	$	(556	)	$	(1,875	)
	Limited partners' net loss per unit from discontinued operations (basic and diluted)	$	(0.04	)	$	(0.20	)	$	(0.05	)	$	(0.19	)

Concentration_of_Credit_Risk_a1

Concentration of Credit Risk and Trade Accounts Receivable (Tables)	6 Months Ended
	Jun. 30, 2014
Risks and Uncertainties [Abstract]	'
Schedule of Revenue by Major Customers by Reporting Segments [Table Text Block]	'
	The following table summarizes the percentage of revenue earned from those customers that accounted for 10% or more of the Partnership's consolidated revenue in the condensed consolidated statement of operations for the each of the periods presented below:
		Three months ended June 30,				Six months ended June 30,
		2014		2013		2014		2013
	Customer A	26	%	24	%	27	%	27	%
	Customer B	14	%	11	%	14	%	12	%
	Customer C	11	%	12	%	10	%	13	%
	Customer D	10	%	—	%	10	%	10	%
	Other	39	%	53	%	39	%	38	%
	Total	100	%	100	%	100	%	100	%

Derivatives_Tables

Derivatives (Tables)	6 Months Ended
	Jun. 30, 2014
Derivative Instruments and Hedging Activities Disclosure [Abstract]	'
Fair value associated with commodity derivative instruments	'
	As of June 30, 2014 and December 31, 2013, the value associated with our commodity derivatives and interest rate swap instrument were recorded in our condensed consolidated balance sheets, under the captions as follows (in thousands):
			Gross Risk Management Assets						Gross Risk Management Liabilities							Net Risk Management Assets (Liabilities)
	Balance Sheet Classification		June 30,			December 31, 2013			June 30,				December 31, 2013			June 30,			December 31, 2013
			2014						2014							2014
	Current		$	885		$	473		$	—			$	—		$	885		$	473
	Noncurrent		—			—			—				—			—			—
	Total assets		$	885		$	473		$	—			$	—		$	885		$	473
	Current		$	153		$	27		$	(755	)		$	(450	)	$	(602	)	$	(423	)
	Noncurrent		—			—			(36		)		(101		)	(36		)	(101		)
	Total liabilities		$	153		$	27		$	(791	)		$	(551	)	$	(638	)	$	(524	)
Realized and unrealized gains (losses) with commodity and interst rate derivative instruments	'
	For the three and six months ended June 30, 2014 and 2013, respectively, the realized and unrealized gains (losses) associated with our commodity derivatives, interest rate swap instrument and weather derivative were recorded in our condensed consolidated statements of operations, under the captions as follows (in thousands):
		Three months ended June 30,						Six months ended June 30,
		Gain (loss) on derivatives						Gain (loss) on derivatives
	Statement of Operations Classification	Realized			Unrealized			Realized				Unrealized
	2014
	Loss on commodity derivatives, net	$	(80	)	$	(113	)	(182		)		(141		)
	Interest expense	(109		)	38			(213		)		28
	Direct operating expenses	(269		)	—			(553		)		—
	Total	$	(458	)	$	(75	)	$	(948	)		$	(113	)
	2013
	Gain on commodity derivatives, net	$	360		$	554		536				73
	Interest expense	—			(318		)	—				(318		)
	Direct operating expenses	(95		)	—			(95		)		—
	Total	$	265		$	236		$	441			$	(245	)

Fair_Value_Measurement_Tables

Fair Value Measurement (Tables)	6 Months Ended
	Jun. 30, 2014
Fair Value Disclosures [Abstract]	'
Fair value of financial instruments	'
	Fair Value of Financial Instruments
	The following table sets forth by level within the fair value hierarchy, our commodity derivative instruments and interest rate swap, included as part of Risk management assets and Risk management liabilities within the condensed consolidated balance sheet, that were measured at fair value on a recurring basis as of June 30, 2014 and December 31, 2013 (in thousands):
		Carrying			Estimated Fair Value
		Amount			Level 1		Level 2			Level 3		Total
	Commodity derivative instruments, net
	June 30, 2014	$	(211	)	$	—	$	(211	)	$	—	$	(211	)
	December 31, 2013	(70		)	—		(70		)	—		(70		)
	Interest rate swap
	30-Jun-14	$	(426	)	$	—	$	(426	)	$	—	$	(426	)
	31-Dec-13	(454		)	—		(454		)	—		(454		)

Property_Plant_and_Equipment_T

Property, Plant and Equipment (Tables)	6 Months Ended
	Jun. 30, 2014
Property, Plant and Equipment [Abstract]	'
Property, plant and equipment, net	'
	Property, plant and equipment, net, as of June 30, 2014 and December 31, 2013 were as follows (in thousands):
		Useful Life	June 30,			December 31,
		(in years)	2014			2013
	Land	N/A	$	6,133		$	6,015
	Construction in progress	N/A	20,305			6,443
	Base gas	N/A	1,108			1,108
	Buildings and improvements	4 to 40	5,299			5,109
	Processing and treating plants	8 to 40	98,404			97,106
	Pipelines	5 to 40	298,168			239,865
	Compressors	4 to 20	12,488			11,955
	Dock	20 to 40	7,954			7,942
	Tanks, truck rack and piping	20 to 40	22,432			22,432
	Equipment	8 to 20	8,497			6,294
	Computer software	5	3,595			3,531
	Total property, plant and equipment		484,383			407,800
	Accumulated depreciation		(103,065		)	(95,099		)
	Property, plant and equipment, net		$	381,318		$	312,701

Debt_Obligations_Tables

Debt Obligations (Tables)	6 Months Ended
	Jun. 30, 2014
Debt Disclosure [Abstract]	'
Outstanding borrowings under the credit facility	'
	Our outstanding borrowings at June 30, 2014 and December 31, 2013, respectively, were (in thousands):
		June 30,		December 31,
		2014		2013
	Revolving credit facility	$	136,500	$	130,735
	Other debt	574		2,048
	Total debt	137,074		132,783
	Less: current portion	574		2,048
	Long-term debt	$	136,500	$	130,735

Partners_Capital_Tables

Partners' Capital (Tables)	6 Months Ended
	Jun. 30, 2014
Equity [Abstract]	'
Numbers of units outstanding	'
	The numbers of units outstanding as of June 30, 2014 and December 31, 2013, respectively, were as follows (in thousands):
		June 30,			December 31,
		2014			2013
	Series A convertible preferred units	5,430			5,279
	Series B convertible units	1,210			—
	Limited partner common units	11,140			7,414
	General partners units	235			185
Schedule of Calulation for Net Income (Loss) Per Limited Partner Unit	'
		Three months ended June 30,							Six months ended June 30,
		2014				2013			2014			2013
	Net loss from continuing operations	$	(1,095	)		$	(20,057	)	$	(537	)	$	(23,449	)
	Less: Net income attributable to noncontrolling interests	66				188			174			343
	Net loss from continuing operations attributable to the Partnership	(1,161		)		(20,245		)	(711		)	(23,792		)
	Less:
	Contractual distributions on Series A Units	3,917				17,760			7,098			17,760
	Declared distributions on Series B Units	560				—			1,052			—
	General partner's distribution	603				80			1,085			160
	General partner's share in undistributed loss	(149		)		(1,236		)	(262		)	(1,386		)
	Net loss from continuing operations available to limited partners	(6,092		)		(36,849		)	(9,684		)	(40,326		)
	Net loss from operations of disposal groups, net of tax, available to limited partners	(499		)		(1,846		)	(549		)	(1,710		)
	Net loss available to limited partners	$	(6,591	)		$	(38,695	)	$	(10,233	)	$	(42,036	)
	Weighted average number of units used in computation of limited partners’ net (loss) income per unit (basic and diluted)	11,139				9,198			10,496			9,183
	Limited partners' net loss per common unit
	Basic and diluted:
	Loss from continuing operations	$	(0.55	)		$	(4.01	)	$	(0.92	)	$	(4.39	)
	Loss from discontinued operations	(0.04		)		(0.20		)	(0.05		)	(0.19		)
	Net loss	$	(0.59	)		$	(4.21	)	$	(0.97	)	$	(4.58	)

LongTerm_Incentive_Plan_Tables

Long-Term Incentive Plan (Tables)	6 Months Ended
	Jun. 30, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]	'
Table summarizes our unit-based awards	'
	The following table summarizes the change in our unit-based awards during the six months ended June 30, 2014 indicated, in units:
		Six months ended June 30, 2014
		Shares		Weighted-Average Exercise Price
	Outstanding at beginning of period	75,529		17.62
	Granted	180,791		20.56
	Forfeited	(5,135	)	20.13
	Vested	(31,829	)	19.34
	Outstanding at end of period	219,356		19.73

Reporting_Segments_Tables

Reporting Segments (Tables)	6 Months Ended
	Jun. 30, 2014
Segment Reporting [Abstract]	'
Segment information	'
	The following tables set forth our segment information for the three and six months ended June 30, 2014 and 2013 (in thousands):
		Three months ended June 30, 2014
		Gathering			Transmission		Terminals		Total
		and
		Processing
	Revenue	$	50,015		$	23,960	$	3,898	$	77,873
	Loss on commodity derivatives, net	(193		)	—		—		(193		)
	Total revenue	49,822			23,960		3,898		77,680
	Operating expenses:
	Purchases of natural gas, NGL's and condensate	39,238			14,580		—		53,818
	Direct operating expenses	5,746			3,736		1,562		11,044
	Selling, general and administrative expenses								5,637
	Equity compensation expense								435
	Depreciation, amortization and accretion expense								6,012
	Total operating expenses								76,946
	Interest expense								(1,680		)
	Income tax benefit								(149		)
	Loss from operations of disposal groups, net of tax								(506		)
	Net income								(1,601		)
	Less: Net income attributable to non-controlling interests								66
	Net income attributable to the Partnership								$	(1,667	)
	Segment gross margin (a)	$	10,481		$	9,350	$	2,336	$	22,167
		Three months ended June 30, 2013
		Gathering			Transmission		Terminals		Total
		and
		Processing
	Revenue	$	52,525		$	20,886	$	2,866	$	76,277
	Gain on commodity derivatives, net	914			—		—		914
	Total revenue	53,439			20,886		2,866		77,191
	Operating expenses:
	Purchases of natural gas, NGL's and condensate	43,702			13,263		—		56,965
	Direct operating expenses	3,637			3,556		1,209		8,402
	Selling, general and administrative expenses								4,588
	Equity compensation expense								1,097
	Depreciation, amortization and accretion expense								8,748
	Total operating expenses								79,800
	Loss on impairment of property, plant and equipment								(15,232		)
	Interest expense								(2,591		)
	Income tax benefit								375
	Loss from operations of disposal groups, net of tax								(1,869		)
	Net loss								(21,926		)
	Less: Net income attributable to non-controlling interests								188
	Net loss attributable to the Partnership								$	(22,114	)
	Segment gross margin (a)	$	9,077		$	7,583	$	1,657	$	18,317
		Six months ended June 30, 2014
		Gathering			Transmission		Terminals		Total
		and
		Processing
	Revenue	$	101,641		$	49,088	$	7,512	$	158,241
	Loss on commodity derivatives, net	(323		)	—		—		(323		)
	Total revenue	101,318			49,088		7,512		157,918
	Operating expenses:
	Purchases of natural gas, NGL's and condensate	80,359			28,680		—		109,039
	Direct operating expenses	9,914			6,854		3,237		20,005
	Selling, general and administrative expenses								11,230
	Equity compensation expense								795
	Depreciation, amortization and accretion expense								13,644
	Total operating expenses								154,713
	Loss on sale of assets, net								(21		)
	Interest expense								(3,583		)
	Income tax benefit								(138		)
	Loss from operations of disposal groups, net of tax								(556		)
	Net income								(1,093		)
Less: Net income attributable to non-controlling interests								174
Net income attributable to the Partnership								$	(1,267	)
Segment gross margin (a)	$	20,610		$	20,363	$	4,275	$	45,248
	Six months ended June 30, 2013
	Gathering			Transmission		Terminals		Total
	and
	Processing
Revenue	$	100,766		$	35,549	$	2,866	$	139,181
Loss on commodity derivatives, net	609			—		—		609
Total revenue	101,375			35,549		2,866		139,790
Operating expenses:
Purchases of natural gas, NGL's and condensate	83,370			23,864		—		107,234
Direct operating expenses	7,127			4,941		1,209		13,277
Selling, general and administrative expenses								8,013
Equity compensation expense								1,485
Depreciation, amortization and accretion expense								14,394
Total operating expenses								144,403
Gain on involuntary conversion of property, plant and equipment								343
Loss on impairment of property, plant and equipment								(15,232		)
Interest expense								(4,322		)
Income tax benefit								375
Loss from operations of disposal groups, net of tax								(1,875		)
Net loss								(25,324		)
Less: Net income attributable to non-controlling interests								343
Net loss attributable to the Partnership								$	(25,667	)
Segment gross margin (a)	$	17,784		$	11,581	$	1,657	$	31,022
(a)	Segment gross margin for our Gathering and Processing segment consists of revenue less purchases of natural gas, NGLs and condensate and revenue from construction, operating and maintenance agreements (“COMA”). Segment gross margin for our Transmission segment consists of revenue, less purchases of natural gas and COMA. Segment gross margin for our Terminals segment consists of revenue, less direct operating expenses. Gross margin consists of the sum of the segment gross margin amounts for each of these segments. As an indicator of our operating performance, gross margin should not be considered an alternative to, or more meaningful than, net income or cash flow from operations as determined in accordance with GAAP. Our gross margin may not be comparable to a similarly titled measure of another company because other entities may not calculate gross margin in the same manner.

Subsidiary_Guarantors_Tables

Subsidiary Guarantors (Tables)	6 Months Ended
	Jun. 30, 2014
Subsidiary Guarantors [Abstract]	'
Schedule of Condensed Balance Sheet [Table Text Block]	'
		Condensed Consolidating Balance Sheet
		31-Dec-13
		Parent			Guarantor Subsidiaries			Non-Guarantor Subsidiary			Consolidating Adjustments			Consolidated
	Assets
	Current assets
	Cash and cash equivalents	$	1		$	392		$	—		$	—		$	393
	Accounts receivable	—			4,461			2,361			—			6,822
	Unbilled revenue	—			18,321			4,680			—			23,001
	Risk management assets	—			473			—			—			473
	Other current assets	84			6,942			555			(84		)	7,497
	Current assets held for sale	—			272			—			—			272
	Total current assets	85			30,861			7,596			(84		)	38,458
	Risk management assets, long-term	—			—			—			—			—
	Property, plant and equipment, net	—			254,656			58,045			—			312,701
	Note receivable	27,315			—			—			(27,315		)	—
	Goodwill	—			16,447			—			—			16,447
	Intangible assets, net	—			3,682			—			—			3,682
	Other assets, net	—			8,321			743			—			9,064
	Noncurrent assets held for sale, net	—			1,723			—			—			1,723
	Investment in subsidiaries	142,758			57,750			—			(200,508		)	—
	Total assets	$	170,158		$	373,440		$	66,384		$	(227,907	)	$	382,075
	Liabilities, Equity and Partners’ Capital
	Current liabilities
	Accounts payable	$	30		$	2,902		$	329		$	—		$	3,261
	Accrued gas purchases	—			14,282			3,104			—			17,386
	Accrued expenses and other current liabilities	1,478			13,563			101			(84		)	15,058
	Current portion of long-term debt	—			2,048			—			—			2,048
	Risk management liabilities	—			423			—			—			423
	Current liabilities held for sale	—			114			—			—			114
	Total current liabilities	1,508			33,332			3,534			(84		)	38,290
	Risk management liabilities - long-term	—			101			—			—			101
	Asset retirement obligations	—			34,164			472			—			34,636
	Other liabilities	—			191			—			—			191
	Long-term debt	—			158,050			—			(27,315		)	130,735
	Deferred tax liability	—			4,749			—			—			4,749
	Noncurrent liabilities held for sale, net	—			95			—			—			95
	Total liabilities	1,508			230,682			4,006			(27,399		)	208,797
	Convertible preferred units
	Series A convertible preferred units	94,811			—			—			—			94,811
	Total partners’ capital	73,839			142,758			57,750			(200,508		)	73,839
	Noncontrolling interests	—			—			4,628			—			4,628
	Total equity and partners' capital	73,839			142,758			62,378			(200,508		)	78,467
	Total liabilities, equity and partners' capital	$	170,158		$	373,440		$	66,384		$	(227,907	)	$	382,075
Schedule of Condensed Income Statement [Table Text Block]	'
		Condensed Consolidating Statements of Operations
		Three months ended June 30, 2014
		Parent			Guarantor Subsidiaries			Non-Guarantor Subsidiary			Consolidating Adjustments			Consolidated
	Revenue	$	—		$	67,724		$	12,493		$	(2,344	)	$	77,873
	Loss on commodity derivatives, net	—			(130		)	(63		)	—			(193		)
	Total revenue	—			67,594			12,430			(2,344		)	77,680
	Operating expenses:
	Purchases of natural gas, NGLs and condensate	—			46,142			10,020			(2,344		)	53,818
	Direct operating expenses	—			9,901			1,143			—			11,044
	Selling, general and administrative expenses	—			5,637			—			—			5,637
	Equity compensation expense	—			435			—			—			435
	Depreciation and accretion expense	—			5,587			425			—			6,012
	Total operating expenses	—			67,702			11,588			(2,344		)	76,946
	Operating income	—			(108		)	842			—			734
	Earnings from consolidated affiliate	(2,331		)	776			—			1,555			—
	Interest income (expense)	664			(2,344		)	—			—			(1,680		)
	Net loss before income tax benefit	(1,667		)	(1,676		)	842			1,555			(946		)
	Income tax benefit	—			(149		)	—			—			(149		)
	Net loss from continuing operations	(1,667		)	(1,825		)	842			1,555			(1,095		)
	Loss from operations of disposal groups, net of tax	—			(506		)	—			—			(506		)
	Net income	(1,667		)	(2,331		)	842			1,555			(1,601		)
	Net income attributable to noncontrolling interests	—			—			66			—			66
	Net loss attributable to the Partnership	$	(1,667	)	$	(2,331	)	$	776		$	1,555		$	(1,667	)
		Condensed Consolidating Statements of Operations
		Three months ended June 30, 2013
		Parent			Guarantor Subsidiaries			Non-Guarantor Subsidiary			Consolidating Adjustments			Consolidated
	Revenue	$	—		$	64,178		$	13,607		$	(1,508	)	$	76,277
	Gain on commodity derivatives, net	—			914			—			—			914
	Total revenue	—			65,092			13,607			(1,508		)	77,191
	Operating expenses:
	Purchases of natural gas, NGLs and condensate	—			47,902			10,571			(1,508		)	56,965
	Direct operating expenses	—			7,285			1,117			—			8,402
	Selling, general and administrative expenses	—			4,588			—			—			4,588
	Equity compensation expense	—			1,097			—			—			1,097
	Depreciation and accretion expense	—			8,334			414			—			8,748
	Total operating expenses	—			69,206			12,102			(1,508		)	79,800
	Loss on impairment of property, plant and equipment	—			(15,232		)	—			—			(15,232		)
	Operating (loss) income	—			(19,346		)	1,505			—			(17,841		)
	(Loss) earnings from consolidated affiliate	(22,114		)	1,317			—			20,797			—
	Interest expense	—			(2,591		)	—			—			(2,591		)
	Net (loss) income before income tax benefit	(22,114		)	(20,620		)	1,505			20,797			(20,432		)
	Income tax benefit	—			375			—			—			375
	Net (loss) income from continuing operations	(22,114		)	(20,245		)	1,505			20,797			(20,057		)
	Income from operations of disposal groups, net of tax	—			(1,869		)	—			—			(1,869		)
	Net (loss) income	(22,114		)	(22,114		)	1,505			20,797			(21,926		)
	Net income attributable to noncontrolling interests	—			—			188			—			188
	Net (loss) income attributable to the Partnership	$	(22,114	)	$	(22,114	)	$	1,317		$	20,797		$	(22,114	)
		Condensed Consolidating Statements of Operations
		Six months ended June 30, 2014
		Parent			Guarantor Subsidiaries			Non-Guarantor Subsidiary			Consolidating Adjustments			Consolidated
	Revenue	$	—		$	139,343		$	24,060		$	(5,162	)	$	158,241
	Loss on commodity derivatives, net	—			(233		)	(90		)	—			(323		)
	Total revenue	—			139,110			23,970			(5,162		)	157,918
	Operating expenses:
	Purchases of natural gas, NGLs and condensate	—			95,014			19,187			(5,162		)	109,039
	Direct operating expenses	—			17,840			2,165			—			20,005
	Selling, general and administrative expenses	—			11,230			—			—			11,230
	Equity compensation expense	—			795			—			—			795
	Depreciation and accretion expense	—			12,799			845			—			13,644
	Total operating expenses	—			137,678			22,197			(5,162		)	154,713
	Gain on sale of assets, net	—			(21		)	—			—			(21		)
	Operating (loss) income	—			1,411			1,773			—			3,184
	(Loss) earnings from consolidated affiliate	(2,512		)	1,599			—			913			—
Interest income (expense)	1,245			(4,828		)	—			—			(3,583		)
Net (loss) income before income tax benefit	(1,267		)	(1,818		)	1,773			913			(399		)
Income tax benefit	—			(138		)	—			—			(138		)
Net (loss) income from continuing operations	(1,267		)	(1,956		)	1,773			913			(537		)
Income from operations of disposal groups, net of tax	—			(556		)	—			—			(556		)
Net (loss) income	(1,267		)	(2,512		)	1,773			913			(1,093		)
Net income attributable to noncontrolling interests	—			—			174			—			174
Net (loss) income attributable to the Partnership	$	(1,267	)	$	(2,512	)	$	1,599		$	913		$	(1,267	)
	Condensed Consolidating Statements of Operations
	Six months ended June 30, 2013
	Parent			Guarantor Subsidiaries			Non-Guarantor Subsidiary			Consolidating Adjustments			Consolidated
Revenue	$	—		$	115,396		$	27,256		$	(3,471	)	$	139,181
Gain on commodity derivatives, net	—			609			—			—			609
Total revenue	—			116,005			27,256			(3,471		)	139,790
Operating expenses:
Purchases of natural gas, NGLs and condensate	—			89,216			21,489			(3,471		)	107,234
Direct operating expenses	—			11,074			2,203			—			13,277
Selling, general and administrative expenses	—			8,013			—			—			8,013
Equity compensation expense	—			1,485			—			—			1,485
Depreciation and accretion expense	—			13,566			828			—			14,394
Total operating expenses	—			123,354			24,520			(3,471		)	144,403
Gain on involuntary conversion of property, plant and equipment	—			343			—			—			343
Loss on impairment of property, plant and equipment	—			(15,232		)	—			—			(15,232		)
Operating (loss) income	—			(22,238		)	2,736			—			(19,502		)
(Loss) earnings from consolidated affiliate	(25,667		)	2,393			—			23,274			—
Interest expense	—			(4,322		)	—			—			(4,322		)
Net (loss) income before income tax benefit	(25,667		)	(24,167		)	2,736			23,274			(23,824		)
Income tax benefit	—			375			—			—			375
Net (loss) income from continuing operations	(25,667		)	(23,792		)	2,736			23,274			(23,449		)
Income from operations of disposal groups, net of tax	—			(1,875		)	—			—			(1,875		)
Net (loss) income	(25,667		)	(25,667		)	2,736			23,274			(25,324		)
Net income attributable to noncontrolling interests	—			—			343			—			343
Net (loss) income attributable to the Partnership	$	(25,667	)	$	(25,667	)	$	2,393		$	23,274		$	(25,667	)
	Condensed Consolidating Statements of Comprehensive Income
	Three months ended June 30, 2014
	Parent			Guarantor Subsidiaries			Non-Guarantor Subsidiary			Consolidating Adjustments			Consolidated
Net income	$	(1,667	)	$	(2,331	)	$	842		$	1,555		$	(1,601	)
Unrealized gain on post retirement benefit plan assets and liabilities	10			10			—			(10		)	10
Comprehensive income	(1,657		)	(2,321		)	842			1,545			(1,591		)
Less: Comprehensive income attributable to noncontrolling interests	—			—			66			—			66
Comprehensive income attributable to the Partnership	$	(1,657	)	$	(2,321	)	$	776		$	1,545		$	(1,657	)
	Condensed Consolidating Statements of Comprehensive Income
	Three months ended June 30, 2013
	Parent			Guarantor Subsidiaries			Non-Guarantor Subsidiary			Consolidating Adjustments			Consolidated
Net (loss) income	$	(22,114	)	$	(22,114	)	$	1,505		$	20,797		$	(21,926	)
Unrealized loss on post retirement benefit plan assets and liabilities	(43		)	(43		)	—			43			(43		)
Comprehensive (loss) income	(22,157		)	(22,157		)	1,505			20,840			(21,969		)
Less: Comprehensive income attributable to noncontrolling interests	—			—			188			—			188
Comprehensive (loss) income attributable to the Partnership	$	(22,157	)	$	(22,157	)	$	1,317		$	20,840		$	(22,157	)
	Condensed Consolidating Statements of Comprehensive Income
	Six months ended June 30, 2014
	Parent			Guarantor Subsidiaries			Non-Guarantor Subsidiary			Consolidating Adjustments			Consolidated
Net (loss) income	$	(1,267	)	$	(2,512	)	$	1,773		$	913		$	(1,093	)
Unrealized loss on post retirement benefit plan assets and liabilities	46			46			—			(46		)	46
Comprehensive (loss) income	(1,221		)	(2,466		)	1,773			867			(1,047		)
Less: Comprehensive income attributable to noncontrolling interests	—			—			174			—			174
Comprehensive (loss) income attributable to the Partnership	$	(1,221	)	$	(2,466	)	$	1,599		$	867		$	(1,221	)
	Condensed Consolidating Statements of Comprehensive Income
	Six months ended June 30, 2013
	Parent			Guarantor Subsidiaries			Non-Guarantor Subsidiary			Consolidating Adjustments			Consolidated
Net (loss) income	$	(25,667	)	$	(25,667	)	$	2,736		$	23,274		$	(25,324	)
Unrealized loss on post retirement benefit plan assets and liabilities	(56		)	(56		)	—			56			(56		)
Comprehensive (loss) income	(25,723		)	(25,723		)	2,736			23,330			(25,380		)
Less: Comprehensive income attributable to noncontrolling interests	—			—			343			—			343
Comprehensive (loss) income attributable to the Partnership	$	(25,723	)	$	(25,723	)	$	2,393		$	23,330		$	(25,723	)
Schedule of Cash Flow, Supplemental Disclosures [Table Text Block]	'
		Condensed Consolidating Statements of Cash Flows
		Six months ended June 30, 2014
		Parent			Guarantor Subsidiaries			Non-Guarantor Subsidiary			Consolidating Adjustments			Consolidated
	Net cash provided by operating activities	$	—		$	9,850		$	2,561		$	—		$	12,411
	Cash flows from investing activities
	Cost of acquisitions, net of cash acquired	—			(110,909		)	—			—			(110,909		)
	Additions to property, plant and equipment	—			(13,458		)	229			—			(13,229		)
	Proceeds from disposals of property, plant and equipment	—			6,202			—			—			6,202
	Net contributions from affiliates	13,793			—			—			(13,793		)	—
	Net distributions to affiliates	(118,180		)	—			—			118,180			—
	Net cash (used in) provided by financing activities	(104,387		)	(118,165		)	229			104,387			(117,936		)
	Cash flows from financing activities
	Net contributions from affiliates	—			118,180			—			(118,180		)	—
	Net distributions to affiliates	—			(11,228		)	(2,565		)	13,793			—
	Proceeds from issuance of common units to public, net of offering costs	86,904			—			—			—			86,904
	Unit holder contributions	1,276			—			—			—			1,276
	Unit holder distributions	(13,793		)	—			—			—			(13,793		)
	Issuance of Series B Units	30,000			—			—			—			30,000
	Acquisition of noncontrolling interest	—			(8		)	—			—			(8		)
	Net distributions to noncontrolling interest owners	—			(1		)	(225		)	—			(226		)
	LTIP tax netting unit repurchase	—			(151		)	—			—			(151		)
	Deferred debt issuance costs	—			(154		)	—			—			(154		)
	Payments on other debt	—			(1,644		)	—			—			(1,644		)
	Borrowings on other debt	—			170			—			—			170
	Payments on long-term debt	—			(75,220		)	—			—			(75,220		)
	Borrowings on long-term debt	—			80,985			—			—			80,985
	Net cash provided by (used in) financing activities	104,387			110,929			(2,790		)	(104,387		)	108,139
	Net increase in cash and cash equivalents	—			2,614			—			—			2,614
	Cash and cash equivalents
	Beginning of period	1			392			—			—			393
	End of period	$	1		$	3,006		$	—		$	—		$	3,007
	Supplemental cash flow information
	Interest payments, net	$	—		$	2,718		$	—		$	—		$	2,718
	Supplemental non-cash information
	Increase in accrued property, plant and equipment	$	—		$	9,501		$	—		$	—		$	9,501
	Accrued unitholder distribution for Series A Units	$	5,760		$	—		$	—		$	—		$	5,760
	In-kind unitholder distribution for Series B Units	$	1,052		$	—		$	—		$	—		$	1,052
		Condensed Consolidating Statements of Cash Flows
		Six months ended June 30, 2013
		Parent			Guarantor Subsidiaries			Non-Guarantor Subsidiary			Consolidating Adjustments			Consolidated
	Net cash provided by operating activities	$	—		$	9,682		$	2,736		$	—		$	12,418
	Cash flows from investing activities
	Additions to property, plant and equipment	—			(13,605		)	(1		)	—			(13,606		)
	Insurance proceeds from involuntary conversion of property, plant and equipment	—			482			—			—			482
	Net contributions from affiliates	7,805			—			—			(7,805		)	—
	Net distributions to affiliates	(14,705		)	—			—			14,705			—
	Net cash used in financing activities	(6,900		)	(13,123		)	(1		)	6,900			(13,124		)
	Cash flows from financing activities
	Net contributions from affiliates	—			14,705			—			(14,705		)	—
	Net distributions to affiliates	—			(5,513		)	(2,292		)	7,805			—
	Unit holder contributions	312			263			—			—			575
	Unit holder distributions	(7,805		)	—			—			—			(7,805		)
	Issuance of Series A Convertible Preferred Units	14,393			—			—			—			14,393
	Net distributions to noncontrolling interest owners	—			—			(443		)	—			(443		)
	LTIP tax netting unit repurchase	—			(339		)	—			—			(339		)
	Deferred debt issuance costs	—			(1,315		)	—			—			(1,315		)
	Payments on other debt	—			(1,139		)	—			—			(1,139		)
	Borrowings on other debt	—			1,495			—			—			1,495
	Payments on bank loans	—			(489		)	—			—			(489		)
	Borrowings on bank loans	—			1,274			—			—			1,274
	Payments on long-term debt	—			(56,546		)	—			—			(56,546		)
	Borrowings on long-term debt	—			51,921			—			—			51,921
	Net cash provided by (used in) financing activities	6,900			4,317			(2,735		)	(6,900		)	1,582
Net decrease in cash and cash equivalents	—			876			—			—			876
Cash and cash equivalents
Beginning of period	1			575			—			—			576
End of period	$	1		$	1,451		$	—		$	—		$	1,452
Supplemental cash flow information
Interest payments, net	$	—		$	3,049		$	—		$	—		$	3,049
Supplemental non-cash information
Decrease in accrued property, plant and equipment	$	—		$	(6,023	)	$	—		$	—		$	(6,023	)
Net assets contributed	22,129			—			—			—			22,129
Net assets contributed in exchange for the issuance of Series A convertible preferred units	59,994			—			—			—			59,994
Fair value of Series A Units in excess of net assets received	15,612			—			—			—			15,612
Accrued unitholder distribution for Series A Units	2,146			—			—			—			2,146

Asset_Retirement_Obligations_T

Asset Retirement Obligations (Tables)	6 Months Ended
	Jun. 30, 2014
Asset Retirement Obligation Disclosure [Abstract]	'
Schedule of Asset Retirement Obligations [Table Text Block]	'
		June 30, 2014
	Beginning asset retirement obligation	$	34,636
	Liabilities assumed	248
	Expenditures	(623		)
	Accretion expense	387
	Ending asset retirement obligation	$	34,648

Organization_and_Basis_of_Pres2

Organization and Basis of Presentation (Details) (USD $)

6 Months Ended

6 Months Ended

6 Months Ended

3 Months Ended

6 Months Ended

In Thousands, except Share data, unless otherwise specified

Jun. 30, 2014

Jun. 30, 2013

Jan. 29, 2014

Dec. 31, 2013

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Dec. 31, 2013

Jul. 14, 2014

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2013

Jun. 30, 2014

Jun. 30, 2013

Jan. 31, 2014

Dec. 31, 2013

Mar. 31, 2014

Jun. 30, 2014

counties

HPGT System [Member]

Midla System [Member]

Ala Tenn System [Member]

Partnership Interest [Member]

Subsequent Event [Member]

Burns Point Plant [Member]

Series B [Member]

Series B [Member]

Series B [Member]

Series B [Member]

Series B [Member]

Series B [Member]

Series B [Member]

Series B [Member]

mi

mi

mi

Producers

Meters

Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Length of pipeline

'

'

'

'

400

370

295

'

'

'

'

'

'

'

'

'

'

'

Number of meters

'

'

'

'

40

'

'

'

'

'

'

'

'

'

'

'

'

'

Number of producers

'

'

'

'

32

'

'

'

'

'

'

'

'

'

'

'

'

'

County in which entity operates

8

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Percentage of voting interests acquired

'

'

'

'

'

'

'

'

'

50.00%

'

'

'

'

'

'

'

'

Payments on long-term debt

$75,220

$56,546

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Other Ownership Interests, Units Outstanding

'

'

'

'

'

'

'

185,000

'

'

'

'

'

'

'

'

'

'

Unitholder contributions

1,276

'

'

'

'

'

'

'

'

'

0

0

'

'

'

'

'

'

Partners' Capital Account, Public Sale of Units Net of Offering Costs

86,904

0

'

'

'

'

'

'

'

'

0

'

-30,000

0

'

'

'

'

Limited Partners' Capital Account, Units Issued

11,139,729

'

3,400,000

7,414,000

'

'

'

'

7,613,247

'

'

'

1,210,221

'

1,168,225

0

'

'

Noncontrolling Interest, Ownership Percentage by Parent

92.20%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Proceeds from Issuance of Common Limited Partners Units

$31,052

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

$30,000

$31,052

Acquisitions_and_Divestitures_1

Acquisitions and Divestitures Lavaca Acquisition (Details) (USD $)

3 Months Ended

6 Months Ended

3 Months Ended

6 Months Ended

3 Months Ended

6 Months Ended

3 Months Ended

6 Months Ended

Jun. 30, 2014

Jun. 30, 2013

Jun. 30, 2014

Jun. 30, 2013

Jan. 29, 2014

Dec. 31, 2013

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2013

Jan. 31, 2014

Dec. 31, 2013

Mar. 31, 2014

Jun. 30, 2014

Jun. 30, 2014

Lavaca [Member]

Lavaca [Member]

Minimum [Member]

Maximum [Member]

Series B [Member]

Series B [Member]

Series B [Member]

Series B [Member]

Series B [Member]

Series B [Member]

Series B [Member]

Pipelines [Member]

mi

Lavaca [Member]

Lavaca [Member]

Lavaca [Member]

hp

in

in

Business Acquisition [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Revenues

$77,680,000

$77,191,000

$157,918,000

$139,790,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Business Acquisition, Purchase Price Allocation, Land

'

'

'

'

'

'

2,000

2,000

'

'

'

'

'

'

'

'

'

'

Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment

'

'

'

'

'

'

56,409,000

56,409,000

'

'

'

'

'

'

'

'

'

55,654,000

Length of pipeline

'

'

'

'

'

'

120

'

'

'

'

'

'

'

'

'

'

'

Diameters Length Ranging

'

'

'

'

'

'

'

'

4

8

'

'

'

'

'

'

'

'

Compressor Stations Compression Capacity Horsepower

'

'

'

'

'

'

9,000

'

'

'

'

'

'

'

'

'

'

'

Partners' Capital Account, Public Sale of Units Net of Offering Costs

'

'

86,904,000

0

'

'

'

'

'

'

0

-30,000,000

0

'

'

'

'

'

Proceeds from Issuance of Common Limited Partners Units

'

'

31,052,000

'

'

'

'

'

'

'

'

'

'

'

'

30,000,000

31,052,000

'

Limited Partners' Capital Account, Units Issued

11,139,729

'

11,139,729

'

3,400,000

7,414,000

'

'

'

'

'

1,210,221

'

1,168,225

0

'

'

'

Finite-Lived Intangible Asset, Useful Life

'

'

'25 years

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months

1,900,000

'

1,900,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Fair Value Inputs, Discount Rate

'

'

10.50%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Business Acquisition, Purchase Price Allocation, Equipment

'

'

'

'

'

'

753,000

753,000

'

'

'

'

'

'

'

'

'

'

Business Acquisition, Purchase Price Allocation, Amortizable Intangible Assets

'

'

'

'

'

'

48,000,000

48,000,000

'

'

'

'

'

'

'

'

'

'

Business Acquisition, Cost of Acquired Entity, Purchase Price

6,500,000

'

6,500,000

'

'

'

104,409,000

104,409,000

'

'

'

'

'

'

'

'

'

'

Business Acquisition, Pro Forma Revenue

'

'

'

'

'

'

3,700,000

6,000,000

'

'

'

'

'

'

'

'

'

'

Business Acquisition, Pro Forma Net Income (Loss)

'

'

'

'

'

'

600,000

2,200,000

'

'

'

'

'

'

'

'

'

'

Net Income (Loss) Attributable to Parent

($1,667,000)

($22,114,000)

($1,267,000)

($25,667,000)

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Acquisitions_and_Divestitures_2

Acquisitions and Divestitures Other Acquisition (Details) (USD $)	Jun. 30, 2014
In Millions, unless otherwise specified
Business Acquisition [Line Items]	'
Business Acquisition, Cost of Acquired Entity, Purchase Price	$6.50

Acquisitions_and_Divestitures_3

Acquisitions and Divestitures Blackwater Acquisition (Details) (USD $)	3 Months Ended		6 Months Ended		3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Dec. 17, 2013
					Terminals [Member]	Terminals [Member]	Terminals [Member]	Terminals [Member]	Terminals [Member]	Terminals [Member]
										bbl
Business Acquisition [Line Items]	'	'	'	'	'	'	'	'	'	'
Million barrels of storage capacity	'	'	'	'	'	'	'	'	'	1,700,000
Business Acquisition, Pro Forma Revenue	'	'	'	'	'	$2,866,000	'	$2,866,000	'	'
Revenues	77,680,000	77,191,000	157,918,000	139,790,000	3,898,000	'	'	'	7,512,000	'
Business Acquisition, Pro Forma Net Income (Loss)	'	'	'	'	($400,000)	$500,000	$500,000	'	'	'

Acquisitions_and_Divestitures_4

Acquisitions and Divestitures High Point Acquisition (Details) (USD $)	3 Months Ended		6 Months Ended		3 Months Ended	6 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2014	Apr. 15, 2013	Jun. 30, 2014
					High Point Infrastructure Partners, LLC [Member]	High Point Infrastructure Partners, LLC [Member]	High Point Infrastructure Partners, LLC [Member]	ArcLight [Member]
						mi		High Point Infrastructure Partners, LLC [Member]
								Gas_Receipt_Point
Business Acquisition [Line Items]	'	'	'	'	'	'	'	'
Percentage of voting interests acquired	'	'	'	'	'	'	100.00%	'
Length of pipeline	'	'	'	'	'	700	'	'
Number of Natural Gas Collection Receipt Points	'	'	'	'	'	'	'	75
Revenues	$77,680	$77,191	$157,918	$139,790	$7,300	$14,300	'	'
Net Income (Loss) Attributable to Parent	($1,667)	($22,114)	($1,267)	($25,667)	$3,100	$7,800	'	'

Acquisitions_and_Divestitures_5

Acquisitions and Divestitures Madison Divestiture (Details) (USD $)	3 Months Ended		6 Months Ended		3 Months Ended	12 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Dec. 31, 2013
					Madison [Member]	Madison [Member]
Significant Acquisitions and Disposals [Line Items]	'	'	'	'	'	'
Proceeds from Sale of Property, Plant, and Equipment	'	'	$6,202	$0	$6,100	'
Impairment of Long-Lived Assets Held-for-use	0	15,232	0	15,232	'	3,000
Property, Plant and Equipment, Gross	'	'	'	'	'	$6,100

Discontinued_Operations_Detail

Discontinued Operations (Details) (USD $)	3 Months Ended		6 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Dec. 31, 2013
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]	'	'	'	'	'
Impairment of Long-Lived Assets to be Disposed of	$700	'	$673	$1,807	'
Disposal Group, Including Discontinued Operation, Revenue	212	609	449	1,128	'
Disposal Group, Including Discontinued Operation, Operating Expense	-268	-671	-545	-1,196	'
Disposal Group, Including Discontinued Operation, Impairment	-673	-1,807	-673	-1,807	'
Unbilled revenue	25,202	'	25,202	'	23,001
Noncurrent assets held for sale, net	1,148	'	1,148	'	1,723
Property, Plant and Equipment, Net	381,318	'	381,318	'	312,701
Gas Purchase Payable, Current	17,256	'	17,256	'	17,386
Discontinued Operation, Tax Effect of Discontinued Operation	288	0	300	0	'
Loss from operations of disposal groups, net of tax	-506	-1,869	-556	-1,875	'
Income (Loss) from Discontinued Operations, Net of Tax, Per Outstanding Limited Partnership Unit, Basic	($0.04)	($0.20)	($0.05)	($0.19)	'
Discontinued Operation, Gain (Loss) on Disposal of Discontinued Operation, Net of Tax	-65	0	-87	0	'
Disposal Groups, Including Discontinued Operations, Name [Domain]	'	'	'	'	'
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]	'	'	'	'	'
Impairment of Long-Lived Assets to be Disposed of	$400	'	'	'	'

Concentration_of_Credit_Risk_a2

Concentration of Credit Risk and Trade Accounts Receivable (Details)	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Concentration Risk [Line Items]	'	'	'	'
Entity-Wide Revenue, Major Customer, Percentage	100.00%	100.00%	100.00%	100.00%
Customer A [Member]	'	'	'	'
Concentration Risk [Line Items]	'	'	'	'
Entity-Wide Revenue, Major Customer, Percentage	26.00%	24.00%	27.00%	27.00%
Customer B [Member]	'	'	'	'
Concentration Risk [Line Items]	'	'	'	'
Entity-Wide Revenue, Major Customer, Percentage	14.00%	11.00%	14.00%	12.00%
Cusotmer C [Member]	'	'	'	'
Concentration Risk [Line Items]	'	'	'	'
Entity-Wide Revenue, Major Customer, Percentage	11.00%	12.00%	10.00%	13.00%
Cusotmer D [Member]	'	'	'	'
Concentration Risk [Line Items]	'	'	'	'
Entity-Wide Revenue, Major Customer, Percentage	10.00%	0.00%	10.00%	10.00%
Customer Other [Member]	'	'	'	'
Concentration Risk [Line Items]	'	'	'	'
Entity-Wide Revenue, Major Customer, Percentage	39.00%	53.00%	39.00%	38.00%

Derivatives_Fair_Value_of_Comm

Derivatives (Fair Value of Commodity Derivatives) (Details) (USD $)	Jun. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Derivative [Line Items]	'	'
Gross Risk Management Assets	$885	$473
Gross Risk Management Liabilities	0	0
Net Risk Management Assets (Liabilities)	885	473
Gross Risk Management Assets	153	27
Gross Risk Management Liabilities	-791	-551
Net Risk Management Assets (Liabilities)	638	524
Risk Management Assets [Member] | Commodity derivatives [Member]	'	'
Derivative [Line Items]	'	'
Gross Risk Management Assets	885	473
Gross Risk Management Liabilities	0	0
Net Risk Management Assets (Liabilities)	885	473
Risk Management Assets - Long Term [Member] | Commodity derivatives [Member]	'	'
Derivative [Line Items]	'	'
Gross Risk Management Assets	0	0
Gross Risk Management Liabilities	0	0
Net Risk Management Assets (Liabilities)	0	0
Risk Management Liabilities [Member] | Commodity derivatives [Member]	'	'
Derivative [Line Items]	'	'
Gross Risk Management Assets	153	27
Gross Risk Management Liabilities	-755	-450
Net Risk Management Assets (Liabilities)	602	423
Risk Management Liabilities - Long Term [Member] | Commodity derivatives [Member]	'	'
Derivative [Line Items]	'	'
Gross Risk Management Assets	0	0
Gross Risk Management Liabilities	-36	-101
Net Risk Management Assets (Liabilities)	$36	$101

Derivatives_Realized_and_Unrea

Derivatives (Realized and Unrealized Gains (Losses)) (Details) (USD $)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Commodity derivatives [Member]	'	'	'	'
Derivatives, Fair Value [Line Items]	'	'	'	'
Derivative, Loss on Derivative	($458)	'	($948)	'
Derivative, Cash Received on Hedge	'	-265	'	-441
Gain on commodity derivatives, net	-75	236	-113	-245
Gain (Loss) on Derivative Instruments [Member] | Commodity derivatives [Member]	'	'	'	'
Derivatives, Fair Value [Line Items]	'	'	'	'
Derivative, Loss on Derivative	-80	'	-182	'
Derivative, Cash Received on Hedge	'	-360	'	-536
Gain on commodity derivatives, net	-113	554	-141	73
Interest Expense [Member]	'	'	'	'
Derivatives, Fair Value [Line Items]	'	'	'	'
Derivative, Loss on Derivative	-109	'	-213	'
Derivative, Cash Received on Hedge	'	0	'	0
Gain on commodity derivatives, net	38	-318	28	-318
Other Income [Member]	'	'	'	'
Derivatives, Fair Value [Line Items]	'	'	'	'
Derivative, Loss on Derivative	-269	-95	-553	-95
Gain on commodity derivatives, net	$0	$0	$0	$0

Derivatives_Details_Textual

Derivatives (Details Textual) (USD $)	6 Months Ended				3 Months Ended	12 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Dec. 31, 2013	Dec. 31, 2013	Jun. 30, 2014	Dec. 31, 2013
			gal	Interest Rate Swap [Member]	Weather Contract [Member]	Weather Contract [Member]
Derivative [Line Items]	'	'	'	'	'	'
Aggregate notional volume of our commodity derivative	'	'	4,700,000	'	'	'
Notional amount of interest rate swap	'	'	'	$100,000,000	'	'
Potential proceeds from derivative contract	'	'	'	'	'	10,000,000
Fair value of derivative	'	'	'	'	'	0
Payment for weather derivative premium	'	'	'	'	-1,100,000	-1,000,000
Derivative term of contract	'	'	'	'	'1 year 0 months 0 days	'
Amortization of Weather Derivative Premium	$554,000	$95,000	'	'	$900,000	'

Fair_Value_Measurement_Details

Fair Value Measurement (Details) (USD $)	Jun. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Commodity Contract [Member]	'	'
Derivatives, Fair Value [Line Items]	'	'
Estimated Fair Value	($211)	($70)
Commodity Contract [Member] | Estimate of Fair Value, Fair Value Disclosure [Member]	'	'
Derivatives, Fair Value [Line Items]	'	'
Estimated Fair Value	-211	-70
Commodity Contract [Member] | Level 1 [Member] | Estimate of Fair Value, Fair Value Disclosure [Member]	'	'
Derivatives, Fair Value [Line Items]	'	'
Estimated Fair Value	0	0
Commodity Contract [Member] | Level 2 [Member] | Estimate of Fair Value, Fair Value Disclosure [Member]	'	'
Derivatives, Fair Value [Line Items]	'	'
Estimated Fair Value	-211	-70
Commodity Contract [Member] | Level 3 [Member] | Estimate of Fair Value, Fair Value Disclosure [Member]	'	'
Derivatives, Fair Value [Line Items]	'	'
Estimated Fair Value	0	0
Interest Rate Swap [Member]	'	'
Derivatives, Fair Value [Line Items]	'	'
Estimated Fair Value	-426	-454
Interest Rate Swap [Member] | Estimate of Fair Value, Fair Value Disclosure [Member]	'	'
Derivatives, Fair Value [Line Items]	'	'
Estimated Fair Value	-426	-454
Interest Rate Swap [Member] | Level 1 [Member] | Estimate of Fair Value, Fair Value Disclosure [Member]	'	'
Derivatives, Fair Value [Line Items]	'	'
Estimated Fair Value	0	0
Interest Rate Swap [Member] | Level 2 [Member] | Estimate of Fair Value, Fair Value Disclosure [Member]	'	'
Derivatives, Fair Value [Line Items]	'	'
Estimated Fair Value	-426	-454
Interest Rate Swap [Member] | Level 3 [Member] | Estimate of Fair Value, Fair Value Disclosure [Member]	'	'
Derivatives, Fair Value [Line Items]	'	'
Estimated Fair Value	$0	$0

Property_Plant_and_Equipment_D

Property, Plant and Equipment (Details) (USD $)

Jun. 30, 2014

Dec. 31, 2013

Jun. 30, 2014

Dec. 31, 2013

Jun. 30, 2014

Dec. 31, 2013

Jun. 30, 2014

Dec. 31, 2013

Jun. 30, 2014

Dec. 31, 2013

Jun. 30, 2014

Dec. 31, 2013

Jun. 30, 2014

Dec. 31, 2013

Jun. 30, 2014

Dec. 31, 2013

Jun. 30, 2014

Dec. 31, 2013

Jun. 30, 2014

Dec. 31, 2013

Jun. 30, 2014

Dec. 31, 2013

Jun. 30, 2014

Dec. 31, 2013

Jun. 30, 2014

Dec. 31, 2013

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

In Thousands, unless otherwise specified

Land [Member]

Land [Member]

Construction in progress [Member]

Construction in progress [Member]

Base gas [Member]

Base gas [Member]

Buildings and improvements [Member]

Buildings and improvements [Member]

Processing and treating plants [Member]

Processing and treating plants [Member]

Pipelines [Member]

Pipelines [Member]

Compressors [Member]

Compressors [Member]

Equipment [Member]

Equipment [Member]

Computer software [Member]

Computer software [Member]

Property, Plant And Equipment [Member]

Property, Plant And Equipment [Member]

Dock [Member]

Dock [Member]

Tanks, truck rack and piping [Member]

Tanks, truck rack and piping [Member]

Maximum [Member]

Maximum [Member]

Maximum [Member]

Maximum [Member]

Maximum [Member]

Maximum [Member]

Minimum [Member]

Minimum [Member]

Minimum [Member]

Minimum [Member]

Minimum [Member]

Buildings and improvements [Member]

Processing and treating plants [Member]

Pipelines [Member]

Compressors [Member]

Equipment [Member]

Computer software [Member]

Buildings and improvements [Member]

Processing and treating plants [Member]

Pipelines [Member]

Compressors [Member]

Equipment [Member]

Property, Plant and Equipment, Net [Abstract]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Property plant and equipment gross

'

'

$6,133

$6,015

$20,305

$6,443

$1,108

$1,108

$5,299

$5,109

$98,404

$97,106

$298,168

$239,865

$12,488

$11,955

$8,497

$6,294

$3,595

$3,531

'

$407,800

$7,954

$7,942

$22,432

$22,432

'

'

'

'

'

'

'

'

'

'

'

Property plant and equipment in useful life

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'40 years

'40 years

'40 years

'20 years

'20 years

'5 years

'4 years

'8 years

'5 years

'4 years

'8 years

Accumulated depreciation

-103,065

-95,099

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Property, plant and equipment, net

$381,318

$312,701

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

$484,383

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Property_Plant_and_Equipment_D1

Property, Plant and Equipment (Details Textual) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Dec. 31, 2013	Dec. 31, 2012
					AlaTenn system [Member]	AlaTenn system [Member]
Property, Plant and Equipment [Line Items]	'	'	'	'	'	'
Property plant and equipment gross	'	'	'	'	$101,400,000	$100,500,000
Capitalized interest	100,000	100,000	200,000	100,000	'	'
Depreciation	4,700,000	6,800,000	11,100,000	12,400,000	'	'
Insurance proceeds from involuntary conversion of property, plant and equipment	'	'	0	482,000	'	'
Gain on involuntary conversion of property, plant and equipment	$0	$0	$0	$343,000	'	'

Debt_Obligations_Details

Debt Obligations (Details) (USD $)	Jun. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Debt Disclosure [Abstract]	'	'
Revolving credit facility	$136,500	$130,735
Other debt	574	2,048
Long-term debt	137,074	132,783
Less: current portion	574	2,048
Long- term debt	$136,500	$130,735

Debt_Obligations_Details_Textu

Debt Obligations (Details Textual) (USD $)	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Dec. 31, 2013	Mar. 31, 2013
Debt Instrument [Line Items]	'	'	'	'
Line of Credit Facility, Amount Outstanding Limit	$200,000,000	'	'	'
Long-Term Debt (Textual) [Abstract]	'	'	'	'
Letter of credit outstanding	4,300,000	'	4,800,000	'
Payments on long-term debt	75,220,000	56,546,000	'	'
Revolving credit facility	136,500,000	'	130,735,000	'
Ratio of Indebtedness to Net Capital	3.51	'	'	'
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage	0.50%	'	'	'
Debt Instrument, Interest Coverage Ratio	2.5	'	'	'
Debt, Weighted Average Interest Rate	4.18%	'	'	4.48%
Line of Credit Facility, Remaining Borrowing Capacity	59,200,000	'	'	'
Proceeds from (Payments for) Other Financing Activities	2,500,000	'	'	'
Debt Instrument, Periodic Payment	300,000	'	'	'
Debt Issuance Cost	$6,600,000	'	'	'
Maximum [Member]	'	'	'	'
Long-Term Debt (Textual) [Abstract]	'	'	'	'
Ratio of Indebtedness to Net Capital	5.75	'	'	'
Federal Funds [Member]	'	'	'	'
Long-Term Debt (Textual) [Abstract]	'	'	'	'
Debt Instrument, Interest Rate, Stated Percentage	0.50%	'	'	'
Eurodollar [Member]	'	'	'	'
Long-Term Debt (Textual) [Abstract]	'	'	'	'
Debt Instrument, Interest Rate, Stated Percentage	1.00%	'	'	'
Insurance Premium Financing [Member]	'	'	'	'
Long-Term Debt (Textual) [Abstract]	'	'	'	'
Debt Instrument, Interest Rate, Stated Percentage	3.95%	'	'	'
Fiscal Quarter Ending December 31, 2014 [Member] | Debt Instrument, Fourth Amendment [Member] | Base Rate [Member] | Maximum [Member]	'	'	'	'
Long-Term Debt (Textual) [Abstract]	'	'	'	'
Debt Instrument, Basis Spread on Variable Rate	3.75%	'	'	'
Fiscal Quarter Ending December 31, 2014 [Member] | Debt Instrument, Fourth Amendment [Member] | Base Rate [Member] | Minimum [Member]	'	'	'	'
Long-Term Debt (Textual) [Abstract]	'	'	'	'
Debt Instrument, Basis Spread on Variable Rate	1.50%	'	'	'
Fiscal Quarter Ending December 31, 2014 [Member] | Debt Instrument, Fourth Amendment [Member] | Eurodollar [Member] | Maximum [Member]	'	'	'	'
Long-Term Debt (Textual) [Abstract]	'	'	'	'
Debt Instrument, Basis Spread on Variable Rate	4.75%	'	'	'
Fiscal Quarter Ending December 31, 2014 [Member] | Debt Instrument, Fourth Amendment [Member] | Eurodollar [Member] | Minimum [Member]	'	'	'	'
Long-Term Debt (Textual) [Abstract]	'	'	'	'
Debt Instrument, Basis Spread on Variable Rate	2.50%	'	'	'

Partners_Capital_Details

Partners' Capital (Details) (USD $)	3 Months Ended		6 Months Ended
In Thousands, except Share data, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Aug. 07, 2014	Feb. 07, 2014	Dec. 31, 2013
Temporary Equity, Shares Outstanding	5,430,455	'	5,430,455	'	5,430,455	'	5,279,000
Less: Comprehensive income attributable to noncontrolling interests	$66	$188	$174	$343	'	'	'
General partner interest units	235,129	'	235,129	'	'	'	185,000
Limited Partners' Capital Account, Units Outstanding	11,139,729	'	11,139,729	'	'	'	7,414,000
General partner interest, units issued	235,129	'	235,129	'	'	49,678	185,000
AIM Midstream Holdings No. of units outstanding [Member]	'	'	'	'	'	'	'
Limited Partners' Capital Account, Units Outstanding	'	'	'	'	'	'	7,414,000
Limited partner subordinated units	'	'	'	'	'	'	185,000
Series B [Member]	'	'	'	'	'	'	'
Limited Partners' Capital Account, Units Outstanding	1,210,221	'	1,210,221	'	1,210,221	'	0

Partners_Capital_Details_Textu

Partners Capital (Details Textual) (USD $)

3 Months Ended

6 Months Ended

6 Months Ended

3 Months Ended

6 Months Ended

3 Months Ended

6 Months Ended

6 Months Ended

Jun. 30, 2014

Jun. 30, 2013

Jun. 30, 2014

Jun. 30, 2013

Feb. 21, 2014

Feb. 07, 2014

Feb. 05, 2014

Jan. 29, 2014

Dec. 31, 2013

Dec. 31, 2013

Jul. 14, 2014

Jun. 30, 2014

Jun. 30, 2013

Jun. 30, 2014

Jun. 30, 2013

Jun. 30, 2014

Jun. 30, 2013

Jun. 30, 2014

Jun. 30, 2013

Jun. 30, 2014

Jun. 30, 2013

Jun. 30, 2014

Jun. 30, 2013

Jan. 31, 2014

Dec. 31, 2013

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2013

Jun. 30, 2014

Partnership Interest [Member]

Subsequent Event [Member]

Series B [Member]

Series B [Member]

Limited Partner [Member]

Limited Partner [Member]

General Partner [Member]

General Partner [Member]

General Partner [Member]

General Partner [Member]

Series B [Member]

Series B [Member]

Series B [Member]

Series B [Member]

Series B [Member]

Series B [Member]

Series B [Member]

Dividend Declared [Member]

Dividend Declared [Member]

Dividend Paid [Member]

General Partner [Member]

General Partner [Member]

Series B [Member]

Subsidiary, Sale of Stock [Line Items]

'

'

'

'

'

'

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'

'

'

'

'

'

'

'

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'

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'

'

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'

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'

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'

'

'

Distribution Made to Limited Partner, Cash Distributions Paid

$5,800,000

$3,700,000

$11,100,000

'

'

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'

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'

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'

'

'

'

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Distributed Earnings

'

'

13,793,000

7,805,000

'

'

'

'

'

'

'

'

'

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'

'

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'

'

'

'

'

'

'

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'

'

Warrants Not Settleable in Cash, Fair Value Disclosure

'

'

'

'

23.89

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Incentive Distribution, Distribution

500,000

'

900,000

'

'

'

'

'

'

'

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'

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'

'

'

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'

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'

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'

'

'

Partners' Capital Account, Distributions

'

'

19,285,000

9,952,000

'

'

'

'

'

'

'

0

0

18,093,000

9,749,000

603,000

80,000

1,192,000

203,000

560,000

0

1,052,000

0

'

'

'

1,085,000

160,000

'

Partners Capital (Textual) [Abstract]

'

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'

'

General partner interest

'

'

1.30%

'

'

'

'

'

'

'

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'

'

'

'

'

'

'

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'

'

'

Limited Liability Company (LLC) or Limited Partnership (LP), Members or Limited Partners, Ownership Interest

'

'

98.70%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Payments on long-term debt

'

'

75,220,000

56,546,000

'

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'

'

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'

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'

'

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'

'

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'

'

'

Series A convertible preferred units

100,571,000

'

100,571,000

'

'

'

'

'

94,811,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Limited Partners' Capital Account, Units Issued

11,139,729

'

11,139,729

'

'

'

'

3,400,000

7,414,000

'

7,613,247

'

'

'

'

'

'

'

'

1,210,221

'

1,210,221

'

1,168,225

0

'

'

'

41,996

Partners' Capital Account, Private Placement of Units

'

'

'

'

'

'

'

'

'

'

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'

'

'

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'

'

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1,100,000

'

'

'

Other Ownership Interests, Units Outstanding

'

'

'

'

'

'

'

'

'

185,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Unitholder contributions

'

'

1,276,000

'

'

'

'

'

'

'

'

0

0

0

0

'

'

1,276,000

22,696,000

'

'

'

'

'

'

'

'

'

'

Series B Conversion Period

'

'

'2 years 0 months 0 days

'

'

'

'

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'

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'

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Sale of Stock, Price Per Share

$26.75

'

$26.75

'

'

'

'

'

'

'

$26.27

'

'

'

'

'

'

'

'

'

'

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'

'

'

Partners' Capital Account, Public Sale of Units Net of Offering Costs

'

'

86,904,000

0

'

'

'

'

'

'

'

0

'

86,904,000

'

'

'

0

'

'

'

-30,000,000

0

'

'

'

'

'

'

Accrued Unitholder Distributions

'

'

5,760,000

2,146,000

'

'

'

'

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'

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'

'

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'

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'

Fair value, paid in kind distributions

$3,900,000

'

'

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'

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General Partners' Capital Account, Units Issued

235,129

'

235,129

'

'

49,678

'

'

185,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Class of Warrant or Right, Number of Securities Called by Warrants or Rights

'

'

'

'

300,000

'

300,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

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'

'

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'

'

'

Stock and Warrants Issued During Period, Value, Preferred Stock and Warrants

'

'

$0

'

'

'

'

'

'

'

'

$0

'

$7,164,000

'

'

'

$7,164,000

'

'

'

'

'

'

'

'

'

'

'

Class of Warrant or Right, Exercise Price of Warrants or Rights

'

'

'

'

'

'

$0.01

'

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'

'

'

Partners_Capital_Calculation_o

Partners' Capital (Calculation of Net Income (Loss) Per Limited Partner Unit) (Details) (USD $)	3 Months Ended		6 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]	'	'	'	'
Distribution Made to Limited Partner, Cash Distributions Paid	$5,800	$3,700	$11,100	'
Income (Loss) from Continuing Operations Attributable to Parent	-1,161	-20,245	-711	-23,792
Temporary Equity, Dividends, Adjustment	3,917	17,760	7,098	17,760
Income (loss) from Discontinued Operations, Net of Tax, Available to Limited Partners	-499	-1,846	-549	-1,710
Net Income (Loss) Allocated to Limited Partners, Diluted	-6,591	-38,695	-10,233	-42,036
Net loss from continuing operations	-1,095	-20,057	-537	-23,449
Less: Comprehensive income attributable to noncontrolling interests	66	188	174	343
General partner's distribution	'	'	19,285	9,952
Loss from discontinued operations	11,139	9,198	10,496	9,183
Limited partners’ net (loss) income from continuing operations per unit (basic)	($0.55)	($4.01)	($0.92)	($4.39)
Income (Loss) from Discontinued Operations, Net of Tax, Per Outstanding Limited Partnership Unit, Basic	($0.04)	($0.20)	($0.05)	($0.19)
Limited partners’ net (loss) income per unit (basic)	($0.59)	($4.21)	($0.97)	($4.58)
General Partners' Capital Account, Period Undistributed Income (Loss) From Continuing Operations, Amount	-149	-1,236	-262	-1,386
Net Income (Loss) From Continuing Operatins, Attributable to Limited Partners	-6,092	-36,849	-9,684	-40,326
Series B [Member]	'	'	'	'
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]	'	'	'	'
General partner's distribution	560	0	1,052	0
General Partner [Member]	'	'	'	'
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]	'	'	'	'
General partner's distribution	603	80	1,192	203
Dividend Declared [Member] | General Partner [Member]	'	'	'	'
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]	'	'	'	'
General partner's distribution	'	'	$1,085	$160

LongTerm_Incentive_Plan_Detail

Long-Term Incentive Plan (Details) (USD $)	6 Months Ended		12 Months Ended
In Millions, except Share data, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Dec. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant	685,492	'	855,089
Grants Issued Under Long Term Incentive Plan	'	'	25.00%
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value	$0.80	$1.10	'
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price	$19,730	'	$17,620
Table Summarizes Unit Based Awards	'	'	'
Outstanding, Beginning period	75,529,000	'	'
Granted	180,791,000	'	'
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price	$20,560	'	'
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period	-5,135,000	'	'
Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures and Expirations in Period, Weighted Average Exercise Price	$20,130	'	'
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period	31,829,000	'	'
LTIP vesting, Shares	($19,340)	'	'
Outstanding, Ending period	219,356,000	'	75,529,000
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition	'	'	'3 years 5 months 0 days

Income_Tax_Details

Income Tax (Details) (USD $)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Income Tax Disclosure [Abstract]	'	'	'	'
Income Tax Expense (Benefit), Continuing Operations	($149)	$375	($138)	$375
Effective Income Tax Rate, Continuing Operations	-15.80%	1.80%	-34.60%	1.60%

Commitments_and_Contingencies_

Commitments and Contingencies (Details) (USD $)	6 Months Ended					3 Months Ended	12 Months Ended
	Jun. 30, 2014	Feb. 21, 2014	Feb. 05, 2014	Feb. 05, 2014	Feb. 05, 2014	Jun. 30, 2014	Dec. 31, 2013
				AIM Midstream Holdings [Member]	High Point Infrastructure Partners, LLC [Member]	High Point Infrastructure Partners, LLC [Member]	High Point Infrastructure Partners, LLC [Member]
Registration Payment Arrangement [Line Items]	'	'	'	'	'	'	'
Loss Contingency, Damages Sought	'1.8	'	'	'	'	'	'
Partners' Capital Account, Percentage	'	'	'	5.00%	95.00%	'	'
Incentive Distribution Right Allocation	'	'	'	'	'	100.00%	85.02%
Class of Warrant or Right, Number of Securities Called by Warrants or Rights	'	300,000	300,000	'	'	'	'
Class of Warrant or Right, Exercise Price of Warrants or Rights	'	'	$0.01	'	'	'	'

Related_Party_Transactions_Det

Related- Party Transactions (Details Textual) (American Midstream, L.L.C [Member], USD $)	3 Months Ended		6 Months Ended
In Millions, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
American Midstream, L.L.C [Member]	'	'	'	'
Related Party Transaction [Line Items]	'	'	'	'
General and Administrative Expense	$5.10	$3.80	$10.10	$6.30
Business Development	0.2	0.2	0.7	0.5
Management Fees Revenue	$0.20	'	'	'

Reporting_Segments_Details

Reporting Segments (Details) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Segment information	'	'	'	'
Revenue	$77,873,000	$76,277,000	$158,241,000	$139,181,000
Loss on commodity derivatives, net	-193,000	914,000	-323,000	609,000
Direct operating expenses	-11,044,000	-8,402,000	-20,005,000	-13,277,000
Segment Gross Margin	22,167,000	18,317,000	45,248,000	31,022,000
Selling, general and administrative expenses	5,637,000	4,588,000	11,230,000	8,013,000
Revenues	77,680,000	77,191,000	157,918,000	139,790,000
Natural Gas Midstream Costs	53,818,000	56,965,000	109,039,000	107,234,000
Equity compensation expense	435,000	1,097,000	795,000	1,485,000
Depreciation, Depletion and Amortization	6,012,000	8,748,000	13,644,000	14,394,000
Total operating expenses	76,946,000	79,800,000	154,713,000	144,403,000
Depreciation and accretion expense	4,700,000	6,800,000	11,100,000	12,400,000
Gain on involuntary conversion of property, plant and equipment	0	0	0	343,000
Loss on sale of assets, net	0	0	-21,000	0
Impairment of Long-Lived Assets Held-for-use	0	15,232,000	0	15,232,000
Loss from operations of disposal groups, net of tax	-506,000	-1,869,000	-556,000	-1,875,000
Interest expense	-1,680,000	-2,591,000	-3,583,000	-4,322,000
Income Tax Expense (Benefit), Continuing Operations	149,000	-375,000	138,000	-375,000
Net loss	-1,601,000	-21,926,000	-1,093,000	-25,324,000
Less: Comprehensive income attributable to noncontrolling interests	66,000	188,000	174,000	343,000
Net loss attributable to the Partnership	-1,667,000	-22,114,000	-1,267,000	-25,667,000
Gathering And Processing [Member]	'	'	'	'
Segment information	'	'	'	'
Revenue	50,015,000	52,525,000	101,641,000	100,766,000
Loss on commodity derivatives, net	-193,000	914,000	-323,000	609,000
Direct operating expenses	-5,746,000	-3,637,000	-9,914,000	-7,127,000
Segment Gross Margin	10,481,000	9,077,000	20,610,000	17,784,000
Revenues	49,822,000	53,439,000	101,318,000	101,375,000
Natural Gas Midstream Costs	39,238,000	43,702,000	80,359,000	83,370,000
Transmission [Member]	'	'	'	'
Segment information	'	'	'	'
Revenue	23,960,000	20,886,000	49,088,000	35,549,000
Loss on commodity derivatives, net	0	0	0	0
Direct operating expenses	-3,736,000	-3,556,000	-6,854,000	-4,941,000
Segment Gross Margin	9,350,000	7,583,000	20,363,000	11,581,000
Revenues	23,960,000	20,886,000	49,088,000	35,549,000
Natural Gas Midstream Costs	14,580,000	13,263,000	28,680,000	23,864,000
Terminals [Member]	'	'	'	'
Segment information	'	'	'	'
Revenue	3,898,000	2,866,000	7,512,000	2,866,000
Loss on commodity derivatives, net	0	0	0	0
Direct operating expenses	-1,562,000	-1,209,000	-3,237,000	-1,209,000
Segment Gross Margin	2,336,000	1,657,000	4,275,000	1,657,000
Revenues	'	'	7,512,000	'
Natural Gas Midstream Costs	0	0	0	0
Terminals [Member]	'	'	'	'
Segment information	'	'	'	'
Revenues	$3,898,000	'	'	'

Reporting_Segments_Details_Tex

Reporting Segments (Details Textual)	6 Months Ended
	Jun. 30, 2014
	segment
Segment Reporting Information [Line Items]	'
Number of Operating Segments	3

Subsidiary_Guarantors_Subsidia1

Subsidiary Guarantors Subsidiary Guarantors (Details) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2011	Dec. 31, 2013	Mar. 31, 2013	Dec. 31, 2012
Condensed Financial Statements, Captions [Line Items]	'	'	'	'	'	'	'	'
Subsidiary of Limited Liability Company or Limited Partnership, Ownership Interest	'	'	'	'	100.00%	'	'	'
Net Cash Provided by (Used in) Operating Activities	'	'	($12,411,000)	($12,418,000)	'	'	'	'
Revenue, Net	77,873,000	76,277,000	158,241,000	139,181,000	'	'	'	'
Cash and Cash Equivalents, at Carrying Value	3,007,000	'	3,007,000	'	'	393,000	'	'
Accounts Receivable, Net, Current	7,337,000	'	7,337,000	'	'	6,822,000	'	'
Unbilled revenue	25,202,000	'	25,202,000	'	'	23,001,000	'	'
Derivative Assets, Current	885,000	'	885,000	'	'	473,000	'	'
Other Assets, Current	5,996,000	'	5,996,000	'	'	7,497,000	'	'
Assets Held-for-sale, Current	121,000	'	121,000	'	'	272,000	'	'
Assets, Current	42,548,000	'	42,548,000	'	'	38,458,000	'	'
Derivative Assets, Noncurrent	'	'	'	'	'	0	'	'
Property, Plant and Equipment, Net	381,318,000	'	381,318,000	'	'	312,701,000	'	'
Notes Receivable, Related Parties, Noncurrent	0	'	0	'	'	0	'	'
Goodwill	16,253,000	'	16,253,000	'	'	16,447,000	'	'
Intangible Assets, Net (Excluding Goodwill)	49,522,000	'	49,522,000	'	'	3,682,000	'	'
Other Assets, Noncurrent	8,418,000	'	8,418,000	'	'	9,064,000	'	'
Noncurrent assets held for sale, net	1,148,000	'	1,148,000	'	'	1,723,000	'	'
Investment In Subsidiaries	0	'	0	'	'	0	'	'
Assets	499,207,000	'	499,207,000	'	'	382,075,000	'	'
Accounts Payable, Current	10,538,000	'	10,538,000	'	'	3,261,000	'	'
Gas Purchase Payable, Current	17,256,000	'	17,256,000	'	'	17,386,000	'	'
Accrued Liabilities and Other Liabilities	15,697,000	'	15,697,000	'	'	15,058,000	'	'
Less: current portion	574,000	'	574,000	'	'	2,048,000	'	'
Risk management liabilities	602,000	'	602,000	'	'	423,000	'	'
Liabilities of Disposal Group, Including Discontinued Operation, Current	54,000	'	54,000	'	'	114,000	'	'
Liabilities, Current	44,721,000	'	44,721,000	'	'	38,290,000	'	'
Risk management liabilities	36,000	'	36,000	'	'	101,000	'	'
Asset Retirement Obligation	34,648,000	'	34,648,000	'	'	34,636,000	'	'
Other Liabilities, Noncurrent	229,000	'	229,000	'	'	191,000	'	'
Long-term Debt, Excluding Current Maturities	136,500,000	'	136,500,000	'	'	130,735,000	'	'
Deferred Tax Liabilities, Net	4,694,000	'	4,694,000	'	'	4,749,000	'	'
Liabilities of Disposal Group, Including Discontinued Operation, Noncurrent	0	'	0	'	'	95,000	'	'
Liabilities	220,828,000	'	220,828,000	'	'	208,797,000	'	'
Series A convertible preferred units (5,430 thousand and 5,279 thousand units issued and outstanding as of June 30, 2014, and December 31, 2013, respectively)	100,571,000	'	100,571,000	'	'	94,811,000	'	'
Partners' Capital	173,261,000	52,695,000	173,261,000	52,695,000	'	73,839,000	'	80,165,000
Noncontrolling interests	4,547,000	'	4,547,000	'	'	4,628,000	'	'
Total liabilities and partners’ capital	177,808,000	'	177,808,000	'	'	78,467,000	'	'
Liabilities and Equity	499,207,000	'	499,207,000	'	'	382,075,000	'	'
Loss on commodity derivatives, net	-193,000	914,000	-323,000	609,000	'	'	'	'
Revenues	77,680,000	77,191,000	157,918,000	139,790,000	'	'	'	'
Natural Gas Midstream Costs	53,818,000	56,965,000	109,039,000	107,234,000	'	'	'	'
Direct Operating Costs	11,044,000	8,402,000	20,005,000	13,277,000	'	'	'	'
Selling, General and Administrative Expense	5,637,000	4,588,000	11,230,000	8,013,000	'	'	'	'
Allocated Share-based Compensation Expense	435,000	1,097,000	795,000	1,485,000	'	'	'	'
Depreciation, Depletion and Amortization	6,012,000	8,748,000	13,644,000	14,394,000	'	'	'	'
Total operating expenses	76,946,000	79,800,000	154,713,000	144,403,000	'	'	'	'
Gain on involuntary conversion of property, plant and equipment	0	0	0	343,000	'	'	'	'
Loss on sale of assets, net	0	0	-21,000	0	'	'	'	'
Impairment of Long-Lived Assets Held-for-use	0	-15,232,000	0	-15,232,000	'	'	'	'
Operating income (loss)	734,000	-17,841,000	3,184,000	-19,502,000	'	'	'	'
Earnings from Consolidated Affiliates	0	0	0	0	'	'	'	'
Interest Expense	1,680,000	2,591,000	3,583,000	4,322,000	'	'	'	'
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest	-946,000	-20,432,000	-399,000	-23,824,000	'	'	'	'
Income Tax Expense (Benefit), Continuing Operations	-149,000	375,000	-138,000	375,000	'	'	'	'
Net loss from continuing operations	-1,095,000	-20,057,000	-537,000	-23,449,000	'	'	'	'
Loss from operations of disposal groups, net of tax	-506,000	-1,869,000	-556,000	-1,875,000	'	'	'	'
Net loss	-1,601,000	-21,926,000	-1,093,000	-25,324,000	'	'	'	'
Less: Comprehensive income attributable to noncontrolling interests	66,000	188,000	174,000	343,000	'	'	'	'
Net loss attributable to the Partnership	-1,667,000	-22,114,000	-1,267,000	-25,667,000	'	'	'	'
Unrealized gain (loss) on post retirement benefit plan assets and liabilities	'	'	46,000	'	'	'	'	'
Other comprehensive income (loss)	10,000	-43,000	46,000	-56,000	'	'	'	'
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest	-1,591,000	-21,969,000	-1,047,000	-25,380,000	'	'	'	'
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	-1,657,000	-22,157,000	-1,221,000	-25,723,000	'	'	'	'
Acquisition Costs, Period Cost	'	'	-110,909,000	0	'	'	'	'
Payments to Acquire Property, Plant, and Equipment	'	'	13,229,000	13,606,000	'	'	'	'
Proceeds from Sale of Property, Plant, and Equipment	'	'	6,202,000	0	'	'	'	'
Insurance proceeds from involuntary conversion of property, plant and equipment	'	'	0	482,000	'	'	'	'
Proceeds from Contributions from Affiliates, Investing Activities	'	'	0	0	'	'	'	'
Payments of Distributions to Affiliates, Investing Activities	'	'	0	0	'	'	'	'
Net Cash Provided by (Used in) Investing Activities	'	'	-117,936,000	-13,124,000	'	'	'	'
Proceeds from Partnership Contribution	'	'	1,276,000	575,000	'	'	'	'
Proceeds from Contributions from Affiliates	'	'	0	0	'	'	'	'
Payments of Distributions to Affiliates	'	'	0	0	'	'	'	'
Partners' Capital Account, Public Sale of Units Net of Offering Costs	'	'	86,904,000	0	'	'	'	'
Distribution Made to Limited Partner, Cash Distributions Paid	5,800,000	3,700,000	11,100,000	'	'	'	'	'
Distributed Earnings	'	'	13,793,000	7,805,000	'	'	'	'
Proceeds from Issuance of Convertible Preferred Units	'	'	0	14,393,000	'	'	'	'
Partners' Capital Account, Distributions	'	'	19,285,000	9,952,000	'	'	'	'
Noncontrolling Interest, Decrease from Redemptions or Purchase of Interests	'	'	-8,000	0	'	'	'	'
Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders	'	'	0	0	'	'	'	'
Tax Netting Repurchase	'	'	-151,000	-339,000	'	'	'	'
Payments of Debt Issuance Costs	'	'	154,000	1,315,000	'	'	'	'
Repayments of Notes Payable	'	'	1,644,000	1,139,000	'	'	'	'
Borrowings on other debt	'	'	170,000	1,495,000	'	'	'	'
Repayments of Related Party Debt	'	'	0	-489,000	'	'	'	'
Repayments of Other Debt	'	'	0	1,274,000	'	'	'	'
Payments on long-term debt	'	'	75,220,000	56,546,000	'	'	'	'
Proceeds from Issuance of Long-term Debt	'	'	80,985,000	51,921,000	'	'	'	'
Net Cash Provided by (Used in) Financing Activities	'	'	108,139,000	1,582,000	'	'	'	'
Cash and Cash Equivalents, Period Increase (Decrease)	'	'	2,614,000	876,000	'	'	'	'
Accrued Unitholder Distributions	'	'	5,760,000	2,146,000	'	'	'	'
Dividends, Paid-in-kind	'	'	1,052,000	0	'	'	'	'
Cash and cash equivalents, including discontinued operations	3,007,000	1,452,000	3,007,000	1,452,000	'	393,000	1,452,000	576,000
Interest Paid	'	'	2,718,000	3,049,000	'	'	'	'
Capital Expenditures Incurred but Not yet Paid	'	'	9,501,000	6,023,000	'	'	'	'
Partners' Capital Account, Distributions to Existing Interest	'	'	0	15,612,000	'	'	'	'
Noncontrolling Interest, Ownership Percentage by Parent	92.20%	'	92.20%	'	'	'	'	'
American Midstream Finance Corporation [Member]	'	'	'	'	'	'	'	'
Condensed Financial Statements, Captions [Line Items]	'	'	'	'	'	'	'	'
Subsidiary of Limited Liability Company or Limited Partnership, Ownership Interest	'	'	100.00%	'	'	'	'	'
Parent Company [Member]	'	'	'	'	'	'	'	'
Condensed Financial Statements, Captions [Line Items]	'	'	'	'	'	'	'	'
Net Cash Provided by (Used in) Operating Activities	'	'	0	0	'	'	'	'
Revenue, Net	0	0	0	0	'	'	'	'
Cash and Cash Equivalents, at Carrying Value	1,000	'	1,000	'	'	1,000	'	'
Accounts Receivable, Net, Current	0	'	0	'	'	0	'	'
Unbilled revenue	0	'	0	'	'	0	'	'
Derivative Assets, Current	0	'	0	'	'	0	'	'
Other Assets, Current	0	'	0	'	'	84,000	'	'
Assets Held-for-sale, Current	0	'	0	'	'	0	'	'
Assets, Current	1,000	'	1,000	'	'	85,000	'	'
Derivative Assets, Noncurrent	'	'	'	'	'	0	'	'
Property, Plant and Equipment, Net	0	'	0	'	'	0	'	'
Notes Receivable, Related Parties, Noncurrent	27,315,000	'	27,315,000	'	'	27,315,000	'	'
Goodwill	0	'	0	'	'	0	'	'
Intangible Assets, Net (Excluding Goodwill)	0	'	0	'	'	0	'	'
Other Assets, Noncurrent	0	'	0	'	'	0	'	'
Noncurrent assets held for sale, net	0	'	0	'	'	0	'	'
Investment In Subsidiaries	246,550,000	'	246,550,000	'	'	142,758,000	'	'
Assets	273,866,000	'	273,866,000	'	'	170,158,000	'	'
Accounts Payable, Current	34,000	'	34,000	'	'	30,000	'	'
Gas Purchase Payable, Current	0	'	0	'	'	0	'	'
Accrued Liabilities and Other Liabilities	0	'	0	'	'	1,478,000	'	'
Less: current portion	0	'	0	'	'	0	'	'
Risk management liabilities	0	'	0	'	'	0	'	'
Liabilities of Disposal Group, Including Discontinued Operation, Current	0	'	0	'	'	0	'	'
Liabilities, Current	34,000	'	34,000	'	'	1,508,000	'	'
Risk management liabilities	0	'	0	'	'	0	'	'
Asset Retirement Obligation	0	'	0	'	'	0	'	'
Other Liabilities, Noncurrent	0	'	0	'	'	0	'	'
Long-term Debt, Excluding Current Maturities	0	'	0	'	'	0	'	'
Deferred Tax Liabilities, Net	0	'	0	'	'	0	'	'
Liabilities of Disposal Group, Including Discontinued Operation, Noncurrent	0	'	0	'	'	0	'	'
Liabilities	34,000	'	34,000	'	'	1,508,000	'	'
Series A convertible preferred units (5,430 thousand and 5,279 thousand units issued and outstanding as of June 30, 2014, and December 31, 2013, respectively)	100,571,000	'	100,571,000	'	'	94,811,000	'	'
Partners' Capital	173,261,000	'	173,261,000	'	'	73,839,000	'	'
Noncontrolling interests	0	'	0	'	'	0	'	'
Total liabilities and partners’ capital	173,261,000	'	173,261,000	'	'	73,839,000	'	'
Liabilities and Equity	273,866,000	'	273,866,000	'	'	170,158,000	'	'
Loss on commodity derivatives, net	0	0	0	0	'	'	'	'
Revenues	0	0	0	0	'	'	'	'
Natural Gas Midstream Costs	0	0	0	0	'	'	'	'
Direct Operating Costs	0	0	0	0	'	'	'	'
Selling, General and Administrative Expense	0	0	0	0	'	'	'	'
Allocated Share-based Compensation Expense	0	0	0	0	'	'	'	'
Depreciation, Depletion and Amortization	0	0	0	0	'	'	'	'
Total operating expenses	0	0	0	0	'	'	'	'
Gain on involuntary conversion of property, plant and equipment	'	'	'	0	'	'	'	'
Loss on sale of assets, net	'	'	0	'	'	'	'	'
Impairment of Long-Lived Assets Held-for-use	'	0	'	0	'	'	'	'
Operating income (loss)	0	0	0	0	'	'	'	'
Earnings from Consolidated Affiliates	-2,331,000	-22,114,000	-2,512,000	-25,667,000	'	'	'	'
Interest Income (Expense), Net	664,000	'	-1,245,000	0	'	'	'	'
Interest Expense	'	0	'	'	'	'	'	'
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest	-1,667,000	-22,114,000	-1,267,000	-25,667,000	'	'	'	'
Income Tax Expense (Benefit), Continuing Operations	0	0	0	0	'	'	'	'
Net loss from continuing operations	-1,667,000	-22,114,000	-1,267,000	-25,667,000	'	'	'	'
Loss from operations of disposal groups, net of tax	0	0	0	0	'	'	'	'
Net loss	-1,667,000	-22,114,000	-1,267,000	-25,667,000	'	'	'	'
Less: Comprehensive income attributable to noncontrolling interests	0	0	0	0	'	'	'	'
Net loss attributable to the Partnership	-1,667,000	-22,114,000	-1,267,000	-25,667,000	'	'	'	'
Unrealized gain (loss) on post retirement benefit plan assets and liabilities	10,000	-43,000	46,000	-56,000	'	'	'	'
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest	-1,657,000	-22,157,000	-1,221,000	-25,723,000	'	'	'	'
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	-1,657,000	-22,157,000	-1,221,000	-25,723,000	'	'	'	'
Acquisition Costs, Period Cost	'	'	0	'	'	'	'	'
Payments to Acquire Property, Plant, and Equipment	'	'	0	0	'	'	'	'
Proceeds from Sale of Property, Plant, and Equipment	'	'	0	'	'	'	'	'
Insurance proceeds from involuntary conversion of property, plant and equipment	'	'	'	0	'	'	'	'
Proceeds from Contributions from Affiliates, Investing Activities	'	'	13,793,000	7,805,000	'	'	'	'
Payments of Distributions to Affiliates, Investing Activities	'	'	-118,180,000	-14,705,000	'	'	'	'
Net Cash Provided by (Used in) Investing Activities	'	'	-104,387,000	-6,900,000	'	'	'	'
Proceeds from Partnership Contribution	'	'	1,276,000	312,000	'	'	'	'
Proceeds from Contributions from Affiliates	'	'	0	0	'	'	'	'
Payments of Distributions to Affiliates	'	'	0	0	'	'	'	'
Partners' Capital Account, Public Sale of Units Net of Offering Costs	'	'	-86,904,000	'	'	'	'	'
Distribution Made to Limited Partner, Cash Distributions Paid	'	'	13,793,000	7,805,000	'	'	'	'
Proceeds from Issuance of Convertible Preferred Units	'	'	'	14,393,000	'	'	'	'
Noncontrolling Interest, Decrease from Redemptions or Purchase of Interests	'	'	0	'	'	'	'	'
Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders	'	'	0	0	'	'	'	'
Partners' Capital Account, Treasury Units, Purchased	'	'	0	0	'	'	'	'
Payments of Debt Issuance Costs	'	'	0	0	'	'	'	'
Repayments of Notes Payable	'	'	0	0	'	'	'	'
Borrowings on other debt	'	'	0	0	'	'	'	'
Repayments of Related Party Debt	'	'	'	0	'	'	'	'
Repayments of Other Debt	'	'	'	0	'	'	'	'
Payments on long-term debt	'	'	0	0	'	'	'	'
Proceeds from Issuance of Long-term Debt	'	'	0	0	'	'	'	'
Net Cash Provided by (Used in) Financing Activities	'	'	104,387,000	6,900,000	'	'	'	'
Cash and Cash Equivalents, Period Increase (Decrease)	'	'	0	0	'	'	'	'
Accrued Unitholder Distributions	'	'	5,760,000	2,146,000	'	'	'	'
Dividends, Paid-in-kind	'	'	1,052,000	'	'	'	'	'
Cash and cash equivalents, including discontinued operations	1,000	'	1,000	'	'	1,000	1,000	1,000
Interest Paid	'	'	0	0	'	'	'	'
Capital Expenditures Incurred but Not yet Paid	'	'	0	0	'	'	'	'
Partners' Capital Account, Distributions to Existing Interest	'	'	'	15,612,000	'	'	'	'
Guarantor Subsidiaries [Member]	'	'	'	'	'	'	'	'
Condensed Financial Statements, Captions [Line Items]	'	'	'	'	'	'	'	'
Net Cash Provided by (Used in) Operating Activities	'	'	9,850,000	9,682,000	'	'	'	'
Revenue, Net	67,724,000	64,178,000	139,343,000	115,396,000	'	'	'	'
Cash and Cash Equivalents, at Carrying Value	3,006,000	'	3,006,000	'	'	392,000	'	'
Accounts Receivable, Net, Current	4,329,000	'	4,329,000	'	'	4,461,000	'	'
Unbilled revenue	21,991,000	'	21,991,000	'	'	18,321,000	'	'
Derivative Assets, Current	885,000	'	885,000	'	'	473,000	'	'
Other Assets, Current	5,590,000	'	5,590,000	'	'	6,942,000	'	'
Assets Held-for-sale, Current	121,000	'	121,000	'	'	272,000	'	'
Assets, Current	35,922,000	'	35,922,000	'	'	30,861,000	'	'
Derivative Assets, Noncurrent	'	'	'	'	'	0	'	'
Property, Plant and Equipment, Net	324,347,000	'	324,347,000	'	'	254,656,000	'	'
Notes Receivable, Related Parties, Noncurrent	0	'	0	'	'	0	'	'
Goodwill	16,253,000	'	16,253,000	'	'	16,447,000	'	'
Intangible Assets, Net (Excluding Goodwill)	49,522,000	'	49,522,000	'	'	3,682,000	'	'
Other Assets, Noncurrent	7,714,000	'	7,714,000	'	'	8,321,000	'	'
Noncurrent assets held for sale, net	1,148,000	'	1,148,000	'	'	1,723,000	'	'
Investment In Subsidiaries	56,815,000	'	56,815,000	'	'	57,750,000	'	'
Assets	491,721,000	'	491,721,000	'	'	373,440,000	'	'
Accounts Payable, Current	10,150,000	'	10,150,000	'	'	2,902,000	'	'
Gas Purchase Payable, Current	15,204,000	'	15,204,000	'	'	14,282,000	'	'
Accrued Liabilities and Other Liabilities	15,644,000	'	15,644,000	'	'	13,563,000	'	'
Less: current portion	574,000	'	574,000	'	'	2,048,000	'	'
Risk management liabilities	602,000	'	602,000	'	'	423,000	'	'
Liabilities of Disposal Group, Including Discontinued Operation, Current	54,000	'	54,000	'	'	114,000	'	'
Liabilities, Current	42,228,000	'	42,228,000	'	'	33,332,000	'	'
Risk management liabilities	36,000	'	36,000	'	'	101,000	'	'
Asset Retirement Obligation	34,169,000	'	34,169,000	'	'	34,164,000	'	'
Other Liabilities, Noncurrent	229,000	'	229,000	'	'	191,000	'	'
Long-term Debt, Excluding Current Maturities	163,815,000	'	163,815,000	'	'	158,050,000	'	'
Deferred Tax Liabilities, Net	4,694,000	'	4,694,000	'	'	4,749,000	'	'
Liabilities of Disposal Group, Including Discontinued Operation, Noncurrent	0	'	0	'	'	95,000	'	'
Liabilities	245,171,000	'	245,171,000	'	'	230,682,000	'	'
Series A convertible preferred units (5,430 thousand and 5,279 thousand units issued and outstanding as of June 30, 2014, and December 31, 2013, respectively)	0	'	0	'	'	0	'	'
Partners' Capital	246,550,000	'	246,550,000	'	'	142,758,000	'	'
Noncontrolling interests	0	'	0	'	'	0	'	'
Total liabilities and partners’ capital	246,550,000	'	246,550,000	'	'	142,758,000	'	'
Liabilities and Equity	491,721,000	'	491,721,000	'	'	373,440,000	'	'
Loss on commodity derivatives, net	-130,000	914,000	-233,000	609,000	'	'	'	'
Revenues	67,594,000	65,092,000	139,110,000	116,005,000	'	'	'	'
Natural Gas Midstream Costs	46,142,000	47,902,000	95,014,000	89,216,000	'	'	'	'
Direct Operating Costs	9,901,000	7,285,000	17,840,000	11,074,000	'	'	'	'
Selling, General and Administrative Expense	5,637,000	4,588,000	11,230,000	8,013,000	'	'	'	'
Allocated Share-based Compensation Expense	435,000	1,097,000	795,000	1,485,000	'	'	'	'
Depreciation, Depletion and Amortization	5,587,000	8,334,000	12,799,000	13,566,000	'	'	'	'
Total operating expenses	67,702,000	69,206,000	137,678,000	123,354,000	'	'	'	'
Gain on involuntary conversion of property, plant and equipment	'	'	'	343,000	'	'	'	'
Loss on sale of assets, net	'	'	-21,000	'	'	'	'	'
Impairment of Long-Lived Assets Held-for-use	'	-15,232,000	'	-15,232,000	'	'	'	'
Operating income (loss)	-108,000	-19,346,000	1,411,000	-22,238,000	'	'	'	'
Earnings from Consolidated Affiliates	776,000	1,317,000	1,599,000	2,393,000	'	'	'	'
Interest Income (Expense), Net	-2,344,000	'	4,828,000	4,322,000	'	'	'	'
Interest Expense	'	2,591,000	'	'	'	'	'	'
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest	-1,676,000	-20,620,000	-1,818,000	-24,167,000	'	'	'	'
Income Tax Expense (Benefit), Continuing Operations	149,000	375,000	138,000	-375,000	'	'	'	'
Net loss from continuing operations	-1,825,000	-20,245,000	-1,956,000	-23,792,000	'	'	'	'
Loss from operations of disposal groups, net of tax	-506,000	-1,869,000	-556,000	-1,875,000	'	'	'	'
Net loss	-2,331,000	-22,114,000	-2,512,000	-25,667,000	'	'	'	'
Less: Comprehensive income attributable to noncontrolling interests	0	0	0	0	'	'	'	'
Net loss attributable to the Partnership	-2,331,000	-22,114,000	-2,512,000	-25,667,000	'	'	'	'
Unrealized gain (loss) on post retirement benefit plan assets and liabilities	10,000	-43,000	46,000	-56,000	'	'	'	'
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest	-2,321,000	-22,157,000	-2,466,000	-25,723,000	'	'	'	'
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	-2,321,000	-22,157,000	-2,466,000	-25,723,000	'	'	'	'
Acquisition Costs, Period Cost	'	'	-110,909,000	'	'	'	'	'
Payments to Acquire Property, Plant, and Equipment	'	'	13,458,000	13,605,000	'	'	'	'
Proceeds from Sale of Property, Plant, and Equipment	'	'	6,202,000	'	'	'	'	'
Insurance proceeds from involuntary conversion of property, plant and equipment	'	'	'	482,000	'	'	'	'
Proceeds from Contributions from Affiliates, Investing Activities	'	'	0	0	'	'	'	'
Payments of Distributions to Affiliates, Investing Activities	'	'	0	0	'	'	'	'
Net Cash Provided by (Used in) Investing Activities	'	'	-118,165,000	-13,123,000	'	'	'	'
Proceeds from Partnership Contribution	'	'	0	263,000	'	'	'	'
Proceeds from Contributions from Affiliates	'	'	118,180,000	14,705,000	'	'	'	'
Payments of Distributions to Affiliates	'	'	11,228,000	5,513,000	'	'	'	'
Partners' Capital Account, Public Sale of Units Net of Offering Costs	'	'	0	'	'	'	'	'
Distribution Made to Limited Partner, Cash Distributions Paid	'	'	0	0	'	'	'	'
Proceeds from Issuance of Convertible Preferred Units	'	'	'	0	'	'	'	'
Noncontrolling Interest, Decrease from Redemptions or Purchase of Interests	'	'	-8,000	'	'	'	'	'
Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders	'	'	1,000	0	'	'	'	'
Partners' Capital Account, Treasury Units, Purchased	'	'	-151,000	-339,000	'	'	'	'
Payments of Debt Issuance Costs	'	'	154,000	1,315,000	'	'	'	'
Repayments of Notes Payable	'	'	1,644,000	1,139,000	'	'	'	'
Borrowings on other debt	'	'	170,000	1,495,000	'	'	'	'
Repayments of Related Party Debt	'	'	'	-489,000	'	'	'	'
Repayments of Other Debt	'	'	'	1,274,000	'	'	'	'
Payments on long-term debt	'	'	75,220,000	56,546,000	'	'	'	'
Proceeds from Issuance of Long-term Debt	'	'	80,985,000	51,921,000	'	'	'	'
Net Cash Provided by (Used in) Financing Activities	'	'	110,929,000	4,317,000	'	'	'	'
Cash and Cash Equivalents, Period Increase (Decrease)	'	'	2,614,000	876,000	'	'	'	'
Accrued Unitholder Distributions	'	'	0	0	'	'	'	'
Dividends, Paid-in-kind	'	'	0	'	'	'	'	'
Cash and cash equivalents, including discontinued operations	3,006,000	'	3,006,000	'	'	392,000	1,451,000	575,000
Interest Paid	'	'	2,718,000	3,049,000	'	'	'	'
Capital Expenditures Incurred but Not yet Paid	'	'	9,501,000	6,023,000	'	'	'	'
Noncash or Part Noncash Acquisition, Net Nonmonetary Assets Acquired (Liabilities Assumed)	'	'	'	0	'	'	'	'
Partners' Capital Account, Distributions to Existing Interest	'	'	'	0	'	'	'	'
Non-Guarantor Subsidiaries [Member]	'	'	'	'	'	'	'	'
Condensed Financial Statements, Captions [Line Items]	'	'	'	'	'	'	'	'
Net Cash Provided by (Used in) Operating Activities	'	'	2,561,000	2,736,000	'	'	'	'
Revenue, Net	12,493,000	13,607,000	24,060,000	27,256,000	'	'	'	'
Cash and Cash Equivalents, at Carrying Value	0	'	0	'	'	0	'	'
Accounts Receivable, Net, Current	3,008,000	'	3,008,000	'	'	2,361,000	'	'
Unbilled revenue	3,211,000	'	3,211,000	'	'	4,680,000	'	'
Derivative Assets, Current	0	'	0	'	'	0	'	'
Other Assets, Current	406,000	'	406,000	'	'	555,000	'	'
Assets Held-for-sale, Current	0	'	0	'	'	0	'	'
Assets, Current	6,625,000	'	6,625,000	'	'	7,596,000	'	'
Derivative Assets, Noncurrent	'	'	'	'	'	0	'	'
Property, Plant and Equipment, Net	56,971,000	'	56,971,000	'	'	58,045,000	'	'
Notes Receivable, Related Parties, Noncurrent	0	'	0	'	'	0	'	'
Goodwill	0	'	0	'	'	0	'	'
Intangible Assets, Net (Excluding Goodwill)	0	'	0	'	'	0	'	'
Other Assets, Noncurrent	704,000	'	704,000	'	'	743,000	'	'
Noncurrent assets held for sale, net	0	'	0	'	'	0	'	'
Investment In Subsidiaries	0	'	0	'	'	0	'	'
Assets	64,300,000	'	64,300,000	'	'	66,384,000	'	'
Accounts Payable, Current	354,000	'	354,000	'	'	329,000	'	'
Gas Purchase Payable, Current	2,052,000	'	2,052,000	'	'	3,104,000	'	'
Accrued Liabilities and Other Liabilities	53,000	'	53,000	'	'	101,000	'	'
Less: current portion	0	'	0	'	'	0	'	'
Risk management liabilities	0	'	0	'	'	0	'	'
Liabilities of Disposal Group, Including Discontinued Operation, Current	0	'	0	'	'	0	'	'
Liabilities, Current	2,459,000	'	2,459,000	'	'	3,534,000	'	'
Risk management liabilities	0	'	0	'	'	0	'	'
Asset Retirement Obligation	479,000	'	479,000	'	'	472,000	'	'
Other Liabilities, Noncurrent	0	'	0	'	'	0	'	'
Long-term Debt, Excluding Current Maturities	0	'	0	'	'	0	'	'
Deferred Tax Liabilities, Net	0	'	0	'	'	0	'	'
Liabilities of Disposal Group, Including Discontinued Operation, Noncurrent	0	'	0	'	'	0	'	'
Liabilities	2,938,000	'	2,938,000	'	'	4,006,000	'	'
Series A convertible preferred units (5,430 thousand and 5,279 thousand units issued and outstanding as of June 30, 2014, and December 31, 2013, respectively)	0	'	0	'	'	0	'	'
Partners' Capital	56,815,000	'	56,815,000	'	'	57,750,000	'	'
Noncontrolling interests	4,547,000	'	4,547,000	'	'	4,628,000	'	'
Total liabilities and partners’ capital	61,362,000	'	61,362,000	'	'	62,378,000	'	'
Liabilities and Equity	64,300,000	'	64,300,000	'	'	66,384,000	'	'
Loss on commodity derivatives, net	-63,000	0	-90,000	0	'	'	'	'
Revenues	12,430,000	13,607,000	23,970,000	27,256,000	'	'	'	'
Natural Gas Midstream Costs	10,020,000	10,571,000	19,187,000	21,489,000	'	'	'	'
Direct Operating Costs	1,143,000	1,117,000	2,165,000	2,203,000	'	'	'	'
Selling, General and Administrative Expense	0	0	0	0	'	'	'	'
Allocated Share-based Compensation Expense	0	0	0	0	'	'	'	'
Depreciation, Depletion and Amortization	425,000	414,000	845,000	828,000	'	'	'	'
Total operating expenses	11,588,000	12,102,000	22,197,000	24,520,000	'	'	'	'
Gain on involuntary conversion of property, plant and equipment	'	'	'	0	'	'	'	'
Loss on sale of assets, net	'	'	0	'	'	'	'	'
Impairment of Long-Lived Assets Held-for-use	'	0	'	0	'	'	'	'
Operating income (loss)	842,000	1,505,000	1,773,000	2,736,000	'	'	'	'
Earnings from Consolidated Affiliates	0	0	0	0	'	'	'	'
Interest Expense	0	0	0	0	'	'	'	'
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest	842,000	1,505,000	1,773,000	2,736,000	'	'	'	'
Income Tax Expense (Benefit), Continuing Operations	0	0	0	0	'	'	'	'
Net loss from continuing operations	842,000	1,505,000	1,773,000	2,736,000	'	'	'	'
Loss from operations of disposal groups, net of tax	0	0	0	0	'	'	'	'
Net loss	842,000	1,505,000	1,773,000	2,736,000	'	'	'	'
Less: Comprehensive income attributable to noncontrolling interests	66,000	188,000	174,000	343,000	'	'	'	'
Net loss attributable to the Partnership	776,000	1,317,000	1,599,000	2,393,000	'	'	'	'
Unrealized gain (loss) on post retirement benefit plan assets and liabilities	0	0	0	0	'	'	'	'
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest	842,000	1,505,000	1,773,000	2,736,000	'	'	'	'
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	776,000	1,317,000	1,599,000	2,393,000	'	'	'	'
Acquisition Costs, Period Cost	'	'	0	'	'	'	'	'
Payments to Acquire Property, Plant, and Equipment	'	'	229,000	1,000	'	'	'	'
Proceeds from Sale of Property, Plant, and Equipment	'	'	0	'	'	'	'	'
Insurance proceeds from involuntary conversion of property, plant and equipment	'	'	'	0	'	'	'	'
Proceeds from Contributions from Affiliates, Investing Activities	'	'	0	0	'	'	'	'
Payments of Distributions to Affiliates, Investing Activities	'	'	0	0	'	'	'	'
Net Cash Provided by (Used in) Investing Activities	'	'	229,000	-1,000	'	'	'	'
Proceeds from Partnership Contribution	'	'	0	0	'	'	'	'
Proceeds from Contributions from Affiliates	'	'	0	0	'	'	'	'
Payments of Distributions to Affiliates	'	'	2,565,000	2,292,000	'	'	'	'
Partners' Capital Account, Public Sale of Units Net of Offering Costs	'	'	0	'	'	'	'	'
Distribution Made to Limited Partner, Cash Distributions Paid	'	'	0	0	'	'	'	'
Proceeds from Issuance of Convertible Preferred Units	'	'	'	0	'	'	'	'
Noncontrolling Interest, Decrease from Redemptions or Purchase of Interests	'	'	0	'	'	'	'	'
Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders	'	'	225,000	443,000	'	'	'	'
Partners' Capital Account, Treasury Units, Purchased	'	'	0	0	'	'	'	'
Payments of Debt Issuance Costs	'	'	0	0	'	'	'	'
Repayments of Notes Payable	'	'	0	0	'	'	'	'
Borrowings on other debt	'	'	0	0	'	'	'	'
Repayments of Related Party Debt	'	'	'	0	'	'	'	'
Repayments of Other Debt	'	'	'	0	'	'	'	'
Payments on long-term debt	'	'	0	0	'	'	'	'
Proceeds from Issuance of Long-term Debt	'	'	0	0	'	'	'	'
Net Cash Provided by (Used in) Financing Activities	'	'	-2,790,000	-2,735,000	'	'	'	'
Cash and Cash Equivalents, Period Increase (Decrease)	'	'	0	0	'	'	'	'
Accrued Unitholder Distributions	'	'	0	0	'	'	'	'
Dividends, Paid-in-kind	'	'	0	'	'	'	'	'
Cash and cash equivalents, including discontinued operations	0	'	0	'	'	0	0	0
Interest Paid	'	'	0	0	'	'	'	'
Capital Expenditures Incurred but Not yet Paid	'	'	0	0	'	'	'	'
Noncash or Part Noncash Acquisition, Net Nonmonetary Assets Acquired (Liabilities Assumed)	'	'	'	0	'	'	'	'
Partners' Capital Account, Distributions to Existing Interest	'	'	'	0	'	'	'	'
Consolidation, Eliminations [Member]	'	'	'	'	'	'	'	'
Condensed Financial Statements, Captions [Line Items]	'	'	'	'	'	'	'	'
Net Cash Provided by (Used in) Operating Activities	'	'	0	0	'	'	'	'
Revenue, Net	-2,344,000	-1,508,000	-5,162,000	-3,471,000	'	'	'	'
Cash and Cash Equivalents, at Carrying Value	0	'	0	'	'	0	'	'
Accounts Receivable, Net, Current	0	'	0	'	'	0	'	'
Unbilled revenue	0	'	0	'	'	0	'	'
Derivative Assets, Current	0	'	0	'	'	0	'	'
Other Assets, Current	0	'	0	'	'	-84,000	'	'
Assets Held-for-sale, Current	0	'	0	'	'	0	'	'
Assets, Current	0	'	0	'	'	-84,000	'	'
Derivative Assets, Noncurrent	'	'	'	'	'	0	'	'
Property, Plant and Equipment, Net	0	'	0	'	'	0	'	'
Notes Receivable, Related Parties, Noncurrent	-27,315,000	'	-27,315,000	'	'	-27,315,000	'	'
Goodwill	0	'	0	'	'	0	'	'
Intangible Assets, Net (Excluding Goodwill)	0	'	0	'	'	0	'	'
Other Assets, Noncurrent	0	'	0	'	'	0	'	'
Noncurrent assets held for sale, net	0	'	0	'	'	0	'	'
Investment In Subsidiaries	-303,365,000	'	-303,365,000	'	'	-200,508,000	'	'
Assets	-330,680,000	'	-330,680,000	'	'	-227,907,000	'	'
Accounts Payable, Current	0	'	0	'	'	0	'	'
Gas Purchase Payable, Current	0	'	0	'	'	0	'	'
Accrued Liabilities and Other Liabilities	0	'	0	'	'	-84,000	'	'
Less: current portion	0	'	0	'	'	0	'	'
Risk management liabilities	0	'	0	'	'	0	'	'
Liabilities of Disposal Group, Including Discontinued Operation, Current	0	'	0	'	'	0	'	'
Liabilities, Current	0	'	0	'	'	-84,000	'	'
Risk management liabilities	0	'	0	'	'	0	'	'
Asset Retirement Obligation	0	'	0	'	'	0	'	'
Other Liabilities, Noncurrent	0	'	0	'	'	0	'	'
Long-term Debt, Excluding Current Maturities	-27,315,000	'	-27,315,000	'	'	-27,315,000	'	'
Deferred Tax Liabilities, Net	0	'	0	'	'	0	'	'
Liabilities of Disposal Group, Including Discontinued Operation, Noncurrent	0	'	0	'	'	0	'	'
Liabilities	-27,315,000	'	-27,315,000	'	'	-27,399,000	'	'
Series A convertible preferred units (5,430 thousand and 5,279 thousand units issued and outstanding as of June 30, 2014, and December 31, 2013, respectively)	0	'	0	'	'	0	'	'
Partners' Capital	-303,365,000	'	-303,365,000	'	'	-200,508,000	'	'
Noncontrolling interests	0	'	0	'	'	0	'	'
Total liabilities and partners’ capital	-303,365,000	'	-303,365,000	'	'	-200,508,000	'	'
Liabilities and Equity	-330,680,000	'	-330,680,000	'	'	-227,907,000	'	'
Loss on commodity derivatives, net	0	0	0	0	'	'	'	'
Revenues	-2,344,000	-1,508,000	-5,162,000	-3,471,000	'	'	'	'
Natural Gas Midstream Costs	-2,344,000	-1,508,000	-5,162,000	-3,471,000	'	'	'	'
Direct Operating Costs	0	0	0	0	'	'	'	'
Selling, General and Administrative Expense	0	0	0	0	'	'	'	'
Allocated Share-based Compensation Expense	0	0	0	0	'	'	'	'
Depreciation, Depletion and Amortization	0	0	0	0	'	'	'	'
Total operating expenses	-2,344,000	-1,508,000	-5,162,000	-3,471,000	'	'	'	'
Gain on involuntary conversion of property, plant and equipment	'	'	'	0	'	'	'	'
Loss on sale of assets, net	'	'	0	'	'	'	'	'
Impairment of Long-Lived Assets Held-for-use	'	0	'	0	'	'	'	'
Operating income (loss)	0	0	0	0	'	'	'	'
Earnings from Consolidated Affiliates	1,555,000	20,797,000	913,000	23,274,000	'	'	'	'
Interest Expense	0	0	0	0	'	'	'	'
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest	1,555,000	20,797,000	913,000	23,274,000	'	'	'	'
Income Tax Expense (Benefit), Continuing Operations	0	0	0	0	'	'	'	'
Net loss from continuing operations	1,555,000	20,797,000	913,000	23,274,000	'	'	'	'
Loss from operations of disposal groups, net of tax	0	0	0	0	'	'	'	'
Net loss	1,555,000	20,797,000	913,000	23,274,000	'	'	'	'
Less: Comprehensive income attributable to noncontrolling interests	0	0	0	0	'	'	'	'
Net loss attributable to the Partnership	1,555,000	20,797,000	913,000	23,274,000	'	'	'	'
Unrealized gain (loss) on post retirement benefit plan assets and liabilities	-10,000	43,000	-46,000	56,000	'	'	'	'
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest	1,545,000	20,840,000	867,000	23,330,000	'	'	'	'
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	1,545,000	20,840,000	867,000	23,330,000	'	'	'	'
Acquisition Costs, Period Cost	'	'	0	'	'	'	'	'
Payments to Acquire Property, Plant, and Equipment	'	'	0	0	'	'	'	'
Proceeds from Sale of Property, Plant, and Equipment	'	'	0	'	'	'	'	'
Insurance proceeds from involuntary conversion of property, plant and equipment	'	'	'	0	'	'	'	'
Proceeds from Contributions from Affiliates, Investing Activities	'	'	-13,793,000	-7,805,000	'	'	'	'
Payments of Distributions to Affiliates, Investing Activities	'	'	118,180,000	14,705,000	'	'	'	'
Net Cash Provided by (Used in) Investing Activities	'	'	104,387,000	6,900,000	'	'	'	'
Proceeds from Partnership Contribution	'	'	0	0	'	'	'	'
Proceeds from Contributions from Affiliates	'	'	-118,180,000	-14,705,000	'	'	'	'
Payments of Distributions to Affiliates	'	'	-13,793,000	-7,805,000	'	'	'	'
Partners' Capital Account, Public Sale of Units Net of Offering Costs	'	'	0	'	'	'	'	'
Distribution Made to Limited Partner, Cash Distributions Paid	'	'	0	0	'	'	'	'
Proceeds from Issuance of Convertible Preferred Units	'	'	'	0	'	'	'	'
Noncontrolling Interest, Decrease from Redemptions or Purchase of Interests	'	'	0	'	'	'	'	'
Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders	'	'	0	0	'	'	'	'
Partners' Capital Account, Treasury Units, Purchased	'	'	0	0	'	'	'	'
Payments of Debt Issuance Costs	'	'	0	0	'	'	'	'
Repayments of Notes Payable	'	'	0	0	'	'	'	'
Borrowings on other debt	'	'	0	0	'	'	'	'
Repayments of Related Party Debt	'	'	'	0	'	'	'	'
Repayments of Other Debt	'	'	'	0	'	'	'	'
Payments on long-term debt	'	'	0	0	'	'	'	'
Proceeds from Issuance of Long-term Debt	'	'	0	0	'	'	'	'
Net Cash Provided by (Used in) Financing Activities	'	'	-104,387,000	-6,900,000	'	'	'	'
Cash and Cash Equivalents, Period Increase (Decrease)	'	'	0	0	'	'	'	'
Accrued Unitholder Distributions	'	'	0	0	'	'	'	'
Dividends, Paid-in-kind	'	'	0	'	'	'	'	'
Cash and cash equivalents, including discontinued operations	0	'	0	'	'	0	0	0
Interest Paid	'	'	0	0	'	'	'	'
Capital Expenditures Incurred but Not yet Paid	'	'	0	0	'	'	'	'
Noncash or Part Noncash Acquisition, Net Nonmonetary Assets Acquired (Liabilities Assumed)	'	'	'	0	'	'	'	'
Partners' Capital Account, Distributions to Existing Interest	'	'	'	0	'	'	'	'
ArcLight [Member]	'	'	'	'	'	'	'	'
Condensed Financial Statements, Captions [Line Items]	'	'	'	'	'	'	'	'
Noncash or Part Noncash Acquisition, Net Nonmonetary Assets Acquired (Liabilities Assumed)	'	'	0	59,994,000	'	'	'	'
Blackwater [Member]	'	'	'	'	'	'	'	'
Condensed Financial Statements, Captions [Line Items]	'	'	'	'	'	'	'	'
Noncash or Part Noncash Acquisition, Net Nonmonetary Assets Acquired (Liabilities Assumed)	'	'	0	22,129,000	'	'	'	'
Gathering And Processing [Member]	'	'	'	'	'	'	'	'
Condensed Financial Statements, Captions [Line Items]	'	'	'	'	'	'	'	'
Revenue, Net	50,015,000	52,525,000	101,641,000	100,766,000	'	'	'	'
Loss on commodity derivatives, net	-193,000	914,000	-323,000	609,000	'	'	'	'
Revenues	49,822,000	53,439,000	101,318,000	101,375,000	'	'	'	'
Natural Gas Midstream Costs	39,238,000	43,702,000	80,359,000	83,370,000	'	'	'	'
Direct Operating Costs	5,746,000	3,637,000	9,914,000	7,127,000	'	'	'	'
Series B [Member]	'	'	'	'	'	'	'	'
Condensed Financial Statements, Captions [Line Items]	'	'	'	'	'	'	'	'
Partners' Capital Account, Public Sale of Units Net of Offering Costs	'	'	-30,000,000	0	'	'	'	'
Partners' Capital Account, Distributions	560,000	0	1,052,000	0	'	'	'	'
Series B [Member] | Parent Company [Member]	'	'	'	'	'	'	'	'
Condensed Financial Statements, Captions [Line Items]	'	'	'	'	'	'	'	'
Partners' Capital Account, Public Sale of Units Net of Offering Costs	'	'	-30,000,000	'	'	'	'	'
Series B [Member] | Guarantor Subsidiaries [Member]	'	'	'	'	'	'	'	'
Condensed Financial Statements, Captions [Line Items]	'	'	'	'	'	'	'	'
Partners' Capital Account, Public Sale of Units Net of Offering Costs	'	'	0	'	'	'	'	'
Series B [Member] | Non-Guarantor Subsidiaries [Member]	'	'	'	'	'	'	'	'
Condensed Financial Statements, Captions [Line Items]	'	'	'	'	'	'	'	'
Partners' Capital Account, Public Sale of Units Net of Offering Costs	'	'	0	'	'	'	'	'
Series B [Member] | Consolidation, Eliminations [Member]	'	'	'	'	'	'	'	'
Condensed Financial Statements, Captions [Line Items]	'	'	'	'	'	'	'	'
Partners' Capital Account, Public Sale of Units Net of Offering Costs	'	'	0	'	'	'	'	'
ArcLight [Member] | Parent Company [Member]	'	'	'	'	'	'	'	'
Condensed Financial Statements, Captions [Line Items]	'	'	'	'	'	'	'	'
Noncash or Part Noncash Acquisition, Net Nonmonetary Assets Acquired (Liabilities Assumed)	'	'	'	59,994,000	'	'	'	'
Blackwater [Member] | Parent Company [Member]	'	'	'	'	'	'	'	'
Condensed Financial Statements, Captions [Line Items]	'	'	'	'	'	'	'	'
Noncash or Part Noncash Acquisition, Net Nonmonetary Assets Acquired (Liabilities Assumed)	'	'	'	22,129,000	'	'	'	'
Accumulated Other Comprehensive Income (Loss) [Member]	'	'	'	'	'	'	'	'
Condensed Financial Statements, Captions [Line Items]	'	'	'	'	'	'	'	'
Partners' Capital	150,000	295,000	150,000	295,000	'	104,000	'	351,000
Net loss	'	'	0	0	'	'	'	'
Other comprehensive income (loss)	'	'	'	-56,000	'	'	'	'
Partners' Capital Account, Public Sale of Units Net of Offering Costs	'	'	0	'	'	'	'	'
Partners' Capital Account, Distributions	'	'	0	0	'	'	'	'
Noncontrolling Interest, Decrease from Redemptions or Purchase of Interests	'	'	0	'	'	'	'	'
Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders	'	'	0	0	'	'	'	'
Tax Netting Repurchase	'	'	0	0	'	'	'	'
Partners' Capital Account, Distributions to Existing Interest	'	'	'	0	'	'	'	'
Noncontrolling Interest [Member]	'	'	'	'	'	'	'	'
Condensed Financial Statements, Captions [Line Items]	'	'	'	'	'	'	'	'
Partners' Capital	4,547,000	7,338,000	4,547,000	7,338,000	'	4,628,000	'	7,438,000
Other comprehensive income (loss)	'	'	0	0	'	'	'	'
Partners' Capital Account, Public Sale of Units Net of Offering Costs	'	'	0	'	'	'	'	'
Noncontrolling Interest, Decrease from Redemptions or Purchase of Interests	'	'	-29,000	'	'	'	'	'
Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders	'	'	226,000	443,000	'	'	'	'
Tax Netting Repurchase	'	'	0	0	'	'	'	'
Partners' Capital Account, Distributions to Existing Interest	'	'	'	$0	'	'	'	'

Subsequent_Events_Details

Subsequent Events (Details) (USD $)	3 Months Ended		6 Months Ended				1 Months Ended			12 Months Ended
In Millions, except Share data, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Jan. 29, 2014	Dec. 31, 2013	Aug. 11, 2014	Jul. 24, 2014	Aug. 14, 2014	Jul. 25, 2014	Jul. 14, 2014
							Subsequent Event [Member]	Subsequent Event [Member]	Subsequent Event [Member]	Subsequent Event [Member]	Subsequent Event [Member]
Business Acquisition [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Payments to Acquire Equity Method Investments	'	'	'	'	'	'	$13.50	'	$115.40	'	'
Limited Partners' Capital Account, Units Issued	11,139,729	'	11,139,729	'	3,400,000	7,414,000	'	'	'	'	7,613,247
Sale of Stock, Price Per Share	$26.75	'	$26.75	'	'	'	'	'	'	'	$26.27
Distribution Made to Limited Partner, Distributions Declared, Per Unit	$0.46	$0.43	$0.92	$0.87	'	'	'	$0.46	'	$1.85	'
Partners' Capital Account, Public Sale of Units	'	'	'	'	'	'	200	'	'	'	'
Total distribution with respects to incremental common units	'	'	'	'	'	'	$3.50	'	'	'	'
Fair value, paid in kind distributions	$3,900,000	'	'	'	'	'	'	'	'	'	'

Asset_Retirement_Obligations_D

Asset Retirement Obligations (Details) (USD $)	6 Months Ended
	Jun. 30, 2014	Dec. 31, 2013
Asset Retirement Obligation Disclosure [Abstract]	'	'
Restricted Cash and Cash Equivalents	$3,000,000	'
Asset Retirement Obligation	34,648,000	34,636,000
Asset Retirement Obligation, Liabilities Incurred	248,000	'
Asset Retirement Obligation, Liabilities Settled	-623,000	'
Asset Retirement Obligation, Accretion Expense	$387,000	'