Southcross Energy Partners 10-Q 7 Nov 14 2014 Q3 Quarterly report Financial data

Document_and_Entity_Informatio

Document and Entity Information	9 Months Ended
	Sep. 30, 2014	Nov. 05, 2014	Sep. 30, 2014	Dec. 31, 2013
			Limited Partner, units authorized	Limited Partner, units authorized
Entity Registrant Name	'Southcross Energy Partners, L.P.	'	'	'
Entity Central Index Key	'0001547638	'	'	'
Document Type	'10-Q	'	'	'
Document Period End Date	30-Sep-14	'	'	'
Amendment Flag	'false	'	'	'
Current Fiscal Year End Date	'--12-31	'	'	'
Entity Current Reporting Status	'Yes	'	'	'
Entity Filer Category	'Accelerated Filer	'	'	'
Entity Common Stock, Shares Outstanding	'	23,800,943	'	'
Document Fiscal Year Focus	'2014	'	'	'
Document Fiscal Period Focus	'Q3	'	'	'
Common Stock, Shares, Outstanding	'	'	21,684,543	10,390,272

CONDENSED_CONSOLIDATED_BALANCE

CONDENSED CONSOLIDATED BALANCE SHEETS (USD $)	Sep. 30, 2014	Dec. 31, 2013
Current assets:	'	'
Cash and cash equivalents	$1,823,000	$3,349,000
Trade accounts receivable	68,583,000	57,669,000
Accounts Receivable, Related Parties	6,950,000	0
Prepaid expenses	3,589,000	3,061,000
Other current assets	5,732,000	5,105,000
Total current assets	86,677,000	69,184,000
Property, plant and equipment, net	947,928,000	575,795,000
Intangible assets, net	1,525,000	1,568,000
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures	148,848,000	0
Other assets	19,951,000	5,768,000
Total assets	1,204,929,000	652,315,000
Current liabilities:	'	'
Accounts payable and accrued liabilities	96,679,000	62,451,000
Due to Affiliate, Current	4,977,000	0
Other current liabilities	15,230,000	5,344,000
Total current liabilities	116,886,000	67,795,000
Long-term debt	457,875,000	267,300,000
Other non-current liabilities	990,000	1,692,000
Total liabilities	575,751,000	336,787,000
Partners' capital:	'	'
Accumulated other comprehensive loss	0	-210,000
Total partners' capital	629,178,000	275,024,000
Liabilities, preferred units, and partners' capital:	'	'
Total liabilities, preferred units and partners' capital	1,204,929,000	652,315,000
Limited Partner, units authorized	'	'
Partners' capital:	'	'
Total partners' capital	271,293,000	169,141,000
Class B Convertible Units [Member]	'	'
Partners' capital:	'	'
Total partners' capital	294,894,000	0
Subordinated Units [Member]	'	'
Partners' capital:	'	'
Total partners' capital	50,194,000	99,726,000
General Partner interest [Member]	'	'
Partners' capital:	'	'
General Partner interest	12,797,000	6,367,000
Total partners' capital	12,797,000	6,367,000
Preferred units issued	'	'
Preferred units of Southcross Energy LLC:	'	'
Series A convertible preferred units (1,832,399 and 1,769,915 units issued and outstanding as of June 30, 2014 and December 31, 2013, respectively)	$0	$40,504,000

CONDENSED_CONSOLIDATED_BALANCE1

CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical)	Sep. 30, 2014	Dec. 31, 2013
Limited Partner, units authorized	'	'
Partners' capital:	'	'
Limited Partner, units authorized	25,179,351	13,963,713
Limited Partner, units outstanding	21,454,119	12,253,985
Subordinated Units [Member]	'	'
Partners' capital:	'	'
Limited Partner, units authorized	12,213,713	'
Limited Partner, units issued	'	12,213,713
Limited Partner, units outstanding	12,213,713	12,213,713

CONDENSED_CONSOLIDATED_STATEME

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Revenues	$205,203,000	$160,629,000	$613,857,000	$459,583,000
Total revenues	211,493,000	160,629,000	620,147,000	459,583,000
Revenue from Related Parties	6,290,000	0	6,290,000	0
Expenses:	'	'	'	'
Cost of natural gas and liquids sold	180,562,000	135,416,000	535,791,000	394,212,000
Operations and maintenance	16,889,000	10,896,000	39,494,000	31,069,000
Depreciation and amortization	11,629,000	9,447,000	29,135,000	24,958,000
General and administrative	14,926,000	5,227,000	27,722,000	16,850,000
Asset Impairment Charges	1,556,000	0	1,556,000	0
Loss on sale of assets, net of gains	334,000	0	292,000	0
Total expenses	225,896,000	160,986,000	633,990,000	467,089,000
Loss from operations	-14,403,000	-357,000	-13,843,000	-7,506,000
Income (Loss) from Equity Method Investments	-3,308,000	'	-3,308,000	'
Gains (Losses) on Extinguishment of Debt	-2,316,000	'	-2,316,000	'
Interest expense	-4,596,000	-3,587,000	-9,340,000	-8,735,000
Other Expenses	-86,000	0	-86,000	0
Other Cost and Expense, Operating	10,306,000	3,587,000	15,050,000	8,735,000
Loss before income tax expense	-24,709,000	-3,944,000	-28,893,000	-16,241,000
Interest expense	-69,000	-125,000	-133,000	-404,000
Net loss	-24,778,000	-4,069,000	-29,026,000	-16,645,000
Distribution Made to Member or Limited Partner, Distribution Paid In-kind, Fair Value Disclosure	'	'	'	0
General partner Unit in-kind distribution	-112,000	'	'	'
Net loss attributable to partners	-24,466,000	-98,000	-34,279,000	-17,900,000
Earnings per unit and distributions declared	'	'	'	'
Earnings Per Share, Diluted	($0.49)	($0.14)	($0.91)	($0.72)
Distribution Made to Member or Limited Partner Minimum Quarterly Distributions Declared Per Unit	$0.40	'	$0.40	'
General Partner [Member]	'	'	'	'
Expenses:	'	'	'	'
Net loss	-523,000	-81,000	-622,000	'
Net Income (Loss) Allocated to General Partners	'	'	-581,000	-334,000
Distribution Made to Member or Limited Partner, Distribution Paid In-kind, Fair Value Disclosure	-112,000	0	-123,000	'
Earnings per unit and distributions declared	'	'	'	'
Net loss allocated to limited partner, basic and diluted	'	'	'	-309,000
Class B Convertible Units [Member]	'	'	'	'
Expenses:	'	'	'	'
Net loss	-6,778,000	'	-6,778,000	'
Net Income (Loss) Allocated to General Partners	'	'	'	'
Earnings per unit and distributions declared	'	'	'	'
Net loss allocated to limited partner, basic and diluted	'	'	-6,778,000	'
Limited Partners	'	'	'	'
Expenses:	'	'	'	'
Net loss	-17,165,000	-17,000	-26,879,000	-17,566,000
Net loss attributable to partners	'	'	-34,279,000	'
Common Limited Partners [Member]	'	'	'	'
Expenses:	'	'	'	'
Net loss	'	'	'	-8,172,000
Earnings per unit and distributions declared	'	'	'	'
Net loss allocated to limited partner, basic and diluted	-11,156,000	'	-19,084,000	-8,784,000
Weighted average number of limited partner units outstanding, basic and diluted	22,925,979	12,222,692	20,911,472	12,219,699
Basic and diluted loss per unit (in dollars per unit)	($0.49)	$0.19	($0.91)	($0.72)
Subordinated Limited Partners [Member]	'	'	'	'
Earnings per unit and distributions declared	'	'	'	'
Net loss allocated to limited partner, basic and diluted	-6,009,000	-2,340,000	-7,795,000	-8,782,000
Weighted average number of limited partner units outstanding, basic and diluted	12,213,713	12,213,713	12,213,713	12,213,713
Basic and diluted loss per unit (in dollars per unit)	($0.49)	($0.19)	($0.64)	($0.72)
Preferred units issued	'	'	'	'
Expenses:	'	'	'	'
Dividends, Preferred Stock, Paid-in-kind	0	696,000	534,000	1,255,000
Earnings per unit and distributions declared	'	'	'	'
Distribution Made to Member or Limited Partner Minimum Quarterly Distributions Declared Per Unit	'	'	$0.40	'
Cash Distribution [Member]	'	'	'	'
Earnings per unit and distributions declared	'	'	'	'
Distribution Made to Member or Limited Partner Minimum Quarterly Distributions Declared Per Unit	$0.40	$0.40	'	'
Distribution Made to Member or Limited Partner, Distribution Paid in Cash	9,933,000	9,987,000	'	'
Cash Distribution [Member] | General Partner [Member]	'	'	'	'
Earnings per unit and distributions declared	'	'	'	'
Distribution Made to Member or Limited Partner, Distribution Paid in Cash	413,000	214,000	'	'
Cash Distribution [Member] | Subordinated Limited Partners [Member] | Limited Partners	'	'	'	'
Earnings per unit and distributions declared	'	'	'	'
Distribution Made to Member or Limited Partner, Distribution Paid in Cash	0	4,885,000	'	'
Cash Distribution [Member] | Common Limited Partners [Member] | Limited Partners	'	'	'	'
Earnings per unit and distributions declared	'	'	'	'
Distribution Made to Member or Limited Partner Minimum Quarterly Distributions Declared Per Unit	$0.40	$0.40	$1.20	$1.20
Distribution Made to Member or Limited Partner, Distribution Paid in Cash	$9,520,000	$4,888,000	'	'

CONDENSED_CONSOLIDATED_STATEME1

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Statement of Comprehensive Income [Abstract]	'	'	'	'
Net loss	($24,778)	($4,069)	($29,026)	($16,645)
Other comprehensive income (loss):	'	'	'	'
Hedging losses reclassified to earnings and recognized in interest expense	0	108	221	302
Adjustment in fair value of derivatives	0	-82	-11	-112
Total other comprehensive income	0	26	210	190
Comprehensive loss	($24,778)	($4,043)	($28,816)	($16,455)

CONDENSED_CONSOLIDATED_STATEME2

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $)	9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013
Cash flows from operating activities:	'	'
Net loss	($29,026)	($16,645)
Adjustments to reconcile net loss to net cash provided by operating activities:	'	'
Depreciation and amortization	29,135	24,958
Unit-based compensation	10,837	1,645
Amortization and write-off of deferred financing costs	3,596	947
Loss on sale of assets, net of gains	292	0
Unrealized loss on financial instruments	539	0
Income (Loss) from Equity Method Investments, Net of Dividends or Distributions	3,308	0
Asset Impairment Charges	1,556	0
Other, net	81	-63
Changes in operating assets and liabilities:	'	'
Trade accounts receivable, including affiliates	-12,009	-1,191
Prepaid expenses and other current assets	-1,066	-335
Other non-current assets	-32	-60
Accounts payable and accrued liabilities	10,043	-7,502
Other liabilities	4,046	1,708
Net cash provided by operating activities	21,300	3,462
Cash flows from investing activities:	'	'
Capital expenditures	-85,892	-86,149
Expenditures for assets subject to property damage claims, net of insurance proceeds and deductibles	-796	-2,716
Proceeds from sales of assets	1,758	45
Payments to Acquire Interest in Joint Venture	-105	0
Payments to Acquire Businesses and Interest in Affiliates	-79,955	0
Proceeds from sales of assets	-38,636	0
Net cash used in investing activities	-203,626	-88,820
Net cash used in investing activities	'	'
Cash flows from financing activities:	144,671	0
Proceeds from Issuance of Long-term Debt	184,000	107,500
Proceeds from Issuance of Other Long-term Debt	450,000	0
Repayments of Long-term Lines of Credit	-442,300	-40,000
Repayments of Other Long-term Debt	-1,125	0
Repayments under our credit facility	-454	-398
Payments on capital lease obligations	-17,716	-2,139
Proceeds from Issuance of Preferred Stock and Preference Stock	0	38,832
Proceeds from Partnership Contribution	9,967	800
Payments of Capital Distribution	-42,711	-25,941
Proceeds from (Repayments of) Related Party Debt	-100,000	0
Payments Related to Tax Withholding for Share-based Compensation	-3,532	0
Net Cash Provided by (Used in) Financing Activities, Continuing Operations	180,800	78,654
Net decrease in cash and cash equivalents	-1,526	-6,704
Cash and cash equivalents b Beginning of period	3,349	7,490
Cash and cash equivalents b End of period	$1,823	$786

CONDENSED_CONSOLIDATED_STATEME3

CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN PARTNERS' CAPITAL (USD $)

Total

Accumulated Other Comprehensive Loss [Member]

Limited Partners

Common

Common

Common

Class B Convertible Units [Member]

Subordinated

Subordinated

Subordinated

Subordinated

General Partner [Member]

General Partner [Member]

Common Units [Member]

Series A Convertible Preferred Units [Member]

Series A Convertible Preferred Units [Member]

Class B Convertible Units [Member]

Series A Preferred Stock [Member]

Subordinated Units [Member]

Series A Preferred Stock [Member]

Subordinated Units [Member]

Series A Preferred Stock [Member]

Common

General Partner [Member]

BALANCE - December 31, 2013 at Dec. 31, 2012

$326,467,000

($477,000)

'

$194,365,000

'

'

'

$125,951,000

'

'

'

$6,628,000

'

'

'

'

Increase (Decrease) in Shareholders' Equity

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Net loss

-16,645,000

0

-17,566,000

-8,172,000

'

'

'

'

'

'

'

'

'

'

'

'

Net loss allocated to limited partner, basic and diluted

'

'

'

-8,784,000

'

'

'

-8,782,000

-8,164,000

'

'

-309,000

'

'

'

'

Unit-based compensation on long-term incentive plan

1,206,000

0

'

1,206,000

'

'

'

'

'

0

'

0

'

'

'

'

Series A convertible preferred unit in-kind distribution and fair value adjustment

0

0

'

'

'

-615,000

'

'

'

-615,000

'

'

-25,000

'

'

'

Dividends, Preferred Stock, Paid-in-kind

'

'

'

'

'

'

'

'

'

'

'

'

'

'

1,255,000

'

Unit-based compensation on long-term incentive plan

800,000

0

'

0

'

'

'

0

'

'

'

800,000

'

'

'

'

Cash distributions paid

-25,941,000

0

'

-12,709,000

'

'

'

-12,703,000

'

'

'

-529,000

'

'

'

'

Accrued distribution on long-term incentive plan

-191,000

0

'

-191,000

'

'

'

0

'

'

'

0

'

'

'

'

Cash distributions and distribution equivalent rights paid

0

0

'

-13,000

'

'

'

-12,000

'

'

'

25,000

'

'

'

'

Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax

190,000

190,000

'

0

'

'

'

0

'

'

'

0

'

'

'

'

BALANCE - September 30, 2014 at Sep. 30, 2013

284,631,000

-287,000

'

173,871,000

'

'

'

104,457,000

'

'

'

6,590,000

'

'

'

'

BALANCE - December 31, 2013 at Jun. 30, 2013

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Increase (Decrease) in Shareholders' Equity

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Net loss

-4,069,000

'

-17,000

'

'

'

'

'

'

'

'

-81,000

'

'

'

'

Net loss allocated to limited partner, basic and diluted

'

'

'

'

'

'

'

-2,340,000

'

'

'

'

'

'

'

'

Series A convertible preferred unit in-kind distribution and fair value adjustment

4,667,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Dividends, Preferred Stock, Paid-in-kind

'

'

'

'

'

'

'

'

'

'

'

'

'

'

696,000

'

Unit-based compensation on long-term incentive plan

'

'

'

'

'

'

'

'

'

'

'

800,000

'

'

'

'

BALANCE - September 30, 2014 at Sep. 30, 2013

284,631,000

'

'

'

'

'

'

104,457,000

'

'

'

6,590,000

'

'

'

'

BALANCE - December 31, 2013 at Dec. 31, 2013

275,024,000

-210,000

'

169,141,000

'

'

0

99,726,000

'

'

'

6,367,000

'

'

'

'

Increase (Decrease) in Shareholders' Equity

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Net loss

-29,026,000

0

-26,879,000

'

'

'

-6,778,000

'

'

'

'

-622,000

'

'

'

'

Net loss allocated to limited partner, basic and diluted

'

'

'

-19,084,000

'

'

-6,778,000

-7,795,000

'

'

-7,565,000

'

'

-14,102,000

'

'

Issuance of common units, net

144,671,000

0

'

144,671,000

'

'

0

0

'

'

'

0

'

'

'

'

Proceeds from Issuance of Convertible Preferred Stock

324,413,000

0

'

'

0

'

324,413,000

0

'

'

'

0

'

'

'

'

Business Combination, Consideration Transferred

-99,625,000

0

'

-45,880,000

'

'

-28,208,000

-23,544,000

'

'

'

-1,993,000

'

'

'

'

Unit-based compensation on long-term incentive plan

9,236,000

0

'

9,236,000

'

'

0

'

'

0

'

0

'

'

'

'

Conversion of Stock, Amount Converted

45,624,000

0

'

45,624,000

'

'

0

0

'

'

'

0

'

'

'

'

Series A convertible preferred unit in-kind distribution and fair value adjustment

0

0

'

'

-3,533,000

'

5,467,000

'

'

-1,824,000

'

'

-110,000

'

-4,596,000

'

Dividends, Preferred Stock, Paid-in-kind

'

'

'

'

'

'

'

'

'

'

'

'

'

'

534,000

'

Unit-based compensation on long-term incentive plan

9,967,000

0

'

0

'

'

0

0

'

'

'

9,967,000

'

'

'

800,000

Partners' Capital Account, Distributions

-42,092,000

0

'

-26,566,000

'

'

0

-14,657,000

'

'

'

-869,000

'

'

'

'

Cash distributions paid

-5,130,000

0

'

-3,126,000

'

'

0

-1,897,000

'

'

'

-107,000

'

'

'

'

Accrued distribution on long-term incentive plan

-562,000

0

'

-562,000

'

'

0

0

'

'

'

0

'

'

'

'

Contributions from general partner

-3,532,000

0

'

-3,532,000

'

'

0

0

'

'

'

0

'

'

'

'

Cash distributions and distribution equivalent rights paid

0

0

'

-78,000

'

'

0

-45,000

'

'

'

123,000

'

'

'

'

Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax

210,000

210,000

'

0

'

'

0

0

'

'

'

0

'

'

'

'

BALANCE - September 30, 2014 at Sep. 30, 2014

629,178,000

0

'

271,293,000

'

'

294,894,000

50,194,000

'

'

'

12,797,000

'

'

'

'

BALANCE - December 31, 2013 at Jun. 30, 2014

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Increase (Decrease) in Shareholders' Equity

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Net loss

-24,778,000

'

-17,165,000

'

'

'

-6,778,000

'

'

'

'

-523,000

'

'

'

'

Net loss allocated to limited partner, basic and diluted

'

'

'

-11,156,000

'

'

'

-6,009,000

'

'

'

'

'

'

'

'

Series A convertible preferred unit in-kind distribution and fair value adjustment

'

'

'

'

'

'

'

'

'

'

'

'

'

'

424,000

'

Dividends, Preferred Stock, Paid-in-kind

'

'

'

'

'

'

'

'

'

'

'

'

'

'

0

'

BALANCE - September 30, 2014 at Sep. 30, 2014

$629,178,000

'

'

$271,293,000

'

'

$294,894,000

$50,194,000

'

'

'

$12,797,000

'

'

'

'

ORGANIZATION_AND_DESCRIPTION_O

ORGANIZATION AND DESCRIPTION OF BUSINESS	9 Months Ended
	Sep. 30, 2014
Organization, Consolidation and Presentation of Financial Statements [Abstract]	'
ORGANIZATION AND DESCRIPTION OF BUSINESS	'
	ORGANIZATION AND DESCRIPTION OF BUSINESS
	Organization
	Southcross Energy Partners, L.P. (the "Partnership," "Southcross," "we," "our" or "us") is a Delaware limited partnership formed in April 2012. Our common units are listed on the New York Stock Exchange under the symbol “SXE.”
	Until August 4, 2014, Southcross Energy LLC, a Delaware limited liability company, held all of the equity interests in Southcross Energy Partners GP, LLC, a Delaware limited liability company, and our general partner (“General Partner”), all of our subordinated units, as well as a portion of our common units and Series A Convertible Preferred Units (“Series A Preferred Units”). Southcross Energy LLC is controlled through investment funds and entities associated with Charlesbank Capital Partners, LLC (“Charlesbank”).
	Holdings Transaction
	On August 4, 2014, Southcross Energy LLC and TexStar Midstream Services, LP (“TexStar”) combined pursuant to a contribution agreement in which Southcross Holdings LP, a Delaware limited partnership (“Holdings”), was formed (the “Holdings Transaction”). As a result of the Holdings Transaction, Holdings owns 100% of our General Partner (and therefore controls us), all of our subordinated units, a portion of our common units, as well as 100% of the equity of TexStar. Charlesbank, EIG Global Energy Partners (“EIG”) and Tailwater Capital LLC (“Tailwater”) (collectively, the “Sponsors”) each indirectly own approximately one-third of Holdings.
	TexStar Rich Gas System Transaction
	Contemporaneously with the closing of the Holdings Transaction, TexStar contributed to us its gathering and processing assets (the “TexStar Rich Gas System”), which was owned by TexStar (the “TexStar Rich Gas System Transaction”). For additional details regarding the Holdings Transaction and the TexStar Rich Gas System Transaction, see Notes 2, 3, 7, 10, 11 and 14.
	Description of Business
	We are a master limited partnership that provides natural gas gathering, processing, treating, compression and transportation services and NGL fractionation and transportation services. We also source, purchase, transport and sell natural gas and NGLs. Our assets are located in South Texas, Mississippi and Alabama and include four gas processing plants, two fractionation facilities and our pipelines. We are headquartered in Dallas, Texas.
	Segments
	Our chief operating decision maker is our General Partner’s Chief Executive Officer who reviews financial information presented on a consolidated basis in order to assess our performance and make decisions about resource allocations. There are no segment managers who are held accountable by the chief operating decision maker, or anyone else, for operations, operating results and planning for levels or components below the consolidated unit level. Accordingly, we have determined that we have one reportable segment.

BASIS_OF_PRESENTATION_AND_SUMM

BASIS OF PRESENTATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES	9 Months Ended
	Sep. 30, 2014
Accounting Policies [Abstract]	'
BASIS OF PRESENTATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES	'
	Basis of Presentation
	We prepared this report under the rules and regulations of the Securities and Exchange Commission and in accordance with accounting principles generally accepted in the United States of America (“GAAP”) for interim financial statements. Accordingly, these condensed consolidated financial statements do not include all of the disclosures required by GAAP and should be read with our 2013 Annual Report on Form 10-K. The condensed consolidated financial statements as of September 30, 2014 and December 31, 2013, and for the three and nine months ended September 30, 2014 and 2013, are unaudited and have been prepared on the same basis as the audited financial statements included in our 2013 Annual Report on Form 10-K. Adjustments (consisting of normal recurring adjustments) necessary for a fair presentation of the results of operations and financial position have been included herein. All intercompany accounts and transactions have been eliminated in the preparation of the accompanying condensed consolidated financial statements.
	The condensed consolidated financial statements reflect the assets acquired and liabilities assumed and the related operating results beginning on March 6, 2014 associated with the Onyx pipelines acquisition discussed further in Note 2. The condensed consolidated financial statements also reflect the TexStar Rich Gas System Transaction and the related operating results beginning on August 4, 2014.
	As a result of the Holdings Transaction, Holdings acquired a controlling equity interest in the Partnership which is being accounted for under the acquisition method of accounting in the consolidated financial statements of Holdings, whereby Holdings recorded the Partnership’s assets acquired and liabilities assumed at fair value. However, because less than 80% of the equity interests in the Partnership were acquired, push down accounting of Holdings’ basis in the Partnership was prohibited in our consolidated financial statements.
	Additionally, because the TexStar Rich Gas System was owned by TexStar, the Partnership recorded the TexStar Rich Gas System at TexStar’s historical cost. Thus, the difference between consideration paid and the TexStar Rich Gas System’s historical cost (net book value) at August 4, 2014 was recorded as a reduction to partners’ capital. Management concluded that the Partnership was the predecessor for accounting purposes for periods prior to August 4, 2014, the date on which the Holdings Transaction and the TexStar Rich Gas System Transaction closed.
	The accompanying unaudited condensed consolidated financial statements were prepared in conformity with GAAP, which requires management to make various estimates and assumptions that may affect the amounts of assets and liabilities, disclosures of contingent assets and liabilities at the date of the condensed consolidated financial statements and the reported amounts of revenues and expenses during the period. Actual results may differ from those estimates. Information for interim periods may not be indicative of our operating results for the entire year.
	The disclosures included in this report provide an update to our 2013 Annual Report on Form 10-K.
	We evaluate events that occur after the balance sheet date, but before the financial statements are issued, for potential recognition or disclosure. Based on the evaluation, we determined that there were no material subsequent events for recognition or disclosure other than those disclosed in this report.
	Significant Accounting Policies
	During the third quarter of 2014, there was an update to our significant accounting policies as described in our 2013 Annual Report on Form 10-K.
	As a result of the TexStar Rich Gas System Transaction, we now hold equity interests in three joint venture entities. We own a 50% or less interest in each of the three entities. The joint venture arrangements give equal management rights with no single investor having unilateral control. Each party sharing joint control must consent to the ventures’ operating, investing and financing decisions. Therefore, because we do not have controlling financial interests, but we do have significant influence, we use the equity method of accounting for investments in joint ventures. We recognize our share of the earnings and losses in the joint ventures pursuant to terms of the applicable limited liability agreements governing such joint ventures, which provide for earnings and losses generally to be allocated based upon each member’s respective ownership interest in the joint ventures. We record our proportionate share of the joint ventures’ net income/loss as equity in income/losses of joint venture investments in the statements of operations. We evaluate investments in joint ventures for impairment when factors indicate that a decrease in the value of the investment has occurred that is not temporary. See Note 14.
	Recent Accounting Pronouncements
	Accounting standard-setting organizations frequently issue new or revised accounting rules. We review new pronouncements to determine their impact, if any, on our consolidated financial statements. We are evaluating the impact of each pronouncement on our consolidated financial statements.
	The Financial Accounting Standard Board (“FASB”) and the International Accounting Standard Board (“IASB”) jointly issued a comprehensive new revenue recognition standard that will supersede substantially all existing revenue recognition guidance under GAAP and International Financial Reporting Standards (“IFRS”). The standard’s core principle is that a company will recognize revenue when it transfers promised goods or services to customers in an amount that reflects the consideration to which the company expects to be entitled in exchange for those goods or services. We are required to adopt this standard beginning in the first quarter of 2017.
	The FASB and the IASB jointly issued a new discontinued operations standard that will update existing discontinued operations guidance under GAAP and IFRS. The standard’s main updates to previous guidance are that it will raise the threshold for disposals to qualify as discontinued operations, continuing cash flows and continuing involvement with disposed components will no longer be considered in determining whether a transaction qualifies as a discontinued operation and additional disclosures surrounding disposals of both discontinued operations and certain other disposals that do not meet the new definition will be required. We are required to adopt this standard beginning in the first quarter of 2015.
	The FASB issued a new going concern standard that will update existing going concern guidance under GAAP. The standard’s new guidance relates to defining management’s responsibility to evaluate whether there is substantial doubt about an organization’s ability to continue as a going concern. Related disclosure in the notes to the consolidated financial statements will be required surrounding whether it is probable that the entity will not be able to meet its obligations as they become due within one year after the date that financial statements are issued. We are required to adopt this standard beginning in the first quarter of 2017.

ACQUISITION

ACQUISITION	9 Months Ended
	Sep. 30, 2014
Business Combinations [Abstract]	'
Acquisition	'
	ACQUISITIONS
	TexStar Rich Gas System Transaction. On August 4, 2014, we acquired the TexStar Rich Gas System through a contribution of TexStar’s equity interest in the entities that own the TexStar Rich Gas System (the “Contribution”) to us. In exchange for the Contribution, we paid $80 million in cash, assumed $100 million of debt (which was immediately repaid through our new term loan agreement) and issued 14,633,000 of our Class B Convertible Units (the “Class B Convertible Units”). The TexStar Rich Gas System consists of a cryogenic processing plant, located in Bee County, Texas, and joint venture ownership in natural gas gathering and residue pipelines across the core producing areas extending from Dimmit to Karnes Counties, Texas in the liquids-rich window of the Eagle Ford shale. These pipelines are operated under split-capacity arrangements within joint ventures with Atlas Pipeline Partners, L.P. The initial accounting for the transaction is not complete because the information necessary for determining certain working capital balances is still in process.
	The amount of the consideration paid over TexStar’s net book value of the assets received and liabilities assumed of the TexStar Rich Gas System is recorded as a reduction to partners’ capital as summarized as follows (in thousands):
	Consideration Paid (1)				$	404,414
	Current assets				$	295
	Property, plant and equipment				255,220
	Investments in joint ventures(2)				152,050
	Total assets contributed				407,565
	Total liabilities assumed (3)				(102,776		)
	Net identifiable assets contributed				$	304,789
	Consideration paid in excess of net assets contributed				$	99,625
	Allocation of reduction to partners' capital
	Common limited partner interest	$	45,880
	Class B Convertible limited partner interest	28,208
	Subordinated limited partner interest	23,544
	General Partner interest	1,993
	Total reduction to partners' capital				$	99,625
	(1) This amount was calculated as follows: $80 million of cash plus 14,633,000 Class B Convertible Units at an issue price of $22.17, the closing price of the Partnership’s common units on August 4, 2014.
	(2) Significant assets acquired through the TexStar Rich Gas System Transaction include equity interests in three joint ventures. See Note 14.
	(3) This amount includes $100 million of debt assumed.
	Onyx Pipelines Acquisition. On March 6, 2014, our subsidiary, Southcross Nueces Pipelines LLC, acquired natural gas pipelines near Corpus Christi, Texas and contracts related to these pipelines from Onyx Midstream, LP and Onyx Pipeline Company (collectively, “Onyx”) for $38.6 million in cash, net of certain adjustments as provided in the purchase agreement.
	The pipelines transport natural gas to two power plants in Nueces County, Texas under fixed-fee contracts that extend through 2029 and include an option to extend the agreements by an additional term of up to ten years. The contracts were renegotiated in connection with the acquisition; therefore, we consider these contracts to be assumed at fair market value.
	The fair values of the property, plant and equipment are based upon assumptions related to expected future cash flows, discount rates and asset lives using currently available information. We utilized a mix of the cost, income and market approaches to determine the estimated fair values of such assets. The fair value measurements and models have been classified as non-recurring Level 3 measurements.
	We performed our assessment of the fair value of the assets acquired and liabilities assumed, and the consideration given was considered equal to the fair value of net assets acquired. As a result, no goodwill was recorded. The assessment was finalized during the second quarter of 2014 and there were no changes to the preliminary balances previously recorded.
	The fair value of the assets acquired and liabilities assumed related to the Onyx purchase price was as follows (in thousands):
	Purchase Price—Cash	$	38,636
	Current assets	$	730
	Property, plant and equipment	39,413
	Total assets acquired	40,143
	Current liabilities assumed	(1,407		)
	Other liabilities assumed	(100		)
	Net identifiable assets acquired	$	38,636
	Pro Forma Financial Information for Onyx Pipelines Acquisition. The following unaudited pro forma financial information for the three and nine months ended September 30, 2013 and the nine months ended September 30, 2014 assumes that the acquisition of pipelines from Onyx occurred on January 1, 2013 and includes adjustments for income from operations, including depreciation and amortization, as well as the effects of financing the transaction (in thousands, except unit information):
		Three Months Ended				Nine Months Ended September 30,
		30-Sep-13				2014			2013
	Total revenue	$	161,777			$	620,796		$	462,818
	Net loss	(4,547		)		(29,104		)	(18,533		)
	Net income (loss) attributable to common unitholders	2,067				(19,132		)	(9,794		)
	Net income (loss) per common unit	0.14				(0.91		)	(0.67		)
	Diluted income (loss) per common unit	0.13				(0.91		)	(0.67		)
	Net loss attributable to subordinated unitholders	(2,553		)		(7,823		)	(9,624		)
	Net loss per subordinated unit—(basic and diluted)	(0.21		)		(0.64		)	(0.79		)
	The unaudited pro forma information is not necessarily indicative of what our statements of operations would have been if the transaction had occurred on that date, or what the financial position or results from operations will be for any future periods. For the three and nine months ended September 30, 2014, the Onyx pipelines business contributed $1.3 million and $3.0 million, respectively, in revenues and $0.5 million and $0.9 million, respectively, in net income to our statements of operations.

NET_LOSS_INCOME_PER_LIMITED_PA

NET (LOSS) INCOME PER LIMITED PARTNER UNIT AND DISTRIBUTIONS	9 Months Ended
	Sep. 30, 2014
Earnings Per Share [Abstract]	'
NET LOSS PER LIMITED PARTNER UNIT AND DISTRIBUTIONS	'
	NET INCOME/LOSS PER LIMITED PARTNER UNIT AND DISTRIBUTIONS
	Net Income/Loss Per Limited Partner Unit
	The following is a reconciliation of the net loss attributable to our limited partners and our limited partner units and the basic and diluted earnings per unit calculations for the three and nine months ended September 30, 2014 and 2013 (in thousands, except unit and per unit data):
		Three Months Ended September 30,								Nine Months Ended September 30,
		2014				2013				2014				2013
	Net loss	$	(24,778	)		$	(4,069	)		$	(29,026	)		$	(16,645	)
	Series A Preferred Unit fair value adjustment (1)	424				4,667				(4,596		)		—
	Series A Preferred Unit in-kind distribution	$	—			$	(696	)		$	(534	)		$	(1,255	)
	General partner Unit in-kind distribution	$	(112	)		$	—			$	(123	)		$	—
	Net loss attributable to partners	$	(24,466	)		$	(98	)		$	(34,279	)		$	(17,900	)
	General partner's interest (2)	$	(523	)		$	(81	)		$	(622	)		$	(334	)
	Class B Convertible interest (2)	(6,778		)		—				(6,778		)		—
	Limited partners' interest (2)
	Common	$	(11,156	)		$	2,323			$	(19,084	)		$	(8,784	)
	Subordinated	$	(6,009	)		$	(2,340	)		$	(7,795	)		$	(8,782	)
	(1) The valuation adjustment to maximum redemption value of the Series A Preferred Unit in-kind distribution decreased the net loss attributable to partners for the three months ended September 30, 2014 and 2013 and increased the net loss attributable to partners for the nine months ended September 30, 2014 in the calculation of earnings per unit (see Note 9).
	(2) General Partner's and limited partners’ interests are calculated based on the allocation of net losses for the period, net of the allocation of Series A Preferred Unit in-kind distributions, Series A Preferred Unit fair value adjustments and General Partner unit in-kind distributions. Class B Convertible interest is calculated based on the allocation of only net losses for the period.
		Three Months Ended September 30,								Nine Months Ended September 30,
	Common Units	2014				2013				2014				2013
	Interest in net income (loss)	$	(11,156	)		$	2,323			$	(19,084	)		$	(8,784	)
	Effect of dilutive units - numerator (1)	—				(4,326		)		—				—
	Dilutive interest in net loss	$	(11,156	)		$	(2,003	)		$	(19,084	)		$	(8,784	)
	Weighted-average units - basic	22,925,979				12,222,692				20,911,472				12,219,699
	Effect of dilutive units - denominator (2)	—				1,767,445				—				—
	Weighted-average units - dilutive	22,925,979				13,990,137				20,911,472				12,219,699
	Basic net income (loss) per common unit	$	(0.49	)		$	0.19			$	(0.91	)		$	(0.72	)
	Diluted net loss per common unit	$	(0.49	)		$	(0.14	)		$	(0.91	)		$	(0.72	)
		Three Months Ended September 30,								Nine Months Ended September 30,
	Subordinated Units	2014				2013				2014				2013
	Interest in net loss	$	(6,009	)		$	(2,340	)		$	(7,795	)		$	(8,782	)
	Effect of dilutive units - numerator(1)	—				—				—				—
	Dilutive interest in net loss	$	(6,009	)		$	(2,340	)		$	(7,795	)		$	(8,782	)
	Weighted-average units - basic	12,213,713				12,213,713				12,213,713				12,213,713
	Effect of dilutive units - denominator(1)	—				—				—				—
	Weighted-average units - dilutive	12,213,713				12,213,713				12,213,713				12,213,713
	Basic and diluted net loss per subordinated unit	$	(0.49	)		$	(0.19	)		$	(0.64	)		$	(0.72	)
	(1) Because we had a net loss for the three and nine months ended September 30, 2014 and nine months ended September 30, 2013 for the common units, and for the three and nine months ended September 30, 2014 and the three and nine months ended September 30, 2013 for the subordinated units, the effect of the dilutive units would be anti-dilutive to the per unit calculation. Therefore, the weighted average units outstanding are the same for basic and dilutive net loss per unit for those periods. The weighted average units that would be included in the computation of diluted per unit amounts in accordance with the treasury stock method were 32,757,204 and 25,447,215 for the three and nine months ended September 30, 2014, respectively.
	(2) The weighted average units included in the computation of diluted per unit amounts were 27,972 unvested awards granted under our long-term incentive plan and 1,739,473 Series A Preferred Units for the three months ended September 30, 2013. The weighted average units that were not included in the computation of diluted per unit amounts were 20,221 unvested awards granted under our long-term incentive plan and 1,052,329 Series A Preferred Units for the nine months ended September 30, 2013. Diluted net income per limited partner unit reflects the potential dilution that could occur if securities or agreements to issue common units, such as awards under the LTIP (as defined in Note 12), were exercised, settled or converted into common units. When it is determined that potential common units resulting from an award should be included in the diluted net income per limited partner unit calculation, the impact is reflected by applying the treasury stock method.
	Our calculation of the number of weighted-average units outstanding includes the common units that have been awarded to our directors that are deferred under our Non-Employee Director Deferred Compensation Plan.
	All of our Series A Preferred Units were converted into common units on August 4, 2014 (see Note 9). Prior to conversion, our Series A Preferred Units were considered participating securities for purposes of the basic earnings per unit calculation during periods in which they received cash distributions. We were required to pay in-kind distributions to the Series A Preferred Units for the first four full quarters beginning the second quarter of 2013, and continued to pay these distributions until the Series A Preferred Units were converted into common units. Because the Series A Preferred Units received in-kind distributions, they have been excluded from the basic earnings per unit calculation for the three and nine months ended September 30, 2014.
	Distributions
	Our agreement of limited partnership, which was amended and restated for the third time on August 4, 2014 in order to establish the Class B Convertible Units (as amended and restated, the “Partnership Agreement”), requires that within 45 days after the end of each quarter, we distribute all of our available cash to unitholders of record on the applicable record date, as determined by our General Partner. We intend to make a minimum quarterly distribution to the holders of our common units and subordinated units of $0.40 per unit to the extent we have sufficient cash from our operations after the establishment of cash reserves and the payment of costs and expenses, including reimbursements of expenses to our General Partner. However, there is no guarantee that we will pay the minimum quarterly distribution on our units in any quarter. Beginning with the third quarter of 2014, until such time that we have a distributable cash flow divided by cash distributions ratio (“Distributable Cash Flow Ratio”) of at least 1.0, Holdings, the holder of all of our subordinated units, has waived the right to receive distributions on any subordinated units that would cause the Distributable Cash Flow Ratio to be less than 1.0.
	Paid In-Kind Distributions
	Series A Preferred Units. During the second quarter of 2013, we raised $40.0 million of equity through issuances of 1,715,000 Series A Preferred Units and an additional General Partner contribution to satisfy the requirements of our Previous Credit Facility (as defined in Note 7) (see Notes 7 and 9). Under the terms of our Partnership Agreement, we were required to pay the holders of our Series A Preferred Units quarterly distributions of in-kind Series A Preferred Units for the first four full quarters following the issuance of the units and continuing thereafter until the board of directors of our General Partner determined to begin paying quarterly distributions in cash. In-kind distributions were in the form of Series A Preferred Units at a rate of $0.40 per outstanding Series A Preferred Unit per quarter (or 7% per year of the per unit purchase price). Cash distributions were required to equal the greater of $0.40 per unit per quarter or the quarterly distribution paid with respect to each common unit. In accordance with the Partnership Agreement, our General Partner received a corresponding distribution of in-kind general partner units to maintain its 2.0% interest in us. In connection with the Holdings Transaction (see Notes 1 and 2), all holders of the Series A Preferred Units elected to convert their Series A Preferred Units into 2,015,638 common units based on a 110% exchange ratio.
	The following table represents the paid in-kind (“PIK”) distribution from the date of our initial public offering through August 4, 2014, the date on which all outstanding Series A Preferred Units were converted to common units (in thousands, except per unit and in-kind distribution units):
	Payment Date	Attributable to the Quarter Ended(1)		Per Unit Distribution					In-Kind Series A			In-Kind				In-Kind		In-Kind General Partner Distribution Value(2)
									Preferred Unit			Series A				Unit
									Distributions to Series A Preferred Holders			Preferred				Distribution
												Distributions				to General
												Value(2)				Partner
	2014
	May 15, 2014	March 31, 2014		$	0.4				31,513			$	534			643		$	11
	2013
	February 14, 2014	December 31, 2013		0.4					30,971			558				632		11
	November 14, 2013	September 30, 2013		0.4					30,439			511				621		10
	August 14, 2013	June 30, 2013		0.35			(3)		22,276			512				454		10
	14-Aug-13	30-Jun-13		0.2			(4)		2,199			51				45		1
	(1) As a result of the conversion, the Series A Preferred Unit holders (and the corresponding General Partner units) did not receive a PIK distribution for the quarters ended June 30, 2014 or September 30, 2014, but received a cash distribution on the converted common units.
	(2) The fair value was calculated as required, based on the common unit price at the quarter end date for the period attributable to the distribution, multiplied by the number of units distributed.
	(3) Per unit distribution of $0.35 corresponds to the minimum quarterly distribution of $0.40 per unit, or $1.60 on an annualized basis, pro-rated for the portion of the quarter following the issuance of 1,466,325 Series A Preferred Units and 29,925 General partner units on April 12, 2013.
	(4) Per unit distribution of $0.20 corresponds to the minimum quarterly distribution of $0.40 per unit, or $1.60 on an annualized basis, pro-rated for the portion of the quarter following the issuance of 248,675 Series A Preferred Units and 5,075 General partner units on May 15, 2013.
	Class B Convertible Units. On August 4, 2014, we established our Class B Convertible Units. The Class B Convertible Units consist of 14,633,000 of such units plus any additional Class B Convertible Units issued in-kind as a distribution (“Class B PIK Units”). Commencing with the quarter ended September 30, 2014 and until converted, as long as certain requirements are met, the holders of the Class B Convertible Units will receive quarterly distributions in an amount equal to $0.3257 per unit. These distributions will be paid quarterly in Class B PIK Units within 45 days after the end of each quarter. Our General Partner was entitled, and has exercised its right, to retain its 2.0% general partner interest in us in connection with the original issuance of Class B Convertible Units. In connection with future distributions of Class B PIK Units, the General Partner is entitled to a corresponding distribution to maintain its 2.0% general partner interest in us. The Class B Convertible Units have the same rights, preferences and privileges, and are subject to the same duties and obligations, as our common units, with certain exceptions. See Note 10.
	The following table represents the PIK distribution earned on the Class B Convertible Units for periods after August 4, 2014 and ended September 30, 2014 (in thousands, except per unit and in-kind distribution units):
Payment Date	Attributable to the Quarter Ended		Per Unit Distribution					In-Kind Class B Convertible Unit			In-Kind				In-Kind		In-Kind General Partner Distribution Value(1)
								Distributions to Class B Convertible Holders			Class B Convertible Distributions				Unit
											Value(1)				Distribution
															to General
															Partner
November 14, 2014	September 30, 2014		$	0.3257				256,078			$	5,467			5,226		$	112
(1) The fair value was calculated as required, based on the common unit price at the quarter end date for the period attributable to the distribution, multiplied by the number of units distributed.
Cash Distributions
The following table represents our distributions declared for the quarterly periods from the date of our initial public offering (in thousands, except per unit data):
							Distributions
	Attributable to the		Per Unit				Limited Partners
Payment Date	Quarter Ended		Distribution				Common				Subordinated				General Partner			Total
2014
November 14, 2014	September 30, 2014		$	0.4		(1)	$	9,520			$	—			$	413		$	9,933
August 14, 2014	June 30, 2014		0.4			(1)	9,399				4,886				290			14,575
15-May-14	March 31, 2014		0.4				8,586				4,886				290			13,762
2013
February 14, 2014	December 31, 2013		0.4				8,581				4,885				289			13,755
November 14, 2013	September 30, 2013		0.4				4,888				4,885				214			9,987
August 14, 2013	June 30, 2013		0.4				4,890				4,886				210			9,986
15-May-13	March 31, 2013		0.4				4,888				4,886				199			9,973
2012
February 14, 2013	December 31, 2012		0.24			(2)	2,931				2,931				120			5,982
(1) The common unit distribution in the table above includes the distribution payment to the Series A Preferred unitholders for their Series A Preferred Units converted into common units or to the units that vested as part of our LTIP (as defined in Note 12) as a result of the Holdings Transaction (see Notes 1, 9 and 12).
(2) Per unit distribution of $0.24 corresponds to the minimum quarterly distribution of $0.40 per unit, or $1.60 on an annualized basis, pro-rated for the portion of the quarter following the closing of our initial public offering on November 7, 2012.

FINANCIAL_INSTRUMENTS

FINANCIAL INSTRUMENTS	9 Months Ended
	Sep. 30, 2014
Investments, All Other Investments [Abstract]	'
FINANCIAL INSTRUMENTS	'
	FINANCIAL INSTRUMENTS
	Fair Value Measurements
	We apply recurring fair value measurements to our financial assets and liabilities. In estimating fair value, we generally use a market approach and incorporate assumptions that market participants would use in pricing the asset or liability, including assumptions about risk and/or the risks inherent in the inputs to the valuation techniques. The fair value measurement inputs we use vary from readily observable inputs that represent market data obtained from independent sources to unobservable inputs that reflect our own market assumptions that cannot be validated through external pricing sources. Based on the observability of the inputs used in the valuation techniques, the financial assets and liabilities carried at fair value in the financial statements are classified as follows:
	•	Level 1—Represents unadjusted quoted market prices in active markets for identical assets or liabilities that are accessible at the measurement date. This category primarily includes our cash and cash equivalents, accounts receivable and accounts payable.
	•	Level 2—Represents quoted market prices for similar assets or liabilities in active markets, quoted market prices in markets that are not active or other inputs that are observable or can be corroborated by observable market data. This category primarily includes variable rate debt, over-the-counter swap contracts based upon natural gas price indices and interest rate swaps.
	•	Level 3—Represents derivative instruments whose fair value is estimated based on internally developed models and methodologies utilizing significant inputs that are generally less readily observable from market sources. We do not have financial assets and liabilities classified as Level 3.
	In certain cases, the inputs used to measure fair value may fall into different levels of the fair value hierarchy. In such cases, the level in the fair value hierarchy must be determined based on the lowest level input that is significant to the fair value measurement. An assessment of the significance of a particular input to the fair value measurement in its entirety requires judgment and consideration of factors specific to the asset or liability.
	The carrying amounts of cash and cash equivalents, accounts receivable and accounts payable represent fair values based on the short-term nature of these instruments. The fair value of the debt funded through our credit facilities approximates its carrying amount due primarily to the variable nature of the interest rate of the instrument and is considered a Level 2 fair value measurement.
	Derivative Financial Instruments
	Interest Rate Swaps
	We manage a portion of our interest rate risk through interest rate swaps. In March 2012, we terminated an interest rate cap contract and entered into an interest rate swap contract with Wells Fargo, N.A. The interest rate swap had a notional value of $150.0 million, and a maturity date of June 30, 2014. We received a floating rate based upon one-month LIBOR and paid a fixed rate under the interest rate swap of 0.54%.
	The interest rate swap was designated as a cash flow hedge for accounting purposes at inception of the contract and, thus, to the extent the cash flow hedge was effective, unrealized gains and losses were recorded to accumulated other comprehensive income/loss and recognized in interest expense as the underlying hedged transactions (interest payments) were recorded. Any hedge ineffectiveness was recognized in interest expense immediately. We did not have any hedge ineffectiveness during the three and nine months ended September 30, 2014 and 2013.
	In February 2014, we discontinued cash flow hedge accounting on a prospective basis as a result of the $148.5 million repayment of borrowings under our Previous Credit Facility (as defined in Note 7). The fair value of the interest rate swap recorded in accumulated other comprehensive loss at the cash flow hedge de-designation date was $0.1 million. This balance was reclassified into interest expense as interest on the hedged debt was recorded. No ineffectiveness was recorded as a result of the cash flow hedge de-designation. Changes in the fair value of the interest rate swap for the remainder of the contract term were recognized in interest expense.
	We enter into interest rate swap contracts whereby we receive a floating rate and pay a fixed rate to reduce the risk associated with the variability of interest rates for our term loan borrowings. Beginning June 30, 2014, these interest rate swaps are not designated as cash flow hedges and as a result, changes in the fair value of the interest rate swaps are recognized in interest expense immediately.
	The fair value of our interest rate swaps is determined based on a discounted cash flow method using the contractual terms of the swaps. The floating coupon rate is based on observable rates consistent with the frequency of the interest cash flows.
	We have elected to present our interest rate swaps net on the balance sheets. There was no effect of offsetting on the balance sheets as of September 30, 2014 or December 31, 2013. Our interest rate swap position was as follows (in thousands):
												Estimated Fair Value
	Notional Amount				Fixed Rate			Effective Date		Maturity Date		September 30, 2014
	$	140,000			0.327	%		June 30, 2014		June 30, 2015		$	(140	)
	50,000				1.198	%		September 30, 2014		June 30, 2016		(31		)
	50,000				1.196	%		September 30, 2014		June 30, 2016		(30		)
												$	(201	)
	The fair values of our interest rate swap liabilities were as follows (in thousands):
		Significant Other Observable Inputs (Level 2)
		Fair Value Measurement as of
		30-Sep-14				31-Dec-13
	Current interest rate swap liabilities	$	175			$	263
	Non-current interest rate swap liabilities	26				—
	Total interest rate swap liabilities	$	201			$	263
	The effect of the interest rate swap designated as a cash flow hedge in our statements of changes in partners’ capital and comprehensive loss was as follows (in thousands):
		Three Months Ended September 30,								Nine Months Ended September 30,
		2014				2013				2014				2013
	Change in value recognized in other comprehensive loss - effective portion	$	—			$	(82	)		$	(11	)		$	(112	)
	Loss reclassified from accumulated other comprehensive loss to interest expense	—				108				221				302
	There were no amounts of gains or losses reclassified into earnings as a result of the discontinuance of cash flow hedge accounting due to the lack of probability of the forecasted transaction occurring.
	The realized and unrealized amounts recognized in interest expense associated with derivatives that are not designated as hedging instruments were as follows (in thousands):
		Three Months Ended September 30,								Nine Months Ended September 30,
		2014				2013				2014				2013
	Realized loss on interest rate swap derivatives	$	(74	)		$	(27	)		$	(127	)		$	(81	)
	Unrealized loss on interest rate swap derivatives	(21		)		—				(201		)		—
	Commodity Swaps
	In our normal course of business, we periodically enter into month-ahead swap contracts to hedge our exposure to certain intra-month natural gas index pricing risk. The total volume for the outstanding month-ahead swap contracts as of September 30, 2014 and December 31, 2013 was 40,000 MMBtu per day and 33,722 MMBtu per day, respectively. We define these contracts as Level 2 because the index price associated with such contracts is observable and tied to a similarly quoted first-of-the-month natural gas index price.
	We have elected to present our commodity swaps net on the balance sheets. We did not have any cash collateral received or paid on our commodity swaps as of September 30, 2014 or December 31, 2013. The effect of offsetting on the balance sheets were as follows (in thousands):
			30-Sep-14								31-Dec-13
			Other Current Assets				Other Current Liabilities				Other Current Assets				Other Current Liabilities
	Gross amounts of recognized assets (liabilities)		$	—			$	(218	)		$	140			$	(20	)
	Gross amounts offset on the balance sheets		—				—				(20		)		20
	Net amount		$	—			$	(218	)		$	120			$	—
	The realized and unrealized gain/loss on these derivatives, recognized in revenues in our statements of operations, were as follows (in thousands):
		Three Months Ended September 30,								Nine Months Ended September 30,
		2014				2013				2014				2013
	Realized gain (loss) on commodity swap derivatives	$	213			$	(93	)		$	(875	)		$	(149	)
	Unrealized loss on commodity swap derivatives	(207		)		—				(338		)		—

LONGLIVED_ASSETS

LONG-LIVED ASSETS	9 Months Ended
	Sep. 30, 2014
Property, Plant and Equipment [Abstract]	'
LONG-LIVED ASSETS	'
	LONG-LIVED ASSETS
	Property, Plant and Equipment
	Property, plant and equipment consisted of the following (in thousands):
		Estimated	30-Sep-14			31-Dec-13
		Useful Life (yrs)
	Pipelines	30	$	393,131		$	344,721
	Gas processing, treating and other plants	15	481,939			254,133
	Compressors	7	37,936			20,030
	Rights of way and easements	15	26,338			20,729
	Furniture, fixtures and equipment	5	3,610			3,347
	Capital lease vehicles	5-Mar	1,946			1,396
	Total property, plant and equipment		944,900			644,356
	Accumulated depreciation and amortization		(118,565		)	(79,908		)
	Total		826,335			564,448
	Construction in progress		96,090			6,039
	Land and other		25,503			5,308
	Property, plant and equipment, net		$	947,928		$	575,795
	Depreciation is provided using the straight-line method based on the estimated useful life of each asset.
	In January 2013, we shut down our Gregory facility to perform extensive turnaround maintenance activities and to connect additional equipment to enhance NGL recoveries. As the turnaround maintenance was nearing completion in January 2013, we experienced a fire at this facility. In connection with the fire, as of September 30, 2014, we spent $5.8 million to return the facility to service and filed an insurance claim related to these costs. We recovered $1.0 million in 2013 and $0.6 million in 2014 from insurance proceeds for this loss and believe it is probable that we will recover the remaining costs, less a $0.3 million deductible, under our insurance policies. As of September 30, 2014, we have $3.9 million related to this recovery included in current assets in our balance sheet.
	Intangible Assets
	Intangible assets of $1.5 million and $1.6 million as of September 30, 2014 and December 31, 2013, respectively, represent the unamortized value assigned to long-term supply and gathering contracts acquired in 2011. These intangible assets are amortized on a straight-line basis over the 30-year expected useful lives of the contracts through 2041. Amortization expense over the next five years related to intangible assets is not significant.

LONGTERM_DEBT

LONG-TERM DEBT	9 Months Ended
	Sep. 30, 2014
Debt Disclosure [Abstract]	'
LONG-TERM DEBT	'
	LONG-TERM DEBT
	Our outstanding debt and related information at September 30, 2014 and December 31, 2013 are as follows (in thousands):
		30-Sep-14			31-Dec-13
	Credit facility	$	9,000		$	267,300
	Term loans	448,875			—
	Total long-term debt	$	457,875		$	267,300
	Outstanding letters of credit	$	23,030		$	31,260
	Remaining unused borrowings	$	167,970		$	69
		Three Months Ended September 30,						Nine Months Ended September 30,
		2014			2013			2014			2013
	Weighted average interest rate	4.8		%	4.8		%	4.2		%	4.3		%
	Average outstanding borrowings	$	372,072		$	254,200		$	252,005		$	238,900
	Maximum borrowings	$	465,000		$	258,500		$	465,000		$	258,500
	Previous Credit Facility
	In November 2012, we entered into a five-year $350.0 million revolving credit facility (as amended, the “Previous Credit Facility”). Borrowings under the Previous Credit Facility were set to mature in November 2017. We utilized the Previous Credit Facility for working capital requirements and capital expenditures, the purchase of assets, the payment of distributions and other general purposes. During 2013 and the first quarter of 2014, we entered into a total of four amendments to the Previous Credit Facility, primarily as a result of some operational challenges including the start up of our Bonnie View fractionator, the January 2013 fire at our Gregory facility and contractual disputes with a former third party processor. These impacted our operating results adversely and resulted in the need for the various amendments to our Previous Credit Facility. In connection with these amendments, our availability was reduced from $350.0 million to the sum of $250.0 million plus any amounts placed on deposit in a collateral account of our General Partner and letters of credit outstanding. This availability was again increased to $350.0 million in connection with the fourth amendment in March 2014. In connection with the closing of the TexStar Rich Gas System Transaction, we refinanced our Previous Credit Facility and entered into a new term loan agreement.
	Senior Credit Facilities
	On August 4, 2014, in connection with the consummation of the Contribution, we entered into (a) a Third Amended and Restated Revolving Credit Agreement with Wells Fargo Bank, N.A., as Administrative Agent, UBS Securities LLC and Barclays Bank PLC, as Co-Syndication Agents, JPMorgan Chase Bank, N.A., as Documentation Agent, and a syndicate of lenders (the “Third A&R Revolving Credit Agreement”) and (b) a Term Loan Credit Agreement with Wells Fargo Bank, N.A., as Administrative Agent, UBS Securities LLC and Barclays Bank PLC, as Co-Syndication Agents, and a syndicate of lenders (the “Term Loan Agreement” and, together with the Third A&R Revolving Credit Agreement, the “Senior Credit Facilities”). The initial borrowings and extensions of credit under the Term Loan Agreement were used to finance the TexStar Rich Gas System Transaction (including the immediate repayment of the $100 million of debt assumed in the transaction), the repayment of certain of our existing debt and the payment of fees and expenses in connection with the new debt arrangements and ongoing working capital and other general partnership purposes. No amounts were initially drawn on the Third A&R Revolving Credit Agreement. Substantially all of our assets are pledged as collateral under the Senior Credit Facilities, with the security interest of the facilities ranking pari passu.
	Third A&R Revolving Credit Agreement
	The Third A&R Revolving Credit Agreement is a five-year $200 million revolving credit facility (the “Credit Facility”). Borrowings under our Credit Facility bear interest at the London Interbank Offered Rate (“LIBOR”) plus an applicable margin or a base rate as defined in the respective credit agreement. Pursuant to the Third A&R Revolving Credit Agreement, among other things:
	(a)	the letters of credit sublimit increased to $75 million;
	(b)	we have the right to increase the total commitments under the Credit Facility by obtaining additional commitments from other lenders, as long as our senior secured leverage ratio is less than or equal to 4.50 to 1.00 before and after giving effect to such increase, subject to certain other conditions;
	(c)	the definition of “Change of Control” is amended to permit the combination transaction with TexStar and to reflect the Sponsors’ control of the General Partner;
	(d)	our maximum consolidated total leverage ratio is set at (i) 5.75 to 1.00 as of the last day of the fiscal quarter ending each of September 30, 2014 and December 31, 2014, (ii) 5.50 to 1.00 as of the last day of the fiscal quarter ending March 31, 2015, (iii) 5.25 to 1.00 as of the last day of the fiscal quarter ending June 30, 2015 and (iv) 5.00 to 1.00 as of the last day of each fiscal quarter thereafter, in each case, without any step-ups in connection with acquisitions;
	(e)	we have the right, exercisable on or before the date that our annual audited financial statements are due for the 2014 fiscal year, to comply with the consolidated total leverage ratio, consolidated senior secured leverage ratio and the consolidated interest coverage ratio covenants (the “Financial Covenants”) by applying certain specified quarterly base periods pertaining to the TexStar Rich Gas System;
	(f)	if we fail to comply with the Financial Covenants (a “Financial Covenant Default”), we have the right (which cannot be exercised more than two times in any 12-month period or more than four times during the term of the facility) to cure such Financial Covenant Default by having the Sponsors purchase equity interests in or make capital contributions to us resulting in, among other things, proceeds that, if added to consolidated EBITDA, as defined in the Third A&R Revolving Credit Agreement, would result in us satisfying the Financial Covenants;
	(g)	certain definitions are amended to take into account the TexStar Rich Gas System; and
	(h)	the negative covenants are amended to permit the entry into, and indebtedness under, the Term Loan Agreement.
	Term Loan Agreement
	The Term Loan Agreement is a seven-year $450 million senior secured term loan facility. On August 4, 2014, the lenders funded the full amount of the facility. Borrowings under our Term Loan Agreement bear interest at LIBOR plus 4.25% or a base rate as defined in the respective credit agreement with a LIBOR floor of 1.00%. Under the Term Loan Agreement, among other things:
	(a)	subject to certain requirements, including the absence of a default and pro forma compliance under the Third A&R Revolving Credit Agreement and pro forma compliance with a senior secured leverage ratio less than or equal to 4.50 to 1.00 before and after giving effect to such increase, we may from time to time request incremental term loan commitments subject to certain other conditions;
	(b)	we may seek commitments from third party lenders in connection with any incremental term loan commitment requests, subject to certain consent rights given to the administrative agent;
	(c)	the guarantors and the collateral are the same as provided for the benefits of lenders in the Third A&R Revolving Credit Agreement;
	(d)	subject to certain conditions, we may request that the lenders extend the seven-year maturity of all or a portion of the outstanding loans under the facility;
	(e)	the facility will amortize in equal quarterly installments in an aggregate annual amount equal to 1% of the original principal amount of the initial loan ($1.125 million), with the remainder due on the maturity date;
	(f)	there are customary mandatory prepayment provisions and, subject to certain conditions, permissive prepayment provisions; provided, that if certain repricing transactions occur, we must pay a call premium equal to 1% of the principal amount of the loans subject to the repricing transactions; and
	(g)	there are customary representations and warranties, affirmative covenants, negative covenants and provisions governing an event of default (including acceleration of payment in connection with material indebtedness, including the Third A&R Revolving Credit Agreement).

COMMITMENTS_AND_CONTINGENCIES

COMMITMENTS AND CONTINGENCIES	9 Months Ended
	Sep. 30, 2014
Commitments and Contingencies Disclosure [Abstract]	'
COMMITMENTS AND CONTINGENCIES	'
	COMMITMENTS AND CONTINGENCIES
	Legal Matters
	In March 2013, one of our subsidiaries filed suit against Formosa Hydrocarbons Company, Inc. (“Formosa”). The lawsuit seeks recoveries of losses that we believe our subsidiary experienced as a result of the failure of Formosa to perform certain of its obligations under the gas processing and sales contract between the parties. Formosa filed a response generally denying our claims and filed counterclaims against our subsidiary claiming our affiliate breached the gas processing and sales contract and breached a related agreement between the parties for the supply by Formosa of residue gas to a third party on behalf of our subsidiary. Our subsidiary will defend itself vigorously against the counterclaims while continuing to pursue its own claims. A trial date in early 2015 is expected. We cannot predict the outcome of such litigation or the timing of any related recoveries or payments.
	From time to time, we are party to certain legal or administrative proceedings that arise in the ordinary course and are incidental to our business. For example, during periods when we are expanding our operations through the development of new pipelines or the construction of new plants, we may become involved in disputes with landowners that are in close proximity to our activities. While we are currently involved in several such proceedings and disputes, our management believes that none of such proceedings or disputes will have a material adverse effect on our results of operations, cash flows or financial condition. However, future events or circumstances, currently unknown to management, will determine whether the resolution of any litigation or claims ultimately will have a material effect on our results of operations, cash flows or financial condition in any future reporting periods.
	Regulatory Compliance
	In the ordinary course of our business, we are subject to various laws and regulations. In the opinion of our management, compliance with current laws and regulations will not have a material effect on our results of operations, cash flows or financial condition.
	Leases
	Capital Leases
	We have auto leases classified as capital leases. The termination dates of the lease agreements vary from 2014 to 2018. We recorded amortization expense related to the capital leases of $0.1 million and $0.4 million for the three and nine months ended September 30, 2014, respectively. We recorded amortization expense related to the capital leases of $0.1 million and $0.4 million for the three and nine months ended September 30, 2013, respectively. The capital lease obligation amounts included on the balance sheets were as follows (in thousands):
		September 30, 2014		December 31, 2013
	Other current liabilities	$	484	$	481
	Other non-current liabilities	569		427
	Total	$	1,053	$	908
	Capital leases entered into during the three and nine months ended September 30, 2014 were $0.1 million and $0.6 million, respectively. Capital leases entered into during the three and nine months ended September 30, 2013 were $0.2 million and $1.4 million, respectively.
	Operating Leases
	We maintain operating leases in the ordinary course of business. These leases include those for office and other operating facilities and equipment. The termination dates of the lease agreements vary from 2014 to 2025. Expenses associated with operating leases, recorded in operations and maintenance expenses and general and administrative expenses in our statements of operations, were $0.6 million and $1.2 million for the three and nine months ended September 30, 2014, respectively. Expenses associated with operating leases were $0.4 million and $1.1 million for the three and nine months ended September 30, 2013, respectively.
	Purchase Commitments
	As of September 30, 2014, we had commitments of approximately $25.4 million for purchases of material and equipment related to our capital projects, primarily the construction of an addition to our pipeline system by approximately 45 miles into Webb County, Texas (the “Webb Pipeline”). We have other planned capital projects that are discretionary in nature, with no substantial contractual capital commitments made in advance of the actual expenditures.

TRANSACTIONS_WITH_RELATED_PART

TRANSACTIONS WITH RELATED PARTIES	9 Months Ended
	Sep. 30, 2014
Related Party Transactions [Abstract]	'
TRANSACTIONS WITH RELATED PARTIES	'
	TRANSACTIONS WITH RELATED PARTIES
	Charlesbank, EIG & Tailwater (the Sponsors)
	Effective August 4, 2014, in connection with the Contribution and as a result of the Holdings Transaction, the board of directors of our General Partner includes one person affiliated with Charlesbank, one person affiliated with EIG, one person affiliated with Tailwater and three outside directors. The seventh member of the board of directors of our General Partner and its chairman was selected by a majority of the other directors. David W. Biegler will serve as the chairman from August 2014 for two years or until his earlier death or resignation. Our non-employee directors are reimbursed for certain expenses incurred for their services to us. The director services fees and expenses are included in general and administrative expenses in our statements of operations. We incurred fees and expenses related to the services from our affiliated directors as follows (in thousands):
		Three Months Ended September 30,				Nine Months Ended September 30,
		2014		2013		2014		2013
	Charlesbank	$	80	$	51	$	270	$	387
	EIG	8		—		8		—
	Tailwater	8		—		8		—
	Total fees and expenses paid for director services to affiliated entities	$	96	$	51	$	286	$	387
	Southcross Energy Partners GP, LLC (our General Partner)
	Our General Partner does not receive a management fee or other compensation for its management of us. However, our General Partner and its affiliates are entitled to reimbursements for all expenses incurred on our behalf, including, among other items, compensation expense for all employees required to manage and operate our business. We incurred expenses related to these reimbursements as follows (in thousands):
		Three Months Ended September 30,				Nine Months Ended September 30,
		2014		2013		2014		2013
	Reimbursements included in general and administrative expenses	$	3,076	$	2,624	$	9,057	$	7,564
	Reimbursements included in operations and maintenance expenses	4,562		3,596		12,175		9,904
	Total reimbursements to our General Partner and its affiliates	$	7,638	$	6,220	$	21,232	$	17,468
	Compensation expense for services incurred by us on behalf of Southcross Energy LLC were billed to Southcross Energy LLC. For the three and nine months ended September 30, 2014, compensation expense, which was not incurred on our behalf, of $0.4 million and $0.7 million, respectively, was billed to Southcross Energy LLC.
	During the second quarter of 2013, we issued and sold 1,715,000 Series A Preferred Units to Southcross Energy LLC for a cash purchase price of $22.86 per Series A Preferred Unit, in a privately negotiated transaction. After the Series A Preferred Units issuance during the second quarter of 2013, Southcross Energy LLC sold 1,500,000 of the units to third parties. All of the Series A Preferred Units, including those held by Southcross Energy LLC, were converted into common units on August 4, 2014. See Notes 1 and 9.
	Wells Fargo Bank, N.A.
	Under our Senior Credit Facilities, Wells Fargo Bank, N.A. serves as the administrative agent (and served in that same capacity under our Previous Credit Facility). See Note 7. An affiliate of Wells Fargo Bank, N.A. is a member of the investor group. We entered into amendments to our Previous Credit Facility during 2013 and 2014. In addition, in connection with the TexStar Rich Gas System Transaction, during the third quarter of 2014, we entered into the Senior Credit Facilities, which include syndicates of financial institutions and other lenders. Affiliates of Wells Fargo Bank, N.A. have from time to time engaged in commercial banking and financial advisory transactions with us in the normal course of business. During the three and nine months ended September 30, 2014, we incurred costs, excluding interest, to Wells Fargo Bank, N.A. and its affiliates of $8.9 million and $9.1 million, respectively. During the three and nine months ended September 30, 2013, we incurred costs, excluding interest, to Wells Fargo Bank, N.A. and its affiliates of $0.4 million and $1.0 million, respectively. When incurred, these costs were capitalized to deferred financing costs (see Notes 7 and 17).
	Other Transactions with Affiliates
	In conjunction with the TexStar Rich Gas System Transaction, we entered into a gas gathering and processing agreement (the “G&P Agreement”) and an NGL sales agreement (the “NGL Agreement”) with an affiliate of Holdings. Under the terms of these agreements, we transport, process and sell rich natural gas for the affiliate in return for fees that are substantially equivalent to the fees that Holdings receives from its customers for such services, and we can sell natural gas liquids that we own to Holdings at prices that are substantially equivalent to prices that Holdings receives from third parties. In the future, when Holdings’ fractionation facility is operational, the NGL Agreement will permit us to utilize Holdings’ fractionation services at market-based rates.
	During the three and nine months ended September 30, 2014, the Partnership recorded revenues from affiliates of $6.3 million in accordance with the G&P Agreement and the NGL Agreement. Accounts receivable due from affiliates of $7.0 million as of September 30, 2014 is comprised of primarily (a) $3.1 million due from Holdings relating to gathering and processing services in the period and (b) $2.8 million due from T2 Cogen (as defined in Note 14) representing reimbursements for operating costs and equipment for this investment in joint venture. Accounts payable due to affiliates of $5.0 million as of September 30, 2014 is comprised of primarily (a) $3.0 million due to Holdings relating to reimbursements of insurance costs and capital costs and (b) $1.1 million due to T2 Cogen representing operational obligations for this investment in joint venture.

SERIES_A_PREFERRED_UNITS

SERIES A PREFERRED UNITS	9 Months Ended
	Sep. 30, 2014
Preferred Units Description and Other Disclosures [Abstract]	'
SERIES A PREFERRED UNITS	'
	PREFERRED UNITS
	We entered into a Series A Convertible Preferred Unit Purchase Agreement (the “Purchase Agreement”) with Southcross Energy LLC, pursuant to which we issued and sold 1,715,000 Series A Preferred Units to Southcross Energy LLC during the second quarter of 2013 for a cash purchase price of $22.86 per unit, in a privately negotiated transaction (the “Private Placement”). Southcross Energy LLC sold 1,500,000 of these Series A Preferred Units to third parties during the second quarter of 2013. The Private Placement resulted in proceeds to us of $39.2 million. We also received a $0.8 million capital contribution from our General Partner to maintain its 2.0% general partner interest in us. Our total capital infusion of $40.0 million, from all sales of Series A Preferred Units and General Partner capital contributions, was used to reduce borrowings under our Previous Credit Facility (see Note 7).
	All of the Series A Preferred Units, including units held by Southcross Energy LLC, were converted to common units on August 4, 2014 in connection with the Holdings Transaction. See Note 1 and below.
	Because the Series A Preferred Units were equity instruments and redeemable at the option of the holder, they were classified outside of permanent equity. The change of control rights associated with the Series A Preferred Units required the units to be classified outside of permanent equity. The Series A Preferred Units were periodically adjusted to maximum redemption value because the maximum redemption value was different than the fair value of the units at issuance.
	Voting Rights: The Series A Preferred Units were a class of voting equity security ranking senior to all of our other classes or series of equity securities with respect to distribution rights and rights upon liquidation. The Series A Preferred Units had voting rights identical to the voting rights of the common units and voted with the common units as a single class, such that each Series A Preferred Unit (including each Series A Preferred Unit issued as an in-kind distribution, discussed below) was entitled to one vote for each common unit into which such Series A Preferred Unit was convertible on each matter with respect to which each common unit was entitled to vote.
	Distribution Rights: Holders of Series A Preferred Units were entitled to quarterly distributions of in-kind Series A Preferred Units for the first four full quarters following the issue date of those units and continuing thereafter until the board of directors of our General Partner determined to begin paying quarterly distributions in cash, and thereafter in cash. In-kind distributions were in the form of Series A Preferred Units at a rate of $0.40 per outstanding Series A Preferred Unit per quarter (or 7% per year of the per unit purchase price). Cash distributions equaled the greater of $0.40 per unit per quarter or the quarterly distribution paid with respect to each common unit.
	Conversion Rights: The Series A Preferred Units were convertible into common units based on an exchange ratio of 110% of the Series A Preferred Units if a third party acquired majority ownership control of our General Partner or we sold substantially all of our assets, in either case before January 1, 2015. In connection with the Holdings Transaction and pursuant to the change in control provision in our partnership agreement applicable to our Series A Preferred Units, all holders of the Series A Preferred Units elected to convert their Series A Preferred Units into 2,015,638 common units based on the 110% exchange ratio.
	Dissolution and Liquidation: The Series A Preferred Units were senior to our common units with respect to rights on dissolution and liquidation. Common units issued upon conversion of the Series A Preferred Units have equal ranking with the rest of our common units with respect to rights on dissolution and liquidation.

PARTNERS_CAPITAL

PARTNERS' CAPITAL	9 Months Ended
	Sep. 30, 2014
Partners' Capital Notes [Abstract]	'
PARTNERS' CAPITAL	'
	PARTNERS’ CAPITAL
	Ownership
	Our units outstanding as of September 30, 2014 is as follows (in units):
				Partners’ Capital
					Southcross
		Series A		Public	Energy LLC		Holdings	Class B		General
		Preferred		Common	Common		Common	Convertible	Subordinated	Partner
	Units outstanding as of December 31, 2013	1,769,915		10,390,272	1,863,713		—	—	12,213,713	534,638
	Issuance of common units	—		9,200,000	—		—	—	—	187,755
	Holdings Transaction	—		—	(1,863,713	)	1,863,713	—	—	—
	Series A Convertible preferred conversion to common units	(1,832,399	)	1,762,951	—		252,687	—	—	—
	Issuance of Class B Convertible units	—		—	—		—	14,633,000	—	—
	Vesting of LTIP units, net	—		331,320	—		—	—	—	—
	In-kind distributions and general partner issuances to maintain 2.0% ownership	62,484		—	—		—	—	—	311,233
	Units outstanding as of September 30, 2014	—		21,684,543	—		2,116,400	14,633,000	12,213,713	1,033,626
	Common Units
	In February 2014, we completed a public equity offering of 9,200,000 additional common units for $144.7 million, net of expenses, and received a capital contribution from our General Partner to maintain its 2.0% interest in us. The net proceeds from the offering were used for our Onyx acquisition in March 2014, to fund the construction of our Webb Pipeline and for general partnership purposes.
	Our common units represent limited partner interests in us. The holders of our common units are entitled to participate in partnership distributions and are entitled to exercise the rights and privileges available to limited partners under our Partnership Agreement. In connection with the TexStar Rich Gas System Transaction and the Holdings Transaction on August 4, 2014, we issued Class B Convertible Units, accelerated the vesting of awards under our LTIP (see Note 12), and all of the holders of our Series A Preferred Units elected to convert their Series A Preferred Units into common units based on an exchange ratio of 110%.
	Class B Convertible Units
	On August 4, 2014, we established our Class B Convertible Units. The Class B Convertible Units consist of 14,633,000 of such units plus any additional Class B PIK Units. The Class B Convertible Units have the same rights, preferences and privileges, and are subject to the same duties and obligations, as our common units, with certain exceptions as noted below.
	The Partnership Agreement does not allow additional Class B Convertible Units (other than Class B PIK Units) to be issued without the prior approval of our General Partner and the holders of a majority of the outstanding Class B Convertible Units.
	The Partnership Agreement provides that we will procure the listing of the common units issuable upon conversion of the Class B Convertible Units on the New York Stock Exchange or other applicable national securities exchange.
	Distributions Rights: Commencing with the third quarter of 2014 and until converted, as long as certain requirements are met, the holders of the Class B Convertible Units will receive quarterly distributions in an amount equal to $0.3257 per unit. These distributions will be paid quarterly in Class B PIK Units within 45 days after the end of each quarter. Our General Partner was entitled, and has exercised its right, to retain its 2.0% general partner interest in us in connection with the original issuance of Class B Convertible Units. In connection with future distributions of Class B PIK Units, the General Partner is entitled to a corresponding distribution to maintain its 2.0% general partner interest in us.
	Conversion Rights: The Class B Convertible Units are convertible into common units on a one-for-one basis and, once converted, will participate in cash distributions pari passu with all other common units. The conversion of Class B Convertible Units will occur on the date we (a) make a quarterly distribution equal to or greater than $0.44 per common unit, (b) generate Class B Distributable Cash Flow (as defined in the Partnership Agreement) in an amount sufficient to pay the declared distribution on all units for the two quarters immediately preceding the date of conversion (the “measurement period”) and (c) forecast paying a distribution equal to or greater than $0.44 per unit from forecasted Class B Distributable Cash Flow on all outstanding common units for the two quarters immediately following the measurement period.
	Voting Rights: The Class B Convertible Units generally have the same voting rights as common units, and will have one vote for each common unit into which such units are convertible.
	Changes in Partners’ Capital due to Holdings Transaction
	As discussed in Note 1, on August 4, 2014, Southcross Energy LLC and TexStar combined. As a result of this transaction, Holdings, through a wholly-owned subsidiary, (a) acquired 100% of TexStar and its general partner from BBTS Borrower LP and (b) acquired 2,116,400 of our common units and 12,213,713 of our subordinated units from Southcross Energy LLC. Thus, Holdings owns an approximate 39.8% limited partner interest in us, as well as 100% of our General Partner, which owns an approximate 2.0% interest in us and our incentive distribution rights. BBTS Borrower LP is controlled by EIG and Tailwater and Southcross Energy LLC is controlled by Charlesbank. The Holdings Transaction resulted in the Sponsors each indirectly owning approximately one-third of Holdings.
	Subordinated Units
	Subordinated units represent limited partner interests in us and convert to common units at the end of the Subordination Period (as defined in our Partnership Agreement). The principal difference between our common units and our subordinated units is that in any quarter during the Subordination Period, holders of the subordinated units are not entitled to receive any distribution of available cash until the common units have received the minimum quarterly distribution plus any arrearages in the payment of the minimum quarterly distribution from prior quarters. Subordinated units do not accrue arrearages. Beginning with the third quarter of 2014, until such time we have a Distributable Cash Flow Ratio of at least 1.0, the holder of the subordinated units has waived the right to receive distributions on any subordinated units that would cause the Distributable Cash Flow Ratio to be less than 1.0.
	General Partner Interests
	Our general partner interests consisted of 1,033,626 and 534,638 general partner units as of September 30, 2014 and December 31, 2013, respectively. In connection with other equity issuances including issuances related to the TexStar Rich Gas System Transaction and the Holdings Transaction, our General Partner has made capital contributions in exchange for an issuance of additional general partner units to maintain its 2.0% ownership interest in us. Also, the General Partner has received general partner unit PIK distributions from the general partner units purchased in connection with the Private Placement (see Note 9).

INCENTIVE_COMPENSATION

INCENTIVE COMPENSATION	9 Months Ended
	Sep. 30, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]	'
INCENTIVE COMPENSATION	'
	INCENTIVE COMPENSATION
	Unit Based Compensation
	Long-Term Incentive Plan
	On November 7, 2012, and in connection with our initial public offering, we established our 2012 Long-Term Incentive Plan (“LTIP”), which provides incentive awards to eligible officers, employees and directors of our General Partner. Awards granted to employees under the LTIP vest over a three-year period in equal annual installments or in the event of a change in control of our General Partner in either a common unit or an amount of cash equal to the fair market value of a common unit at the time of vesting, as determined by management at its discretion. These awards also include distribution equivalent rights that grant the holder the right to receive an amount equal to the cash distributions on common units during the period the award remains outstanding.
	The following table summarizes information regarding awards of units granted under the LTIP:
		Units		Weighted-Average Fair
				Value at Grant Date
	Unvested - December 31, 2013	182,673		$	22.55
	Granted units	776,821		19.82
	Forfeited units	(200	)	23.01
	Units recaptured for tax withholdings	(159,500	)	17.06
	Vested units	(325,551	)	17.45
	Unvested - September 30, 2014	474,243		$	20.46
	For the nine months ended September 30, 2014 and 2013, we granted awards under the LTIP with a grant date fair value of $15.4 million and $2.4 million, respectively, which we have classified as equity awards. As of September 30, 2014 and September 30, 2013, we had total unamortized compensation expense of $9.7 million and $4.1 million, respectively, related to these awards. The awards were expected to be amortized over a three-year vesting period from each equity awards’ grant date. The Holdings Transaction on August 4, 2014 resulted in a change of control of our General Partner and accelerated the vesting of all the LTIP awards and distribution equivalent rights outstanding on that date. As of September 30, 2014 and September 30, 2013, we had 909,934 and 1,508,421 units, respectively, available for issuance under the LTIP.
	Unit Based Compensation Expense
	The following table summarizes information regarding recognized compensation expense, which is included in general and administrative expense on our statements of operations (in thousands):
		Three Months Ended September 30,					Nine Months Ended September 30,
		2014			2013		2014			2013
	Unit-based compensation	$	9,227	(1)	$	552	$	10,837	(1)	$	1,645
	(1) This amount includes $7.1 million related to the accelerated vesting of the LTIP awards and $1.5 million related to the vesting of the Southcross Energy LLC equity equivalent units as a result of the change in control that took place on August 4, 2014.
	Southcross Energy LLC Equity Equivalent Units
	In conjunction with the closing of the TexStar Rich Gas System Transaction, 15,000 outstanding Southcross Energy LLC equity equivalent units subject to change of control provisions vested on August 4, 2014. The Partnership recognized $1.5 million in general and administrative expenses in the statements of operations for the three and nine months ended September 30, 2014 in connection with the accelerated vesting of these equity equivalent units.
	Employee Savings Plan
	We have employee savings plans under Sections 401(a) and 401(k) of the Internal Revenue Code of 1986, as amended, whereby employees of our General Partner may contribute a portion of their base compensation to the employee savings plans, subject to limits. We provide a matching contribution each payroll period equal to 100% of the employees’ contributions up to the lesser of 6% of each employee’s pay or $17,500 annually for the period. The following table summarizes information regarding contributions and the expense recognized for the matching contributions, which is included in general and administrative expense on our statements of operations (in thousands):
		Three Months Ended September 30,					Nine Months Ended September 30,
		2014			2013		2014			2013
	Matching contributions expensed for employee savings plan	$	271		$	166	$	861		$	476
	2014 Incentive Plan
	On August 4, 2014, our General Partner and Southcross GP Management Holdings, LLC, a newly formed entity of which Holdings is the sole managing member (“GP Management”), adopted the Southcross Energy Partners GP, LLC and Southcross GP Management Holdings, LLC 2014 Equity Incentive Plan (the “2014 Incentive Plan”). Under the 2014 Incentive Plan, employees, consultants and directors of our General Partner and GP Management will be eligible to receive incentive compensation awards.
	The 2014 Incentive Plan generally provides for the grant of awards, from time to time at the discretion of the board of directors of our General Partner (and, as applicable, the board of directors of the general partner of Holdings), of non-voting units in our General Partner to GP Management and then a corresponding grant or award of non-voting units of GP Management to the employee, consultant or director.
	In connection with the adoption of the 2014 Incentive Plan, our General Partner amended and restated its limited liability company agreement and entered into its Second Amended and Restated Limited Liability Company Agreement which establishes a new class of non-voting units for issuance pursuant to the 2014 Incentive Plan and designates Holdings as our General Partner’s managing member. As of September 30, 2014, no awards had been granted under this plan.

REVENUES

REVENUES	9 Months Ended
	Sep. 30, 2014
Revenues [Abstract]	'
REVENUES	'
	REVENUES
	We had revenues consisting of the following categories (in thousands):
		Three Months Ended September 30,				Nine Months Ended September 30,
		2014		2013		2014		2013
	Sales of natural gas	$	123,874	$	99,483	$	392,633	$	304,343
	Sales of NGLs and condensate	65,046		45,916		171,201		112,128
	Transportation, gathering and processing fees	22,466		15,124		55,860		42,644
	Other	107		106		453		468
	Total revenues	$	211,493	$	160,629	$	620,147	$	459,583

CONCENTRATION_OF_CREDIT_RISK_A

CONCENTRATION OF CREDIT RISK AND TRADE ACCOUNTS RECEIVABLE	9 Months Ended
	Sep. 30, 2014
Risks and Uncertainties [Abstract]	'
CONCENTRATION OF CREDIT RISK AND TRADE ACCOUNTS RECEIVABLE	'
	CONCENTRATION OF CREDIT RISK AND TRADE ACCOUNTS RECEIVABLE
	Our primary markets are in South Texas, Alabama and Mississippi. We have a concentration of revenues and trade accounts receivable due from customers engaged in the production, trading, distribution and marketing of natural gas and NGL products. These concentrations of customers may affect overall credit risk in that these customers may be affected similarly by changes in economic, regulatory or other factors. We analyze our customers’ historical financial and operational information before extending credit.
	Our top ten customers for the three and nine months ended September 30, 2014 and 2013 represent the following percentages of consolidated revenue:
		Three Months Ended September 30,				Nine Months Ended September 30,
		2014		2013		2014		2013
	Top ten customers	66.9	%	69.1	%	67.1	%	58.8	%
	The percentage of total consolidated revenue for each customer that exceeded 10% of total revenues for the three and nine months ended September 30, 2014 and 2013 was as follows:
		Three Months Ended September 30,				Nine Months Ended September 30,
		2014		2013		2014		2013
	Trafigura AG	15.7	%	13.1	%	13.6	%	N/A(1)
	Sherwin Alumina Company	N/A(1)		12	%	10.6	%	12.3	%
	(1) Information is not provided for periods for which the customer or producer was less than 10% of our consolidated revenue.
	For the nine months ended September 30, 2014 and 2013, we did not experience significant non-payment for services. At September 30, 2014 and December 31, 2013, we did not record an allowance for uncollectible accounts receivable.

SUBSEQUENT_EVENTS

SUBSEQUENT EVENTS	9 Months Ended
	Sep. 30, 2014
Subsequent Events [Abstract]	'
SUBSEQUENT EVENTS	'
	SUBSEQUENT EVENTS
	Partnership Distributions
	On October 22, 2014, the board of directors of our General Partner declared a cash distribution of $0.40 per common unit and General Partner unit, which will be paid on November 14, 2014 to unitholders of record on November 5, 2014. In addition, on October 22, 2014, the board of directors of our General Partner declared a $0.3257 per unit distribution for the third quarter of 2014 on the Partnership’s Class B Convertible Units. The distribution on the Class B Convertible Units will be paid in the form of additional Class B Convertible Units on November 14, 2014. In order to support the Partnership's recent acquisition of the TexStar Rich Gas System in August 2014, Holdings has elected to forgo distributions on any subordinated units that would cause the Partnership's distributions to exceed its distributable cash flow for any quarterly period. This election will continue until the Partnership has distributable cash flow in excess of total distributions on the Partnership's common and subordinated units. As a result of this election, Holdings will not receive distributions for the third quarter of 2014 on any of its subordinated units.

SUPPLEMENTAL_INFORMATION

SUPPLEMENTAL INFORMATION	9 Months Ended
	Sep. 30, 2014
Supplemental Cash Flow Elements [Abstract]	'
SUPPLEMENTAL INFORMATION	'
	SUPPLEMENTAL INFORMATION
	Supplemental Cash Flow Information (in thousands)
		Nine Months Ended September 30,
		2014			2013
	Supplemental Disclosures:
	Cash paid for interest, net of amounts capitalized	$	8,628		$	8,880
	Cash received for tax refunds	205			95
	Supplemental disclosures of non-cash investing and financing activities:
	Accounts payable related to capital expenditures	23,144			34,238
	Change in value recognized in other comprehensive income	11			112
	Capital lease obligations	577			1,399
	Accrued distribution equivalent rights on LTIP units	562			191
	Series A Convertible preferred unit in-kind distributions and fair value adjustments	5,130			1,255
	Class B Convertible unit issuance, net	324,413			—
	Consideration paid in excess of purchase price for the TexStar Rich Gas System	99,625			—
	Capitalization of Interest Cost
	We capitalize interest on projects during their construction period. Once a project is placed in service, capitalized interest, as a component of the total cost of the construction, is depreciated over the estimated useful life of the asset constructed. We incurred the following interest costs (in thousands):
		Three Months Ended September 30,						Nine Months Ended September 30,
		2014			2013			2014			2013
	Total interest costs	$	5,529		$	3,887		$	10,826		$	10,035
	Capitalized interest included in property, plant and equipment, net	(933		)	(300		)	(1,486		)	(1,300		)
	Interest expense	$	4,596		$	3,587		$	9,340		$	8,735
	Deferred Financing Costs
	Deferred financing costs are capitalized and amortized as interest expense under the effective interest method over the term of the related debt. The unamortized balance of deferred financing costs is included in other assets on the balance sheets. Changes in deferred financing costs are as follows (in thousands):
		2014
	Deferred financing costs, January 1	$	5,237
	Capitalization of deferred financing costs (1)	17,716
	Less:
	Amortization of deferred financing costs (2)	(3,596		)
	Deferred financing costs, September 30	$	19,357
	(1) See Note 7.
	(2) This amount includes $2.3 million written off in connection with exiting the Previous Credit Facility and entering into the Senior Credit Facilities in August 2014.
	Southcross Assets Considered Leases to Third Parties
	In connection with the Onyx acquisition in March 2014, we acquired natural gas pipelines and contracts related to the acquired pipelines (see Note 2). The pipelines transport natural gas to two power plants in Nueces County, Texas under fixed-fee contracts. The contracts have a primary term through 2029 and an option to extend the agreements by an additional term of up to ten years. These contracts are considered operating leases under the applicable accounting guidance.
	Future minimum annual demand payment receipts under these agreements as of September 30, 2014 were as follows: $1.1 million for the remainder of 2014; $5.6 million in 2015; $5.6 million in 2016; $5.6 million in 2017; $2.2 million in 2018; $2.2 million in 2019; and $15.3 million thereafter. The revenue recognized for the demand payments is recognized on a straight-line basis over the term of the contract. The demand fee revenues under the contracts were $0.7 million and $1.5 million for the three and nine months ended September 30, 2014, respectively, and have been included within transportation, gathering and processing fees within Note 13. These amounts do not include variable fees based on the actual gas volumes delivered under the contracts. Variable fees recognized in revenues within transportation, gathering and processing fees within Note 13 were $0.2 million and $0.6 million for the three and nine months ended September 30, 2014, respectively.

EQUITY_IN_JOINT_VENTURES

EQUITY IN JOINT VENTURES	9 Months Ended
	Sep. 30, 2014
Equity Method Investments and Joint Ventures [Abstract]	'
EQUITY IN JOINT VENTURES	'
	INVESTMENTS IN JOINT VENTURES
	Assets acquired through the TexStar Rich Gas System Transaction include equity interests in three joint ventures. During 2012, TexStar and a company subsequently acquired by Atlas Pipeline Partners, L.P. formed T2 Eagle Ford Gathering Company LLC (“T2 Eagle Ford”), T2 LaSalle Gathering Company LLC (“T2 LaSalle”) and T2 EF Cogeneration Holdings LLC (“T2 Cogen”) to construct and operate a pipeline and cogeneration facility located in South Texas. The Partnership indirectly has a 50% interest in T2 Eagle Ford, a 50% interest in T2 Cogen and a 25% interest in T2 LaSalle. The joint ventures’ summarized financial data from their statements of operations since we obtained our equity interests in the joint ventures on August 4, 2014 is as follows (in thousands):
		Three and Nine Months Ended September 30, 2014
		T2 Eagle Ford			T2 Cogen			T2 LaSalle
	Revenue	$	516		$	410		$	229
	Net loss	(3,234		)	(2,871		)	(1,021		)
	The Partnership’s equity in losses of joint venture investments is comprised of the following for the three and nine months ended September 30, 2014 (in thousands):
		Three and Nine Months Ended
		30-Sep-14
	T2 Eagle Ford	$	(1,618	)
	T2 Cogen	(1,435		)
	T2 LaSalle	(255		)
	Equity in losses of joint venture investments	$	(3,308	)
	The Partnership’s investments in joint ventures is comprised of the following as of September 30, 2014 (in thousands):
		30-Sep-14
	T2 Eagle Ford	$	110,152
	T2 Cogen	18,994
	T2 LaSalle	19,702
	Investments in joint ventures	$	148,848

BASIS_OF_PRESENTATION_AND_SUMM1

BASIS OF PRESENTATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies)	9 Months Ended
	Sep. 30, 2014
Accounting Policies [Abstract]	'
Basis of Presentation	'
	Basis of Presentation
	We prepared this report under the rules and regulations of the Securities and Exchange Commission and in accordance with accounting principles generally accepted in the United States of America (“GAAP”) for interim financial statements. Accordingly, these condensed consolidated financial statements do not include all of the disclosures required by GAAP and should be read with our 2013 Annual Report on Form 10-K. The condensed consolidated financial statements as of September 30, 2014 and December 31, 2013, and for the three and nine months ended September 30, 2014 and 2013, are unaudited and have been prepared on the same basis as the audited financial statements included in our 2013 Annual Report on Form 10-K. Adjustments (consisting of normal recurring adjustments) necessary for a fair presentation of the results of operations and financial position have been included herein. All intercompany accounts and transactions have been eliminated in the preparation of the accompanying condensed consolidated financial statements.
	The condensed consolidated financial statements reflect the assets acquired and liabilities assumed and the related operating results beginning on March 6, 2014 associated with the Onyx pipelines acquisition discussed further in Note 2. The condensed consolidated financial statements also reflect the TexStar Rich Gas System Transaction and the related operating results beginning on August 4, 2014.
	As a result of the Holdings Transaction, Holdings acquired a controlling equity interest in the Partnership which is being accounted for under the acquisition method of accounting in the consolidated financial statements of Holdings, whereby Holdings recorded the Partnership’s assets acquired and liabilities assumed at fair value. However, because less than 80% of the equity interests in the Partnership were acquired, push down accounting of Holdings’ basis in the Partnership was prohibited in our consolidated financial statements.
	Additionally, because the TexStar Rich Gas System was owned by TexStar, the Partnership recorded the TexStar Rich Gas System at TexStar’s historical cost. Thus, the difference between consideration paid and the TexStar Rich Gas System’s historical cost (net book value) at August 4, 2014 was recorded as a reduction to partners’ capital. Management concluded that the Partnership was the predecessor for accounting purposes for periods prior to August 4, 2014, the date on which the Holdings Transaction and the TexStar Rich Gas System Transaction closed.
	The accompanying unaudited condensed consolidated financial statements were prepared in conformity with GAAP, which requires management to make various estimates and assumptions that may affect the amounts of assets and liabilities, disclosures of contingent assets and liabilities at the date of the condensed consolidated financial statements and the reported amounts of revenues and expenses during the period. Actual results may differ from those estimates. Information for interim periods may not be indicative of our operating results for the entire year.
	The disclosures included in this report provide an update to our 2013 Annual Report on Form 10-K.
	We evaluate events that occur after the balance sheet date, but before the financial statements are issued, for potential recognition or disclosure. Based on the evaluation, we determined that there were no material subsequent events for recognition or disclosure other than those disclosed in this report.
Recent Accounting Pronouncements	'
	Recent Accounting Pronouncements
	Accounting standard-setting organizations frequently issue new or revised accounting rules. We review new pronouncements to determine their impact, if any, on our consolidated financial statements.

ACQUISITION_Tables

ACQUISITION (Tables)	9 Months Ended
	Sep. 30, 2014
Business Combinations [Abstract]	'
Reconciliation of Fair Value of Assets Acquired and Liabilities Assumed	'
	The fair value of the assets acquired and liabilities assumed related to the Onyx purchase price was as follows (in thousands):
	Purchase Price—Cash	$	38,636
	Current assets	$	730
	Property, plant and equipment	39,413
	Total assets acquired	40,143
	Current liabilities assumed	(1,407		)
	Other liabilities assumed	(100		)
	Net identifiable assets acquired	$	38,636
Schedule of Unaudited, Pro Forma Financial Information	'
	The following unaudited pro forma financial information for the three and nine months ended September 30, 2013 and the nine months ended September 30, 2014 assumes that the acquisition of pipelines from Onyx occurred on January 1, 2013 and includes adjustments for income from operations, including depreciation and amortization, as well as the effects of financing the transaction (in thousands, except unit information):
		Three Months Ended			Nine Months Ended September 30,
		30-Sep-13			2014			2013
	Total revenue	$	161,777		$	620,796		$	462,818
	Net loss	(4,547		)	(29,104		)	(18,533		)
	Net income (loss) attributable to common unitholders	2,067			(19,132		)	(9,794		)
	Net income (loss) per common unit	0.14			(0.91		)	(0.67		)
	Diluted income (loss) per common unit	0.13			(0.91		)	(0.67		)
	Net loss attributable to subordinated unitholders	(2,553		)	(7,823		)	(9,624		)
	Net loss per subordinated unit—(basic and diluted)	(0.21		)	(0.64		)	(0.79		)

NET_LOSS_INCOME_PER_LIMITED_PA1

NET (LOSS) INCOME PER LIMITED PARTNER UNIT AND DISTRIBUTIONS (Tables)	9 Months Ended
	Sep. 30, 2014
Net loss per limited partner unit and distributions	'
Schedule of Distributions Earned and Declared	'
	The following table represents the PIK distribution earned on the Class B Convertible Units for periods after August 4, 2014 and ended September 30, 2014 (in thousands, except per unit and in-kind distribution units):
	Payment Date	Attributable to the Quarter Ended		Per Unit Distribution					In-Kind Class B Convertible Unit			In-Kind				In-Kind		In-Kind General Partner Distribution Value(1)
									Distributions to Class B Convertible Holders			Class B Convertible Distributions				Unit
												Value(1)				Distribution
																to General
																Partner
	November 14, 2014	September 30, 2014		$	0.3257				256,078			$	5,467			5,226		$	112
	(1) The fair value was calculated as required, based on the common unit price at the quarter end date for the period attributable to the distribution, multiplied by the number of units distributed.
	Cash Distributions
	The following table represents our distributions declared for the quarterly periods from the date of our initial public offering (in thousands, except per unit data):
								Distributions
		Attributable to the		Per Unit				Limited Partners
	Payment Date	Quarter Ended		Distribution				Common				Subordinated				General Partner			Total
	2014
	November 14, 2014	September 30, 2014		$	0.4		(1)	$	9,520			$	—			$	413		$	9,933
	August 14, 2014	June 30, 2014		0.4			(1)	9,399				4,886				290			14,575
	15-May-14	March 31, 2014		0.4				8,586				4,886				290			13,762
	2013
	February 14, 2014	December 31, 2013		0.4				8,581				4,885				289			13,755
	November 14, 2013	September 30, 2013		0.4				4,888				4,885				214			9,987
	August 14, 2013	June 30, 2013		0.4				4,890				4,886				210			9,986
	15-May-13	March 31, 2013		0.4				4,888				4,886				199			9,973
	2012
	February 14, 2013	December 31, 2012		0.24			(2)	2,931				2,931				120			5,982
	(1) The common unit distribution in the table above includes the distribution payment to the Series A Preferred unitholders for their Series A Preferred Units converted into common units or to the units that vested as part of our LTIP (as defined in Note 12) as a result of the Holdings Transaction (see Notes 1, 9 and 12).
	(2) Per unit distribution of $0.24 corresponds to the minimum quarterly distribution of $0.40 per unit, or $1.60 on an annualized basis, pro-rated for the portion of the quarter following the closing of our initial public offering on November 7, 2012.
Schedule of Reconciliation of Net Income loss	'
	The following is a reconciliation of the net loss attributable to our limited partners and our limited partner units and the basic and diluted earnings per unit calculations for the three and nine months ended September 30, 2014 and 2013 (in thousands, except unit and per unit data):
		Three Months Ended September 30,								Nine Months Ended September 30,
		2014				2013				2014				2013
	Net loss	$	(24,778	)		$	(4,069	)		$	(29,026	)		$	(16,645	)
	Series A Preferred Unit fair value adjustment (1)	424				4,667				(4,596		)		—
	Series A Preferred Unit in-kind distribution	$	—			$	(696	)		$	(534	)		$	(1,255	)
	General partner Unit in-kind distribution	$	(112	)		$	—			$	(123	)		$	—
	Net loss attributable to partners	$	(24,466	)		$	(98	)		$	(34,279	)		$	(17,900	)
	General partner's interest (2)	$	(523	)		$	(81	)		$	(622	)		$	(334	)
	Class B Convertible interest (2)	(6,778		)		—				(6,778		)		—
	Limited partners' interest (2)
	Common	$	(11,156	)		$	2,323			$	(19,084	)		$	(8,784	)
	Subordinated	$	(6,009	)		$	(2,340	)		$	(7,795	)		$	(8,782	)
	(1) The valuation adjustment to maximum redemption value of the Series A Preferred Unit in-kind distribution decreased the net loss attributable to partners for the three months ended September 30, 2014 and 2013 and increased the net loss attributable to partners for the nine months ended September 30, 2014 in the calculation of earnings per unit (see Note 9).
	(2) General Partner's and limited partners’ interests are calculated based on the allocation of net losses for the period, net of the allocation of Series A Preferred Unit in-kind distributions, Series A Preferred Unit fair value adjustments and General Partner unit in-kind distributions. Class B Convertible interest is calculated based on the allocation of only net losses for the period.
		Three Months Ended September 30,								Nine Months Ended September 30,
	Common Units	2014				2013				2014				2013
	Interest in net income (loss)	$	(11,156	)		$	2,323			$	(19,084	)		$	(8,784	)
	Effect of dilutive units - numerator (1)	—				(4,326		)		—				—
	Dilutive interest in net loss	$	(11,156	)		$	(2,003	)		$	(19,084	)		$	(8,784	)
	Weighted-average units - basic	22,925,979				12,222,692				20,911,472				12,219,699
	Effect of dilutive units - denominator (2)	—				1,767,445				—				—
	Weighted-average units - dilutive	22,925,979				13,990,137				20,911,472				12,219,699
	Basic net income (loss) per common unit	$	(0.49	)		$	0.19			$	(0.91	)		$	(0.72	)
	Diluted net loss per common unit	$	(0.49	)		$	(0.14	)		$	(0.91	)		$	(0.72	)
		Three Months Ended September 30,								Nine Months Ended September 30,
	Subordinated Units	2014				2013				2014				2013
	Interest in net loss	$	(6,009	)		$	(2,340	)		$	(7,795	)		$	(8,782	)
	Effect of dilutive units - numerator(1)	—				—				—				—
	Dilutive interest in net loss	$	(6,009	)		$	(2,340	)		$	(7,795	)		$	(8,782	)
	Weighted-average units - basic	12,213,713				12,213,713				12,213,713				12,213,713
	Effect of dilutive units - denominator(1)	—				—				—				—
	Weighted-average units - dilutive	12,213,713				12,213,713				12,213,713				12,213,713
	Basic and diluted net loss per subordinated unit	$	(0.49	)		$	(0.19	)		$	(0.64	)		$	(0.72	)
	(1) Because we had a net loss for the three and nine months ended September 30, 2014 and nine months ended September 30, 2013 for the common units, and for the three and nine months ended September 30, 2014 and the three and nine months ended September 30, 2013 for the subordinated units, the effect of the dilutive units would be anti-dilutive to the per unit calculation. Therefore, the weighted average units outstanding are the same for basic and dilutive net loss per unit for those periods. The weighted average units that would be included in the computation of diluted per unit amounts in accordance with the treasury stock method were 32,757,204 and 25,447,215 for the three and nine months ended September 30, 2014, respectively.
	(2) The weighted average units included in the computation of diluted per unit amounts were 27,972 unvested awards granted under our long-term incentive plan and 1,739,473 Series A Preferred Units for the three months ended September 30, 2013. The weighted average units that were not included in the computation of diluted per unit amounts were 20,221 unvested awards granted under our long-term incentive plan and 1,052,329 Series A Preferred Units for the nine months ended September 30, 2013. Diluted net income per limited partner unit reflects the potential dilution that could occur if securities or agreements to issue common units, such as awards under the LTIP (as defined in Note 12), were exercised, settled or converted into common units. When it is determined that potential common units resulting from an award should be included in the diluted net income per limited partner unit calculation, the impact is reflected by applying the treasury stock method.
Preferred units issued	'
Net loss per limited partner unit and distributions	'
Schedule of Distributions Earned and Declared	'
	The following table represents the paid in-kind (“PIK”) distribution from the date of our initial public offering through August 4, 2014, the date on which all outstanding Series A Preferred Units were converted to common units (in thousands, except per unit and in-kind distribution units):
	Payment Date	Attributable to the Quarter Ended(1)		Per Unit Distribution					In-Kind Series A			In-Kind				In-Kind		In-Kind General Partner Distribution Value(2)
									Preferred Unit			Series A				Unit
									Distributions to Series A Preferred Holders			Preferred				Distribution
												Distributions				to General
												Value(2)				Partner
	2014
	May 15, 2014	March 31, 2014		$	0.4				31,513			$	534			643		$	11
	2013
	February 14, 2014	December 31, 2013		0.4					30,971			558				632		11
	November 14, 2013	September 30, 2013		0.4					30,439			511				621		10
	August 14, 2013	June 30, 2013		0.35			(3)		22,276			512				454		10
	14-Aug-13	30-Jun-13		0.2			(4)		2,199			51				45		1
	(1) As a result of the conversion, the Series A Preferred Unit holders (and the corresponding General Partner units) did not receive a PIK distribution for the quarters ended June 30, 2014 or September 30, 2014, but received a cash distribution on the converted common units.
	(2) The fair value was calculated as required, based on the common unit price at the quarter end date for the period attributable to the distribution, multiplied by the number of units distributed.
	(3) Per unit distribution of $0.35 corresponds to the minimum quarterly distribution of $0.40 per unit, or $1.60 on an annualized basis, pro-rated for the portion of the quarter following the issuance of 1,466,325 Series A Preferred Units and 29,925 General partner units on April 12, 2013.
	(4) Per unit distribution of $0.20 corresponds to the minimum quarterly distribution of $0.40 per unit, or $1.60 on an annualized basis, pro-rated for the portion of the quarter following the issuance of 248,675 Series A Preferred Units and 5,075 General partner units on May 15, 2013.

FINANCIAL_INSTRUMENTS_Tables

FINANCIAL INSTRUMENTS (Tables)	9 Months Ended
	Sep. 30, 2014
Derivatives	'
Schedule of Interest Rate Derivatives [Table Text Block]	'
	We have elected to present our interest rate swaps net on the balance sheets. There was no effect of offsetting on the balance sheets as of September 30, 2014 or December 31, 2013. Our interest rate swap position was as follows (in thousands):
												Estimated Fair Value
	Notional Amount				Fixed Rate			Effective Date		Maturity Date		September 30, 2014
	$	140,000			0.327	%		June 30, 2014		June 30, 2015		$	(140	)
	50,000				1.198	%		September 30, 2014		June 30, 2016		(31		)
	50,000				1.196	%		September 30, 2014		June 30, 2016		(30		)
												$	(201	)
Schedule of the fair value of the interest rate swap liabilities	'
	The fair values of our interest rate swap liabilities were as follows (in thousands):
		Significant Other Observable Inputs (Level 2)
		Fair Value Measurement as of
		30-Sep-14				31-Dec-13
	Current interest rate swap liabilities	$	175			$	263
	Non-current interest rate swap liabilities	26				—
	Total interest rate swap liabilities	$	201			$	263
Summary of amounts recognized in interest expense associated with derivatives that are not designated as hedging instruments	'
	The realized and unrealized amounts recognized in interest expense associated with derivatives that are not designated as hedging instruments were as follows (in thousands):
		Three Months Ended September 30,								Nine Months Ended September 30,
		2014				2013				2014				2013
	Realized loss on interest rate swap derivatives	$	(74	)		$	(27	)		$	(127	)		$	(81	)
	Unrealized loss on interest rate swap derivatives	(21		)		—				(201		)		—
Interest rate cap contract	'
Derivatives	'
Summary of effect of cash flow hedge in statements of changes in partners' capital and members' equity and comprehensive income/(loss)	'
	The effect of the interest rate swap designated as a cash flow hedge in our statements of changes in partners’ capital and comprehensive loss was as follows (in thousands):
		Three Months Ended September 30,								Nine Months Ended September 30,
		2014				2013				2014				2013
	Change in value recognized in other comprehensive loss - effective portion	$	—			$	(82	)		$	(11	)		$	(112	)
	Loss reclassified from accumulated other comprehensive loss to interest expense	—				108				221				302
Commodity Swaps	'
Derivatives	'
Schedule of amounts recognized in the statement of operations	'
	The effect of offsetting on the balance sheets were as follows (in thousands):
			30-Sep-14								31-Dec-13
			Other Current Assets				Other Current Liabilities				Other Current Assets				Other Current Liabilities
	Gross amounts of recognized assets (liabilities)		$	—			$	(218	)		$	140			$	(20	)
	Gross amounts offset on the balance sheets		—				—				(20		)		20
	Net amount		$	—			$	(218	)		$	120			$	—
	The realized and unrealized gain/loss on these derivatives, recognized in revenues in our statements of operations, were as follows (in thousands):
		Three Months Ended September 30,								Nine Months Ended September 30,
		2014				2013				2014				2013
	Realized gain (loss) on commodity swap derivatives	$	213			$	(93	)		$	(875	)		$	(149	)
	Unrealized loss on commodity swap derivatives	(207		)		—				(338		)		—

LONGLIVED_ASSETS_Tables

LONG-LIVED ASSETS (Tables)	9 Months Ended
	Sep. 30, 2014
Property, Plant and Equipment [Abstract]	'
Schedule of property, plant and equipment	'
	Property, plant and equipment consisted of the following (in thousands):
		Estimated	30-Sep-14			31-Dec-13
		Useful Life (yrs)
	Pipelines	30	$	393,131		$	344,721
	Gas processing, treating and other plants	15	481,939			254,133
	Compressors	7	37,936			20,030
	Rights of way and easements	15	26,338			20,729
	Furniture, fixtures and equipment	5	3,610			3,347
	Capital lease vehicles	5-Mar	1,946			1,396
	Total property, plant and equipment		944,900			644,356
	Accumulated depreciation and amortization		(118,565		)	(79,908		)
	Total		826,335			564,448
	Construction in progress		96,090			6,039
	Land and other		25,503			5,308
	Property, plant and equipment, net		$	947,928		$	575,795

LONGTERM_DEBT_Tables

LONG-TERM DEBT (Tables)	9 Months Ended
	Sep. 30, 2014
Debt Disclosure [Abstract]	'
Schedule of Long-term Debt	'
	Third A&R Revolving Credit Agreement
	The Third A&R Revolving Credit Agreement is a five-year $200 million revolving credit facility (the “Credit Facility”). Borrowings under our Credit Facility bear interest at the London Interbank Offered Rate (“LIBOR”) plus an applicable margin or a base rate as defined in the respective credit agreement. Pursuant to the Third A&R Revolving Credit Agreement, among other things:
	(a)	the letters of credit sublimit increased to $75 million;
	(b)	we have the right to increase the total commitments under the Credit Facility by obtaining additional commitments from other lenders, as long as our senior secured leverage ratio is less than or equal to 4.50 to 1.00 before and after giving effect to such increase, subject to certain other conditions;
	(c)	the definition of “Change of Control” is amended to permit the combination transaction with TexStar and to reflect the Sponsors’ control of the General Partner;
	(d)	our maximum consolidated total leverage ratio is set at (i) 5.75 to 1.00 as of the last day of the fiscal quarter ending each of September 30, 2014 and December 31, 2014, (ii) 5.50 to 1.00 as of the last day of the fiscal quarter ending March 31, 2015, (iii) 5.25 to 1.00 as of the last day of the fiscal quarter ending June 30, 2015 and (iv) 5.00 to 1.00 as of the last day of each fiscal quarter thereafter, in each case, without any step-ups in connection with acquisitions;
	(e)	we have the right, exercisable on or before the date that our annual audited financial statements are due for the 2014 fiscal year, to comply with the consolidated total leverage ratio, consolidated senior secured leverage ratio and the consolidated interest coverage ratio covenants (the “Financial Covenants”) by applying certain specified quarterly base periods pertaining to the TexStar Rich Gas System;
	(f)	if we fail to comply with the Financial Covenants (a “Financial Covenant Default”), we have the right (which cannot be exercised more than two times in any 12-month period or more than four times during the term of the facility) to cure such Financial Covenant Default by having the Sponsors purchase equity interests in or make capital contributions to us resulting in, among other things, proceeds that, if added to consolidated EBITDA, as defined in the Third A&R Revolving Credit Agreement, would result in us satisfying the Financial Covenants;
	(g)	certain definitions are amended to take into account the TexStar Rich Gas System; and
	(h)	the negative covenants are amended to permit the entry into, and indebtedness under, the Term Loan Agreement.
	Term Loan Agreement
	The Term Loan Agreement is a seven-year $450 million senior secured term loan facility. On August 4, 2014, the lenders funded the full amount of the facility. Borrowings under our Term Loan Agreement bear interest at LIBOR plus 4.25% or a base rate as defined in the respective credit agreement with a LIBOR floor of 1.00%. Under the Term Loan Agreement, among other things:
	(a)	subject to certain requirements, including the absence of a default and pro forma compliance under the Third A&R Revolving Credit Agreement and pro forma compliance with a senior secured leverage ratio less than or equal to 4.50 to 1.00 before and after giving effect to such increase, we may from time to time request incremental term loan commitments subject to certain other conditions;
	(b)	we may seek commitments from third party lenders in connection with any incremental term loan commitment requests, subject to certain consent rights given to the administrative agent;
	(c)	the guarantors and the collateral are the same as provided for the benefits of lenders in the Third A&R Revolving Credit Agreement;
	(d)	subject to certain conditions, we may request that the lenders extend the seven-year maturity of all or a portion of the outstanding loans under the facility;
	(e)	the facility will amortize in equal quarterly installments in an aggregate annual amount equal to 1% of the original principal amount of the initial loan ($1.125 million), with the remainder due on the maturity date;
	(f)	there are customary mandatory prepayment provisions and, subject to certain conditions, permissive prepayment provisions; provided, that if certain repricing transactions occur, we must pay a call premium equal to 1% of the principal amount of the loans subject to the repricing transactions; and
	(g)	there are customary representations and warranties, affirmative covenants, negative covenants and provisions governing an event of default (including acceleration of payment in connection with material indebtedness, including the Third A&R Revolving Credit Agreement).

COMMITMENTS_AND_CONTINGENCIES_

COMMITMENTS AND CONTINGENCIES (Tables)	9 Months Ended
	Sep. 30, 2014
Commitments and Contingencies Disclosure [Abstract]	'
Schedule of Capital Lease Obligations	'
	The capital lease obligation amounts included on the balance sheets were as follows (in thousands):
		September 30, 2014		December 31, 2013
	Other current liabilities	$	484	$	481
	Other non-current liabilities	569		427
	Total	$	1,053	$	908

TRANSACTIONS_WITH_RELATED_PART1

TRANSACTIONS WITH RELATED PARTIES (Tables)	9 Months Ended
	Sep. 30, 2014
Related Party Transactions [Abstract]	'
Schedule of Fees, Expenses and Reimbursements Incurred Through Services with Related Parties	'
	We incurred expenses related to these reimbursements as follows (in thousands):
		Three Months Ended September 30,				Nine Months Ended September 30,
		2014		2013		2014		2013
	Reimbursements included in general and administrative expenses	$	3,076	$	2,624	$	9,057	$	7,564
	Reimbursements included in operations and maintenance expenses	4,562		3,596		12,175		9,904
	Total reimbursements to our General Partner and its affiliates	$	7,638	$	6,220	$	21,232	$	17,468
	We incurred fees and expenses related to the services from our affiliated directors as follows (in thousands):
		Three Months Ended September 30,				Nine Months Ended September 30,
		2014		2013		2014		2013
	Charlesbank	$	80	$	51	$	270	$	387
	EIG	8		—		8		—
	Tailwater	8		—		8		—
	Total fees and expenses paid for director services to affiliated entities	$	96	$	51	$	286	$	387

INCENTIVE_COMPENSATION_Tables

INCENTIVE COMPENSATION (Tables)	9 Months Ended
	Sep. 30, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]	'
Summary of information regarding awards of units granted under the Incentive Plan	'
	The following table summarizes information regarding awards of units granted under the LTIP:
		Units		Weighted-Average Fair
				Value at Grant Date
	Unvested - December 31, 2013	182,673		$	22.55
	Granted units	776,821		19.82
	Forfeited units	(200	)	23.01
	Units recaptured for tax withholdings	(159,500	)	17.06
	Vested units	(325,551	)	17.45
	Unvested - September 30, 2014	474,243		$	20.46
Summary of information regarding recognized compensation expense, which is included in general and administrative expense on consolidated statements of operations	'
	The following table summarizes information regarding recognized compensation expense, which is included in general and administrative expense on our statements of operations (in thousands):
		Three Months Ended September 30,					Nine Months Ended September 30,
		2014			2013		2014			2013
	Unit-based compensation	$	9,227	(1)	$	552	$	10,837	(1)	$	1,645
Schedule of employer matching contributions	'
	The following table summarizes information regarding contributions and the expense recognized for the matching contributions, which is included in general and administrative expense on our statements of operations (in thousands):
		Three Months Ended September 30,					Nine Months Ended September 30,
		2014			2013		2014			2013
	Matching contributions expensed for employee savings plan	$	271		$	166	$	861		$	476

REVENUES_Tables

REVENUES (Tables)	9 Months Ended
	Sep. 30, 2014
Revenues [Abstract]	'
Schedule of revenues by category	'
	We had revenues consisting of the following categories (in thousands):
		Three Months Ended September 30,				Nine Months Ended September 30,
		2014		2013		2014		2013
	Sales of natural gas	$	123,874	$	99,483	$	392,633	$	304,343
	Sales of NGLs and condensate	65,046		45,916		171,201		112,128
	Transportation, gathering and processing fees	22,466		15,124		55,860		42,644
	Other	107		106		453		468
	Total revenues	$	211,493	$	160,629	$	620,147	$	459,583

CONCENTRATION_OF_CREDIT_RISK_A1

CONCENTRATION OF CREDIT RISK AND TRADE ACCOUNTS RECEIVABLE (Tables)	9 Months Ended
	Sep. 30, 2014
Consolidated revenue concentration	'
Schedule of consolidated revenue attributed to Formosa and Sherwin	'
	The percentage of total consolidated revenue for each customer that exceeded 10% of total revenues for the three and nine months ended September 30, 2014 and 2013 was as follows:
		Three Months Ended September 30,				Nine Months Ended September 30,
		2014		2013		2014		2013
	Trafigura AG	15.7	%	13.1	%	13.6	%	N/A(1)
	Sherwin Alumina Company	N/A(1)		12	%	10.6	%	12.3	%
	(1) Information is not provided for periods for which the customer or producer was less than 10% of our consolidated revenue.
Top ten customers	'
Consolidated revenue concentration	'
Schedule of consolidated revenue attributed to Formosa and Sherwin	'
	Our top ten customers for the three and nine months ended September 30, 2014 and 2013 represent the following percentages of consolidated revenue:
		Three Months Ended September 30,				Nine Months Ended September 30,
		2014		2013		2014		2013
	Top ten customers	66.9	%	69.1	%	67.1	%	58.8	%

SUPPLEMENTAL_INFORMATION_Table

SUPPLEMENTAL INFORMATION (Tables)	9 Months Ended
	Sep. 30, 2014
Supplemental Cash Flow Elements [Abstract]	'
Supplemental Cash Flow Information	'
	Supplemental Cash Flow Information (in thousands)
		Nine Months Ended September 30,
		2014			2013
	Supplemental Disclosures:
	Cash paid for interest, net of amounts capitalized	$	8,628		$	8,880
	Cash received for tax refunds	205			95
	Supplemental disclosures of non-cash investing and financing activities:
	Accounts payable related to capital expenditures	23,144			34,238
	Change in value recognized in other comprehensive income	11			112
	Capital lease obligations	577			1,399
	Accrued distribution equivalent rights on LTIP units	562			191
	Series A Convertible preferred unit in-kind distributions and fair value adjustments	5,130			1,255
	Class B Convertible unit issuance, net	324,413			—
	Consideration paid in excess of purchase price for the TexStar Rich Gas System	99,625			—
Capitalization of Interest Cost	'
	We incurred the following interest costs (in thousands):
		Three Months Ended September 30,						Nine Months Ended September 30,
		2014			2013			2014			2013
	Total interest costs	$	5,529		$	3,887		$	10,826		$	10,035
	Capitalized interest included in property, plant and equipment, net	(933		)	(300		)	(1,486		)	(1,300		)
	Interest expense	$	4,596		$	3,587		$	9,340		$	8,735
Deferred Financing Costs	'
	Changes in deferred financing costs are as follows (in thousands):
		2014
	Deferred financing costs, January 1	$	5,237
	Capitalization of deferred financing costs (1)	17,716
	Less:
	Amortization of deferred financing costs (2)	(3,596		)
	Deferred financing costs, September 30	$	19,357
	(1) See Note 7.
	(2) This amount includes $2.3 million written off in connection with exiting the Previous Credit Facility and entering into the Senior Credit Facilities in August 2014.

EQUITY_IN_JOINT_VENTURES_Table

EQUITY IN JOINT VENTURES (Tables)	9 Months Ended
	Sep. 30, 2014
Equity Method Investments and Joint Ventures [Abstract]	'
Schedules of joint ventures	'
	The joint ventures’ summarized financial data from their statements of operations since we obtained our equity interests in the joint ventures on August 4, 2014 is as follows (in thousands):
		Three and Nine Months Ended September 30, 2014
		T2 Eagle Ford			T2 Cogen			T2 LaSalle
	Revenue	$	516		$	410		$	229
	Net loss	(3,234		)	(2,871		)	(1,021		)
	The Partnership’s equity in losses of joint venture investments is comprised of the following for the three and nine months ended September 30, 2014 (in thousands):
		Three and Nine Months Ended
		30-Sep-14
	T2 Eagle Ford	$	(1,618	)
	T2 Cogen	(1,435		)
	T2 LaSalle	(255		)
	Equity in losses of joint venture investments	$	(3,308	)
	The Partnership’s investments in joint ventures is comprised of the following as of September 30, 2014 (in thousands):
		30-Sep-14
	T2 Eagle Ford	$	110,152
	T2 Cogen	18,994
	T2 LaSalle	19,702
	Investments in joint ventures	$	148,848

ORGANIZATION_AND_DESCRIPTION_O1

ORGANIZATION AND DESCRIPTION OF BUSINESS (Details)	9 Months Ended
	Sep. 30, 2014
	segment
	plant
Organization, Consolidation and Presentation of Financial Statements [Abstract]	'
Number of fractionation plants	2
Number of reportable segments	1

ACQUISITION_Details

ACQUISITION (Details) (USD $)

0 Months Ended

3 Months Ended

9 Months Ended

3 Months Ended

9 Months Ended

3 Months Ended

9 Months Ended

3 Months Ended

9 Months Ended

3 Months Ended

9 Months Ended

0 Months Ended

9 Months Ended

0 Months Ended

9 Months Ended

0 Months Ended

9 Months Ended

0 Months Ended

9 Months Ended

0 Months Ended

9 Months Ended

Aug. 04, 2014

Mar. 08, 2014

Mar. 06, 2014

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2013

Aug. 04, 2014

Aug. 04, 2014

Sep. 30, 2014

Aug. 04, 2014

Dec. 31, 2013

Sep. 30, 2014

Sep. 30, 2014

Mar. 06, 2014

Sep. 30, 2013

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2014

Sep. 30, 2013

Aug. 04, 2014

Sep. 30, 2014

Sep. 30, 2014

Aug. 04, 2014

Sep. 30, 2014

Aug. 04, 2014

Sep. 30, 2014

Aug. 04, 2014

Sep. 30, 2014

Aug. 04, 2014

Sep. 30, 2014

Sep. 30, 2014

plant

Pipelines [Member]

TexStar Rich Gas System [Member]

TexStar Rich Gas System [Member]

TexStar Rich Gas System [Member]

Onyx Midstream LP & Onyx Pipeline Company [Member]

Onyx Midstream LP & Onyx Pipeline Company [Member]

Onyx Midstream LP & Onyx Pipeline Company [Member]

Onyx Midstream LP & Onyx Pipeline Company [Member]

Onyx Midstream LP & Onyx Pipeline Company [Member]

Onyx Midstream LP & Onyx Pipeline Company [Member]

Onyx Midstream LP & Onyx Pipeline Company [Member]

Onyx Midstream LP & Onyx Pipeline Company [Member]

Onyx Midstream LP & Onyx Pipeline Company [Member]

Onyx Midstream LP & Onyx Pipeline Company [Member]

Onyx Midstream LP & Onyx Pipeline Company [Member]

Onyx Midstream LP & Onyx Pipeline Company [Member]

Common Limited Partners [Member]

Common Limited Partners [Member]

Common Limited Partners [Member]

Class B Convertible Units [Member]

Class B Convertible Units [Member]

Class B Convertible Units [Member]

Class B Convertible Units [Member]

Subordinated Limited Partners [Member]

Subordinated Limited Partners [Member]

General Partner [Member]

General Partner [Member]

General Partner [Member]

Pro Forma [Member]

Pro Forma [Member]

Pro Forma [Member]

Common Units [Member]

Common Units [Member]

Common Units [Member]

Subordinated Units [Member]

Subordinated Units [Member]

Subordinated Units [Member]

Class B Convertible Units [Member]

Class B Convertible Units [Member]

Pro Forma [Member]

Pro Forma [Member]

Pro Forma [Member]

Pro Forma [Member]

Pro Forma [Member]

Pro Forma [Member]

Business Acquisition [Line Items]

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Payments to Acquire Businesses, Gross

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$80,000,000

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Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net

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404,414,000

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Conversion of Stock, Shares Issued

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'

'

14,633,000

14,633,000

'

'

'

'

0

Shares Issued, Price Per Share

'

'

'

'

'

'

$22.17

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Proceeds from (Repayments of) Related Party Debt

'

'

'

'

-100,000,000

0

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Number of power plants

'

'

2

2

2

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Contractual agreement, term

'

'10 years

'10 years

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Fair Value of Assets Acquired and Liabilities Assumed, Net [Abstract]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Current assets

'

'

'

'

'

'

'

'

'

295,000

'

'

'

730,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Property, plant, and equipment

'

'

'

'

'

'

'

'

'

255,220,000

'

'

'

39,413,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Noncontrolling Interest in Joint Ventures

'

'

'

'

'

'

'

'

'

152,050,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Total assets acquired

'

'

'

'

'

'

'

'

'

407,565,000

'

'

'

40,143,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Current liabilities assumed

'

'

'

'

'

'

'

'

'

'

'

'

'

-1,407,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Other liabilities assumed

'

'

'

'

'

'

'

'

'

'

'

'

'

-100,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Net identifiable assets acquired

'

'

'

'

'

'

'

100,000,000

'

304,789,000

'

'

'

38,636,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Goodwill

'

'

'

'

'

'

'

'

99,625,000

99,625,000

0

0

0

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Acquisition related costs

'

'

'

10,500,000

10,800,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Business Acquisition, Pro Forma Information [Abstract]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Total revenue

'

'

'

'

'

'

'

'

'

'

'

'

'

'

161,777,000

620,796,000

462,818,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Net loss

'

'

'

'

'

'

'

'

'

'

'

500,000

900,000

'

-4,547,000

-29,104,000

-18,533,000

2,067,000

-19,132,000

-9,794,000

-2,553,000

-7,823,000

-9,624,000

'

'

'

'

'

'

'

'

'

'

'

'

Net loss per common unitb(basic and diluted) (in dollars per share)

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

$0.14

($0.91)

($0.67)

($0.21)

($0.64)

($0.79)

'

'

'

'

'

'

'

'

'

'

'

'

Business Acquisition, Pro Forma Earnings Per Share, Diluted

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

$130

($910)

($670)

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Revenue recognized since acquisition date

'

'

'

200,000

600,000

'

'

'

'

'

'

1,300,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Net loss recognized since acquisition date

'

'

'

'

'

'

'

'

'

'

'

'

3,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Business Combination, Liabilities Arising from Contingencies, Amount Recognized

'

'

'

'

'

'

'

'

'

-102,776,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Business Combination, Consideration Transferred

$99,625,000

'

'

'

($99,625,000)

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

$45,880,000

($45,880,000)

'

$28,208,000

($28,208,000)

'

'

$23,544,000

($23,544,000)

$1,993,000

($1,993,000)

'

NET_LOSS_INCOME_PER_LIMITED_PA2

NET (LOSS) INCOME PER LIMITED PARTNER UNIT AND DISTRIBUTIONS (Details) (USD $)

3 Months Ended

9 Months Ended

0 Months Ended

3 Months Ended

9 Months Ended

3 Months Ended

9 Months Ended

3 Months Ended

9 Months Ended

3 Months Ended

9 Months Ended

3 Months Ended

9 Months Ended

3 Months Ended

9 Months Ended

3 Months Ended

9 Months Ended

0 Months Ended

9 Months Ended

3 Months Ended

9 Months Ended

9 Months Ended

In Thousands, except Share data, unless otherwise specified

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2014

Sep. 30, 2013

Aug. 04, 2014

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Aug. 04, 2014

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2014

Sep. 30, 2013

Apr. 12, 2013

Sep. 30, 2014

General Partner [Member]

General Partner [Member]

General Partner [Member]

General Partner [Member]

General Partner [Member]

Class B Convertible Units [Member]

Class B Convertible Units [Member]

Class B Convertible Units [Member]

Class B Convertible Units [Member]

Limited Partner, units authorized

Limited Partner, units authorized

Limited Partner, units authorized

Limited Partner, units authorized

Subordinated Units [Member]

Subordinated Units [Member]

Subordinated Units [Member]

Subordinated Units [Member]

Long Term Incentive Plan [Member]

Long Term Incentive Plan [Member]

Series A Preferred Stock [Member]

Series A Preferred Stock [Member]

Class B Convertible Units [Member]

Class B Convertible Units [Member]

Class B Convertible Units [Member]

Class B Convertible Units [Member]

Class B Convertible Units [Member]

Class B Convertible Units [Member]

Common Units [Member]

Preferred units issued

Preferred units issued

Preferred units issued

Preferred units issued

Preferred units issued

Preferred units issued

General Partner [Member]

Limited Partner, units authorized

Limited Partner, units authorized

General Partner [Member]

Earnings Per Limited Partner Unit

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount

32,757,204

'

25,447,215

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

27,972

20,221

1,739,473

1,052,329

'

'

'

'

'

'

'

'

'

'

'

'

'

Conversion of Stock, Shares Issued

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

0

14,633,000

14,633,000

0

'

'

'

'

'

'

'

Limited Liability Company (LLC) or Limited Partnership (LP), Managing Member or General Partner, Ownership Interest

'

'

2.00%

'

100.00%

'

'

2.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

2.00%

Preferred Units, Issued

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

1,715,000

'

Net Income (Loss) Allocated to General Partners

'

'

'

'

'

'

'

($581)

($334)

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Preferred unit Conversion Common Units Exchange Ratio on Satisfaction of Specified Condition

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

110.00%

'

'

'

'

'

Number of Common Units to be Issued on Conversion of One Preferred Unit

'

'

'

'

'

'

'

0

'

'

'

0

'

'

'

1,762,951

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

2,015,638

'

'

'

'

'

Net loss

-24,778

-4,069

-29,026

-16,645

'

-523

-81

-622

'

-6,778

'

-6,778

'

'

'

'

-8,172

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Dividends, Preferred Stock, Paid-in-kind

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

0

-696

-534

-1,255

'

'

Distribution Made to Member or Limited Partner, Distribution Paid In-kind, Fair Value Disclosure

'

'

'

0

'

-112

0

-123

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Net loss attributable to partners

-24,466

-98

-34,279

-17,900

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

General partner's interest

-24,778

-4,069

-29,026

-16,645

'

-523

-81

-622

'

-6,778

'

-6,778

'

'

'

'

-8,172

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Limited partners' interest

'

'

'

'

'

'

'

'

-309

'

'

-6,778

'

-11,156

'

-19,084

-8,784

-6,009

-2,340

-7,795

-8,782

'

'

'

'

'

'

'

'

'

'

2,323

'

'

'

'

'

'

Interest in net income (loss)

'

'

'

'

'

'

'

'

'

'

'

'

'

-11,156

2,323

-19,084

-8,784

-6,009

-2,340

-7,795

-8,782

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Dilutive interest in net loss

'

'

'

'

'

'

'

'

'

'

'

'

'

($11,156)

($2,003)

($19,084)

($8,784)

($6,009)

($2,340)

($7,795)

($8,782)

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Weighted-average units - basic

'

'

'

'

'

'

'

'

'

'

'

'

'

22,925,979

12,222,692

20,911,472

12,219,699

12,213,713

12,213,713

12,213,713

12,213,713

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Weighted-average units - dilutive

'

'

'

'

'

'

'

'

'

'

'

'

'

22,925,979

13,990,137

20,911,472

12,219,699

12,213,713

12,213,713

12,213,713

12,213,713

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Basic net income (loss) per common unit

'

'

'

'

'

'

'

'

'

'

'

'

'

($0.49)

$0.19

($0.91)

($0.72)

($0.49)

($0.19)

($0.64)

($0.72)

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Earnings Per Share, Diluted

($0.49)

($0.14)

($0.91)

($0.72)

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Distribution Made to Member or Limited Partner Minimum Quarterly Distributions Declared Per Unit

$0.40

'

$0.40

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

$0.33

$0.44

'

'

'

'

'

'

'

$0.40

'

'

'

NET_LOSS_INCOME_PER_LIMITED_PA3

NET (LOSS) INCOME PER LIMITED PARTNER UNIT AND DISTRIBUTIONS (Distributions) (Details) (USD $)

3 Months Ended

9 Months Ended

0 Months Ended

3 Months Ended

9 Months Ended

0 Months Ended

3 Months Ended

9 Months Ended

3 Months Ended

1 Months Ended

3 Months Ended

1 Months Ended

3 Months Ended

9 Months Ended

3 Months Ended

9 Months Ended

3 Months Ended

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2013

Aug. 04, 2014

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2014

15-May-13

Apr. 12, 2013

15-May-13

Apr. 12, 2013

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Jun. 30, 2013

Jun. 30, 2013

Mar. 31, 2014

Dec. 31, 2013

Sep. 30, 2013

Jun. 30, 2013

Jun. 30, 2013

Mar. 31, 2014

Dec. 31, 2013

Sep. 30, 2013

Jun. 30, 2013

Mar. 31, 2014

Mar. 31, 2014

Sep. 30, 2014

Jun. 30, 2014

Mar. 31, 2014

Dec. 31, 2013

Sep. 30, 2013

Jun. 30, 2013

Mar. 31, 2013

Dec. 31, 2012

Sep. 30, 2014

Jun. 30, 2014

Mar. 31, 2014

Dec. 31, 2013

Sep. 30, 2013

Jun. 30, 2013

Mar. 31, 2013

Dec. 31, 2012

Sep. 30, 2014

Jun. 30, 2014

Mar. 31, 2014

Dec. 31, 2013

Sep. 30, 2013

Jun. 30, 2013

Mar. 31, 2013

Dec. 31, 2012

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2014

Jun. 30, 2014

Mar. 31, 2014

Dec. 31, 2013

Sep. 30, 2013

Jun. 30, 2013

Mar. 31, 2013

Dec. 31, 2012

Dec. 31, 2012

Sep. 30, 2014

Jun. 30, 2013

Jun. 30, 2013

Mar. 13, 2014

Mar. 27, 2013

Nov. 07, 2012

General Partner [Member]

General Partner [Member]

General Partner [Member]

General Partner [Member]

General Partner [Member]

General Partner [Member]

Series A Convertible Preferred Units [Member]

Series A Convertible Preferred Units [Member]

Series A Convertible Preferred Units [Member]

Series A Convertible Preferred Units [Member]

Series A Convertible Preferred Units [Member]

Series A Convertible Preferred Units [Member]

PIK distribution

In Kind Distribution [Member]

In Kind Distribution [Member]

In Kind Distribution [Member]

In Kind Distribution [Member]

In Kind Distribution [Member]

In Kind Distribution [Member]

In Kind Distribution [Member]

In Kind Distribution [Member]

In Kind Distribution [Member]

In Kind Distribution [Member]

In Kind Distribution [Member]

In Kind Distribution [Member]

In Kind Distribution [Member]

Cash

Cash

Cash

Cash

Cash

Cash

Cash

Cash

Cash

Cash

Cash

Cash

Cash

Cash

Cash

Cash

Cash

Cash

Cash

Cash

Cash

Cash

Cash

Cash

Cash

Cash

Cash

Cash

Cash

Cash

Cash

Cash

Cash

Cash

Cash

Maximum [Member]

QTD

YTD

Credit Facility, due November 2017

Credit Facility, due November 2017

Credit Facility, due November 2017

item

General Partner [Member]

Series A Convertible Preferred Units [Member]

Series A Convertible Preferred Units [Member]

Series A Convertible Preferred Units [Member]

Series A Convertible Preferred Units [Member]

Series A Convertible Preferred Units [Member]

Series A Convertible Preferred Units [Member]

Series A Convertible Preferred Units [Member]

Series A Convertible Preferred Units [Member]

Series A Convertible Preferred Units [Member]

Series A Convertible Preferred Units [Member]

Series A Convertible Preferred Units [Member]

Preferred units issued

Preferred units issued

General Partner [Member]

General Partner [Member]

General Partner [Member]

General Partner [Member]

General Partner [Member]

General Partner [Member]

General Partner [Member]

General Partner [Member]

Limited Partner, units authorized

Limited Partner, units authorized

Limited Partner, units authorized

Limited Partner, units authorized

Limited Partner, units authorized

Limited Partner, units authorized

Limited Partner, units authorized

Limited Partner, units authorized

Limited Partner, units authorized

Limited Partner, units authorized

Subordinated Units [Member]

Subordinated Units [Member]

Subordinated Units [Member]

Subordinated Units [Member]

Subordinated Units [Member]

Subordinated Units [Member]

Subordinated Units [Member]

Subordinated Units [Member]

Series A Convertible Preferred Units [Member]

Cash

In Kind Distribution [Member]

In Kind Distribution [Member]

General Partner [Member]

General Partner [Member]

General Partner [Member]

General Partner [Member]

General Partner [Member]

General Partner [Member]

Limited Partners

Limited Partners

Limited Partners

Limited Partners

Limited Partners

Limited Partners

Limited Partners

Limited Partners

Limited Partners

Limited Partners

Limited Partners

Limited Partners

Limited Partners

Limited Partners

Limited Partners

Limited Partners

Limited Partners

Limited Partners

Distributions made to Limited Partner [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Distribution period

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'45 days

'

'

'

'

'

Amount raised through issuance of units

'

'

'

'

'

'

'

'

'

'

'

'

$40,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Preferred Units, Issued

'

'

'

'

'

'

'

'

'

'

1,715,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Preferred units issued

'

'

'

'

'

'

'

'

'

248,675

1,466,325

'

1,500,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

unused borrowings

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

-350,000,000

-250,000,000

-350,000,000

Number of quarters for quarterly distributions in-kind required to be paid

'

'

'

'

'

'

'

'

'

'

'

4

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Distribution percentage

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

7.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Ownership interest held by general partners (as a percent)

'

2.00%

'

100.00%

'

'

2.00%

'

'

'

'

'

'

'

2.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Minimum annual distribution (in dollars per unit)

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

$1.60

'

'

$1.60

'

'

'

Series A preferred units , PIK distribution earned

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Distribution Made to Member or Limited Partner Unit Distributions Per Unit

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

$0.20

$0.40

$0.40

$0.40

$0.35

'

'

'

'

'

'

'

$0.33

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

In-Kind Unit Distribution (in dollars)

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

2,199,000

31,513,000

30,971,000

30,439,000

22,276,000

45,000

643,000

632,000

621,000

454,000

256,078,000

5,226,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

In-Kind Distributions (in dollars per unit)

'

'

0

'

112,000

0

123,000

'

'

'

'

'

'

'

'

'

'

51,000

534,000

558,000

511,000

512,000

1,000

11,000

11,000

10,000

10,000

5,467,000

112,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Distribution Made to Member or Limited Partner Minimum Quarterly Distributions Declared Per Unit

$0.40

$0.40

'

'

'

'

'

'

'

'

'

'

'

$0.40

'

'

$0.40

'

'

'

'

'

'

'

'

'

'

'

'

$0.40

$0.40

$0.40

$0.40

$0.40

$0.40

$0.40

$0.40

'

'

'

'

'

'

'

'

$0.40

'

'

'

$0.40

'

'

'

$1.20

$1.20

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Common units, distribution declared and paid

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Distribution Made to Member or Limited Partner, Distribution Paid in Cash

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

$9,933,000

$14,575,000

$13,762,000

$13,755,000

$9,987,000

$9,986,000

$9,973,000

$5,982,000

$413,000

$290,000

$290,000

$289,000

$214,000

$210,000

$199,000

$120,000

$9,520,000

$9,399,000

$8,586,000

$8,581,000

$4,888,000

$4,890,000

$4,888,000

$2,931,000

'

'

$0

$4,886,000

$4,886,000

$4,885,000

$4,885,000

$4,886,000

$4,886,000

$2,931,000

'

'

'

'

'

'

'

General partner units issued (in shares)

'

'

'

'

'

'

'

5,075

29,925

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Distribution Made to Limited Partner, Distributions Paid, Per Unit

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

$0.20

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

$0.24

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

$0.40

$1.60

'

'

'

FINANCIAL_INSTRUMENTS_Details

FINANCIAL INSTRUMENTS (Details) (USD $)

1 Months Ended

9 Months Ended

3 Months Ended

9 Months Ended

12 Months Ended

3 Months Ended

9 Months Ended

9 Months Ended

3 Months Ended

9 Months Ended

Feb. 28, 2014

Sep. 30, 2014

Sep. 30, 2013

Jun. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2014

Sep. 30, 2013

Dec. 31, 2013

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2014

Sep. 30, 2013

Commodity Swaps [Member]

Commodity Swaps [Member]

Commodity Swaps [Member]

Commodity Swaps [Member]

Commodity Swaps [Member]

Interest Rate Cap [Member]

Interest Rate Cap [Member]

Interest Rate Cap [Member]

Interest Rate Cap [Member]

Recurring basis

Recurring basis

Designated as Hedging Instrument [Member]

Designated as Hedging Instrument [Member]

Designated as Hedging Instrument [Member]

Designated as Hedging Instrument [Member]

Designated as Hedging Instrument [Member]

MMBTU

Significant Other Observable Inputs (Level 2)

Significant Other Observable Inputs (Level 2)

Interest rate swap liabilities

Interest Rate Cap [Member]

Interest Rate Cap [Member]

Interest Rate Cap [Member]

Interest Rate Cap [Member]

Interest rate swap liabilities

Interest rate swap liabilities

Fair value of financial instruments

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Gain (Loss) on Sale of Derivatives

'

'

'

'

'

$213,000

($93,000)

($875,000)

($149,000)

'

($74,000)

($27,000)

($127,000)

($81,000)

'

'

'

'

'

'

'

Derivative, Nonmonetary Notional Amount, Energy Measure

'

'

'

'

'

'

'

'

'

33,722

'

'

'

'

'

'

'

'

'

'

'

Derivative Instruments, Gain (Loss) Recognized in Other Comprehensive Income (Loss), Effective Portion, Net

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

-11,000

0

-82,000

'

-112,000

Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

0

108,000

221,000

302,000

Derivative, Notional Amount

'

50,000,000

'

140,000,000

'

'

'

'

'

'

'

'

'

'

'

'

150,000,000

'

'

'

'

Unrealized Gain (Loss) on Derivatives

'

-539,000

0

'

'

-207,000

0

-338,000

'

'

-21,000

0

-201,000

0

'

'

'

'

'

'

'

Repayments of Lines of Credit

148,500,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Derivative Instruments, Gain (Loss) Reclassification from Accumulated OCI to Income, Estimated Net Amount to be Transferred

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

-100,000

'

'

'

'

Derivative liability, non-current

'

26

'

'

0

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Fair value measurement

'

($201)

'

'

($263)

'

'

'

'

'

'

'

'

'

($175,000)

($263,000)

'

'

'

'

'

Derivative, Description of Variable Rate Basis

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'one-month LIBOR

'

'

'

'

Derivative, Fixed Interest Rate

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

0.54%

'

'

'

'

FINANCIAL_INSTRUMENTS_Details_

FINANCIAL INSTRUMENTS (Details 2) (USD $)

1 Months Ended

9 Months Ended

9 Months Ended

3 Months Ended

9 Months Ended

3 Months Ended

9 Months Ended

3 Months Ended

9 Months Ended

12 Months Ended

Feb. 28, 2014

Sep. 30, 2014

Sep. 30, 2013

Jun. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Jun. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2014

Sep. 30, 2013

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Dec. 31, 2013

Interest Rate Swap [Member]

Interest Rate Swap 0.327% [Member]

Interest Rate Swap 1.198% [Member]

Interest rate cap contract

Interest rate cap contract

Interest rate cap contract

Interest rate cap contract

Interest rate cap contract

Interest rate cap contract

Interest rate cap contract

Interest rate cap contract

Interest rate swap contract

Commodity Swaps

Commodity Swaps

Commodity Swaps

Commodity Swaps

Commodity Swaps

Other Current Assets

Other Current Assets

Other Current Liabilities

Other Current Liabilities

Fair Value Measurement [Domain]

Fair Value Measurement [Domain]

Fair Value Measurement [Domain]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Derivatives designated as hedging instruments

Derivatives designated as hedging instruments

Derivatives designated as hedging instruments

Derivatives designated as hedging instruments

Derivatives designated as hedging instruments

MMBTU

Commodity Swaps

Commodity Swaps

Commodity Swaps

Commodity Swaps

Interest Rate Swap 0.327% [Member]

Interest Rate Swap 1.198% [Member]

Interest rate swap contract

Fair Value, Inputs, Level 2 [Member]

Fair Value, Inputs, Level 2 [Member]

Interest Rate Swap [Member]

Interest Rate Swap [Member]

Derivatives

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Derivative Liability

'

$201

'

'

$263

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

$175,000

$263,000

Derivative Liability, Noncurrent

'

26

'

'

0

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Derivative Asset, Fair Value, Gross Asset

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

0

140,000

'

'

'

'

'

'

'

Derivative Liability, Fair Value, Gross Liability

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

-20,000

-218,000

-20,000

'

'

'

'

'

Derivative Liability, Amount Offset Against Derivative Asset

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

0

20,000

'

'

'

'

'

Notional amount

'

50,000,000

'

140,000,000

'

150,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Description of variable rate

'

'

'

'

'

'one-month LIBOR

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

LIBOR based fixed rate paid (as a percent)

'

'

'

'

'

0.54%

0.33%

1.20%

'

'

'

'

'

'

'

'

1.20%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Repayments of Lines of Credit

148,500,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Derivative Liability, Fair Value, Gross Asset

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

-140

-31

-30

'

'

Change in value recognized in other comprehensive income/(loss) (effective portion)

'

'

'

'

'

-11,000

'

'

'

'

'

'

0

-82,000

'

-112,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Loss reclassified from accumulated other comprehensive loss to income/loss

'

'

'

'

'

'

'

'

'

'

'

'

0

108,000

221,000

302,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Estimated amount of hedging losses to be reclassified from accumulated other comprehensive income into income/(loss)

'

'

'

'

'

100,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Unrealized loss

'

-539,000

0

'

'

'

'

'

-21,000

0

-201,000

0

'

'

'

'

'

-207,000

0

-338,000

'

'

'

'

'

'

'

'

'

'

'

Realized (loss) on derivatives

'

'

'

'

'

'

'

'

-74,000

-27,000

-127,000

-81,000

'

'

'

'

'

213,000

-93,000

-875,000

-149,000

'

'

'

'

'

'

'

'

'

'

Volume of month-ahead swap contracts (in MMBtu)

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

33,722

'

'

'

'

'

'

'

'

'

Derivative, Fair Value, Net

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

$0

$120,000

($218,000)

$0

'

'

'

'

'

LONGLIVED_ASSETS_Details

LONG-LIVED ASSETS (Details) (USD $)

1 Months Ended

3 Months Ended

9 Months Ended

12 Months Ended

9 Months Ended

12 Months Ended

9 Months Ended

12 Months Ended

9 Months Ended

12 Months Ended

9 Months Ended

12 Months Ended

9 Months Ended

12 Months Ended

9 Months Ended

Jan. 31, 2013

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2014

Sep. 30, 2013

Dec. 31, 2013

Mar. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2012

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2012

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2012

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2012

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2012

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Property, plant and equipment excluding construction in progress and land and other

Property, plant and equipment excluding construction in progress and land and other

Pipelines

Pipelines

Pipelines

Gas processing, treating and other plants

Gas processing, treating and other plants

Gas processing, treating and other plants

Compressors

Compressors

Compressors

Rights of way and easements

Rights of way and easements

Rights of way and easements

Furniture, fixtures and equipment

Furniture, fixtures and equipment

Furniture, fixtures and equipment

Capital lease vehicles

Capital lease vehicles

Capital lease vehicles

Capital lease vehicles

Construction in progress

Construction in progress

Land and other

Land and other

Maximum [Member]

Minimum [Member]

Property, plant and equipment

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Estimated useful life

'

'

'

'

'

'

'

'

'

'30 years

'30 years

'

'15 years

'15 years

'

'7 years

'7 years

'

'15 years

'15 years

'

'5 years

'5 years

'

'

'

'5 years

'3 years

'

'

'

'

Total property, plant and equipment

'

$944,900,000

'

$944,900,000

'

$644,356,000

'

'

'

$393,131,000

'

$344,721,000

$481,939,000

'

$254,133,000

$37,936,000

'

$20,030,000

$26,338,000

'

$20,729,000

$3,610,000

'

$3,347,000

$1,946,000

$1,396,000

'

'

'

'

'

'

Accumulated depreciation and amortization

'

-118,565,000

'

-118,565,000

'

-79,908,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Property, plant and equipment, net

'

947,928,000

'

947,928,000

'

575,795,000

'

826,335,000

564,448,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

96,090,000

6,039,000

25,503,000

5,308,000

Depreciation expense

'

11,629,000

9,447,000

29,135,000

24,958,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Service charges

5,800,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Amount recovered from insurance

'

'

'

600,000

'

1,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Deductible amount

300,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Estimated Insurance Recoveries

'

3,900,000

'

3,900,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Intangible assets, net

'

$1,525,000

'

$1,525,000

'

$1,568,000

$1,554,211

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Finite-Lived Intangible Asset, Useful Life

'

'

'

'30 years

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

LONGTERM_DEBT_Details

LONG-TERM DEBT (Details) (USD $)

0 Months Ended

1 Months Ended

3 Months Ended

9 Months Ended

0 Months Ended

3 Months Ended

3 Months Ended

9 Months Ended

9 Months Ended

3 Months Ended

Aug. 04, 2014

Nov. 30, 2012

Sep. 30, 2014

Mar. 31, 2014

Sep. 30, 2013

Sep. 30, 2014

Sep. 30, 2013

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Jun. 30, 2013

Aug. 04, 2014

Sep. 30, 2014

Mar. 13, 2014

Dec. 31, 2013

Mar. 27, 2013

Nov. 07, 2012

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2014

Sep. 30, 2013

Aug. 04, 2014

Nov. 07, 2012

Sep. 30, 2012

Aug. 04, 2014

Mar. 31, 2015

Sep. 30, 2015

Jun. 30, 2015

General Partner [Member]

General Partner [Member]

Series A Convertible Preferred Units [Member]

Credit Facility, due November 2017

Credit Facility, due November 2017

Credit Facility, due November 2017

Credit Facility, due November 2017

Credit Facility, due November 2017

Credit Facility, due November 2017

Credit Facility, due November 2017

Credit Facility, due November 2017

Credit Facility, due November 2017

Credit Facility, due November 2017

Letters of credit

Letters of credit

Credit Agreement, due June 2014

Pipelines [Member]

Scenario, Forecast [Member]

Scenario, Forecast [Member]

Scenario, Forecast [Member]

30-Sep-13

30-Sep-13

30-Sep-13

30-Sep-13

Credit Facility, due November 2017

Secured Debt [Member]

Secured Debt [Member]

LONG TERM DEBT

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Debt Instrument, Term

'

'5 years

'

'

'

'5 years

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Long-term Debt

'

'

$457,875,000

'

'

$457,875,000

'

$267,300,000

'

'

'

'

$9,000,000

'

$267,300,000

'

'

'

'

'

'

'

'

'

'

'

'

'

Other Long-term Debt

'

'

448,875,000

'

'

448,875,000

'

0

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

unused borrowings

'

'

'

'

'

'

'

'

'

'

'

'

'

350,000,000

'

250,000,000

350,000,000

'

'

'

'

75,000,000

75,000,000

'

'

'

'

'

number of amendments

'

'

'

4

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Debt Instrument Leverage Ratio

'

'

'

'

'

'

'

'

'

'

'

4.5

5.75

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Debt Instrument, Covenant Maximum Adjusted Consolidated Total Leverage Ratio

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

5.5

5

5.25

Line of Credit Facility, Amount Outstanding

'

'

200,000,000

'

'

200,000,000

'

'

23,030,000

31,260,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Line of Credit Facility, Remaining Borrowing Capacity

'

'

'

'

'

'

'

'

'

'

'

'

167,970,000

'

69,000

'

'

'

'

'

'

'

'

'

'

'

'

'

Average outstanding borrowings

'

'

372,072,000

'

254,200,000

252,005,000

238,900,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Applicable margin under LIBOR borrowings

'

'

'

'

'

'

'

'

'

'

'

4.25%

'

'

'

'

'

'

'

'

'

'

'

3.25%

'

'

'

'

Line of Credit Facility, Interest Rate Description

'0.01

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Weighted average interest rate

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

4.80%

4.80%

4.20%

4.30%

'

'

'

'

'

'

'

Maximum quarterly distributions until the target leverage ratio is achieved (in dollars per share)

'

'

'

'

'

$0.40

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Total capital infusion

'

'

'

'

'

'

'

'

'

'

40,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Maximum borrowings

'

'

465,000,000

'

258,500,000

465,000,000

258,500,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Proceeds from Issuance of Other Long-term Debt

450,000,000

'

'

'

'

450,000,000

0

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

100,000,000

'

'

'

Amortization of Debt Discount (Premium)

0.01

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Debt Instrument, Periodic Payment

$1,125,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

COMMITMENTS_AND_CONTINGENCIES_1

COMMITMENTS AND CONTINGENCIES (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013
	mi		mi
Purchase commitments	'	'	'	'	'
Capital Lease Obligations, Current	$484	'	$484	'	$481
Pipeline, Length of Extension	45	'	45	'	'
Capital leases	'	'	'	'	'
Amortization expense related to the capital leases	100,000	100,000	400,000	400,000	'
Capital Lease Obligations Incurred	100,000	200,000	577,000	1,399,000	'
Operating Leases	'	'	'	'	'
Expenses associated with operating leases	600,000	400,000	1,200,000	1,100,000	'
Capital Lease Obligations, Noncurrent	569	'	569	'	427
Capital Lease Obligations	1,053	'	1,053	'	908
Equipment related to capital projects	'	'	'	'	'
Purchase commitments	'	'	'	'	'
Commitments	'	'	25,400,000	'	'
Other Capital Projects [Member]	'	'	'	'	'
Purchase commitments	'	'	'	'	'
Commitments	'	'	$0	'	'

TRANSACTIONS_WITH_RELATED_PART2

TRANSACTIONS WITH RELATED PARTIES (Details) (USD $)

3 Months Ended

9 Months Ended

3 Months Ended

9 Months Ended

3 Months Ended

9 Months Ended

3 Months Ended

9 Months Ended

3 Months Ended

9 Months Ended

3 Months Ended

9 Months Ended

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2014

Sep. 30, 2013

Dec. 31, 2013

Sep. 30, 2013

15-May-13

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

director

Preferred units issued

Preferred units issued

Management fees incurred

Management fees incurred

Management fees incurred

Management fees incurred

Management fees incurred

Management fees incurred

EIG [Member]

EIG [Member]

EIG [Member]

EIG [Member]

Affiliates of Wells Fargo Bank NA [Member]

Affiliates of Wells Fargo Bank NA [Member]

Affiliates of Wells Fargo Bank NA [Member]

Affiliates of Wells Fargo Bank NA [Member]

Tailwater [Member]

Tailwater [Member]

Tailwater [Member]

Tailwater [Member]

Southcross Holdings Common [Member]

T2 Cogen [Member]

T2 Cogen [Member]

Southcross Holdings Common [Member]

Vested units

Vested units

Related Party Transactions

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Related Party Transaction, Selling, General and Administrative Expenses from Transactions with Related Party

'

'

'

'

'

'

'

$3,076,000,000

$2,624,000,000

$9,057,000,000

$7,564,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Management fees incurred

96,000

51,000

286,000

387,000

'

'

'

80,000

51,000

270,000

387,000

0

0

8,000

0

8,000

0

'

'

'

'

8,000

0

8,000

0

'

'

'

'

Number of directors

'

'

3

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Purchase price of units (in dollars per share)

'

'

'

'

'

$22.86

$22.86

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Payments for Fees

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

8,900,000

400,000

9,100,000

1,000,000

'

'

'

'

'

'

'

'

Related Party Transaction Reimbursement Expenses from Transactions with Related Party

4,562,000,000

3,596,000,000

12,175,000,000

9,904,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Related Party Transaction, Amounts of Transaction

7,638,000,000

6,220,000,000

21,232,000,000

17,468,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Compensation

400,000

'

700,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Revenue from Related Parties

6,290,000

0

6,290,000

0

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Accounts Receivable, Related Parties

6,950,000

'

6,950,000

'

0

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

3,100,000

2,800,000

'

'

Due to Affiliate, Current

$4,977,000

'

$4,977,000

'

$0

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

$1,100,000

$3,000,000

SERIES_A_PREFERRED_UNITS_Detai

SERIES A PREFERRED UNITS (Details) (USD $)

3 Months Ended

9 Months Ended

0 Months Ended

3 Months Ended

9 Months Ended

0 Months Ended

3 Months Ended

9 Months Ended

3 Months Ended

9 Months Ended

3 Months Ended

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2014

Sep. 30, 2013

Aug. 04, 2014

Sep. 30, 2013

Sep. 30, 2014

Sep. 30, 2013

15-May-13

Apr. 12, 2013

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2014

Jun. 30, 2013

Sep. 30, 2013

Sep. 30, 2014

Sep. 30, 2013

General Partner [Member]

General Partner [Member]

General Partner [Member]

General Partner [Member]

Preferred units issued

Preferred units issued

Preferred units issued

Preferred units issued

Preferred units issued

Preferred units issued

Preferred units issued

Preferred units issued

Preferred units issued

item

General Partner [Member]

General Partner [Member]

Vested units

Conversion of Stock, Shares Converted

'

'

'

'

'

'

0

'

'

'

2,015,638

'

'

'

'

'

'

Preferred units issued

'

'

'

'

'

'

'

'

248,675

1,466,325

'

1,500,000

'

'

'

'

1,715,000

Purchase price of units (in dollars per share)

'

'

'

'

'

'

'

'

$22.86

'

'

$22.86

'

'

'

'

'

Proceeds from issuance of units

'

'

'

'

'

'

'

'

'

'

'

'

'

'

$39,200,000

'

'

Capital contribution

'

'

9,967,000

800,000

'

800,000

9,967,000

800,000

'

'

'

'

'

'

'

800,000

'

Ownership interest held by general partners (as a percent)

'

'

2.00%

'

100.00%

'

2.00%

'

'

'

'

'

'

'

'

2.00%

'

Total Capital Infusion

'

'

'

'

'

'

'

'

'

'

'

'

'

40,000,000

'

'

'

Valuation adjustment to maximum redemption value

-112,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Accrued distribution equivalent rights on the LTIP units

'

$4,667,000

$0

$0

'

'

'

'

'

'

$424,000

'

($4,596,000)

'

'

'

'

Voting rights per preferred unit

'

'

'

'

'

'

'

'

'

'

1

'

'

'

'

'

'

Number of first full quarters for entitlement to distribution in-kind for preferred unit holders

'

'

'

'

'

'

'

'

'

'

4

'

'

'

'

'

'

Rate per outstanding unit per quarter for preferred units to be distributed as in-kind distributions (in dollars per unit)

'

'

'

'

'

'

'

'

'

'

0.4

'

'

'

'

'

'

Rate per year of the per unit purchase price for preferred units to be distributed as in-kind distributions (as a percent)

'

'

'

'

'

'

'

'

'

'

7.00%

'

'

'

'

'

'

Rate per unit per quarter used for determination of cash distributions (in dollars per unit)

'

'

'

'

'

'

'

'

'

'

0.4

'

'

'

'

'

'

Exchange ratio of conversion of preferred units into common units on satisfaction of specified condition

'

'

'

'

'

'

'

'

'

'

1

'

'

'

'

'

'

PARTNERS_CAPITAL_Details

PARTNERS' CAPITAL (Details) (USD $)

3 Months Ended

9 Months Ended

9 Months Ended

9 Months Ended

9 Months Ended

9 Months Ended

9 Months Ended

0 Months Ended

1 Months Ended

3 Months Ended

9 Months Ended

9 Months Ended

3 Months Ended

9 Months Ended

0 Months Ended

9 Months Ended

1 Months Ended

0 Months Ended

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2014

Sep. 30, 2013

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Sep. 30, 2013

Dec. 31, 2013

Aug. 04, 2014

Feb. 28, 2014

Sep. 30, 2013

Sep. 30, 2014

Sep. 30, 2013

Dec. 31, 2013

15-May-13

Apr. 12, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Aug. 04, 2014

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Feb. 28, 2014

Nov. 05, 2014

Aug. 04, 2014

Nov. 05, 2014

Aug. 04, 2014

Limited Partner, units authorized

Limited Partner, units authorized

Limited Partner, units authorized

Southcross Energy LLC [Member]

Southcross Energy LLC [Member]

Southcross Holdings Common [Member]

Southcross Holdings Common [Member]

Class B Convertible Units [Member]

Class B Convertible Units [Member]

Subordinated Units [Member]

Subordinated Units [Member]

Subordinated Units [Member]

Subordinated Units [Member]

Subordinated Units [Member]

General Partner [Member]

General Partner [Member]

General Partner [Member]

General Partner [Member]

General Partner [Member]

General Partner [Member]

General Partner [Member]

General Partner [Member]

Series A Preferred Stock [Member]

Series A Preferred Stock [Member]

Class B Convertible Units [Member]

Class B Convertible Units [Member]

Class B Convertible Units [Member]

Class B Convertible Units [Member]

Class B Convertible Units [Member]

Class B Convertible Units [Member]

Class B Convertible Units [Member]

Class B Convertible Units [Member]

Class B Convertible Units [Member]

Class B Convertible Units [Member]

Common Stock [Member]

Subsequent Event [Member]

Subsequent Event [Member]

Subsequent Event [Member]

TexStar Rich Gas System [Member]

Limited Partner, units authorized

Southcross Energy LLC [Member]

Southcross Holdings Common [Member]

Subordinated Units [Member]

General Partner [Member]

Series A Preferred Stock [Member]

Subordinated Units [Member]

General Partner [Member]

Common Units [Member]

Partners' Capital Account, Units, Authorized for Public Offering

'

'

'

9,200,000

'

'

0

'

0

'

0

'

0

'

0

'

'

'

'

'

187,755

'

'

'

'

0

'

'

'

'

'

'

'

'

'

'

'

9,200,000

'

'

'

'

Partners' Capital Account, Units, Acquisitions

'

'

'

'

'

'

-1,863,713

'

1,863,713

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Conversion of Stock, Shares Issued

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

0

0

0

14,633,000

14,633,000

0

0

0

'

'

'

'

'

Distribution Made to Member or Limited Partner Minimum Quarterly Distributions Declared Per Unit

$0.40

$0.40

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

$0.33

$0.44

'

'

'

'

'

'

'

'

'

'

'

'

'

Business Acquisition, Percentage of Voting Interests Acquired

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

100.00%

Share-based Compensation Arrangement by Share-based Payment Award, Accelerated Vesting, Number

'

'

'

331,320

'

'

0

'

0

'

0

'

0

'

0

'

'

'

'

'

0

'

'

'

'

0

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Distribution Made to Limited Partner, Unit Distribution

'

'

'

0

'

'

0

'

0

'

0

'

0

'

0

'

'

'

'

'

311,233

'

'

'

'

62,484

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Conversion of Stock, Shares Converted

'

'

'

1,762,951

'

'

0

'

252,687

'

0

'

0

'

0

'

'

'

'

'

0

'

'

'

'

-1,832,399

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Partners' Capital Account, Public Sale of Units

'

$144,671,000

'

$144,671,000

'

'

'

'

'

'

$0

'

'

'

$0

'

'

'

'

'

$0

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Limited Partner, units issued

'

'

'

'

'

'

'

'

'

'

'

'

'

12,213,713

'

'

12,213,713

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Limited Partner, units authorized

'

'

'

25,179,351

'

13,963,713

'

'

'

'

'

'

12,213,713

'

12,213,713

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

12,213,713

'

'

'

Ownership Interest Percentage of Parent in Consolidated Subsidiaries

0.00%

0.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

General Partner, units outstanding

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

1,033,626

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Capital contribution

'

$9,967,000

$800,000

$0

$0

'

'

'

'

'

$0

'

'

'

$0

$0

'

'

'

$800,000

$9,967,000

$800,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Issue of additional general partner unit

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

5,075

29,925

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Ownership interest held by general partners (as a percent)

'

2.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

100.00%

'

'

2.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

2.00%

'

'

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

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

2.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Limited Partner, units outstanding

'

'

'

21,454,119

'

12,253,985

'

'

'

'

'

'

12,213,713

12,213,713

12,213,713

'

12,213,713

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Preferred Units, Outstanding

'

'

'

'

'

'

'

'

'

'

14,633,000

0

12,213,713

12,213,713

12,213,713

'

12,213,713

'

'

'

'

'

'

'

'

0

1,769,915

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Common Stock, Shares, Outstanding

'

'

'

21,684,543

'

10,390,272

0

1,863,713

2,116,400

0

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

2,116,400

'

Partners' Capital Account, Units

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

1,033,626

'

534,638

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

INCENTIVE_COMPENSATION_Details

INCENTIVE COMPENSATION (Details) (USD $)

3 Months Ended

9 Months Ended

9 Months Ended

3 Months Ended

9 Months Ended

3 Months Ended

9 Months Ended

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2014

Sep. 30, 2013

Aug. 04, 2014

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2014

Mar. 31, 2013

Dec. 31, 2013

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2014

Sep. 30, 2013

Vested units

Incentive Plan

Incentive Plan

Incentive Plan

Incentive Plan

Matching contributions expensed for employee savings plan

Matching contributions expensed for employee savings plan

Matching contributions expensed for employee savings plan

Matching contributions expensed for employee savings plan

Vested units

Unit based compensation

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Number

'

'

'

'

15,000

'

'

'

'

'

'

'

'

'

Matching contributions expensed for employee savings plan

'

'

'

'

'

'

'

'

'

'

$271,000

$166,000

$861,000

$476,000

Employer matching contribution, percent of employee's contribution

'

'

'

'

'

'

'

'

'

'

'

'

100.00%

'

Vesting period

'

'

'

'

'

'

'

'3 years

'

'

'

'

'

'

Units

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Unvested - December 31, 2013

'

'

'

'

'

'

'

'

'

182,673

'

'

'

'

Granted units

'

'

'

'

'

'

'

776,821

'

'

'

'

'

'

Units recaptured for tax withholdings

'

'

'

'

'

-325,551

'

'

'

'

'

'

'

'

Unvested at the end of the period (in shares)

'

'

'

'

'

'

'

474,243

'

182,673

'

'

'

'

Weighted-average grant date fair value

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Unvested - December 31, 2013

'

'

'

'

'

'

'

'

'

$22.55

'

'

'

'

Granted units

'

'

'

'

'

'

'

$19.82

'

'

'

'

'

'

Vested units

'

'

'

'

'

$17.45

'

'

'

'

'

'

'

'

Unvested - September 30, 2014

'

'

'

'

'

'

'

$20.46

'

$22.55

'

'

'

'

Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested Options Forfeited, Number of Shares

'

'

-200

23.01

'

'

'

'

'

'

'

'

'

'

Fair value

'

'

'

'

'

'

2,400,000

15,400,000

'

'

'

'

'

'

Share-based compensation cost not yet recognized

'

'

'

'

'

'

'

9,700,000

4,100,000

'

'

'

'

'

Period of amortization of compensation expense

'

'

'

'

'

'

'

'3 years

'

'

'

'

'

'

Units available for issuance (in shares)

'

'

'

'

'

'

1,508,421

909,934

'

'

'

'

'

'

Unit-based compensation

9,227,000

552,000

10,837,000

1,645,000

'

'

'

'

'

'

'

'

'

'

Units recaptured for tax withholdings

'

'

'

'

'

'

'

-159,500

'

'

'

'

'

'

Units recaptured for tax withholdings

'

'

'

'

'

'

'

$17.06

'

'

'

'

'

'

Employer matching contribution, percent of employees' gross pay

'

'

'

'

'

'

'

'

'

'

'

'

6.00%

'

Maximum annual contributions by employer, amount (per employee)

'

'

'

'

'

'

'

'

'

'

'

'

$17,500

'

REVENUES_Details

REVENUES (Details) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Revenues [Abstract]	'	'	'	'
Sales of natural gas	$123,874	$99,483	$392,633	$304,343
Sales of NGLs and condensate	65,046	45,916	171,201	112,128
Transportation, gathering and processing fees	22,466	15,124	55,860	42,644
Other	107	106	453	468
Total revenues	$211,493	$160,629	$620,147	$459,583

CONCENTRATION_OF_CREDIT_RISK_A2

CONCENTRATION OF CREDIT RISK AND TRADE ACCOUNTS RECEIVABLE (Details) (Customer concentration, Consolidated revenue)	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
			customer	customer
Trafigura AG	'	'	'	'
Consolidated revenue concentration	'	'	'	'
Concentration risk percentage	15.70%	13.10%	13.60%	'
Top ten customers	'	'	'	'
Consolidated revenue concentration	'	'	'	'
Number of top customers	'	'	10	10
Concentration risk percentage	66.90%	69.10%	67.10%	58.80%
Sherwin Alumina Company	'	'	'	'
Consolidated revenue concentration	'	'	'	'
Concentration risk percentage	'	12.00%	10.60%	12.30%

SUBSEQUENT_EVENTS_Details

SUBSEQUENT EVENTS (Details) (USD $)

3 Months Ended

9 Months Ended

0 Months Ended

1 Months Ended

9 Months Ended

3 Months Ended

0 Months Ended

3 Months Ended

9 Months Ended

3 Months Ended

9 Months Ended

0 Months Ended

3 Months Ended

Sep. 30, 2014

Sep. 30, 2014

Nov. 05, 2014

Aug. 04, 2014

Feb. 28, 2014

Sep. 30, 2014

Sep. 30, 2014

Jun. 30, 2014

Mar. 31, 2014

Dec. 31, 2013

Sep. 30, 2013

Jun. 30, 2013

Mar. 31, 2013

Dec. 31, 2012

Aug. 04, 2014

Oct. 23, 2014

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Aug. 04, 2014

Sep. 30, 2014

Mar. 13, 2014

Mar. 27, 2013

Nov. 07, 2012

Aug. 04, 2014

Nov. 07, 2012

Aug. 04, 2014

director

General Partner interest [Member]

General Partner interest [Member]

General Partner interest [Member]

Cash

Cash

Cash

Cash

Cash

Cash

Cash

Cash

Subsequent Event [Member]

Subsequent Event [Member]

Series A convertible preferred units

Series A convertible preferred units

Series A convertible preferred units

Maximum [Member]

Class B Convertible Units [Member]

Class B Convertible Units [Member]

Senior Secured Credit Facility [Member]

Senior Secured Credit Facility [Member]

Senior Secured Credit Facility [Member]

Senior Secured Credit Facility [Member]

Senior Secured Credit Facility [Member]

Letter of Credit [Member]

Letter of Credit [Member]

Pipelines [Member]

General Partner interest [Member]

Cash

General Partner interest [Member]

Cash

Subsequent events

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Distribution Made to Member or Limited Partner Unit Distributions Per Unit

'

'

'

'

'

'

$0.33

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Distribution Made to Member or Limited Partner Distribution Period

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'45 days

'

'

'

'

'

'

'

'

'

'

Distribution per common and subordinated unit (in dollars per unit)

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

$0.40

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

$100,000,000

General Partners' Capital Account, Units Outstanding

'

'

'

'

'

1,033,626

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Entity Common Stock, Shares Outstanding

'

'

23,800,943

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

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

'

'

'

'

2.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Ownership interest held by general partners (as a percent)

'

2.00%

'

100.00%

'

2.00%

'

'

'

'

'

'

'

'

2.00%

'

'

'

2.00%

'

'

'

'

'

'

'

'

'

'

'

Number of directors

'

3

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Preferred unit Conversion Common Units Exchange Ratio on Satisfaction of Specified Condition

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

110.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

Line of Credit Facility, Maximum Borrowing Capacity

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

$350,000,000

$250,000,000

$350,000,000

$75,000,000

$75,000,000

'

Debt Instrument Leverage Ratio

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

4.5

5.75

'

'

'

'

'

'

Distribution Made to Member or Limited Partner Minimum Quarterly Distributions Declared Per Unit

$0.40

$0.40

'

'

'

'

$0.40

$0.40

$0.40

$0.40

$0.40

$0.40

$0.40

$0.40

'

'

'

$0.40

'

'

$0.33

$0.44

'

'

'

'

'

'

'

'

SUPPLEMENTAL_INFORMATION_Detai

SUPPLEMENTAL INFORMATION (Details) (USD $)

0 Months Ended

3 Months Ended

9 Months Ended

9 Months Ended

Mar. 08, 2014

Mar. 06, 2014

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2014

Sep. 30, 2013

Dec. 31, 2013

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2014

Aug. 04, 2014

Dec. 31, 2013

plant

Natural Gas Pipeline Contracts [Member]

Series A convertible preferred units

Series A convertible preferred units

TexStar Rich Gas System [Member]

TexStar Rich Gas System [Member]

TexStar Rich Gas System [Member]

Operating Leased Assets [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

Write-off of Deferred Financing Costs

'

'

'

'

$2,300,000

'

'

'

'

'

'

'

'

Supplemental Disclosures:

'

'

'

'

8,628,000

8,880,000

'

'

'

'

'

'

'

Cash paid for interest, net of amounts capitalized

'

'

'

'

205,000

95,000

'

'

'

'

'

'

'

Supplemental disclosures of non-cash investing and financing activities:

'

'

'

'

23,144,000

34,238,000

'

'

'

'

'

'

'

Accounts payable related to capital expenditures

'

'

'

'

11,000

112,000

'

'

'

'

'

'

'

Capital Lease Obligations Incurred

'

'

100,000

200,000

577,000

1,399,000

'

'

'

'

'

'

'

Noncash Financing Activities, Accrued Distribution on Long Term Incentive Plan

'

'

'

'

-562,000

-191,000

'

'

'

'

'

'

'

Conversion of Stock, Amount Converted

'

'

'

'

-45,624,000

'

'

'

5,130,000

1,255,000

'

'

'

Class B Convertible unit issuance, net

'

'

'

'

324,413,000

0

'

'

'

'

'

'

'

Interest Costs Incurred [Abstract]

'

'

'

'

'

'

'

'

'

'

'

'

'

Total interest costs

'

'

5,529,000

3,887,000

10,826,000

10,035,000

'

'

'

'

'

'

'

Capitalized interest included in property, plant and equipment, net

'

'

-933,000

-300,000

-1,486,000

-1,300,000

'

'

'

'

'

'

'

Interest expense

'

'

4,596,000

3,587,000

9,340,000

8,735,000

'

'

'

'

'

'

'

Deferred Financing Costs [Roll Forward]

'

'

'

'

'

'

'

'

'

'

'

'

'

Deferred financing costs, January 1

'

'

19,357,000

'

19,357,000

'

5,237,000

'

'

'

'

'

'

Capitalization of deferred financing costs

'

'

'

'

17,716,000

'

'

'

'

'

'

'

'

Amortization of deferred financing costs

'

'

'

'

-3,596,000

-947,000

'

'

'

'

'

'

'

Deferred financing costs, September 30

'

'

19,357,000

'

19,357,000

'

5,237,000

'

'

'

'

'

'

Number of power plants

'

2

2

'

2

'

'

'

'

'

'

'

'

Contractual agreement, term

'10 years

'10 years

'

'

'

'

'

'

'

'

'

'

'

Operating leases, future minimum payments due, remainder of current year

'

'

'

'

'

'

'

1,100,000

'

'

'

'

'

Operating leases, future minimum payments due in second year

'

'

'

'

'

'

'

5,600,000

'

'

'

'

'

Operating leases, future minimum payments due in third year

'

'

'

'

'

'

'

5,600,000

'

'

'

'

'

Operating leases, future minimum payments due in fourth year

'

'

'

'

'

'

'

5,600,000

'

'

'

'

'

Operating leases, future minimum payments due in fifth year

'

'

'

'

'

'

'

2,200,000

'

'

'

'

'

Operating leases, future minimum payments due in sixth year

'

'

'

'

'

'

'

2,200,000

'

'

'

'

'

Operating leases, future minimum payments due after sixth year

'

'

'

'

'

'

'

15,300,000

'

'

'

'

'

Contingent fees

'

'

700,000

'

1,500,000

'

'

'

'

'

'

'

'

Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability

'

'

200,000

'

600,000

'

'

'

'

'

'

'

'

Goodwill

'

'

'

'

'

'

'

'

'

'

$99,625,000

$99,625,000

$0

Transactionrelated_costs_Detai

Transaction-related costs (Details) (USD $)	3 Months Ended	9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2014
Business Acquisition [Line Items]	'	'
Business Combination, Acquisition Related Costs	$10.50	$10.80
Severance Costs	0.6	'
Business Acquisition, Transaction Costs	3	3
TexStar Rich Gas System [Member]	'	'
Business Acquisition [Line Items]	'	'
Professional Fees	1.3	'
Onyx Midstream LP & Onyx Pipeline Company [Member]	'	'
Business Acquisition [Line Items]	'	'
Professional Fees	'	0.3
LTIP [Member]	'	'
Business Acquisition [Line Items]	'	'
Share-based Compensation Arrangement by Share-based Payment Award Accelerated Compensation Cost	7.1	'
Equity Equivalent Units [Member]	'	'
Business Acquisition [Line Items]	'	'
Share-based Compensation Arrangement by Share-based Payment Award Accelerated Compensation Cost	$1.50	'

EQUITY_IN_JOINT_VENTURES_Detai

EQUITY IN JOINT VENTURES (Details) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2014	Sep. 30, 2014	Aug. 04, 2014	Aug. 04, 2014	Sep. 30, 2014
	joint_venture		joint_venture		T2 Eagle Ford [Member]	T2 Cogen [Member]	T2 LaSalle [Member]	T2 LaSalle [Member]	T2 Cogen [Member]	T2 Eagle Ford [Member]
number of joint ventures	3	'	3	'	'	'	'	'	'	'
Equity Method Investment Summarized Financial Information, Equity	$148,848	'	$148,848	'	$110,152	$18,994	$19,702	'	'	'
Income (Loss) from Equity Method Investments	-3,308	'	-3,308	'	-1,618	-1,435	-255	'	'	'
Natural Gas Midstream Revenue	211,493	160,629	620,147	459,583	516	410	229	'	'	'
Net Income (Loss) Attributable to Parent	-24,778	-4,069	-29,026	-16,645	-3,234	-2,871	-1,021	'	'	'
Revenues	$205,203	$160,629	$613,857	$459,583	'	'	'	'	'	'
Equity Method Investment, Ownership Percentage	'	'	'	'	'	'	'	25.00%	50.00%	50.00%