Southcross Energy Partners 10-Q 13 Nov 13 2013 Q3 Quarterly report Financial data

Document_and_Entity_Informatio

Document and Entity Information	9 Months Ended
	Sep. 30, 2013	Nov. 13, 2013	Nov. 13, 2013	Nov. 13, 2013	Sep. 30, 2013
		Subordinated Units	Series A preferred unit	Common Units	Common Units
Entity Registrant Name	'Southcross Energy Partners, L.P.	'	'	'	'
Entity Central Index Key	'0001547638	'	'	'	'
Document Type	'10-Q	'	'	'	'
Document Period End Date	30-Sep-13	'	'	'	'
Amendment Flag	'false	'	'	'	'
Current Fiscal Year End Date	'--12-31	'	'	'	'
Entity Current Reporting Status	'Yes	'	'	'	'
Entity Filer Category	'Non-accelerated Filer	'	'	'	'
Entity Common Stock, Shares Outstanding	'	12,213,713	1,739,473	12,267,019	12,222,692
Document Fiscal Year Focus	'2013	'	'	'	'
Document Fiscal Period Focus	'Q3	'	'	'	'

CONDENSED_CONSOLIDATED_BALANCE

CONDENSED CONSOLIDATED BALANCE SHEETS (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Current assets:	'	'
Cash and cash equivalents	$786	$7,490
Trade accounts receivable	52,185	50,994
Prepaid expenses	2,263	1,762
Other current assets	3,551	1,001
Total current assets	58,785	61,247
Property, plant and equipment, net	579,051	550,603
Intangible assets, net	1,582	1,624
Other assets	6,383	5,131
Total assets	645,801	618,605
Current liabilities:	'	'
Accounts payable and accrued liabilities	55,062	96,801
Other current liabilities	5,901	3,586
Total current liabilities	60,963	100,387
Long-term debt	258,500	191,000
Other non-current liabilities	1,618	751
Total liabilities	321,081	292,138
Commitments and contingencies	'	'
Partners' capital:	'	'
Accumulated other comprehensive loss	-287	-477
Total partners' capital	284,631	326,467
Liabilities, preferred units, and partners' capital:	'	'
Total liabilities, preferred units and partners' capital	645,801	618,605
Common Units	'	'
Partners' capital:	'	'
Total partners' capital	173,871	194,365
Subordinated Units	'	'
Partners' capital:	'	'
Total partners' capital	104,457	125,951
General Partner interest	'	'
Partners' capital:	'	'
General Partner interest	6,590	6,628
Total partners' capital	6,590	6,628
Series A convertible preferred units	'	'
Preferred units of Southcross Energy LLC:	'	'
Series A convertible preferred units (1,739,473 units issued and outstanding as of September 30, 2013)	$40,089	$0

CONDENSED_CONSOLIDATED_BALANCE1

CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical)	Sep. 30, 2013	Dec. 31, 2012
Common Units	'	'
Entity Common Stock, Shares Outstanding	12,222,692	'
Partners' capital:	'	'
Limited Partner, units authorized	'	13,963,713
Limited Partner, units issued	12,222,692	12,213,713
Limited Partner, units outstanding	12,222,692	12,213,713
Subordinated Units	'	'
Partners' capital:	'	'
Limited Partner, units authorized	'	12,213,713
Limited Partner, units issued	12,213,713	12,213,713
Limited Partner, units outstanding	12,213,713	12,213,713
Series A convertible preferred units	'	'
Partners' capital:	'	'
Preferred units, units issued	1,739,473	'
Preferred units, units outstanding	1,739,473	'

CONDENSED_CONSOLIDATED_STATEME

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (USD $)	3 Months Ended		9 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Revenues	$160,629	$118,150	$459,583	$344,469
Expenses:	'	'	'	'
Cost of natural gas and liquids sold	135,416	103,073	394,212	289,277
Operations and maintenance	10,896	8,890	31,069	24,469
Depreciation and amortization	9,447	5,522	24,958	12,860
General and administrative	5,227	3,351	16,850	8,987
Total expenses	160,986	120,836	467,089	335,593
(Loss) income from operations	-357	-2,686	-7,506	8,876
Interest expense, net	-3,587	-1,362	-8,735	-4,493
(Loss) income before income tax expense	-3,944	-4,048	-16,241	4,383
Income tax benefit (expense)	-125	7	-404	-249
Net (loss) income	-4,069	-4,041	-16,645	4,134
Net loss attributable to partners	-98	'	-17,900	'
Less deemed dividends on:	'	'	'	'
Net loss attributable to Southcross Energy LLC common unitholders	'	-12,241	'	-15,014
Basic and diluted net (loss) income per unit:	'	'	'	'
Basic and diluted net loss per Southcross Energy LLC common unit (in dollars per share)	'	($10.09)	'	($12.36)
General Partner	'	'	'	'
Expenses:	'	'	'	'
Net (loss) income	'	'	-309	'
Net loss attributable to partners	-81	'	-334	'
Limited Partners	'	'	'	'
Expenses:	'	'	'	'
Net loss attributable to partners	-17	'	-17,566	'
Common Units	'	'	'	'
Expenses:	'	'	'	'
Net (loss) income	'	'	-8,172	'
Net loss attributable to partners	2,323	'	-8,784	'
Less deemed dividends on:	'	'	'	'
Net loss attributable to Southcross Energy LLC common unitholders	'	-12,241	'	-15,014
Basic and diluted net (loss) income per unit:	'	'	'	'
Basic net (loss) income per common unit	$0.19	'	($0.72)	'
Diluted net loss per common unit	($0.14)	'	($0.72)	'
Basic and diluted net loss per subordinated unit	'	($10.09)	'	($12.36)
Subordinated Units	'	'	'	'
Expenses:	'	'	'	'
Net (loss) income	'	'	-8,164	'
Net loss attributable to partners	-2,340	'	-8,782	'
Basic and diluted net (loss) income per unit:	'	'	'	'
Basic and diluted net loss per subordinated unit	($0.19)	'	($0.72)	'
Series A convertible preferred units	'	'	'	'
Expenses:	'	'	'	'
Series A preferred unit in-kind distribution	-696	'	-1,255	'
Series A preferred unit valuation adjustment to maximum redemption value	4,667	'	0	'
Series A convertible preferred units | General Partner	'	'	'	'
Expenses:	'	'	'	'
Series A preferred unit in-kind distribution	'	'	-25	'
Series A convertible preferred units | Common Units	'	'	'	'
Expenses:	'	'	'	'
Series A preferred unit in-kind distribution	341	'	-615	'
Series A preferred unit valuation adjustment to maximum redemption value	-4,667	'	'	'
Series A convertible preferred units | Subordinated Units	'	'	'	'
Expenses:	'	'	'	'
Series A preferred unit in-kind distribution	'	'	-615	'
Redeemable preferred units	'	'	'	'
Less deemed dividends on:	'	'	'	'
Preferred units	'	-820	'	-2,339
Series B redeemable preferred units	'	'	'	'
Less deemed dividends on:	'	'	'	'
Preferred units	'	-2,038	'	-3,822
Series C redeemable preferred units	'	'	'	'
Less deemed dividends on:	'	'	'	'
Preferred units	'	-1,364	'	-1,423
Preferred units	'	'	'	'
Less deemed dividends on:	'	'	'	'
Preferred units	'	($3,978)	'	($11,564)

CONDENSED_CONSOLIDATED_STATEME1

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Statement of Comprehensive Income [Abstract]	'	'	'	'
Net (loss) income	($4,069)	($4,041)	($16,645)	$4,134
Other comprehensive income (loss):	'	'	'	'
Hedging losses reclassified to earnings and recognized in interest expense	108	84	302	169
Adjustment in fair value of derivatives	-82	-379	-112	-728
Total other comprehensive income (loss)	26	-295	190	-559
Comprehensive (loss) income	($4,043)	($4,336)	($16,455)	$3,575

CONDENSED_CONSOLIDATED_STATEME2

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $)	9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012
Cash flows from operating activities:	'	'
Net (loss) income	($16,645)	$4,134
Adjustments to reconcile net (loss) income to net cash provided by operating activities:	'	'
Depreciation and amortization	24,958	12,860
Unit-based compensation	1,645	293
Amortization of deferred financing costs	947	948
Unrealized loss	0	222
Other, net	-63	0
Changes in operating assets and liabilities:	'	'
Trade accounts receivable	-1,191	-2,292
Prepaid expenses and other current assets	-335	-198
Other non-current assets	-60	-1,598
Accounts payable and accrued liabilities	-7,502	-166
Interest payable	0	75
Other liabilities	1,708	784
Net cash provided by operating activities	3,462	15,062
Cash flows from investing activities:	'	'
Capital expenditures	-86,149	-112,450
Expenditures related to repair of Gregory plant fire damage, net of insurance proceeds and deductible	-2,716	0
Other	45	0
Net cash used in investing activities	-88,820	-112,450
Cash flows from financing activities:	'	'
Borrowings under our credit agreements	107,500	88,500
Repayments under our credit agreements	-40,000	-43,618
Payments on capital lease obligations	-398	0
Financing costs	-2,139	-2,513
Distribution to partners	-25,941	0
Net cash provided by financing activities	78,654	99,869
Net (decrease) increase in cash and cash equivalents	-6,704	2,481
Cash and cash equivalents b Beginning of period	7,490	1,412
Cash and cash equivalents b End of period	786	3,893
Supplemental Disclosures:	'	'
Cash paid for interest, net of amounts capitalized	8,880	7,820
Cash paid for taxes, net of refunds received	95	320
General Partner	'	'
Cash flows from operating activities:	'	'
Net (loss) income	-309	'
Cash flows from financing activities:	'	'
Contributions from general partner	800	0
Series A convertible preferred units	'	'
Cash flows from financing activities:	'	'
Proceeds from issuance of Series A convertible preferred units, net of issuance costs	38,832	0
Series B redeemable preferred units	'	'
Cash flows from financing activities:	'	'
Proceeds from issuance of Southcross Energy LLC redeemable preferred units	0	42,800
Series C redeemable preferred units	'	'
Cash flows from financing activities:	'	'
Proceeds from issuance of Southcross Energy LLC redeemable preferred units	0	30,000
Common Units	'	'
Cash flows from financing activities:	'	'
Repurchase and retirement of Southcross Energy LLC common units	$0	($15,300)

CONDENSED_CONSOLIDATED_STATEME3

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

Total

Redeemable preferred units

Series B redeemable preferred units

Series C redeemable preferred units

Preferred units

Series A preferred unit

Common Equity

Accumulated Deficit

Accumulated Deficit

Accumulated Deficit

Accumulated Deficit

Accumulated Deficit

Accumulated Other Comprehensive Loss

Common

Common

Subordinated

Subordinated

General Partner

General Partner

In Thousands, unless otherwise specified

Redeemable preferred units

Series B redeemable preferred units

Series C redeemable preferred units

Preferred units

Series A preferred unit

Series A preferred unit

Series A preferred unit

BALANCE - Members' Equity at Dec. 31, 2011

($10,165)

'

'

'

'

'

$1,473

($11,638)

'

'

'

'

$0

'

'

'

'

'

'

Increase (Decrease) in Shareholders' Equity

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Net (loss) income

4,134

'

'

'

'

'

'

4,134

'

'

'

'

'

'

'

'

'

'

'

Other comprehensive loss

-559

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Deemed dividend on:

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Preferred units

'

-2,339

-3,822

-1,423

-11,564

'

'

'

-2,339

-3,822

-1,423

-11,564

'

'

'

'

'

'

'

Repurchase and retirement of common units

-15,301

'

'

'

'

'

-131

-15,170

'

'

'

'

'

'

'

'

'

'

'

BALANCE - Members' Equity at Sep. 30, 2012

-41,039

'

'

'

'

'

1,342

-41,822

'

'

'

'

'

'

'

'

'

'

'

BALANCE - Partners' Capital at Jun. 30, 2012

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Increase (Decrease) in Shareholders' Equity

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Net (loss) income

-4,041

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Other comprehensive loss

-295

'

'

'

'

'

'

'

'

'

'

'

-559

'

'

'

'

'

'

Deemed dividend on:

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Preferred units

'

-820

-2,038

-1,364

-3,978

'

'

'

'

'

'

'

'

'

'

'

'

'

'

BALANCE - Members' Equity at Sep. 30, 2012

-41,039

'

'

'

'

'

'

'

'

'

'

'

-559

'

'

'

'

'

'

BALANCE - Partners' Capital at Dec. 31, 2012

326,467

'

'

'

'

'

'

'

'

'

'

'

-477

194,365

'

125,951

'

6,628

'

Increase (Decrease) in Shareholders' Equity

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Net (loss) income

-16,645

'

'

'

'

'

'

'

'

'

'

'

'

-8,172

'

-8,164

'

-309

'

Other comprehensive loss

190

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Deemed dividend on:

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Series A preferred unit in-kind distribution

'

'

'

'

'

-1,255

'

'

'

'

'

'

'

'

-615

'

-615

'

-25

Issuance of general partner units

800

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

800

'

Unit-based compensation on long-term incentive plan

1,206

'

'

'

'

'

'

'

'

'

'

'

'

1,206

'

'

'

'

'

Cash distributions paid

-25,941

'

'

'

'

'

'

'

'

'

'

'

'

-12,709

'

-12,703

'

-529

'

Net effect of cash flow hedges

190

'

'

'

'

'

'

'

'

'

'

'

190

'

'

'

'

'

'

Accrued distribution on long-term incentive plan

-191

'

'

'

'

'

'

'

'

'

'

'

'

-191

'

'

'

'

'

BALANCE - Partners' Capital at Sep. 30, 2013

$284,631

'

'

'

'

'

'

'

'

'

'

'

($287)

$173,871

'

$104,457

'

$6,590

'

ORGANIZATION_AND_DESCRIPTION_O

ORGANIZATION AND DESCRIPTION OF BUSINESS	9 Months Ended
	Sep. 30, 2013
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,” “we,” “our” or “us”) is a Delaware limited partnership formed in April 2012 to own, operate, develop and acquire midstream energy assets. Our common units are listed on the New York Stock Exchange (“NYSE”) under the symbol “SXE.”
	Southcross Energy LLC was formed in 2009 and is our predecessor. In connection with our initial public offering of common units (“IPO”) on November 7, 2012, Southcross Energy LLC contributed all of its operating subsidiaries (its net assets on a historical cost basis), excluding certain liabilities and all preferred units, and became our holding company. Southcross Energy LLC holds 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 outstanding and our Series A Convertible Preferred Units (“Series A Preferred Units”) originally issued during the second quarter of 2013 (See Note 11). Southcross Energy LLC is controlled through investment funds and entities associated with Charlesbank Capital Partners, LLC (“Charlesbank”). There was no change in the basis of accounting as a result of the IPO and the contributed net assets of Southcross Energy LLC.
	The condensed consolidated financial statements reflect our financial position, results of operations and cash flows beginning November 7, 2012 and those of Southcross Energy LLC for the reported periods ended before November 7, 2012.
	See our 2012 Annual Report on Form 10-K for more information related to our organization.
	Description of Business
	We are a midstream natural gas company with operations in South Texas, Mississippi and Alabama. We operate as one reportable segment and provide, through our subsidiaries, 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 network of pipelines connects supplies of natural gas to our customers, which include industrial, commercial and power generation customers and local distribution companies.

BASIS_OF_PRESENTATION_AND_SUMM

BASIS OF PRESENTATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES	9 Months Ended
	Sep. 30, 2013
Accounting Policies [Abstract]	'
BASIS OF PRESENTATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES	'
	BASIS OF PRESENTATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
	Basis of Presentation
	We prepared this Quarterly Report on Form 10-Q (this “report”) under the rules and regulations of the Securities and Exchange Commission (“SEC”) 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 2012 Annual Report on Form 10-K. The condensed consolidated financial statements as of September 30, 2013, and for the three and nine months ended September 30, 2013 and 2012, are unaudited.  All intercompany accounts and transactions have been eliminated in the preparation of the accompanying condensed consolidated financial statements.
	In management’s opinion, the accompanying unaudited condensed consolidated financial statements include all adjustments, consisting of normal recurring accruals and estimates necessary for the fair presentation of the results of operations for the periods presented.  Actual results could 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 2012 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 herein.
	Significant Accounting Policies
	During the third quarter of 2013, there were no material changes to our significant accounting policies described in Note 2 of our 2012 Annual Report on Form 10-K.
	Recent Accounting Pronouncements
	Accounting standard-setting organizations frequently issue new or revised accounting rules. We regularly review new pronouncements to determine their impact, if any, on our consolidated financial statements, and currently there are no new accounting pronouncements that would have a material impact.

NET_LOSS_PER_LIMITED_PARTNER_U

NET LOSS PER LIMITED PARTNER UNIT AND DISTRIBUTIONS	9 Months Ended
	Sep. 30, 2013
Earnings Per Share [Abstract]	'
NET LOSS PER LIMITED PARTNER UNIT AND DISTRIBUTIONS	'
	NET (LOSS) INCOME PER LIMITED PARTNER UNIT AND DISTRIBUTIONS
	Net (Loss) Income 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, 2013 (in thousands, except unit and per unit data):
			Three Months Ended September 30, 2013				Nine Months Ended September 30, 2013
	Net loss		$	(4,069	)		$	(16,645	)
	Series A Preferred Unit distribution		(696		)		(1,255		)
	Series A Preferred Unit valuation adjustment to maximum redemption value (1)		4,667				—
	Net loss attributable to partners		$	(98	)		$	(17,900	)
	General partner’s interest		$	(81	)		$	(334	)
	Limited partners’ interest:
	Common (1)		$	2,323			$	(8,784	)
	Subordinated		$	(2,340	)		$	(8,782	)
	Common Units		Three Months Ended September 30, 2013				Nine Months Ended September 30, 2013
	Interest in net (loss) income		$	2,323			$	(8,784	)
	Effect of dilutive units - numerator:
	Series A Preferred Unit distribution		341				—
	Series A Preferred Unit valuation adjustment to maximum redemption value (1)		(4,667		)		—
	Dilutive interest in net loss		$	(2,003	)		$	(8,784	)
	Weighted-average units - basic		12,222,692				12,219,699
	Effect of dilutive units - denominator (2):
	Series A Preferred Units		1,739,473				—
	Awards granted under long-term incentive plan		27,972				—
	Weighted-average units - dilutive		13,990,137				12,219,699
	Basic earnings per unit:
	Net (loss) income per unit		$	0.19			$	(0.72	)
	Dilutive earnings per unit:
	Net loss per unit		$	(0.14	)		$	(0.72	)
	Subordinated Units		Three Months Ended September 30, 2013				Nine Months Ended September 30, 2013
	Interest in net loss		$	(2,340	)		$	(8,782	)
	Weighted-average units - basic		12,213,713				12,213,713
	Effect of dilutive units (2)		—				—
	Weighted-average units - dilutive		12,213,713				12,213,713
	Basic and diluted net loss per subordinated unit		$	(0.19	)		$	(0.72	)
	(1) The valuation adjustment to maximum redemption value of the Series A Preferred Units as of September 30, 2013 increased income available to common units in the calculation of earnings per unit (See Note 11) for the three months ended September 30, 2013. There is no valuation adjustment to maximum redemption value for the Series A Preferred Units as of September 30, 2013 in the calculation of earnings per unit (See Note 11) for the nine months ended September 30, 2013.
	(2) Because we had a net loss for the nine months ended September 30, 2013 for the common units 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. 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 (See Note 13) and 1,739,473 Series A Preferred Units (See Note 11) 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 long-term incentive plan, 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.
	Distributions
	Our Second Amended and Restated Agreement of Limited Partnership (“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.  Currently, our Amended Credit Facility (see Note 5) restricts distributions to our unitholders to our established minimum quarterly distribution of $0.40 per unit until the Target Leverage Ratio (see Note 5) has been met.
	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 the second amendment to our $350.0 million senior secured credit facility with Wells Fargo Bank, N.A., as administrative agent, and a syndicate of lenders (“Credit Facility”) (See Note 5 and Note 11). Under the terms of our Partnership Agreement, we are 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 we have given notice under the Credit Facility that we have achieved the Target Leverage Ratio (See Note 5) and after the board of directors of our General Partner determines to begin paying quarterly distributions in cash.  In-kind distributions will be 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) or, beginning after four full quarters, such higher per unit rate as is paid in respect to our common units. Cash distributions will equal the greater of $0.40 per unit per quarter or the quarterly distribution paid with respect to each common unit.
	The Series A Preferred Units are considered participating securities for purposes of the basic earnings per unit calculation during periods in which they receive cash distributions.  As we are required to pay in-kind distributions for the first four full quarters and continuing until the Target Leverage Option (See Note 5) has been achieved, the Series A Preferred Units have been excluded from the basic earnings per unit calculation for the three and nine months ended September 30, 2013.
	The following table represents the paid in-kind (“PIK”) distribution for the period ended June 30, 2013 and the PIK distribution earned for the period ended September 30, 2013 (in thousands, except per unit and in-kind distribution units):
	Payment Date		Attributable to the Quarter Ended		Per Unit Distribution						In-Kind Series A			In-Kind				In-Kind		In-Kind General Partner Distribution Value(3)
											Preferred Unit			Series A				Unit
											Distributions			Preferred				Distribution
											to Series A			Distributions				to General
											Preferred			Value(3)				Partner
											Holders
	2013
	14-Nov-13		30-Sep-13		$	0.4					30,439			$	696			621		$	14
	14-Aug-13		30-Jun-13		0.35				-1		22,276			509				455		10
	14-Aug-13		30-Jun-13		0.2				-2		2,199			50				45		1
	(1) 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.
	(2) 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.
	(3) The value was calculated based on the Series A Preferred Units issue price of $22.86 as stated in our Partnership Agreement, multiplied by the number of units distributed.
	Common Units
	The following table represents our distribution declared for the period ended September 30, 2013 and distributions paid for the periods ended June 30, 2013, March 31, 2013 and December 31, 2012 (in thousands, except per unit data):
												Distributions
			Attributable to the		Per Unit							Limited Partners
	Payment Date		Quarter Ended		Distribution							Common				Subordinated			General Partner			Total
	2013
	14-Nov-13		30-Sep-13		$	0.4						$	4,888			$	4,885		$	214		$	9,987
	14-Aug-13		30-Jun-13		0.35				(1	)		—				—			10			10
	14-Aug-13		30-Jun-13		0.2				(2	)		—				—			1			1
14-Aug-13		30-Jun-13		0.4							4,890				4,886			199			9,975
15-May-13		31-Mar-13		0.4							4,888				4,886			199			9,973
2012
February 14, 2013		December 31, 2012		0.24				(3	)		2,931				2,931			120			5,982
(1) 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 29,925 general partner units on April 12, 2013.
(2) 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 5,075 general partner units on May 15, 2013.
(3) 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 IPO on November 7, 2012.
Earnings Per Common Unit of Southcross Energy LLC
The following is a reconciliation of net income per common unit used in the basic and diluted earnings per unit calculations for the three and nine months ended September 30, 2012 (in thousands, except unit and per unit data):
	Three Months Ended September 30, 2012				Nine Months Ended September 30, 2012
Net loss attributable to Southcross Energy LLC common unitholders	$	(12,241	)		$	(15,014	)
Weighted-average common units outstanding - basic	1,213,496				1,214,321
Effect of unvested common units	129,210				165,276
Weighted-average common units outstanding - diluted	$	1,342,706			$	1,379,597
Basic and diluted net loss per Southcross Energy LLC common unit	$	(10.09	)		$	(12.36	)
Southcross Energy LLC calculated earnings per common unit by first deducting the amount of cumulative returns on both the redeemable preferred and preferred units from net income (loss), and dividing this amount by the weighted average number of vested common units (including both the vested Class A common units and Class B units).  The weighted average number of unvested units that would be included in the computation of diluted earnings per unit was 129,210 and 165,276 units for the three and nine months ended September 30, 2012, respectively.  Because we had a net loss for the three and nine months ended September 30, 2012, the unvested units were anti-dilutive.  Therefore, the weighted average units outstanding are the same for basic and diluted net loss per common unit.

FINANCIAL_INSTRUMENTS

FINANCIAL INSTRUMENTS	9 Months Ended
	Sep. 30, 2013
Investments, All Other Investments [Abstract]	'
FINANCIAL INSTRUMENTS	'
	FINANCIAL INSTRUMENTS
	Cash and Cash Equivalents, Accounts Receivable and Accounts Payable
	As of September 30, 2013 and December 31, 2012, 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.
	Credit Facility
	The fair value of the debt funded through our Credit Facility executed in 2012 approximates its carrying amount as of September 30, 2013 due primarily to the variable nature of the interest rate of the instrument and given the limited changes in the interest rate environment since its origination on November 7, 2012. The fair value of the debt is considered a Level 2 fair value measurement.
	Derivatives
	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 has a notional value of $150.0 million, and a maturity date of June 30, 2014. We receive a floating rate based upon one-month LIBOR and pay a fixed rate under the interest rate swap of 0.54%.  As of September 30, 2013 and December 31, 2012, the current portion of the interest rate swap liability of $0.4 million and $0.3 million, respectively, was included within other current liabilities.  As of December 31, 2012, the non-current portion of the interest rate swap liability of $0.3 million was included within other non-current liabilities.  As of September 30, 2013, there was no non-current portion of the interest rate swap liability.
	The fair value of the interest rate swap liabilities were as follows (in thousands):
		Fair value measurement as of
		30-Sep-13			31-Dec-12
		Significant Other Observable Inputs (Level 2)
	Interest rate swap liabilities	$	368		$	638
	The interest rate swap is designated as a cash flow hedge for accounting purposes and, thus, to the extent the cash flow hedge is effective, unrealized gains and losses are recorded to accumulated other comprehensive gain/(loss) and recognized in interest expense as the underlying hedged transactions (interest payments) are recorded. Any hedge ineffectiveness is recognized in interest expense immediately. We did not have any hedge ineffectiveness during the three and nine months ended September 30, 2013 and 2012.
	The effect of the interest rate swap designated as a cash flow hedge in our statements of changes in partners’ capital and members’ equity and comprehensive income/(loss) were as follows (in thousands):
		Three Months Ended September 30,						Nine Months Ended September 30,
		2013			2012			2013			2012
	Change in value recognized in other comprehensive loss - effective portion	$	(82	)	$	(379	)	$	(112	)	$	(728	)
	Loss reclassified from accumulated other comprehensive loss to interest expense	$	108		$	84		$	302		$	169
	Based on current interest rates, we estimate that approximately $0.4 million of hedging losses related to the interest rate swap contract will be reclassified from accumulated other comprehensive income/(loss) to interest expense within the next 12 months.
	On an ongoing basis, a derivative instrument designated as a cash flow hedge must be highly effective in offsetting changes in cash flows of the hedged item.  If it is determined that the derivative instrument is not highly effective as a hedge, hedge accounting will be discontinued prospectively. Changes in fair value of the associated hedging instrument are then recognized immediately in earnings for the remainder of the contract term unless a new hedging relationship is designated.  The assessment of effectiveness excludes counterparty default risk and our own non-performance risk. The effect of these valuation adjustments was immaterial for the three and nine months ended September 30, 2013 and 2012, respectively.
	If it becomes probable that a forecasted transaction (future interest payments) will not occur by the end of the originally specified time period, hedge accounting will be discontinued and the related deferred gains or losses will be recognized in our results of operations immediately. 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 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,
		2013			2012			2013			2012
	Unrealized loss on interest rate cap	$	—		$	—		$	—		$	222
	Realized loss on interest rate cap	$	27		$	—		$	81		$	—
	Commodity Swaps
	In our normal course of business, periodically we enter into month-ahead swap contracts to hedge our exposure to certain intra-month natural gas index pricing risk. The total volume of outstanding month ahead swap contracts as of September 30, 2013 was 25,000 MMBtu per day.  We had no outstanding month-ahead swap contracts as of December 31, 2012.  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.  The fair value of such contracts was immaterial as of September 30, 2013.
	The realized 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,
		2013			2012			2013			2012
	Realized gain/(loss) on derivatives	$	(93	)	$	144		$	(149	)	$	105

LONGTERM_DEBT

LONG-TERM DEBT	9 Months Ended
	Sep. 30, 2013
Debt Disclosure [Abstract]	'
LONG-TERM DEBT	'
	LONG-TERM DEBT
	Credit Facility
	In connection with the closing of the IPO, we entered into the Credit Facility and utilized it to fund fees and expenses incurred in connection with the IPO and for the repayment of a portion of Southcross Energy LLC’s debt under its amended and restated credit agreement.
	We may utilize the Credit Facility for working capital requirements and capital expenditures, the purchase of assets, the payment of distributions and other general purposes within the limitations established by the Second Amendment (as defined and described below). The Credit Facility matures on November 7, 2017, the fifth anniversary of the IPO closing date.
	Amended Credit Facility
	On March 27, 2013, we entered into the first amendment (the “First Amendment”) to the Credit Facility. As a result of the First Amendment, our available credit 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 (the “Collateral Account”) and letters of credit outstanding. Amounts on deposit in the Collateral Account are pledged as collateral to the Credit Facility. Pursuant to the First Amendment, we were allowed to pay our quarterly cash distribution of available cash for the first quarter of 2013 regardless of whether we met certain financial covenants for the period ending March 31, 2013. Because the First Amendment did not modify our requirement to meet the financial covenants under the Credit Facility beginning March 31, 2013, and because we believed it was unlikely that we would be in compliance with our financial covenants for the quarter ending March 31, 2013, we further amended our Credit Facility as discussed below.  In connection with the First Amendment, we incurred $0.6 million in fees, which have been deferred and are being amortized over the remaining life of the Credit Facility.
	On April 12, 2013, we entered into the limited waiver and second amendment (the “Second Amendment”) to the Credit Facility (as amended by the First Amendment and the Second Amendment, the “Amended Credit Facility”), which waived our defaults relating to financial covenants in the Credit Facility for the period ended March 31, 2013 and provided more favorable financial covenants until we give notice under the Amended Credit Facility that we have achieved a consolidated total leverage ratio (the “Target Leverage Ratio”) of 4.25 to 1.00 for one quarter or 4.50 to 1.00 for two consecutive quarters, calculated excluding the benefit of cash on deposit in the Collateral Account and any equity cure amounts (the “Target Leverage Test”). The Target Leverage Test is not a required calculation under the Second Amendment, and can be calculated and elected at our option (the “Target Leverage Option”). Our available credit, excluding our letters of credit, continues to be subject to the availability limits described in the First Amendment.  In connection with the Second Amendment, we incurred $1.5 million in fees, which have been deferred and are being amortized over the remaining life of the Credit Facility.
	As a condition to the Second Amendment, Southcross Energy LLC and our General Partner deposited $34.2 million into the Collateral Account. The $34.2 million was then utilized to purchase Series A Preferred Units as described below.  Additionally, Southcross Energy LLC and our General Partner agreed to deposit into the Collateral Account proceeds received from cash distributions on our common units and subordinated units that they own and that are attributable to each calendar quarter in 2013.  On May 15, 2013, Southcross Energy LLC and our General Partner deposited their first quarter cash distribution of $5.8 million into the Collateral Account.
	The Second Amendment provides for, among other things, the following:
	•	an increase in our letters of credit sublimit to $50.0 million;
	•	until we achieve the Target Leverage Ratio:
	•	an increase in our interest rate to be LIBOR plus 4.50% (after achieving the Target Leverage Ratio our interest rate reverts to the original pricing grid of not more than LIBOR plus 3.25%);
	•	a limit to our growth capital expenditures of $25.0 million for the last three quarters of 2013 and an additional $25.0 million for the subsequent 18-months ending June 30, 2015 (provided that if additional cash, as required under the Second Amendment, is placed in the Collateral Account, such expenditures may be increased to $28.0 million for the remaining three quarters of 2013 and the subsequent 18-months ending June 30, 2015);
	•	distributions to our unitholders are effectively limited to our established minimum quarterly distribution of $0.40 per unit; and
	•	our ability to make acquisitions is limited; and
	•	once we achieve the Target Leverage Ratio, we have the option to revert the Amended Credit Facility back to the terms of our original Credit Facility.
	Pursuant to the Second Amendment, during the second quarter of 2013, our General Partner and Southcross Energy LLC made an equity investment in us in an aggregate amount equal to $40.0 million in exchange for 35,000 General Partner units and 1,715,000 Series A Preferred Units, respectively, which distributions on such securities are required to be paid-in kind for the first four full quarters following the issuance of the units and until the Target Leverage Test has been satisfied. Our total capital infusion of $40.0 million from all sales of Series A Preferred Units and General Partner contributions (See Note 11) was used to reduce borrowings under our Amended Credit Facility.
	The Amended Credit Facility provides that if we fail to comply with the financial covenants of the Amended Credit Facility for the calendar quarters ending on or before December 31, 2013, we have the right (which cannot be exercised more than two times) to cure the failure to comply by having Southcross Energy LLC and/or our General Partner deposit into the Collateral Account the amount required to cure as determined by the Second Amendment.
	For the quarter ended June 30, 2013, the Second Amendment required us to have Consolidated EBITDA (as defined in the Credit Facility) of at least $9.0 million, and we were not subject to the Adjusted Consolidated Total Leverage Ratio (as defined in the Credit Facility) for such quarter.  As a result of our not meeting the Consolidated EBITDA covenant for the quarter ended June 30, 2013 we utilized our right to cure and Southcross Energy LLC deposited approximately $2.7 million into the Collateral Account on August 6, 2013, which was earlier than the date required under the Second Amendment.
	For the quarter ended September 30, 2013, the Second Amendment requires us to have an Adjusted Consolidated Total Leverage Ratio not to exceed 7.25 to 1.00. Our Adjusted Consolidated Total Leverage Ratio for the quarter ended September 30, 2013 was approximately 6.5 to 1.00. We will not need to utilize our right to cure for the quarter ended September 30, 2013. For the fourth quarter of 2013, we have one additional right to cure.
	Our ability to fund expansion projects while the Amended Credit Facility is in effect is limited to $25.0 million during the second through fourth quarters of 2013 and an additional $25.0 million in the subsequent 18-month period ending June 30, 2015, which can be increased to $28.0 million in each period if additional funds are placed into the Collateral Account. In October 2013, Southcross Energy LLC deposited an additional $3.0 million into the Collateral Account increasing our limit for 2013 expansion projects to $28.0 million.
	The Second Amendment provides that until we satisfy the Target Leverage Ratio, we are allowed to calculate an Adjusted Consolidated Total Leverage Ratio, which allows for the netting of our Consolidated Total Funded Indebtedness (as defined in the Credit Facility) with amounts on deposit in the Collateral Account, and our Adjusted Consolidated Total Leverage Ratio is not to exceed the ratios set forth below for the corresponding periods:
			Maximum Adjusted
			Consolidated
			Total Leverage Ratio
	September 30, 2013		7.25 to 1.00
	December 31, 2013		6.75 to 1.00
	March 31, 2014		6.25 to 1.00
	June 30, 2014		5.25 to 1.00
	September 30, 2014		5.00 to 1.00
	December 31, 2014		4.75 to 1.00
	March 31, 2015 and thereafter		4.50 to 1.00
	If we fail to meet the Target Leverage Test by June 30, 2014, all or a portion of the cash distributions we make to Southcross Energy LLC and our General Partner for the quarters ending June 30, 2013, September 30, 2013 and December 31, 2013 will be invested in us as additional paid-in kind equity securities until the Target Leverage Test has been satisfied. If, as of June 30, 2014, the Target Leverage Test is met, any funds then on deposit in the Collateral Account (other than equity cure amounts and amounts deposited in the Collateral Account to allow us to increase the amount of our capital expenditures) will be released to Southcross Energy LLC and our General Partner.
	The Second Amendment provides that upon satisfying the Target Leverage Ratio we will not permit our Maximum Consolidated Total Leverage Ratio to exceed the ratio set forth below for the corresponding period:
			Maximum Consolidated
			Total Leverage Ratio
	September 30, 2013		4.75 to 1.00
	December 31, 2013 and thereafter		4.50 to 1.00
	As of September 30, 2013, we have not satisfied the Target Leverage Ratio, therefore the Maximum Consolidated Total Leverage Ratio is not applicable.
	The Second Amendment changed the minimum Consolidated Interest Coverage Ratio (as provided in the Amended Credit Facility) to 2.25 to 1.00 for the quarters ending September 30, 2013 and December 31, 2013 and 2.50 to 1.00 for the quarters ending March 31, 2014 and thereafter. For the quarter ended September 30, 2013, our consolidated interest coverage ratio was approximately 2.8.
	Borrowings under the Amended Credit Facility bear interest at LIBOR plus an applicable margin or a base rate as defined in the respective credit agreements. Under the terms of the Amended Credit Facility, the applicable margin under LIBOR borrowings was 4.50% at September 30, 2013. The weighted-average interest rate for the three and nine months ended September 30, 2013 was 4.80% and 4.33%, respectively.
	Under our Amended Credit Facility, we have the ability to borrow $250.0 million plus an amount equal to the funds deposited into the Collateral Account and letters of credit outstanding. As of September 30, 2013, cash on deposit in the Collateral Account was $8.5 million. As of September 30, 2013, our borrowings under the Amended Credit Facility were $258.5 million, and our remaining available capacity under the Amended Credit Facility was $28.7 thousand. As of September 30, 2013, Southcross Energy LLC had $33.1 million of cash which has been made available for deposit into the Collateral Account to support subsequent additional borrowings. For the three and nine months ended September 30, 2013 our average outstanding borrowings were $254.2 million and $238.9 million, respectively, and for the three and nine months ended September 30, 2013 our maximum outstanding borrowings were $258.5 million.

PROPERTY_PLANT_AND_EQUIPMENT

PROPERTY, PLANT AND EQUIPMENT	9 Months Ended
	Sep. 30, 2013
Property, Plant and Equipment [Abstract]	'
PROPERTY, PLANT AND EQUIPMENT	'
	PROPERTY, PLANT AND EQUIPMENT
	Property, plant and equipment consisted of the following (in thousands):
		Estimated	30-Sep-13			31-Dec-12
		Useful Life (yrs)
	Pipelines	30	$	339,925		$	250,177
	Gas processing, treating and other plants	15	243,891			221,594
	Compressors	7	20,030			19,241
	Rights of way and easements	15	20,729			20,729
	Furniture, fixtures and equipment	5	3,293			3,087
	Capital lease vehicles	5-Mar	1,399			—
	Total property, plant and equipment		629,267			514,828
	Accumulated depreciation and amortization		(71,282		)	(46,466		)
	Total		557,985			468,362
	Construction in progress		15,758			77,011
	Land and other		5,308			5,230
	Property, plant and equipment, net		$	579,051		$	550,603
	Depreciation is provided using the straight-line method based on the estimated useful life of each asset.  Depreciation expense for the three and nine months ended September 30, 2013 was $9.4 million and $25.0 million, respectively, including $1.3 million in accelerated depreciation during the three months ended September 30, 2013 for the planned abandonment at one of our compressor stations. Depreciation expense for the three and nine months ended September 30, 2012 was $5.5 million and $12.9 million, respectively.
	Costs related to projects under construction, including interest on funds borrowed to finance the construction of facilities, are capitalized as construction in progress.  For the three and nine months ended September 30, 2013, we capitalized interest of $0.3 million and $1.3 million, respectively.  For the three and nine months ended September 30, 2012, we capitalized interest of $2.2 million and $4.5 million, respectively.
	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, we spent approximately $3.9 million to return the plant to service and filed an insurance claim related to these costs.  We recovered $1.0 million from insurance for this loss during the second quarter of 2013 and believe it is probable that we will recover the remaining costs, less a $0.3 million deductible, under our insurance policies.

OTHER_ASSETS

OTHER ASSETS	9 Months Ended
	Sep. 30, 2013
Other Assets, Noncurrent Disclosure [Abstract]	'
OTHER ASSETS	'
	OTHER ASSETS
	Other assets consisted of the following (in thousands):
		30-Sep-13		31-Dec-12
	Deferred financing costs	$	5,577	$	4,385
	Prepaid expenses	605		551
	Other	201		195
	Total other assets	$	6,383	$	5,131
	We incurred 2.1 million in costs in connection with the First Amendment and Second Amendment entered into during the nine months ended September 30, 2013.  We incurred $5.2 million in costs as a result of entering into amendments to our (and our predecessor’s) credit agreements during the nine months ended September 30, 2012.
	Deferred financing costs are amortized over the life of the Credit Facility.  Amortization of deferred financing costs recorded in interest expense were as follows (in thousands):
		Three months ended September 30,				Nine months ended September 30,
		2013		2012		2013		2012
	Amortization of deferred financing costs	$	345	$	322	$	947	$	948

ACCOUNTS_PAYABLE_AND_ACCRUED_L

ACCOUNTS PAYABLE AND ACCRUED LIABILITIES	9 Months Ended
	Sep. 30, 2013
Payables and Accruals [Abstract]	'
ACCOUNTS PAYABLE AND ACCRUED LIABILITIES	'
	ACCOUNTS PAYABLE AND ACCRUED LIABILITIES
	Trade accounts payable as of September 30, 2013 and December 31, 2012 included $6.5 million and $40.7 million, respectively, related to capital expenditures. These amounts have been reflected as non-cash investing activities within the condensed consolidated statements of cash flows.

COMMITMENTS_AND_CONTINGENCIES

COMMITMENTS AND CONTINGENCIES	9 Months Ended
	Sep. 30, 2013
Commitments and Contingencies Disclosure [Abstract]	'
COMMITMENTS AND CONTINGENCIES	'
	COMMITMENTS AND CONTINGENCIES
	Legal Matters
	On March 5, 2013, our subsidiary 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, later, Formosa filed a counterclaim against our subsidiary claiming our affiliate breached the gas processing and sales contract and a related agreement between the parties for the supply by Formosa of residue gas to a third party on behalf of our subsidiary. We believe the counterclaims are without merit and our subsidiary will defend itself vigorously against the counterclaims while continuing to pursue its own claims. 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. There currently are no such pending proceedings to which we are a party that our management believes 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.
	Capital Leases
	We have auto leases classified as capital leases that are recorded in other current liabilities and other non-current liabilities in our consolidated balance sheet as of September 30, 2013. The lease termination dates of the agreements vary from 2013 until 2017. 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. We had no capital leases during 2012. Future minimum annual rental commitments under our capital leases as of September 30, 2013, were as follows (in thousands):
	Fiscal Year	Capital Leases
	2013 (remaining)	$	144
	2014	516
	2015	291
	2016	99
	2017	28
	Total future payments	1,078
	Less: Imputed interest	(46		)
	Future lease payments	$	1,032
	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 activities.  These leases include those for office and other operating facilities and equipment.  The lease termination dates of the agreements vary from 2013 to 2017.  Future minimum annual rental commitments under our operating leases as of September 30, 2013 were as follows (in thousands):
	Fiscal Year	Operating Leases
	2013 (remaining)	$	150
	2014	578
	2015	539
	2016	436
	2017	294
	Future lease payments	$	1,997
	Expenses associated with operating leases were $0.4 million and $1.1 million for the three and nine months ended September 30, 2013, respectively.  Expenses associated with operating leases were $0.6 million and $1.6 million for the three and nine months ended September 30, 2012, respectively.
	Purchase Commitments
	At September 30, 2013, we had commitments of approximately $1.6 million to purchase equipment related to our capital projects.

TRANSACTIONS_WITH_RELATED_PART

TRANSACTIONS WITH RELATED PARTIES	9 Months Ended
	Sep. 30, 2013
Related Party Transactions [Abstract]	'
TRANSACTIONS WITH RELATED PARTIES	'
	TRANSACTIONS WITH RELATED PARTIES
	Charlesbank
	Before our IPO, Charlesbank provided certain management services to Southcross Energy LLC pursuant to a management services agreement (the “Charlesbank Agreement”) that specified an annual management fee of $0.6 million. Southcross Energy LLC received services under the Charlesbank Agreement until the IPO. Concurrently with the IPO, the Charlesbank Agreement was terminated and we did not incur management fees thereafter.  For the three and nine months ended September 30, 2012, Southcross Energy LLC incurred management fees of $0.2 million and $0.5 million, respectively, for services received under the Charlesbank Agreement.
	The current board of directors of our General Partner includes three persons affiliated with Charlesbank and three outside directors. All of these directors are compensated equally for similar responsibilities and reimbursed for expenses incurred for their services to us. For the three and nine months ended September 30, 2013, we paid fees related to the Charlesbank director services of $0.1 million and $0.4 million, respectively, which are reflected in general and administrative expenses in our consolidated statements of operations.
	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.  During the three and nine months ended September 30, 2013, we incurred expenses of $6.8 million and $18.9 million, respectively, related to these reimbursements, which are reflected in operating expenses in our consolidated statements of operations.
	The reimbursement of our compensation expenses to our General Partner began on January 1, 2013 in accordance with our Partnership Agreement.
	During the second quarter of 2013, to satisfy our requirements under our Amended Credit Facility, we entered into a Purchase Agreement (as defined below) with Southcross Energy LLC, pursuant to which 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 (See Note 11).  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. Southcross Energy LLC currently holds 218,068 Series A Preferred Units.  See Note 5 for discussion of the Collateral Account held by our General Partner. See Note 5 for discussion of the Collateral Account held by our General Partner and cash made available for deposit by Southcross Energy LLC.

SERIES_A_PREFERRED_UNITS

SERIES A PREFERRED UNITS	9 Months Ended
	Sep. 30, 2013
Preferred Units Description and Other Disclosures [Abstract]	'
SERIES A PREFERRED UNITS	'
	SERIES A 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.
	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 Amended Credit Facility (See Note 5). The Private Placement of Series A Preferred Units 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.
	Applicable accounting guidance related to the Series A Preferred Units requires that equity instruments with redemption features that are redeemable at the option of the holder be classified outside of permanent equity.  The change of control rights associated with the Series A Preferred Units requires the units to be classified outside of permanent equity.  The Series A Preferred Units were adjusted to maximum redemption value as of June 30, 2013 as the maximum redemption value, calculated in accordance with the change of control rights provision of our Partnership Agreement, was greater than the fair value of the units at issuance. The Series A Preferred Units have been adjusted to the fair value at issuance as of September 30, 2013 because the maximum redemption value is currently less than the fair value of the units at issuance.  The decrease in the valuation adjustment to issuance value of $4.7 million and the distributions associated with the Series A Preferred Units of $0.7 million have been included in the calculation of partners’ capital and earnings per unit for the three months ended September 30, 2013.  The distributions associated with the Series A Preferred Units of $1.3 million have been included in the calculation of partners’ capital and earnings per unit for the nine months ended September 30, 2013. Additionally, none of the identified embedded derivatives relating to the terms of the Series A Preferred Units require bifurcation, as each embedded derivative was determined to be clearly and closely related to the host contract.
	Voting Rights: The Series A Preferred Units are a new class of voting equity security that ranks 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 have voting rights identical to the voting rights of the common units and vote 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) is entitled to one vote for each common unit into which such Series A Preferred Unit is convertible on each matter with respect to which each common unit is entitled to vote.
	Distribution Rights: Holders of Series A Preferred Units are 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 determines to begin paying quarterly distributions in cash, and thereafter in cash. The board of directors of our General Partner may not elect to begin paying quarterly distributions on the Series A Preferred Units in cash until we have exercised the Target Leverage Option (pursuant to the Second Amendment) under our Amended Credit Facility.  In-kind distributions will be 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) or, beginning after four full quarters, such higher per unit rate as is paid in respect of our common units. Cash distributions will equal the greater of $0.40 per unit per quarter or the quarterly distribution paid with respect to each common unit.
	Conversion Rights: Beginning on the later of January 1, 2015 and the date we exercise the Target Leverage Option (pursuant to the Second Amendment), Series A Preferred Units (including Series A Preferred Units issued as in-kind distributions) will be convertible into common units on a one-for-one basis, except that conversion will be prohibited to the extent that it would cause (on a pro forma basis) our estimated quarterly distributions over any of the succeeding four quarters to exceed our total distributable cash flow in that quarter. Additionally, on the later of January 1, 2015 and the date we exercise the Target Leverage Option (pursuant to the Second Amendment), we will have the right at any time to convert all or some of the Series A Preferred Units (including Series A Preferred Units issued as in-kind distributions) then outstanding into common units if (i) the daily volume-weighted average trading price of the common units on the national securities exchange on which the common units are listed or admitted to trading for the trailing 30-trading-day period before our notice of conversion is greater than 130.0% of the unit purchase price for the Series A Preferred Units, (ii) the average daily trading volume of common units on the securities exchange exceeds 40,000 common units for those 30 trading days and (iii) the conversion would not cause (on a pro forma basis) our estimated quarterly distributions over any of the succeeding four quarters to exceed our total distributable cash flow in that quarter.  Further, the Series A Preferred Units will be convertible into common units based on an exchange ratio of 110.0% of the Series A Preferred Units if a third party acquires majority ownership control of our General Partner or we sell substantially all of our assets, in either case before January 1, 2015.
	Dissolution and Liquidation: The Series A Preferred Units are senior to our common units with respect to rights on dissolution and liquidation. Common units issued upon conversion of Series A Preferred Units will rank equally with the rest of our common units with respect to rights on dissolution and liquidation.

PARTNERS_CAPITAL

PARTNERS' CAPITAL	9 Months Ended
	Sep. 30, 2013
Partners' Capital Notes [Abstract]	'
PARTNERS' CAPITAL	'
	PARTNERS’ CAPITAL
	Common Units
	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. We had 12,222,692 and 12,213,713 common units issued and outstanding as of September 30, 2013 and December 31, 2012, respectively.
	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. We had 12,213,713 subordinated units issued and outstanding as of September 30, 2013 and December 31, 2012.
	General Partner Interests
	Our general partner interest consisted of 534,638 general partner units as of September 30, 2013 and 498,518 general partner units as of December 31, 2012.  In connection with the Private Placement, our General Partner made a capital contribution in the amount of $0.8 million in exchange for an issuance of an additional 35,000 general partner units during the second quarter of 2013 to maintain its 2.0% ownership interest in us. The General Partner has received general partner unit PIK distributions from the general partner units purchased in connection with the Private Placement (See Note 3).

UNIT_BASED_COMPENSATION

UNIT BASED COMPENSATION	9 Months Ended
	Sep. 30, 2013
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]	'
UNIT BASED COMPENSATION	'
	UNIT BASED COMPENSATION
	Long-Term Incentive Plan
	On November 7, 2012, and in connection with our IPO, we established a 2012 Long-Term Incentive Plan (“Incentive Plan”), which provides incentive awards to eligible officers, employees and directors of our General Partner. Awards granted to employees under the Incentive Plan vest over a three-year period in equal annual installments 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 Incentive Plan:
		Nine Months Ended September 30, 2013
		Units		Weighted-average fair
				value at grant date
	Unvested - December 31, 2012	144,500		$	23.01
	Granted units	110,279		$	22
	Forfeited units	(13,200	)	$	22.53
	Vested units	(8,979	)	$	19.83
	Unvested - September 30, 2013	232,600		$	22.56
	We granted awards under the Incentive Plan, which we have classified as equity awards, with a grant date fair value of $2.4 million for the nine months ended September 30, 2013. As of September 30, 2013, we had total unamortized compensation expense of $4.1 million related to these awards, which we expect to be amortized over the three-year vesting period from each equity award’s grant date. As of September 30, 2013, we had 1,508,421 units available for issuance under the Incentive Plan.
	Unit Based Compensation Expense
	The following table summarizes information regarding recognized compensation expense, which is included in general and administrative expense on our consolidated statements of operations (in thousands):
		Three Months Ended September 30,					Nine Months Ended September 30,
		2013			2012		2013		2012
	Unit-based compensation	$	552		$	147	$	1,645	$	293

REVENUES

REVENUES	9 Months Ended
	Sep. 30, 2013
Revenues [Abstract]	'
REVENUES	'
	REVENUES
	We had revenues consisting of the following categories (in thousands):
		Three Months Ended September 30,				Nine Months Ended September 30,
		2013		2012		2013		2012
	Sales of natural gas	$	99,483	$	80,290	$	304,343	$	217,484
	Sales of NGLs and condensate	45,916		26,487		112,128		94,133
	Transportation, gathering and processing fees	15,124		11,290		42,644		32,573
	Other	106		83		468		279
	Total revenues	$	160,629	$	118,150	$	459,583	$	344,469

CONCENTRATION_OF_CREDIT_RISK_A

CONCENTRATION OF CREDIT RISK AND TRADE ACCOUNTS RECEIVABLE	9 Months Ended
	Sep. 30, 2013
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, 2013 and 2012 represent the following percentages of consolidated revenue:
		Three Months Ended September 30,				Nine Months Ended September 30,
		2013		2012		2013		2012
	Top 10 customers	69.1	%	59	%	58.8	%	66	%
	The percentage of total consolidated revenue for each customer that exceeded 10% of total revenues for the three and nine months ended September 30, 2013 and 2012 was as follows:
		Three Months Ended September 30,				Nine Months Ended September 30,
		2013		2012		2013		2012
	Sherwin Alumina Company	12	%	12.2	%	12.3	%	10.8	%
	Trafigura AG	13.1	%	(a)		(a)		(a)
	Formosa Hydrocarbons Co., Inc.	(a),(b)		16.3	%	(a),(b)		24.8	%
	(a) Information is not provided for periods for which the customer or producer was less than 10% of our consolidated revenue.
	(b) Our contract with Formosa terminated on June 1, 2013.
	For the nine months ended September 30, 2013 and 2012, we did not experience significant non-payment for services. At September 30, 2013, we did not record an allowance for uncollectible accounts receivable.

SUBSEQUENT_EVENTS

SUBSEQUENT EVENTS	9 Months Ended
	Sep. 30, 2013
Subsequent Events [Abstract]	'
SUBSEQUENT EVENTS	'
	SUBSEQUENT EVENTS
	Partnership Distribution
	On October 21, 2013, we declared a cash distribution of $0.40 per common unit and subordinated unit, including units equivalent to our General Partner’s two percent interest in the Partnership, which will be paid on November 14, 2013 to unitholders of record on November 7, 2013.  Also on October 21, 2013, we declared a Series A Preferred Unit distribution of $0.40 per unit, which will be paid in-kind on November 14, 2013 to unitholders of record on November 7, 2013, and our General Partner will receive a number of general partner units to maintain the General Partner’s two percent interest in the Partnership.

BASIS_OF_PRESENTATION_AND_SUMM1

BASIS OF PRESENTATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies)	9 Months Ended
	Sep. 30, 2013
Accounting Policies [Abstract]	'
Basis of Presentation	'
	Basis of Presentation
	We prepared this Quarterly Report on Form 10-Q (this “report”) under the rules and regulations of the Securities and Exchange Commission (“SEC”) 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 2012 Annual Report on Form 10-K. The condensed consolidated financial statements as of September 30, 2013, and for the three and nine months ended September 30, 2013 and 2012, are unaudited.  All intercompany accounts and transactions have been eliminated in the preparation of the accompanying condensed consolidated financial statements.
	In management’s opinion, the accompanying unaudited condensed consolidated financial statements include all adjustments, consisting of normal recurring accruals and estimates necessary for the fair presentation of the results of operations for the periods presented.  Actual results could 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 2012 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 herein.
Recent Accounting Pronouncements	'
	Recent Accounting Pronouncements
	Accounting standard-setting organizations frequently issue new or revised accounting rules. We regularly review new pronouncements to determine their impact, if any, on our consolidated financial statements, and currently there are no new accounting pronouncements that would have a material impact.

NET_LOSS_PER_LIMITED_PARTNER_U1

NET LOSS PER LIMITED PARTNER UNIT AND DISTRIBUTIONS (Tables)	9 Months Ended
	Sep. 30, 2013
Net loss per limited partner unit and distributions	'
Schedule of Distributions Earned and Declared	'
	The following table represents our distribution declared for the period ended September 30, 2013 and distributions paid for the periods ended June 30, 2013, March 31, 2013 and December 31, 2012 (in thousands, except per unit data):
												Distributions
			Attributable to the		Per Unit							Limited Partners
	Payment Date		Quarter Ended		Distribution							Common				Subordinated			General Partner			Total
	2013
	14-Nov-13		30-Sep-13		$	0.4						$	4,888			$	4,885		$	214		$	9,987
	14-Aug-13		30-Jun-13		0.35				(1	)		—				—			10			10
	14-Aug-13		30-Jun-13		0.2				(2	)		—				—			1			1
	14-Aug-13		30-Jun-13		0.4							4,890				4,886			199			9,975
	15-May-13		31-Mar-13		0.4							4,888				4,886			199			9,973
	2012
	February 14, 2013		December 31, 2012		0.24				(3	)		2,931				2,931			120			5,982
	(1) 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 29,925 general partner units on April 12, 2013.
	(2) 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 5,075 general partner units on May 15, 2013.
	(3) 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 IPO 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, 2013 (in thousands, except unit and per unit data):
			Three Months Ended September 30, 2013				Nine Months Ended September 30, 2013
	Net loss		$	(4,069	)		$	(16,645	)
	Series A Preferred Unit distribution		(696		)		(1,255		)
	Series A Preferred Unit valuation adjustment to maximum redemption value (1)		4,667				—
	Net loss attributable to partners		$	(98	)		$	(17,900	)
	General partner’s interest		$	(81	)		$	(334	)
	Limited partners’ interest:
	Common (1)		$	2,323			$	(8,784	)
	Subordinated		$	(2,340	)		$	(8,782	)
	Common Units		Three Months Ended September 30, 2013				Nine Months Ended September 30, 2013
	Interest in net (loss) income		$	2,323			$	(8,784	)
	Effect of dilutive units - numerator:
	Series A Preferred Unit distribution		341				—
	Series A Preferred Unit valuation adjustment to maximum redemption value (1)		(4,667		)		—
	Dilutive interest in net loss		$	(2,003	)		$	(8,784	)
	Weighted-average units - basic		12,222,692				12,219,699
	Effect of dilutive units - denominator (2):
	Series A Preferred Units		1,739,473				—
	Awards granted under long-term incentive plan		27,972				—
	Weighted-average units - dilutive		13,990,137				12,219,699
	Basic earnings per unit:
	Net (loss) income per unit		$	0.19			$	(0.72	)
	Dilutive earnings per unit:
	Net loss per unit		$	(0.14	)		$	(0.72	)
	Subordinated Units		Three Months Ended September 30, 2013				Nine Months Ended September 30, 2013
	Interest in net loss		$	(2,340	)		$	(8,782	)
	Weighted-average units - basic		12,213,713				12,213,713
	Effect of dilutive units (2)		—				—
	Weighted-average units - dilutive		12,213,713				12,213,713
	Basic and diluted net loss per subordinated unit		$	(0.19	)		$	(0.72	)
	(1) The valuation adjustment to maximum redemption value of the Series A Preferred Units as of September 30, 2013 increased income available to common units in the calculation of earnings per unit (See Note 11) for the three months ended September 30, 2013. There is no valuation adjustment to maximum redemption value for the Series A Preferred Units as of September 30, 2013 in the calculation of earnings per unit (See Note 11) for the nine months ended September 30, 2013.
	(2) Because we had a net loss for the nine months ended September 30, 2013 for the common units 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. 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 (See Note 13) and 1,739,473 Series A Preferred Units (See Note 11) 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 long-term incentive plan, 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.
	Distributions
	Our Second Amended and Restated Agreement of Limited Partnership (“Partn
Series A convertible preferred units	'
Net loss per limited partner unit and distributions	'
Schedule of Distributions Earned and Declared	'
	The following table represents the paid in-kind (“PIK”) distribution for the period ended June 30, 2013 and the PIK distribution earned for the period ended September 30, 2013 (in thousands, except per unit and in-kind distribution units):
	Payment Date		Attributable to the Quarter Ended		Per Unit Distribution						In-Kind Series A			In-Kind				In-Kind		In-Kind General Partner Distribution Value(3)
											Preferred Unit			Series A				Unit
											Distributions			Preferred				Distribution
											to Series A			Distributions				to General
											Preferred			Value(3)				Partner
											Holders
	2013
	14-Nov-13		30-Sep-13		$	0.4					30,439			$	696			621		$	14
	14-Aug-13		30-Jun-13		0.35				-1		22,276			509				455		10
	14-Aug-13		30-Jun-13		0.2				-2		2,199			50				45		1
	(1) 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.
	(2) 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.
	(3) The value was calculated based on the Series A Preferred Units issue price of $22.86 as stated in our Partnership Agreement, multiplied by the number of units distributed.
Common Units | Southcross Energy LLC	'
Net loss per limited partner unit and distributions	'
Schedule of reconciliation of net income loss	'
	The following is a reconciliation of net income per common unit used in the basic and diluted earnings per unit calculations for the three and nine months ended September 30, 2012 (in thousands, except unit and per unit data):
		Three Months Ended September 30, 2012				Nine Months Ended September 30, 2012
	Net loss attributable to Southcross Energy LLC common unitholders	$	(12,241	)		$	(15,014	)
	Weighted-average common units outstanding - basic	1,213,496				1,214,321
	Effect of unvested common units	129,210				165,276
	Weighted-average common units outstanding - diluted	$	1,342,706			$	1,379,597
	Basic and diluted net loss per Southcross Energy LLC common unit	$	(10.09	)		$	(12.36	)

FINANCIAL_INSTRUMENTS_Tables

FINANCIAL INSTRUMENTS (Tables)	9 Months Ended
	Sep. 30, 2013
Derivatives	'
Schedule of the fair value of the interest rate swap liabilities	'
	The fair value of the interest rate swap liabilities were as follows (in thousands):
		Fair value measurement as of
		30-Sep-13			31-Dec-12
		Significant Other Observable Inputs (Level 2)
	Interest rate swap liabilities	$	368		$	638
Summary of amounts recognized in interest expense associated with derivatives that are not designated as hedging instruments	'
	The 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,
		2013			2012			2013			2012
	Unrealized loss on interest rate cap	$	—		$	—		$	—		$	222
	Realized loss on interest rate cap	$	27		$	—		$	81		$	—
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 members’ equity and comprehensive income/(loss) were as follows (in thousands):
		Three Months Ended September 30,						Nine Months Ended September 30,
		2013			2012			2013			2012
	Change in value recognized in other comprehensive loss - effective portion	$	(82	)	$	(379	)	$	(112	)	$	(728	)
	Loss reclassified from accumulated other comprehensive loss to interest expense	$	108		$	84		$	302		$	169
Commodity Swaps	'
Derivatives	'
Schedule of amounts recognized in the statement of operations	'
	The realized 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,
		2013			2012			2013			2012
	Realized gain/(loss) on derivatives	$	(93	)	$	144		$	(149	)	$	105

LONGTERM_DEBT_Tables

LONG-TERM DEBT (Tables)	9 Months Ended
	Sep. 30, 2013
Debt Disclosure [Abstract]	'
Schedule of maximum adjusted consolidated total leverage ratio	'
	The Second Amendment provides that until we satisfy the Target Leverage Ratio, we are allowed to calculate an Adjusted Consolidated Total Leverage Ratio, which allows for the netting of our Consolidated Total Funded Indebtedness (as defined in the Credit Facility) with amounts on deposit in the Collateral Account, and our Adjusted Consolidated Total Leverage Ratio is not to exceed the ratios set forth below for the corresponding periods:
		Maximum Adjusted
		Consolidated
		Total Leverage Ratio
	September 30, 2013	7.25 to 1.00
	December 31, 2013	6.75 to 1.00
	March 31, 2014	6.25 to 1.00
	June 30, 2014	5.25 to 1.00
	September 30, 2014	5.00 to 1.00
	December 31, 2014	4.75 to 1.00
	March 31, 2015 and thereafter	4.50 to 1.00
Schedule of maximum consolidated total leverage ratio	'
	he Second Amendment provides that upon satisfying the Target Leverage Ratio we will not permit our Maximum Consolidated Total Leverage Ratio to exceed the ratio set forth below for the corresponding period:
		Maximum Consolidated
		Total Leverage Ratio
	September 30, 2013	4.75 to 1.00
	December 31, 2013 and thereafter	4.50 to 1.00

PROPERTY_PLANT_AND_EQUIPMENT_T

PROPERTY, PLANT AND EQUIPMENT (Tables)	9 Months Ended
	Sep. 30, 2013
Property, Plant and Equipment [Abstract]	'
Schedule of property, plant and equipment	'
	Property, plant and equipment consisted of the following (in thousands):
		Estimated	30-Sep-13			31-Dec-12
		Useful Life (yrs)
	Pipelines	30	$	339,925		$	250,177
	Gas processing, treating and other plants	15	243,891			221,594
	Compressors	7	20,030			19,241
	Rights of way and easements	15	20,729			20,729
	Furniture, fixtures and equipment	5	3,293			3,087
	Capital lease vehicles	5-Mar	1,399			—
	Total property, plant and equipment		629,267			514,828
	Accumulated depreciation and amortization		(71,282		)	(46,466		)
	Total		557,985			468,362
	Construction in progress		15,758			77,011
	Land and other		5,308			5,230
	Property, plant and equipment, net		$	579,051		$	550,603

OTHER_ASSETS_Tables

OTHER ASSETS (Tables)	9 Months Ended
	Sep. 30, 2013
Other Assets, Noncurrent Disclosure [Abstract]	'
Schedule of other assets	'
	Other assets consisted of the following (in thousands):
		30-Sep-13		31-Dec-12
	Deferred financing costs	$	5,577	$	4,385
	Prepaid expenses	605		551
	Other	201		195
	Total other assets	$	6,383	$	5,131
Schedule of amortization of deferred financing costs recorded in interest expense	'
	Deferred financing costs are amortized over the life of the Credit Facility.  Amortization of deferred financing costs recorded in interest expense were as follows (in thousands):
		Three months ended September 30,				Nine months ended September 30,
		2013		2012		2013		2012
	Amortization of deferred financing costs	$	345	$	322	$	947	$	948

COMMITMENTS_AND_CONTINGENCIES_

COMMITMENTS AND CONTINGENCIES (Tables)	9 Months Ended
	Sep. 30, 2013
Commitments and Contingencies Disclosure [Abstract]	'
Schedule of future minimum annual rental commitments under capital leases	'
	Fiscal Year	Capital Leases
	2013 (remaining)	$	144
	2014	516
	2015	291
	2016	99
	2017	28
	Total future payments	1,078
	Less: Imputed interest	(46		)
	Future lease payments	$	1,032
Schedule of future minimum annual rental commitments under the entity's operating leases	'
	Future minimum annual rental commitments under our operating leases as of September 30, 2013 were as follows (in thousands):
	Fiscal Year	Operating Leases
	2013 (remaining)	$	150
	2014	578
	2015	539
	2016	436
	2017	294
	Future lease payments	$	1,997

UNIT_BASED_COMPENSATION_Tables

UNIT BASED COMPENSATION (Tables)	9 Months Ended
	Sep. 30, 2013
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 Incentive Plan:
		Nine Months Ended September 30, 2013
		Units		Weighted-average fair
				value at grant date
	Unvested - December 31, 2012	144,500		$	23.01
	Granted units	110,279		$	22
	Forfeited units	(13,200	)	$	22.53
	Vested units	(8,979	)	$	19.83
	Unvested - September 30, 2013	232,600		$	22.56
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 consolidated statements of operations (in thousands):
		Three Months Ended September 30,					Nine Months Ended September 30,
		2013			2012		2013		2012
	Unit-based compensation	$	552		$	147	$	1,645	$	293

REVENUES_Tables

REVENUES (Tables)	9 Months Ended
	Sep. 30, 2013
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,
		2013		2012		2013		2012
	Sales of natural gas	$	99,483	$	80,290	$	304,343	$	217,484
	Sales of NGLs and condensate	45,916		26,487		112,128		94,133
	Transportation, gathering and processing fees	15,124		11,290		42,644		32,573
	Other	106		83		468		279
	Total revenues	$	160,629	$	118,150	$	459,583	$	344,469

CONCENTRATION_OF_CREDIT_RISK_A1

CONCENTRATION OF CREDIT RISK AND TRADE ACCOUNTS RECEIVABLE (Tables)	9 Months Ended
	Sep. 30, 2013
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, 2013 and 2012 was as follows:
		Three Months Ended September 30,				Nine Months Ended September 30,
		2013		2012		2013		2012
	Sherwin Alumina Company	12	%	12.2	%	12.3	%	10.8	%
	Trafigura AG	13.1	%	(a)		(a)		(a)
	Formosa Hydrocarbons Co., Inc.	(a),(b)		16.3	%	(a),(b)		24.8	%
	(a) Information is not provided for periods for which the customer or producer was less than 10% of our consolidated revenue.
	(b) Our contract with Formosa terminated on June 1, 2013.
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, 2013 and 2012 represent the following percentages of consolidated revenue:
		Three Months Ended September 30,				Nine Months Ended September 30,
		2013		2012		2013		2012
	Top 10 customers	69.1	%	59	%	58.8	%	66	%

ORGANIZATION_AND_DESCRIPTION_O1

ORGANIZATION AND DESCRIPTION OF BUSINESS (Details)	9 Months Ended
	Sep. 30, 2013
	segment
Organization, Consolidation and Presentation of Financial Statements [Abstract]	'
Number of reportable segments	1

NET_LOSS_PER_LIMITED_PARTNER_U2

NET LOSS PER LIMITED PARTNER UNIT AND DISTRIBUTIONS (Details) (USD $)	3 Months Ended		9 Months Ended
In Thousands, except Share data, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Earnings Per Limited Partner Unit	'	'	'	'
Net loss	($4,069)	($4,041)	($16,645)	$4,134
Net loss attributable to partners	-98	'	-17,900	'
General partner's interest	-81	'	-334	'
Series A preferred unit	'	'	'	'
Earnings Per Limited Partner Unit	'	'	'	'
Net loss	700	'	600	'
Series A preferred unit in-kind distribution	-696	'	-1,255	'
Series A preferred unit valuation adjustment to maximum value	4,667	'	0	'
Common Units	'	'	'	'
Earnings Per Limited Partner Unit	'	'	'	'
Net loss	'	'	-8,172	'
Net loss attributable to partners	2,323	'	-8,784	'
Limited partners' interest	2,323	'	-8,784	'
Net Income (Loss) Available to Common Stockholders, Diluted	-2,003	'	-8,784	'
Weighted-average units - basic (in shares)	12,222,692	1,213,496	12,219,699	1,214,321
Weighted-average units - dilutive (in shares)	13,990,137	1,342,706	12,219,699	1,379,597
Basic earnings per unit:	'	'	'	'
Basic net (loss) income per common unit	$0.19	'	($0.72)	'
Dilutive earnings per unit:	'	'	'	'
Diluted net loss per common unit	($0.14)	'	($0.72)	'
Basic and diluted net loss per limited partner subordinated unit (in dollars per share)	'	($10.09)	'	($12.36)
Subordinated Units	'	'	'	'
Earnings Per Limited Partner Unit	'	'	'	'
Net loss	'	'	-8,164	'
Net loss attributable to partners	-2,340	'	-8,782	'
Limited partners' interest	-2,340	'	-8,782	'
Weighted-average units - basic (in shares)	12,213,713	'	12,213,713	'
Effect of dilutive units (in shares)	0	'	0	'
Weighted-average units - dilutive (in shares)	12,213,713	'	12,213,713	'
Dilutive earnings per unit:	'	'	'	'
Basic and diluted net loss per limited partner subordinated unit (in dollars per share)	($0.19)	'	($0.72)	'
Series A convertible preferred units	'	'	'	'
Earnings Per Limited Partner Unit	'	'	'	'
Series A preferred unit in-kind distribution	-696	'	-1,255	'
Series A preferred unit valuation adjustment to maximum value	4,667	'	0	'
Series A convertible preferred units | Common Units	'	'	'	'
Earnings Per Limited Partner Unit	'	'	'	'
Series A preferred unit in-kind distribution	341	'	-615	'
Series A preferred unit valuation adjustment to maximum value	-4,667	'	'	'
Series A convertible preferred units | Subordinated Units	'	'	'	'
Earnings Per Limited Partner Unit	'	'	'	'
Series A preferred unit in-kind distribution	'	'	($615)	'
Series A convertible preferred units | Common Units	'	'	'	'
Earnings Per Limited Partner Unit	'	'	'	'
Effect of dilutive units (in shares)	1,739,473	'	'	'
Phantom Share Units (PSUs) | Common Units	'	'	'	'
Earnings Per Limited Partner Unit	'	'	'	'
Effect of dilutive units (in shares)	27,972	'	'	'

NET_LOSS_PER_LIMITED_PARTNER_U3

NET LOSS PER LIMITED PARTNER UNIT AND DISTRIBUTIONS (Details 2)	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Unvested phantom units	'	'	'	'
Amount of weighted average units not included in the computation of diluted per unit	'	'	'	'
Amount of weighted average units not included in the computation of diluted per unit (in shares)	27,972	129,210	20,221	165,276
Series A preferred unit	'	'	'	'
Amount of weighted average units not included in the computation of diluted per unit	'	'	'	'
Amount of weighted average units not included in the computation of diluted per unit (in shares)	1,739,473	'	1,052,329	'

NET_LOSS_PER_LIMITED_PARTNER_U4

NET LOSS PER LIMITED PARTNER UNIT AND DISTRIBUTIONS (Details 3) (USD $)

9 Months Ended

0 Months Ended

3 Months Ended

0 Months Ended

3 Months Ended

9 Months Ended

3 Months Ended

1 Months Ended

3 Months Ended

1 Months Ended

9 Months Ended

3 Months Ended

1 Months Ended

0 Months Ended

9 Months Ended

0 Months Ended

9 Months Ended

Sep. 30, 2013

Apr. 12, 2013

Sep. 30, 2013

Mar. 27, 2013

Nov. 07, 2012

15-May-13

Apr. 12, 2013

Sep. 30, 2013

Jun. 30, 2013

Sep. 30, 2013

Jun. 30, 2013

15-May-13

Apr. 12, 2013

Sep. 30, 2013

Sep. 30, 2013

Jun. 30, 2013

Jun. 30, 2013

Sep. 30, 2013

Jun. 30, 2013

Jun. 30, 2013

Sep. 30, 2013

Jun. 30, 2013

Jun. 30, 2013

Nov. 13, 2013

15-May-13

Feb. 14, 2013

Sep. 30, 2013

Nov. 13, 2013

Aug. 14, 2013

Aug. 14, 2013

Aug. 14, 2013

15-May-13

Feb. 14, 2013

Nov. 13, 2013

Aug. 14, 2013

15-May-13

Feb. 14, 2013

Nov. 13, 2013

Aug. 14, 2013

15-May-13

Feb. 14, 2013

Nov. 13, 2013

Aug. 14, 2013

Aug. 14, 2013

Aug. 14, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Credit Facility, due November 2017

Credit Facility, due November 2017

Credit Facility, due November 2017

Credit Facility, due November 2017

Series A preferred unit

Series A preferred unit

Series A preferred unit

Series A preferred unit

General Partner

General Partner

General Partner

General Partner

PIK distribution

PIK distribution

PIK distribution

PIK distribution

PIK distribution

PIK distribution

PIK distribution

PIK distribution

PIK distribution

PIK distribution

Cash

Cash

Cash

Cash

Cash

Cash

Cash

Cash

Cash

Cash

Cash

Cash

Cash

Cash

Cash

Cash

Cash

Cash

Cash

Cash

Cash

Cash

Maximum

QTD

YTD

item

Series A preferred unit

Series A preferred unit

Series A preferred unit

Series A preferred unit

Series A Preferred Holders

Series A Preferred Holders

Series A Preferred Holders

General Partner

General Partner

General Partner

Subsequent event

Subsequent event

Subsequent event

Subsequent event

Common Units

Common Units

Common Units

Common Units

Subordinated Units

Subordinated Units

Subordinated Units

Subordinated Units

General Partner

General Partner

General Partner

General Partner

General Partner

General Partner

Cash

Cash

Cash

Subsequent event

Subsequent event

Subsequent event

Series A preferred unit

Series A preferred unit

Series A preferred unit

Series A preferred unit

Series A preferred unit

Series A preferred unit

Distribution period from April 12, 2013 to June 30, 2013

Distribution Period from May 15, 2013 to June 30, 2013

Subsequent event

Subsequent event

Subsequent event

Subsequent event

Subsequent event

Subsequent event

Subsequent event

Subsequent event

Distribution Period from July 1 2013 to September 30 2013 [Member] [Domain]

Distribution period from April 12, 2013 to June 30, 2013

Distribution Period from May 15, 2013 to June 30, 2013

Subsequent event

Subsequent event

Subsequent event

Subsequent event

Subsequent event

Subsequent event

Distribution period from April 12, 2013 to June 30, 2013

Distribution Period from May 15, 2013 to June 30, 2013

Distribution Period from July 1 2013 to September 30 2013 [Member] [Domain]

Distribution period from April 12, 2013 to June 30, 2013

Distribution Period from May 15, 2013 to June 30, 2013

Distribution Period from July 1 2013 to September 30 2013 [Member] [Domain]

Distribution period from April 12, 2013 to June 30, 2013

Distribution Period from May 15, 2013 to June 30, 2013

Distributions made to Limited Partner [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Distribution period

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'45 days

'

'

Maximum quarterly distributions until the Target Leverage Ratio is achieved (in dollars per share)

$0.40

$0.40

$0.40

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Amount raised through issuance of units

'

'

'

'

'

'

'

$40,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Preferred units issued

'

'

'

'

'

248,675

1,466,325

1,715,000

1,715,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Maximum borrowing capacity

'

'

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%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Series A preferred units , PIK distribution earned

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

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'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Per Unit Distribution (in dollars per unit)

'

'

'

'

'

'

'

'

'

'

'

'

'

'

$0.40

$0.35

$0.20

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

In-Kind Unit Distributions (in shares)

'

'

'

'

'

'

'

'

'

'

'

'

'

'

696,000

509,000

50,000

30,439

22,276

2,199

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Value (in dollars)

'

'

'

'

'

'

'

'

'

'

'

'

'

'

14,000

10,000

1,000

'

'

'

621

455

45

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Common units, distribution declared and paid

'

'

'

'

'

'

'

'

'

'

'

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'

'

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'

'

'

'

'

Per Unit Distribution (in dollarsr per unit)

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

$0.40

$0.40

$0.24

'

'

$0.40

$0.35

$0.20

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

$0.40

$1.60

Distributions (in dollars)

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

$9,973,000

$5,982,000

'

$9,987,000

$9,975,000

$10,000

$1,000

$4,888,000

$2,931,000

$4,888,000

$4,890,000

$4,886,000

$2,931,000

$4,885,000

$4,886,000

$199,000

$120,000

$214,000

$199,000

$10,000

$1,000

'

'

'

Minimum quarterly distribution (in dollars per unit)

'

'

'

'

'

'

'

'

'

'

'

'

'

$0.40

'

'

'

'

'

'

'

'

'

'

'

'

$0.40

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Minimum annual distribution (in dollars per unit)

'

'

'

'

'

'

'

'

'

'

'

'

'

$1.60

'

'

'

'

'

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'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

$1.60

'

'

General partner units issued (in shares)

'

'

'

'

'

'

'

'

'

35,000

35,000

5,075

29,925

'

'

'

'

'

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'

'

'

'

'

Units issuance price (in dollars per unit)

'

'

'

'

'

$22.86

$22.86

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'

'

'

'

'

NET_LOSS_PER_LIMITED_PARTNER_U5

NET LOSS PER LIMITED PARTNER UNIT AND DISTRIBUTIONS (Details 4) (USD $)	3 Months Ended		9 Months Ended
In Thousands, except Share data, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Net loss per limited partner unit and distributions	'	'	'	'
Net loss attributable to Southcross Energy LLC common unitholders	'	($12,241)	'	($15,014)
Common Units	'	'	'	'
Net loss per limited partner unit and distributions	'	'	'	'
Net loss attributable to Southcross Energy LLC common unitholders	'	($12,241)	'	($15,014)
Weighted-average units - basic (in shares)	12,222,692	1,213,496	12,219,699	1,214,321
Weighted-average units - dilutive (in shares)	13,990,137	1,342,706	12,219,699	1,379,597
Basic and diluted earnings per unit:	'	'	'	'
Basic and diluted net loss per Southcross Energy LLC common unit	'	($10.09)	'	($12.36)
Phantom Share Units (PSUs)	'	'	'	'
Net loss per limited partner unit and distributions	'	'	'	'
Effect of unvested common units (in shares)	27,972	129,210	20,221	165,276

FINANCIAL_INSTRUMENTS_Details

FINANCIAL INSTRUMENTS (Details) (Interest rate swap liabilities, USD $)	Sep. 30, 2013	Dec. 31, 2012
Fair value of financial instruments	'	'
Derivative liability, current	$400,000	$300,000
Derivative liability, non-current	0	300,000
Recurring basis | Significant Other Observable Inputs (Level 2)	'	'
Fair value of financial instruments	'	'
Fair value measurement	$368,000	$638,000

FINANCIAL_INSTRUMENTS_Details_

FINANCIAL INSTRUMENTS (Details 2) (USD $)

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, 2013

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2012

Mar. 31, 2012

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2012

Dec. 31, 2012

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

Interest rate swap contract

Interest rate swap contract

Interest rate swap contract

Interest rate swap contract

Commodity Swaps

Commodity Swaps

Commodity Swaps

Commodity Swaps

Commodity Swaps

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

Derivatives designated as hedging instruments

Derivatives designated as hedging instruments

Derivatives designated as hedging instruments

Derivatives designated as hedging instruments

MMBTU

item

item

Derivatives

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Notional amount

'

'

'

'

'

'

'

'

'

'

'

$150,000,000

'

'

'

'

'

'

'

Description of variable rate

'

'

'

'

'

'

'

'

'

'

'

'one-month LIBOR

'

'

'

'

'

'

'

LIBOR based fixed rate paid (as a percent)

'

'

'

'

'

'

'

'

'

'

'

0.54%

'

'

'

'

'

'

'

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

'

'

'

'

'

'

'

'

'

-82,000

-379,000

'

-112,000

-728,000

'

'

'

'

'

Loss reclassified from accumulated other comprehensive loss to income/loss

'

'

'

'

'

108,000

84,000

302,000

169,000

'

'

'

'

'

'

'

'

'

'

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

'

'

'

'

'

'

'

'

'

'

'

'

400,000

'

'

'

'

'

'

Estimated period over which hedging activity to be reclassified from accumulated other comprehensive income into income/(loss)

'

'

'

'

'

'

'

'

'

'

'

'

'12 months

'

'

'

'

'

'

Unrealized loss

0

222,000

'

'

-222,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Realized (loss) on derivatives

'

'

$27,000

$81,000

'

'

'

'

'

'

'

'

'

'

($93,000)

$144,000

($149,000)

$105,000

'

Volume of month-ahead swap contracts (in MMBtu)

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

25,000

'

'

Number of outstanding month-ahead swap contracts

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

0

LONGTERM_DEBT_Details

LONG-TERM DEBT (Details) (USD $)

3 Months Ended

9 Months Ended

0 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

0 Months Ended

6 Months Ended

Share data in Thousands, except Per Share data, unless otherwise specified

Sep. 30, 2013

Sep. 30, 2013

Oct. 04, 2013

Sep. 30, 2013

15-May-13

Apr. 12, 2013

Sep. 30, 2013

Apr. 12, 2013

Aug. 06, 2013

Apr. 12, 2013

Sep. 30, 2013

Sep. 30, 2013

Mar. 27, 2013

Nov. 07, 2012

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Apr. 12, 2013

Sep. 30, 2013

Apr. 12, 2013

Apr. 12, 2013

Apr. 12, 2013

Apr. 12, 2013

Apr. 12, 2013

Apr. 12, 2013

Apr. 12, 2013

Apr. 12, 2013

Apr. 12, 2013

Mar. 27, 2013

Nov. 07, 2012

Jun. 30, 2012

General Partner

General Partner

General Partner

Series A convertible preferred units

Series A convertible preferred units

Series A convertible preferred units

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

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

Letters of credit

Credit Agreement, due June 2014

General Partner

exercise

right

Southcross LLC [Member]

Weighted average

Weighted average

30-Sep-13

30-Sep-13

31-Dec-13

31-Mar-14

30-Jun-14

30-Sep-14

31-Dec-14

March 31, 2015 and thereafter

December 31, 2013 and thereafter

March 31, 2014 and thereafter

LONG TERM DEBT

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Maximum borrowing capacity

'

'

'

'

'

'

'

'

'

'

$350,000,000

$350,000,000

$250,000,000

$350,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

$50,000,000

$35,000

$75,000,000

'

Fees incurred in connection with the amendment to credit facility

'

'

'

'

'

'

'

'

'

1,500,000

'

'

600,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Leverage ratio for one quarter

'

'

'

'

'

'

'

'

'

4.25

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Leverage ratio for two consecutive quarters

'

'

'

'

'

'

'

'

'

4.5

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Maximum number of times the right can be exercised under the financial covenants

'

'

'

'

'

'

'

'

'

2

1

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Amount deposited by general partner into the Collateral Account

'

'

3,000,000

8,500,000

5,800,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Deposit in the collateral account utilized to purchase the preferred units

'

'

'

'

'

34,200,000

'

34,200,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Description of variable rate basis

'

'

'

'

'

'

'

'

'

'LIBOR

'

'LIBOR

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Basis spread on variable rate (as a percent)

'

'

'

'

'

3.25%

'

'

'

'

'

4.50%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

3.25%

Maximum growth capital expenditures for the remainder of 2013

'

'

'

'

'

'

'

'

'

25,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Maximum additional growth capital expenditures for the subsequent 18 months ended June 30, 2015

'

'

'

'

'

'

'

'

'

25,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Increase in amount deposited by general partner into the Collateral Account

'

'

'

'

'

'

'

'

'

28,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Maximum quarterly distributions until the Target Leverage Ratio is achieved (in dollars per share)

'

$0.40

'

'

'

'

'

'

'

$0.40

$0.40

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Investment amount made by Southcross Energy LLC and General Partner

'

'

'

'

'

'

'

'

'

'

40,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Units exchanged for investment amount made by Southcross Energy LLC and General Partner (in shares)

'

'

'

'

'

'

1,715

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Total capital infusion

'

'

'

'

'

'

40,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Minimum Consolidated EBITDA

'

'

'

'

'

'

'

'

'

'

9,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Amount deposited into the Collateral Account by utilizing cure rights

'

'

'

'

'

'

'

'

2,700,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Maximum adjusted consolidated total leverage ratio

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

7.25

6.5

6.75

6.25

5.25

5

4.75

4.5

'

'

'

'

'

'

Maximum consolidated total leverage ratio

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

4.75

'

'

'

'

'

'

'

4.5

'

'

'

'

'

Minimum consolidated interest coverage ratio

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

2.25

2.8

2.25

'

'

'

'

'

'

2.5

'

'

'

'

Basis spread on variable rate until the Target Leverage Ratio is achieved (as a percent)

'

'

'

'

'

'

'

'

'

4.50%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Weighted-average interest rate (as a percent)

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

4.80%

4.33%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Borrowings

'

'

'

'

'

'

'

'

'

'

258,500,000

258,500,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Remaining available borrowings capacity

'

'

'

'

'

'

'

'

'

'

28,700

28,700

'

'

33,100,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Average borrowings outstanding

254,200,000

238,900,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Maximum outstanding borrowings

$258,500,000

$257,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

PROPERTY_PLANT_AND_EQUIPMENT_D

PROPERTY, PLANT AND EQUIPMENT (Details) (USD $)

1 Months Ended

3 Months Ended

6 Months Ended

9 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

3 Months Ended

Jan. 31, 2013

Sep. 30, 2013

Sep. 30, 2012

Mar. 31, 2012

Jun. 30, 2012

Sep. 30, 2013

Sep. 30, 2012

Dec. 31, 2012

Sep. 30, 2013

Dec. 31, 2012

Sep. 30, 2013

Dec. 31, 2012

Sep. 30, 2013

Dec. 31, 2012

Sep. 30, 2013

Dec. 31, 2012

Sep. 30, 2013

Dec. 31, 2012

Sep. 30, 2013

Dec. 31, 2012

Sep. 30, 2013

Dec. 31, 2012

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Dec. 31, 2012

Sep. 30, 2013

Dec. 31, 2012

Sep. 30, 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

Gas processing, treating and other plants

Gas processing, treating and other plants

Compressors

Compressors

Rights of way and easements

Rights of way and easements

Furniture, fixtures & equipment

Furniture, fixtures & 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

Compressor station

Maximum

Minimum

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

'

$629,267,000

'

'

'

$629,267,000

'

$514,828,000

'

'

$339,925,000

$250,177,000

$243,891,000

$221,594,000

$20,030,000

$19,241,000

$20,729,000

$20,729,000

$3,293,000

$3,087,000

$1,399,000

$0

'

'

'

'

'

'

'

Accumulated depreciation and amortization

'

-71,282,000

'

'

'

-71,282,000

'

-46,466,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Property, plant and equipment, net

'

579,051,000

'

'

'

579,051,000

'

550,603,000

557,985,000

468,362,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

15,758,000

77,011,000

5,308,000

5,230,000

'

Depreciation expense

'

9,447,000

5,522,000

'

12,860,000

24,958,000

12,860,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Accelerated depreciation

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

1,300,000

Capitalized interest

'

300,000

'

2,200,000

'

1,300,000

4,500,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Service charges

3,900,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Amount recovered from insurance

'

1,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Deductible amount

$300,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

OTHER_ASSETS_Details

OTHER ASSETS (Details) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012
Payments of Financing Costs	'	'	$2,139	$2,513	'
OTHER ASSETS	'	'	'	'	'
Deferred financing costs	5,577	'	5,577	'	4,385
Prepaid expenses	605	'	605	'	551
Other	201	'	201	'	195
Total other assets	6,383	'	6,383	'	5,131
Financing costs incurred	'	'	'	'	5,200
Amortization of deferred financing costs	$345	$322	$947	$948	'

ACCOUNTS_PAYABLE_AND_ACCRUED_L1

ACCOUNTS PAYABLE AND ACCRUED LIABILITIES (Details) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Millions, unless otherwise specified
Payables and Accruals [Abstract]	'	'
Accounts payable related to capital expenditures	$6.50	$40.70

COMMITMENTS_AND_CONTINGENCIES_1

COMMITMENTS AND CONTINGENCIES (Details) (USD $)	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012
	item		item		item
Legal Matters	'	'	'	'	'
Number of pending proceedings	0	'	0	'	'
Capital leases	'	'	'	'	'
Amortization expense related to the capital leases	$100,000	'	$400,000	'	'
Number of capital leses	'	'	'	'	0
Future minimum annual rental commitments	'	'	'	'	'
2013 (remaining)	144,000	'	144,000	'	'
2014	516,000	'	516,000	'	'
2015	291,000	'	291,000	'	'
2016	99,000	'	99,000	'	'
2017	28,000	'	28,000	'	'
Total future payments	1,078,000	'	1,078,000	'	'
Less: Imputed interest	-46,000	'	-46,000	'	'
Future lease payments	1,032,000	'	1,032,000	'	'
Capital leases recorded	200,000	'	1,400,000	'	'
Future minimum annual rental commitments under our operating leases	'	'	'	'	'
2013 (remaining)	150,000	'	150,000	'	'
2014	578,000	'	578,000	'	'
2015	539,000	'	539,000	'	'
2016	436,000	'	436,000	'	'
2017	294,000	'	294,000	'	'
Total	1,997,000	'	1,997,000	'	'
Expenses associated with operating leases	400,000	1,100,000	600,000	1,600,000	'
Equipment related to capital projects	'	'	'	'	'
Purchase commitments	'	'	'	'	'
Commitments	'	'	$1,600,000	'	'

TRANSACTIONS_WITH_RELATED_PART1

TRANSACTIONS WITH RELATED PARTIES (Details) (USD $)

9 Months Ended

0 Months Ended

3 Months Ended

3 Months Ended

9 Months Ended

3 Months Ended

9 Months Ended

10 Months Ended

3 Months Ended

9 Months Ended

Sep. 30, 2013

15-May-13

Apr. 12, 2013

Sep. 30, 2013

Jun. 30, 2013

Jun. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2012

Nov. 06, 2012

Sep. 30, 2013

Sep. 30, 2013

director

Series A preferred unit

Series A preferred unit

Series A preferred unit

Series A preferred unit

Southcross Energy LLC

Southcross Energy LLC

Charlesbank

Charlesbank

Charlesbank

Charlesbank

Charlesbank

Charlesbank

Charlesbank

General Partner interest

General Partner interest

officer

Series A preferred unit

Series A preferred unit

Southcross Energy LLC

Southcross Energy LLC

Southcross Energy LLC

Southcross Energy LLC

Southcross Energy LLC

Related Party Transactions

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Annual management fee payable

'

'

'

'

'

'

'

'

'

'

'

'

'

$600,000

'

'

Management fees incurred

'

'

'

'

'

'

'

100,000

400,000

0

200,000

0

500,000

'

'

'

Number of officers

3

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Number of directors

3

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Reimbursements expenses incurred

'

'

'

'

'

'

'

'

'

'

'

'

'

'

$6,800,000

$18,900,000

Preferred units issued

'

248,675

1,466,325

1,715,000

1,715,000

1,500,000

'

'

'

'

'

'

'

'

'

'

Purchase price of units

'

$22.86

$22.86

'

'

'

'

'

'

'

'

'

'

'

'

'

Preferred units outstanding

'

'

'

'

'

'

218,068

'

'

'

'

'

'

'

'

'

SERIES_A_PREFERRED_UNITS_Detai

SERIES A PREFERRED UNITS (Details) (USD $)

3 Months Ended

9 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

9 Months Ended

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Jun. 30, 2013

Sep. 30, 2013

15-May-13

Apr. 12, 2013

Sep. 30, 2013

Jun. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Jun. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

General Partner

General Partner

General Partner

Series A preferred unit

Series A preferred unit

Series A preferred unit

Series A preferred unit

Series A preferred unit

Series A preferred unit

Series A preferred unit

Series A preferred unit

Series A convertible preferred units

Series A convertible preferred units

Series A convertible preferred units

item

General Partner

General Partner

Southcross Energy LLC

General Partner

Preferred units issued

'

'

'

'

'

'

'

248,675

1,466,325

1,715,000

1,715,000

'

'

'

1,500,000

'

'

'

Purchase price of units

'

'

'

'

'

'

'

$22.86

$22.86

'

'

'

'

'

'

'

'

'

Total capital infusion

'

'

'

'

'

'

'

'

'

$40,000,000

'

$40,000,000

'

'

'

'

'

'

Proceeds from issuance of units

'

'

'

'

'

'

'

'

'

'

'

'

39,200,000

'

'

'

'

'

Capital contribution

'

'

'

'

800,000

800,000

'

'

'

'

'

'

'

800,000

'

'

'

'

Ownership interest held by general partners (as a percent)

'

'

2.00%

'

2.00%

2.00%

'

'

'

'

'

'

'

2.00%

'

'

'

'

Valuation adjustment to maximum redemption value

'

'

'

'

'

'

'

'

'

4,667,000

'

0

'

'

'

4,667,000

0

'

Distributions

-4,069,000

-4,041,000

-16,645,000

4,134,000

'

'

-309,000

'

'

700,000

'

600,000

'

'

'

'

'

'

Temporary Equity Accretion Preferred Unit In-kind Distribution

'

'

'

'

'

'

'

'

'

$696,000

'

$1,255,000

'

'

'

$696,000

$1,255,000

$25,000

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%

'

'

'

'

'

'

'

'

Number of common units to be issued on conversion of one preferred unit

'

'

'

'

'

'

'

'

'

1

'

'

'

'

'

'

'

'

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

'

'

'

'

'

'

'

'

'

0.4

'

'

'

'

'

'

'

'

Number of succeeding quarters relating to estimated quarterly distributions used for determination of conversion of preferred units

'

'

'

'

'

'

'

'

'

4

'

'

'

'

'

'

'

'

Trailing period considered for the conversion of units

'

'

'

'

'

'

'

'

'

'30 days

'

'

'

'

'

'

'

'

Percentage of the daily volume-weighted average trading price of the common units that the Unit Purchase Price must exceed in order for the units to be convertible

'

'

'

'

'

'

'

'

'

130.00%

'

'

'

'

'

'

'

'

Number of common units from which the average daily trading volume of common units must exceed for trailing period in order for the units to be convertible

'

'

'

'

'

'

'

'

'

40,000

'

'

'

'

'

'

'

'

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

'

'

'

'

'

'

'

'

'

110.00%

'

'

'

'

'

'

'

'

PARTNERS_CAPITAL_Details

PARTNERS' CAPITAL (Details) (USD $)	9 Months Ended						3 Months Ended
In Millions, except Share data, unless otherwise specified	Sep. 30, 2013	Nov. 13, 2013	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2013	Jun. 30, 2013	15-May-13	Apr. 12, 2013	Dec. 31, 2012
		Common Units	Common Units	Common Units	Subordinated Units	Subordinated Units	General Partner	General Partner	General Partner	General Partner	General Partner
Entity Common Stock, Shares Outstanding	'	12,267,019	12,222,692	'	'	'	'	'	'	'	'
Limited Partner, units issued	'	'	12,222,692	12,213,713	12,213,713	12,213,713	'	'	'	'	'
Limited Partner, units authorized	'	'	'	13,963,713	'	12,213,713	'	'	'	'	'
General Partner, units outstanding	'	'	'	'	'	'	534,638	'	'	'	498,518
Capital contribution	'	'	'	'	'	'	$0.80	$0.80	'	'	'
Issue of additional general partner unit	'	'	'	'	'	'	35,000	35,000	5,075	29,925	'
Ownership interest held by general partners (as a percent)	2.00%	'	'	'	'	'	2.00%	2.00%	'	'	'

UNIT_BASED_COMPENSATION_Detail

UNIT BASED COMPENSATION (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Weighted-average grant date fair value	'	'	'	'
Unit-based compensation	$552,000	$147,000	$1,645,000	$293,000
Incentive Plan	'	'	'	'
Unit based compensation	'	'	'	'
Vesting period	'	'	'3 years	'
Weighted-average grant date fair value	'	'	'	'
Fair value	'	'	2,400,000	'
Unamortized compensation expense	$4,100,000	'	$4,100,000	'
Period of amortization of compensation expense	'	'	'3 years	'
Units available for issuance (in shares)	1,508,421	'	1,508,421	'
Incentive Plan | Phantom units	'	'	'	'
Units	'	'	'	'
Unvested at the beginning of the period (in shares)	'	'	144,500	'
Granted units (in shares)	'	'	110,279	'
Forfeited units (in shares)	'	'	-13,200	'
Vested units (in shares)	'	'	-8,979	'
Unvested at the end of the period (in shares)	232,600	'	232,600	'
Weighted-average grant date fair value	'	'	'	'
Unvested at the beginning of the period (in dollars per unit)	'	'	$23.01	'
Granted units (in dollars per unit)	'	'	$22	'
Forfeited units (in dollars per unit)	'	'	$22.53	'
Vested units (in dollars per unit)	'	'	$19.83	'
Unvested at the end of the period (in dollars per unit)	$22.56	'	$22.56	'

REVENUES_Details

REVENUES (Details) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Revenues [Abstract]	'	'	'	'
Sales of natural gas	$99,483	$80,290	$304,343	$217,484
Sales of NGLs and condensate	45,916	26,487	112,128	94,133
Transportation, gathering and processing fees	15,124	11,290	42,644	32,573
Other	106	83	468	279
Total revenues	$160,629	$118,150	$459,583	$344,469

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, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
	item		item
Top ten customers	'	'	'	'
Consolidated revenue concentration	'	'	'	'
Number of top customers	10	'	10	'
Concentration risk percentage	69.10%	59.00%	58.80%	66.00%
Sherwin Alumina Company	'	'	'	'
Consolidated revenue concentration	'	'	'	'
Concentration risk percentage	12.00%	12.20%	12.30%	10.80%
Dow Hydrocarbons & Resources LLC	'	'	'	'
Consolidated revenue concentration	'	'	'	'
Concentration risk percentage	13.10%	'	'	'
Formosa Hydrocarbons Co., Inc.	'	'	'	'
Consolidated revenue concentration	'	'	'	'
Concentration risk percentage	'	16.30%	'	24.80%

SUBSEQUENT_EVENTS_Details

SUBSEQUENT EVENTS (Details) (USD $)	9 Months Ended	3 Months Ended		0 Months Ended
	Sep. 30, 2013	Sep. 30, 2013	Jun. 30, 2013	Jul. 29, 2013	Jul. 29, 2013
		General Partner interest	General Partner interest	Subsequent event	Subsequent event
				Cash	In-kind
Subsequent events	'	'	'	'	'
Distribution per common and subordinated unit (in dollars per unit)	'	'	'	$0.40	'
Series A Preferred Unit and general partner unit distribution (in dollars per unit)	'	'	'	'	$0.40
Ownership interest held by general partners (as a percent)	2.00%	2.00%	2.00%	'	'