CNX Midstream Partners (CNXM) 10-Q 11 May 15 2015 Q1 Quarterly report Financial data

Document_and_Entity_Informatio

Document and Entity Information Document	3 Months Ended
	Mar. 31, 2015	Apr. 15, 2015
Entity Registrant Name	CONE Midstream Partners LP
Entity Central Index Key	1610418
Current Fiscal Year End Date	-19
Entity Filer Category	Non-accelerated Filer
Document Type	10-Q
Document Period End Date	31-Mar-15
Document Fiscal Year Focus	2015
Document Fiscal Period Focus	Q1
Amendment Flag	FALSE
Common Units
Entity Common Stock, Shares Outstanding		29,163,121
Subordinated Units
Entity Common Stock, Shares Outstanding		29,163,121

Statements_of_Operations

Statements of Operations (USD $)	3 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Mar. 31, 2015		Mar. 31, 2014
Revenue
Gathering Revenue — Related Party	$43,168		$24,106
Total Revenue	43,168		24,106
Expenses
Operating Expense — Third Party	8,530		5,346
Operating Expense — Related Party	7,044		6,630
General and Administrative Expense — Third Party	1,342		821
General and Administrative Expense — Related Party	1,977		241
Depreciation Expense	2,994		1,618
Interest Expense	65		0
Total Expense	21,952		14,656
Net Income	21,216		9,450
Less: Net Income Attributable to Noncontrolling Interest	7,004		0
Net Income Attributable to General and Limited Partner Ownership Interest in CONE Midstream Partners LP	14,212		9,450
Net Income Attributable to General and Limited Partner Ownership Interest in CONE Midstream Partners LP	14,212	[1]	9,450
Less: General Partner Interest in Net Income	284
Limited Partner Interest in Net Income	$13,928
Net Income per Limited Partner Unit - Basic	$0.24
Net Income per Limited Partner Unit - Diluted	$0.24
Limited Partner Units Outstanding - Basic	58,326
Limited Partner Unit Outstanding - Diluted	58,360
Distribution Made to Limited Partner, Distributions Declared, Per Unit	$0.21	[2]
[1]	Reflective of general and limited partner interest in net income since closing of the IPO. See Note 1 - Description of Business, Initial Public Offering and Basis of Presentation
[2]	Represents the cash distributions declared related to the period presented. See Note 15.

Balance_Sheets

Balance Sheets (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified
Current Assets:
Cash	$460	$3,252
Receivables — Related Party	41,771	58,749
Prepaid Expenses	1,068	1,280
Inventory	16,632	0
Other Current Assets	164	164
Total Current Assets	60,095	63,445
Property and Equipment:
Property and Equipment	678,904	639,735
Less — Accumulated Depreciation	19,890	16,989
Property and Equipment — Net	659,014	622,746
Other Non-Current Assets	572	613
TOTAL ASSETS	719,681	686,804
Current Liabilities:
Accounts Payable	57,892	70,635
Accounts Payable — Related Party	2,072	2,106
Total Current Liabilities	59,964	72,741
Other Liabilities:
MLP Revolver	7,500	31,300
Total Liabilities	67,464	104,041
Partners' Capital:
Capital Attributable to CONE Midstream Partners LP	295,079	293,555
Noncontrolling Interest	357,138	289,208
Total Partners' Capital	652,217	582,763
TOTAL LIABILITIES AND PARTNERS' CAPITAL	719,681	686,804
Common Units
Partners' Capital:
Limited partners' capital	390,408	389,612
Subordinated Units
Partners' Capital:
Limited partners' capital	-91,585	-92,285
General Partner
Partners' Capital:
General Partner Interest	($3,744)	($3,772)

Balance_Sheets_Balance_Sheet_P

Balance Sheets Balance Sheet Parenthetical	Mar. 31, 2015	Dec. 31, 2014
Common Units
Common units issued	29,163,121	29,163,121
Common units outstanding	29,163,121	29,163,121
Subordinated Units
Common units issued	29,163,121	29,163,121
Common units outstanding	29,163,121	29,163,121

Statement_of_Partners_Capital

Statement of Partners' Capital (USD $)	Total	Partners' Capital	Partners' Capital	Partners' Capital	Noncontrolling Interest
In Thousands, unless otherwise specified		Limited Partner	Limited Partner	General Partner
		Common Units	Subordinated Units
Partners' Capital, beginning balance at Dec. 31, 2014	$582,763	$389,612	($92,285)	($3,772)	$289,208
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	21,216	6,964	6,964	284	7,004
Investment by Partners and Noncontrolling Interest Holders	60,926				60,926
Distribution of Proceeds	-12,784	-6,264	-6,264	-256
Unit Based Compensation	96	96
Partners' Capital, ending balance at Mar. 31, 2015	$652,217	$390,408	($91,585)	($3,744)	$357,138

Statements_of_Cash_Flows

Statements of Cash Flows (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Cash Flows from Operating Activities:
Net Income	$21,216	$9,450
Adjustments to Reconcile Net Income to Net Cash Provided By Operating Activities:
Depreciation	2,994	1,618
Unit Based Compensation	96	0
Changes in Operating Assets:
Receivables — Related Party	3,462	-556
Inventory	-18,872	0
Other Current Assets	212	0
Non-Current Assets	41	0
Changes in Operating Liabilities:
Accounts Payable	1,256	9,695
Accounts Payable — Related Party	-199	528
Net Cash Provided by Operating Activities	10,206	20,735
Cash Flows from Investing Activities:
Capital Expenditures	-61,806	-47,304
Net Cash Used in Investing Activities	-61,806	-47,304
Cash Flows from Financing Activities:
Partners' Investments	85,392	24,000
Distribution of Proceeds	-12,784	0
Payment of Revolver	-23,800	0
Net Cash Provided By Financing Activities	48,808	24,000
Net Decrease in Cash	-2,792	-2,569
Cash at Beginning of Period	3,252	5,976
Cash at End of Period	$460	$3,407

Description_of_Business_Initia

Description of Business, Initial Public Offering and Basis of Presentation	3 Months Ended
	Mar. 31, 2015
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Description of Business, Initial Public Offering and Basis of Presentation	DESCRIPTION OF BUSINESS, INITIAL PUBLIC OFFERING AND BASIS OF PRESENTATION
	Description of Business:
	CONE Midstream Partners LP (the “Partnership”) is a master limited partnership formed in May 2014 by CONSOL Energy Inc. (NYSE: CNX) (“CONSOL”) and Noble Energy, Inc. (NYSE: NBL) (“Noble Energy”), whom we refer to collectively as our Sponsors, to own, operate, develop and acquire natural gas gathering and other midstream energy assets to service our Sponsors’ production in the Marcellus Shale in Pennsylvania and West Virginia. Our assets included natural gas gathering pipelines and compression and dehydration facilities, as well as condensate gathering, collection, separation and stabilization facilities.
	In order to effectively manage our business we have divided our current midstream assets among three separate categories that we refer to as our “Anchor Systems,” “Growth Systems” and “Additional Systems” based on their relative current cash flows, growth profiles, capital expenditure requirements and the timing of their development.
	•	Our Anchor Systems include our midstream systems that generate the substantial majority of our current cash flows and that we expect to drive our growth over the near term as we increase average throughput on these systems from our Sponsors’ growing production.
	•	Our Growth Systems include our high-growth, developing gathering systems that will require substantial expansion capital expenditures over the next several years, the substantial majority of which will be funded by our Sponsors in proportion to their retained ownership interest.
	•	Our Additional Systems include several gathering systems primarily located in the wet gas regions of our Sponsors dedicated acreage that we expect will generate stable cash flows and require lower levels of expansion capital investment over the next several years.
	On September 30, 2014, the Partnership closed its initial public offering ("IPO") of common units representing limited partner interests. The Partnership's general partner is CONE Midstream GP LLC (the "general partner"), a wholly owned subsidiary of CONE Gathering LLC (“CONE Gathering”). CONE Gathering, a Delaware limited liability company, is a joint venture formed by our Sponsors in September 2011. CONE Gathering represents the predecessor for accounting purposes (the “Predecessor”) of CONE Midstream Partners LP. References in these consolidated financial statements to “our partnership,” “we,” “our,” “us” or like terms, when used for periods prior to the IPO, refer to CONE Gathering. References in these consolidated financial statements to “our partnership,” “we,” “our,” “us” or like terms, when used for periods beginning at or following the IPO, refer collectively to the Partnership and its consolidated subsidiaries. For periods prior to the IPO, the accompanying consolidated financial statements and related notes include the assets, liabilities and results of operations of CONE Gathering.
	In order to maintain operational flexibility, our operations are conducted through, and our operating assets are owned by, our operating subsidiaries. However, neither we nor our operating subsidiaries have any employees. Our general partner has the sole responsibility for providing the personnel necessary to conduct our operations, whether through directly hiring employees or by obtaining the services of personnel employed by our Sponsors or others. All of the personnel that conduct our business are employed or contracted by our general partner and its affiliates, including our Sponsors, but we sometimes refer to these individuals as our employees because they provide services directly to us.
	Initial Public Offering:
	On September 30, 2014, the Partnership closed its IPO of 20,125,000 common units at a price to the public of $22.00 per unit, which included 2,625,000 common units issued pursuant to the underwriters' exercise in full of their over-allotment option. The Partnership’s common units are listed on the New York Stock Exchange under the ticker symbol “CNNX.”
	Concurrent with the closing of the IPO, CONE Gathering contributed to the Partnership a 75% controlling interest in the Anchor Systems, a 5% controlling interest in the Growth Systems and a 5% controlling interest in the Additional Systems. In exchange for CONE Gathering's contribution of assets and liabilities to the Partnership, CONE Gathering received:
	•	through its ownership of our general partner, a continuation of a 2% general partner interest in the partnership;
	•	9,038,121 common units and 29,163,121 subordinated units, representing an aggregate 64.2% limited partner interest in the Partnership (the common and subordinated units were subsequently distributed to the Sponsors);
	•	through its ownership of our general partner, all of the Partnerships' incentive distribution rights ("IDRs"); and
	•	an aggregate cash distribution of $407,971.
	Basis of Presentation:
	The accompanying unaudited consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States (“GAAP”). To conform to these accounting principles, management makes estimates and assumptions that affect the amounts reported in the consolidated financial statements and the notes thereto. These estimates are evaluated on an ongoing basis, utilizing historical experience and other methods considered reasonable under the particular circumstances. Although these estimates are based on management’s best available knowledge at the time, changes in facts and circumstances or discovery of new facts or circumstances may result in revised estimates and actual results may differ from these estimates. Effects on the Partnership’s business, financial position and results of operations resulting from revisions to estimates are recognized when the facts that give rise to the revision become known.
	The balance sheet at December 31, 2014 has been derived from the audited financial statements at that date but does not include all of the information and footnotes required by GAAP for complete financial statements.

Significant_Accounting_Policie

Significant Accounting Policies	3 Months Ended
	Mar. 31, 2015
Accounting Policies [Abstract]
Significant Accounting Policies	SIGNIFICANT ACCOUNTING POLICIES
	A summary of the significant accounting policies is included below. These, together with the other notes to the Financial Statements, are an integral part of the Financial Statements.
	Under the Jumpstart Our Business Startups Act ("JOBS Act"), for as long as the Partnership remains an “emerging growth company” as defined in the JOBS Act, we may take advantage of certain exemptions from the SEC's reporting requirements that are applicable to other public companies that are not emerging growth companies, including not being required to provide an auditor’s attestation report on management’s assessment of the effectiveness of its system of internal control over financial reporting pursuant to Section 404 of the Sarbanes-Oxley Act, reduced disclosure obligations regarding executive compensation in our periodic reports, and exemptions from the requirements of holding a nonbinding advisory vote on executive compensation and seeking unitholder approval of any golden parachute payments not previously approved. We may take advantage of these reporting exemptions until we are no longer an emerging growth company.
	The Partnership will remain an emerging growth company for up to five years, although we will lose that status sooner if:
	•	we have more than $1,000,000 of revenues in a fiscal year;
	•	the limited partner interests held by non-affiliates have a market value of more than $700,000; or
	•	we issue more than $1,000,000 of non-convertible debt over a three-year period.
	The JOBS Act also provides that an emerging growth company can delay adopting new or revised accounting standards until such time as those standards apply to private companies. The Partnership irrevocably elected to “opt out” of this exemption and, therefore, is and will be subject to the same new or revised accounting standards as other public companies that are not emerging growth companies.
	Principles of Consolidation:
	The consolidated financial statements include the accounts of CONE Midstream Partners LP and all of its subsidiaries. Transactions between the Partnership and its Sponsors have been identified in the consolidated financial statements as transactions between related parties and are discussed in Note 4.
	Use of Estimates:
	The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets, liabilities, revenues and expenses, and various disclosures. Actual results could differ from those estimates.
	Accounts Receivable:
	Accounts receivable are recorded at the invoiced amount and do not bear interest. We reserve for specific accounts receivable when it is probable that all or a part of an outstanding balance will not be collected, such as customer bankruptcies. Collectability is determined based on terms of sale, credit status of customers and various other circumstances. We regularly review collectability and establish or adjust the allowance as necessary using the specific identification method. Account balances are charged off against the allowance after all means of collection have been exhausted and the potential for recovery is considered remote. There were no reserves for uncollectible amounts in the periods presented.
	Inventory:
	Inventory is stated at the lower of cost or market. Inventory consists of pipe purchased for a pipeline project that has been delayed.  The cost is determined primarily under the specific identification method.  The pipe will be used in an alternative project or sold to a third party.
	Property and Equipment:
	Property and equipment is recorded at cost upon acquisition. Expenditures which extend the useful lives of existing property and equipment are capitalized.
	When properties are retired or otherwise disposed, the related cost and accumulated depreciation are removed from the respective accounts and any profit or loss on disposition is recognized as gain or loss. There were no retirements or disposals during the periods presented.
	The Partnership evaluates whether long-lived assets have been impaired and determines if the carrying amount of its assets may not be recoverable. For such long-lived assets, impairment exists when the carrying amount of an asset exceeds estimates of the undiscounted cash flows expected to result from the use and eventual disposition of the asset. If the carrying amount of the long-lived asset is not recoverable, based on the estimated future undiscounted cash flows, the impairment loss is measured as the excess of the asset’s carrying amount over its estimated fair value, such that the asset’s carrying amount is adjusted to its estimated fair value with an offsetting charge to operating expense.
	Fair value represents the estimated price between market participants to sell an asset in the principal or most advantageous market for the asset, based on assumptions a market participant would make. When warranted, management assesses the fair value of long-lived assets using commonly accepted techniques and may use more than one source in making such assessments. Sources used to determine fair value include, but are not limited to, recent third-party comparable sales, internally developed discounted cash flow analyses and analyses from outside advisors. Significant changes, such as the condition of an asset or management’s intent to utilize the asset generally require management to reassess the cash flows related to long-lived assets. No impairments were identified during the periods presented.
	Depreciation of property and equipment is calculated on the straight-line method over their estimated useful lives or lease terms.
	Variable Interest Entities:
	The Anchor, Growth and Additional Limited Partnerships (the Limited Partnerships), which are variable interest entities, are consolidated by CONE Midstream Partners LP through its ownership of CONE Midstream Operating Company LLC. CONE Midstream Operating Company LLC, through its general partner ownership interest in each of the Anchor, Growth and Additional Limited Partnerships, has the power to direct all substantive strategic and day-to-day operational decisions of the Limited Partnerships. CONE Midstream Operating Company LLC is considered to be the primary beneficiary for accounting purposes.
	Revenue Recognition:
	Revenues are recognized for the transportation of natural gas and other hydrocarbons based on the delivery of actual volumes transported at a contracted throughput rate. Operating fees received are recorded in gathering revenue — related party in the period the service is performed.
	Environmental Matters:
	We are subject to various federal, state and local laws and regulations relating to the protection of the environment. We have established procedures for the ongoing evaluation of our operations, to identify potential environmental exposures and to comply with regulatory policies and procedures, including legislation related to greenhouse gas emissions. Environmental expenditures that relate to current operations are expensed or capitalized as appropriate. Expenditures that relate to an existing condition caused by past operations, and do not contribute to current or future revenue generation, are expensed. Liabilities are recorded when environmental assessments and/or clean-ups are probable, and the costs can be reasonably estimated. At this time, we are unable to assess the timing and/or effect of potential liabilities related to greenhouse gas emissions or other environmental issues. As of March 31, 2015, we had no material environmental matters that required specific disclosure or requiring the recognition of a liability.
	Asset Retirement Obligation:
	We perform an ongoing analysis of asset removal and site restoration costs that we may be required to perform under law or contract once an asset has been permanently taken out of service. We have property and equipment at locations that we own and at sites leased or under right of way agreements. We are under no contractual obligation to remove the assets at locations we own. In evaluating our asset retirement obligation, we review lease agreements, right of way agreements, easements and permits to determine which agreements, if any, require an asset removal and restoration obligation. Determination of the amounts to be recognized is based upon numerous estimates and assumptions, including expected settlement dates, future retirement costs, future inflation rates and the credit-adjusted-risk-free interest rates. We operate and maintain our midstream systems and intend to do so as long as supply and demand for natural gas exists, which we expect for the foreseeable future. Therefore, we believe that we cannot reasonably estimate the asset retirement obligations for our midstream system assets as these assets have indeterminate lives.
	Income Taxes:
	Our operations as a limited partnership, and our Predecessor, as a limited liability company, are treated as partnerships for federal and state income tax purposes, with each partner being separately taxed on its share of the taxable income. Accordingly, no provision for federal or state income taxes has been recorded.
	Net Income per Limited Partners Unit:
	We allocate our net income among our general partner and limited partners using the two-class method in accordance with applicable authoritative accounting guidance. Under the two-class method, we allocate our net income to our limited partners, our general partner and the holders of our IDRs in accordance with the terms of our partnership agreement. We also allocate any earnings in excess of distributions to our limited partners, our general partner and the holders of the IDRs in accordance with the terms of our partnership agreement. We allocate any distributions in excess of earnings for the period to our general partner and our limited partners based on their respective proportionate ownership interests in us, after taking into account distributions to be paid with respect to the IDRs, as set forth in our partnership agreement.
	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 subject to performance or market conditions should be included in the diluted net income per limited partner unit calculation, the impact is reflected by applying the treasury stock method. Potentially dilutive securities included in the calculation of diluted net income per limited partner unit totaled 33,697 phantom units for the three months ended March 31, 2015.
	Our partnership agreement requires that, within 45 days after the end of each quarter, the Partnership distribute all of its available cash (described below) to unitholders of record on the applicable record date.
	Cash Distributions:
	Our partnership agreement requires that we distribute all of our available cash quarterly. This requirement forms the basis of our cash distribution policy and reflects a basic judgment that our unitholders will be better served by distributing our available cash rather than retaining it because, among other reasons, we believe we will generally finance any expansion capital expenditures from external financing sources. Under our current cash distribution policy, we intend to make a minimum quarterly distribution to the holders of our common units and subordinated units of $0.2125 per unit, or $0.85 per unit on an annualized basis, to the extent we have sufficient available cash after the establishment of cash reserves and the payment of costs and expenses, including the payment of expenses to our general partner. However, other than the requirement in our partnership agreement to distribute all of our available cash each quarter, we have no legal obligation to make quarterly cash distributions in this or any other amount, and the board of directors of our general partner has considerable discretion to determine the amount of our available cash each quarter. In addition, the board of directors of our general partner may change our cash distribution policy at any time, subject to the requirement in our partnership agreement to distribute all of our available cash quarterly.
	Generally, our available cash is the sum of (i) all cash on hand at the end of a quarter after the payment of our expenses and the establishment of cash reserves and (ii) if the board of directors of our general partner so determines, all or any portion of additional cash on hand resulting from working capital borrowings made after the end of the quarter.
	The following table illustrates the percentage allocations of available cash from operating surplus between the unitholders and our general partner based on the specified target distribution levels. The amounts set forth under “Marginal Percentage Interest in Distributions” are the percentage interests of our general partner and the unitholders in any available cash from operating surplus we distribute up to and including the corresponding amount in the column “Total Quarterly Distribution Per Unit Target Amount.” The percentage interests shown for our unitholders and our general partner for the minimum quarterly distribution are also applicable to quarterly distribution amounts that are less than the minimum quarterly distribution.
	The percentage interests set forth below for our general partner include its 2% general partner interest and assume that our general partner has contributed any additional capital necessary to maintain its 2% general partner interest, our general partner has not transferred its incentive distribution rights and there are no arrearages on common units.
					Marginal Percentage Interest in
					Distributions
	Distribution Targets		Total Quarterly Distribution		Unitholders	General Partner
			Per Unit Target Amount
	Minimum Quarterly Distribution			$0.21	98%	2%
	First Target Distribution		Above $0.2125	up to $0.24438	98%	2%
	Second Target Distribution		Above $0.24438	up to $0.26563	85%	15%
	Third Target Distribution		Above $0.26563	up to $0.31875	75%	25%
	Thereafter		Above $0.31875		50%	50%
	Subordinated Units:
	Our partnership agreement provides that, during the subordination period, the common unitholders will have the right to receive distributions of available cash from operating surplus each quarter in an amount equal to $0.2125 per unit, which amount is defined in our partnership agreement as the minimum quarterly distribution, plus any arrearages in the payment of the minimum quarterly distribution on the common units from prior quarters, before any distributions of available cash from operating surplus may be made on the subordinated units. The practical effect of the subordinated units is to increase the likelihood that, during the subordination period, there will be available cash to be distributed on the common units. The subordination period will end, and the subordinated units will convert to common units, on a one-for-one basis, when certain distribution requirements, as defined in the partnership agreement, have been met. The earliest date at which the subordination period may end is September 30, 2015.
	Incentive Distribution Rights:
	All of the IDRs are currently held by CONE Midstream GP LLC, our general partner. Incentive distribution rights represent the right to receive an increasing percentage (13.0%, 23.0% and 48.0%) of quarterly distributions of available cash from operating surplus after the minimum quarterly distribution and the target distribution levels described below have been achieved. Our general partner may transfer the IDRs separately from its general partner interest.
	The following discussion assumes that our general partner maintains its 2% general partner interest and that our general partner continues to own the IDRs.
	If for any quarter:
	•	we have distributed available cash from operating surplus to the common unitholders and subordinated unitholders in an amount equal to the minimum quarterly distribution; and
	•	we have distributed available cash from operating surplus on outstanding common units in an amount necessary to eliminate any cumulative arrearages in payment of the minimum quarterly distribution;
	then, we will distribute any additional available cash from operating surplus for that quarter among the unitholders and our general partner in the following manner:
	•	first, 98% to all unitholders, pro rata, and 2% to our general partner, until each unitholder receives a total of $0.24438 per unit for that quarter (the “first target distribution”);
	•	second, 85% to all unitholders, pro rata, and 15% to our general partner, until each unitholder receives a total of $0.26563 per unit for that quarter (the “second target distribution”);
	•	third, 75% to all unitholders, pro rata, and 25% to our general partner, until each unitholder receives a total of $0.31875 per unit for that quarter (the “third target distribution”); and
	•	thereafter, 50% to all unitholders, pro rata, and 50% to our general partner.
	Reclassifications
Certain amounts in prior periods have been reclassified to conform with the current reporting classifications with no effect on previously reported net income or partners' capital.
Recent Accounting Pronouncements
In April 2015, the FASB issued ASU 2015-3 “Interest - Imputation of Interest: Simplifying the Presentation of Debt Issuance Costs” (ASU 2015-3). ASU 2015-3 simplifies the presentation of debt issuance costs by requiring such costs be presented as a deduction from the corresponding debt liability. The guidance is effective for financial statements issued for reporting periods beginning after December 15, 2015 and interim periods within the reporting periods and requires retrospective presentation. We will adopt the standard in the first quarter of 2016. The Partnership believes adoption of this new guidance will not have a material impact on CONE Midstream's financial statements.
In May 2014, the Financial Accounting Standards Board issued Update 2014-09 - Revenue from Contracts with Customers (Topic 606). The objective of the amendments in this update is to improve financial reporting by creating common revenue recognition guidance for U.S. GAAP and International Financial Reporting Standards (IFRS). The guidance in this update supersedes the revenue recognition requirements in Topic 605, Revenue Recognition, and most industry-specific guidance throughout the Industry Topics of the Codification. The core principle of the guidance is that an entity should recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. An entity should disclose sufficient information, both qualitative and quantitative, to enable users of financial statements to understand the nature, amount, timing, and uncertainty of revenue and cash flows arising from contracts with customers. The amendments in this update are effective for annual reporting periods beginning after December 15, 2017, including interim periods within that reporting period. Early application is not permitted. We are currently evaluating the method of adoption and impact that this new guidance will have on our financial statements.

Net_Income_per_Limited_Partner

Net Income per Limited Partner and General Partner Interest	3 Months Ended
	Mar. 31, 2015
Earnings Per Share [Abstract]
Net Income per Limited Partner and General Partner Interest	NET INCOME PER LIMITED PARTNER AND GENERAL PARTNER INTEREST
	The following table illustrates the Partnership’s calculation of net income per unit for common and subordinated partner units (in thousands, except per unit information):
		March 31,
		2015
	Net Income Attributable to General and Limited Partner Ownership Interest in CONE Midstream Partners LP	$	14,212
	Less: General Partner Interest in Net Income	284
	Limited Partner Interest in Net Income	$	13,928
	Net Income Allocable to Common Units	$	6,964
	Net Income Allocable to Subordinated Units	6,964
	Limited Partner Interest in Net Income	$	13,928
	Weighted Average Limited Partner Units Outstanding — Basic
	Common Units	29,163
	Subordinated Units	29,163
	Total	58,326
	Weighted Average Limited Partner Units Outstanding — Diluted
	Common Units	29,197
	Subordinated Units	29,163
	Total	58,360
	Net Income Per Limited Partner Unit — Basic and Diluted
	Common Units	$	0.24
	Subordinated Units	$	0.24

Related_Party

Related Party	3 Months Ended
	Mar. 31, 2015
Related Party Transactions [Abstract]
Related Party	RELATED PARTY
	In the ordinary course of business, the Partnership has transactions with related parties. Related parties during each of the periods presented included CONSOL and certain of its subsidiaries and Noble Energy.
	We provide natural gas gathering and compression services to CONSOL and Noble Energy resulting in affiliate transactions.
	Transactions with related parties, other than certain transactions with CONSOL related to administrative services, were conducted on terms which management believes are comparable to those with unrelated parties. We believe that these costs would not have been materially different had they been calculated on a stand-alone basis.
	Charges for services from CONSOL included in operating expenses — related party were $7,044 and $6,630 and general and administrative expenses — related party were $1,836 and $241 for the three months ended March 31, 2015 and 2014, respectively. Charges from Noble Energy for general and administrative expenses — related party were $141 for the three months ended March 31, 2015. There were no similar charges from Noble Energy for the three months ended March 31, 2014.
	Purchases of supply inventory from a CONSOL subsidiary were $1,435 for the three months ended March 31, 2014 and were included in operating expenses — related party. There were no related party purchases of supply inventory from CONSOL for the three months ended March 31, 2015.
	Omnibus Agreement
	Concurrent with closing the IPO, we entered into an omnibus agreement with CONSOL, Noble Energy, CONE Gathering and our general partner that addresses the following matters:
	•	our payment of an annual administrative support fee, initially in the amount of $0.6 million (prorated for the first year of service), for the provision of certain services by CONSOL and its affiliates;
	•	our payment of an annual administrative support fee, initially in the amount of approximately $0.6 million (pro rated for the first year of service), for the provision of certain executive services by CONSOL and its affiliates;
	•	our payment of an annual administrative support fee, initially in the amount of approximately $0.2 million (pro rated for the first year of service), for the provision of certain executive services by Noble Energy and its affiliates;
	•	our obligation to reimburse our Sponsors for all other direct or allocated costs and expenses incurred by our Sponsors in providing general and administrative services (which reimbursement is in addition to certain expenses of our general partner and its affiliates that are reimbursed under our partnership agreement);
	•	our right of first offer to acquire (i) CONE Gathering’s retained interests in each of our Anchor Systems, Growth Systems and Additional Systems, (ii) CONE Gathering’s other ancillary midstream assets and (iii) any additional midstream assets that CONE Gathering develops; and
	•	an indemnity from CONE Gathering for liabilities associated with the use, ownership or operation of our assets, including environmental liabilities, to the extent relating to the period of time prior to the closing of the IPO; and our obligation to indemnify CONE Gathering for events and conditions associated with the use, ownership or operation of our assets that occur after the closing of the IPO, including environmental liabilities.
	So long as CONE Gathering controls our general partner, the omnibus agreement will remain in full force and effect. If CONE Gathering ceases to control our general partner, either party may terminate the omnibus agreement, provided that the indemnification obligations will remain in full force and effect in accordance with their terms.
	Operational Services Agreement
	Concurrent with closing of the IPO, we entered into an operational services agreement with CONSOL under which CONSOL provides certain operational services to us in support of our gathering pipelines and dehydration, treating and compressor stations and facilities, including routine and emergency maintenance and repair services, routine operational activities, routine administrative services, construction and related services and such other services as we and CONSOL may mutually agree upon from time to time. CONSOL will prepare and submit for our approval a maintenance, operating and capital budget on an annual basis. CONSOL will submit actual expenditures for reimbursement on a monthly basis and we will reimburse CONSOL for any direct third-party costs actually incurred by CONSOL in providing these services.
	The operational services agreement has an initial term of 20 years and will continue in full force and effect unless terminated by either party at the end of the initial term or any time thereafter by giving not less than six months’ prior notice to the other party of such termination. CONSOL may terminate the operational services agreement if (1) we become insolvent, declare bankruptcy or take any action in furtherance of, or indicating our consent to, approval of, or acquiescence in, a similar proceeding or (2) upon not less than 180 days notice. We may immediately terminate the agreement (1) if CONSOL becomes insolvent, declares bankruptcy or takes any action in furtherance of, or indicating its consent to, approval of, or acquiescence in, a similar proceeding, (2) upon a finding of CONSOL’s willful misconduct or gross negligence that has had a material adverse effect on any of our gathering pipelines and dehydration, treating and compressor stations and facilities or our business or (3) CONSOL is in material breach of the operational services agreement and fails to cure such default within 45 days.
	Under the operational services agreement, CONSOL will indemnify us from any claims, losses or liabilities incurred by us, including third-party claims, arising from CONSOL’s performance of the agreement to the extent caused by CONSOL’s gross negligence or willful misconduct. We will indemnify CONSOL from any claims, losses or liabilities incurred by CONSOL, including any third-party claims, arising from CONSOL’s performance of the agreement, except to the extent such claims, losses or liabilities are caused by CONSOL’s gross negligence or willful misconduct.
	Gathering Agreements
	CNX Gas Gathering Agreement
	On September 30, 2014, in connection with the closing of the IPO, the Partnership entered into a Gathering Agreement (the “CNX Gas Gathering Agreement”) by and between the Partnership, as gatherer, and CNX Gas Company LLC (“CNX Gas”), a wholly owned subsidiary of CONSOL, as shipper. Under the CNX Gas Gathering Agreement, CNX Gas (i) dedicated to the Partnership for natural gas midstream services all of its existing acres and any acres acquired in the future, in each case, that are jointly owned with Noble Energy to the extent covering the Marcellus Shale in the dedication area and (ii) granted the Partnership a right of first offer to provide natural gas midstream services with respect to all of its existing acres and any acres acquired in the future, in each case, that are jointly owned with Noble Energy to the extent covering the Marcellus Shale in the right of first offer area.
	The CNX Gas Gathering Agreement commenced on September 30, 2014 and has an initial term of 20 years. Under the CNX Gas Gathering Agreement, if the Partnership fails to timely complete the construction of the facilities necessary to provide midstream services to CNX Gas’ dedicated acreage or has an uncured default of any of the Partnership’s material obligations that has caused an interruption in the Partnership’s services for more than 90 days, the affected acreage will be permanently released from the Partnership’s dedication. Also, after the fifth anniversary of the CNX Gas Gathering Agreement, if CNX Gas drills a well that is located more than a certain distance from the Partnership’s current gathering system (and not included in the detailed drilling plan provided by CNX Gas and Noble Energy) and a third-party gatherer offers a lower cost of services, then the acreage associated with such well will be permanently released from the Partnership’s dedication.
	Under the CNX Gas Gathering Agreement, the Partnership charges a fee based on the type and scope of midstream services provided. For the services provided (a) with respect to natural gas that does not require downstream processing, the Partnership receives a fee of $0.40 per MMBtu, (b) with respect to the natural gas that requires downstream processing, the Partnership receives a fee of $0.55 per MMBtu, except in the Moundsville area (Marshall County, West Virginia), where the fee is $0.275 per MMBtu and in the Pittsburgh International Airport area where the fee is $0.275 per MMBtu and (c) with respect to condensate, the Partnership receives a fee of $5.00 per Bbl in the Majorsville area and $2.50 per Bbl in the Moundsville area.
	NBL Gas Gathering Agreement
	On September 30, 2014, in connection with the closing of the IPO, the Partnership entered into a Gathering Agreement (the “NBL Gas Gathering Agreement”) by and between the Partnership, as gatherer, and Noble Energy, as shipper. Under the NBL Gas Gathering Agreement, Noble Energy (i) dedicated to the Partnership for natural gas midstream services all of its existing acres and any acres acquired in the future, in each case, that are jointly owned with CNX Gas to the extent covering the Marcellus Shale in the dedication area and (ii) granted the Partnership a right of first offer to provide natural gas midstream services with respect to all of its existing acres and any acres acquired in the future, in each case, that are jointly owned with CNX Gas to the extent covering the Marcellus Shale in the right of first offer area.
	The NBL Gas Gathering Agreement commenced on September 30, 2014 and has an initial term of 20 years. Under the NBL Gas Gathering Agreement, if the Partnership fails to timely complete the construction of the facilities necessary to provide midstream services to Noble Energy’s dedicated acreage or has an uncured default of any of the Partnership’s material obligations that has caused an interruption in the Partnership’s services for more than 90 days, the affected acreage will be permanently released from the Partnership’s dedication. Also, after the fifth anniversary of the NBL Gas Gathering Agreement, if Noble Energy drills a well that is located more than a certain distance from the Partnership’s current gathering system (and not included in the detailed drilling plan provided by CNX Gas and Noble Energy) and a third-party gatherer offers a lower cost of services, then the acreage associated with such well will be permanently released from the Partnership’s dedication.
	Under the NBL Gas Gathering Agreement, the Partnership charges a fee based on the type and scope of midstream services provided. For the services provided (a) with respect to natural gas that does not require downstream processing, the Partnership receives a fee of $0.40 per MMBtu, (b) with respect to the natural gas that requires downstream processing, the Partnership receives a fee of $0.55 per MMBtu, except in the Moundsville area (Marshall County, West Virginia), where the fee is $0.275 per MMBtu and in the Pittsburgh International Airport area where the fee is $0.275 per MMBtu and (c) with respect to condensate, the Partnership receives a fee of $5.00 per Bbl in the Majorsville area and $2.50 per Bbl in the Moundsville area.
	Employee Secondment Agreement
	We entered into an employee secondment agreement, effective September 8, 2014, with Noble Energy. Pursuant to the employee secondment agreement, an employee of Noble Energy is seconded to us to provide investor relations and similar functions. We will reimburse Noble Energy for allocable salary, benefits, insurance, payroll taxes and other employment expenses related to the seconded employee.

Concentration_of_Credit_Risk

Concentration of Credit Risk	3 Months Ended
	Mar. 31, 2015
Risks and Uncertainties [Abstract]
Concentration of Credit Risk	CONCENTRATION OF CREDIT RISK
	CONSOL and Noble Energy accounted for 100% of the Partnership’s revenue for the three months ended March 31, 2015 and 2014. Revenues from each Sponsor consisted of the following:
		March 31, 2015		March 31, 2014
	CONSOL	$	22,162	$	12,206
	Noble Energy	21,006		11,900
	Total Revenue	$	43,168	$	24,106

Accounts_Receivable_Related_Pa

Accounts Receivable - Related Party	3 Months Ended
	Mar. 31, 2015
Receivables [Abstract]
Accounts Receivable - Related Party	RECEIVABLES - RELATED PARTY
	Receivables are comprised of related party receivables related to gathering fees and contribution activities and consisted of the following:
		31-Mar-15		31-Dec-14
	Gathering Fees:
	CONSOL	$	7,961	$	7,732
	Noble Energy	13,574		13,697
	Contributions Receivable:
	CONSOL	—		16,141
	Noble Energy	7,770		18,866
	Other:
	CONE Gathering LLC	6,250		2,313
	CONSOL	6,216		—
	Total Receivables — Related Party	$	41,771	$	58,749

Property_and_Equipment

Property and Equipment	3 Months Ended
	Mar. 31, 2015
Property, Plant and Equipment [Abstract]
Property and Equipment	PROPERTY AND EQUIPMENT
		31-Mar-15		31-Dec-14		Estimated Useful
						Lives in Years
	Land	$	57,431	$	47,701	N/A
	Gathering Equipment	383,499		298,897		25 — 40
	Compression Equipment	91,585		91,585		40
	Processing Equipment	30,979		30,979		40
	Assets Under Construction	115,410		170,573		N/A
	Total Property and Equipment	$	678,904	$	639,735
	Less: Accumulated Depreciation
	Gathering	$	11,965	$	9,848
	Compression	5,063		4,486
	Processing	2,862		2,655
	Total Accumulated Depreciation	$	19,890	$	16,989
	Property and Equipment, Net	$	659,014	$	622,746

Accounts_Payable_Related_Party

Accounts Payable - Related Party	3 Months Ended
	Mar. 31, 2015
Payables and Accruals [Abstract]
Accounts Payable- Related Party	ACCOUNTS PAYABLE - RELATED PARTY
	Related party payables consisted of the following:
		31-Mar-15		31-Dec-14
	Accounts Payable — Related Party
	Capital Expenditure Reimbursement to CNX Gas (1)	$	165	$	561
	Expense Reimbursement to CONSOL	1,377		1,016
	General and Administrative Services Provided by CONSOL	485		432
	General and Administrative Services Provided by Noble	45		$	97
	Total Accounts Payable — Related Party	$	2,072	$	2,106
	(1) CNX Gas is a wholly owned subsidiary of CONSOL

Supplemental_Cash_Flow_Informa

Supplemental Cash Flow Information	3 Months Ended
	Mar. 31, 2015
Supplemental Cash Flow Elements [Abstract]
Supplemental Cash Flow Information	SUPPLEMENTAL CASH FLOW INFORMATION
	As of March 31, 2015, we have a receivable of $7,770 related to partners' investments from Noble Energy. Additionally, we have a receivable from CONE Gathering LLC related to capital expenditures of $4,746, a receivable from CONSOL related to inventory of $2,240 and capital project reimbursements of $3,976 as of March 31, 2015. There were no non-cash financing or investing transactions for the three months ended March 31, 2014.

Commitments_and_Contingencies

Commitments and Contingencies	3 Months Ended
	Mar. 31, 2015
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	COMMITMENTS AND CONTINGENCIES
	We may become involved in claims and other legal matters arising in the ordinary course of business. Although claims are inherently unpredictable, we are not aware of any matters that may have a material adverse effect on our business, financial position, results of operations or cash flows.

Leases

Leases	3 Months Ended
	Mar. 31, 2015
Leases, Operating [Abstract]
Leases	LEASES
	Non-Cancellable Leases We have entered into various operating leases primarily related to compression facilities. Future minimum lease payments under operating leases at March 31, 2015 are as follows:
		Minimum Lease Payments
	2015 - 2016	$	6,185
	2016 - 2017	4,531
	2017 - 2018	2,471
	2018 - 2019	183
		$	13,370
	Rental expense under operating leases was $2,072 and $1,015 for the three months ended March 31, 2015 and 2014, respectively. These expenses are included within Operating Expense - Third Party on our Statements of Operations.

Segment_Information

Segment Information	3 Months Ended
	Mar. 31, 2015
Segment Reporting [Abstract]
Segment Information	SEGMENT INFORMATION
	Operating segments are revenue-producing components of the enterprise for which separate financial information is produced internally and is subject to evaluation by the chief operating decision maker in deciding how to allocate resources.
	In order to effectively manage our business we have divided our current midstream assets among three separate categories that we refer to as our “Anchor Systems,” “Growth Systems” and “Additional Systems” based on their relative current cash flows, growth profiles, capital expenditure requirements and the timing of their development.
	All of the Partnership’s operating revenues, income from operations and assets are generated or located in the United States.
		Three Months Ended
		March 31,
		2015		2014
	Gathering Revenue - Related Party:
	Anchor Systems	$	34,533	$	21,241
	Growth Systems	2,975		2,519
	Additional Systems	5,660		—
	Other (1)	—		346
	Total Gathering Revenue - Related Party	$	43,168	$	24,106
	Net Income (Loss):
	Anchor Systems	$	18,787	$	8,747
	Growth Systems	801		723
	Additional Systems	1,628		(162		)
	Other (1)	—		142
	Total Net Income	$	21,216	$	9,450
	Depreciation Expense:
	Anchor Systems	$	2,397	$	1,159
	Growth Systems	444		449
	Additional Systems	153		—
	Other (1)	—		10
	Total Depreciation Expense	$	2,994	$	1,618
	Capital Expenditures for Segment Assets:
	Anchor Systems	$	29,299	$	32,043
	Growth Systems	11,637		4,576
	Additional Systems	20,870		6,493
	Other (1)	—		4,192
	Total Capital Expenditures	$	61,806	$	47,304
	-1	Other consists of assets that are retained by our Predecessor, CONE Gathering, and are thus not part of the transactions that occurred in connection with the closing of the IPO. See Note 1 - Description of Business, Initial Public Offering and Basis of Presentation.
		March 31,		December 31,
		2015		2014
	Segment Assets
	Anchor Systems	$	460,187	$	430,350
	Growth Systems	99,321		119,550
	Additional Systems	160,173		136,904
	Total Segment Assets	$	719,681	$	686,804

Revolving_Credit_Facility

Revolving Credit Facility	3 Months Ended
	Mar. 31, 2015
Debt Disclosure [Abstract]
Revolving Credit Facility	REVOLVING CREDIT FACILITY
	The outstanding balance of our revolving credit facility and interest rates on the amounts drawn from our revolver consist of the following:
			31-Mar-15				31-Dec-14
	(thousands, except percentages)		Debt		Interest Rate		Debt		Interest Rate
	Credit Facility, Due September 30, 2019		$	7,500	3.75	%	$	31,300	3.75	%
	As of March 31, 2015, we had outstanding debt issuance costs of $0.7 million, which were incurred as part of the issuance of this credit facility and are currently being amortized to interest expense. The Partnership recognized $41 to interest expense during the three months ended March 31, 2015 and December 31, 2014.
	At the closing of our IPO on September 30, 2014, we entered into a credit facility agreement which provides for a$250 million unsecured five year revolving credit facility that matures on September 30, 2019. Our revolving credit facility is available for working capital, capital expenditures, certain acquisitions, distributions, unit repurchases and other lawful partnership purposes. Borrowings under our revolving credit facility will bear interest at our option at either:
	•	the base rate, which will be defined as the highest of (i) the federal funds rate plus 0.50%; (ii) JP Morgan’s prime rate; or (iii) the daily LIBOR rate for a one month interest period plus 1.00%; in each case, plus a margin varying from 0.1250% to 1.00% depending on our most recent consolidated total leverage ratio; or
	•	the LIBOR rate plus a margin varying from 1.1250% to 2.00%, in each case, depending on our most recent consolidated leverage ratio (as defined in the agreement governing our revolving credit facility) or our credit rating, as the case may be.
	Interest on base rate loans will be payable quarterly. Interest on LIBOR loans will be payable on the last day of each interest period or, in the case of interest periods longer than three months, every three months. The unused portion of our revolving credit facility will be subject to a commitment fee ranging from 0.15% to 0.35% per annum depending on our most recent consolidated leverage ratio or our credit rating, as the case may be.
	Our revolving credit facility contains covenants and conditions that, among other things, limit our ability to incur or guarantee additional debt, make cash distributions (though there will be an exception for distributions permitted under the partnership agreement, subject to certain customary conditions), incur certain liens or permit them to exist, make certain investments and acquisitions, enter into certain types of transactions with affiliates, merge or consolidate with another company, and transfer, sell or otherwise dispose of assets. We are also subject to covenants that require us to maintain certain financial ratios. For example, we may not permit the ratio of (i) consolidated total funded debt (as defined in the agreement governing our revolving credit facility) as of the last day of each fiscal quarter to (ii) consolidated EBITDA (as defined in the agreement governing our revolving credit facility) for the four consecutive fiscal quarters ending on the last day of such fiscal quarter to exceed (A) at any time other than during a qualified acquisition period (as defined in the agreement governing our revolving credit facility), 5.00 to 1.00 and (B) during a qualified acquisition period, 5.50 to 1.00. In addition, we may not permit the ratio of (i) consolidated EBITDA for the four consecutive fiscal quarters ending on the last day of each fiscal quarter to (ii) consolidated interest expense (as defined in the agreement governing our revolving credit facility) for such four consecutive fiscal quarters to be less than 3.00 to 1.00.

LongTerm_Incentive_Plan

Long-Term Incentive Plan	3 Months Ended
	Mar. 31, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Long-Term Incentive Plan	LONG-TERM INCENTIVE PLAN
	Under the CONE Midstream Partners LP 2014 Long-Term Incentive Plan (our “LTIP”), our general partner may issue long-term equity based awards to directors, officers and employees of our general partner or its affiliates, or to any consultants, affiliates of our general partner or other individuals who perform services for us. These awards will be intended to compensate the recipients thereof based on the performance of our common units and their continued service during the vesting period, as well as to align their long-term interests with those of our unitholders. We will be responsible for the cost of awards granted under our LTIP and all determinations with respect to awards to be made under our LTIP will be made by the board of directors of our general partner or any committee thereof that may be established for such purpose or by any delegate of the board of directors or such committee, subject to applicable law, which we refer to as the plan administrator.
	The LTIP limits the number of units that may be delivered pursuant to vested awards to 5,800,000 common units, subject to proportionate adjustment in the event of unit splits and similar events. Common units subject to awards that are canceled, forfeited, withheld to satisfy exercise prices or tax withholding obligations or otherwise terminated without delivery of the common units will be available for delivery pursuant to other awards.
	On October 3, 2014, we filed a registration statement on Form S-8 under the Securities Act to register all common units issued or reserved for issuance under our LTIP. Common units covered by the registration statement on Form S-8 will be eligible for sale in the public market, subject to applicable vesting requirements and the terms of applicable lock-up agreements.
	The Partnership's general partner has granted equity-based phantom units that vest over a period of continued service with the Partnership. The value of the phantom units will be paid in common units or an amount of cash equal to the fair market value of a unit based on the grant date. The Partnership accounted for these awards as equity awards and recorded compensation expense for the fair value of the awards at the grant date fair value, which totaled $96 for the three months ended March 31, 2015 and is included in general and administrative expense - related party.
	As of March 31, 2015, 33,697 units have been issued under our LTIP. The weighted average fair value of these grants, based on the Partnership's common unit price on the grant date was $19.98.

Subsequent_Events

Subsequent Events	3 Months Ended
	Mar. 31, 2015
Subsequent Events [Abstract]
Subsequent Events	SUBSEQUENT EVENTS
	On April 21, 2015, the Board of Directors of CONE Midstream GP LLC, the general partner of CONE Midstream Partners LP, declared a cash distribution to the Partnership’s unitholders for the first quarter of 2015 of $0.2125 per common and subordinated unit. The cash distribution will be paid on May 15, 2015 to unitholders of record at the close of business on May 5, 2015.

Significant_Accounting_Policie1

Significant Accounting Policies (Policies)	3 Months Ended
	Mar. 31, 2015
Accounting Policies [Abstract]
Principles of Consolidation	Principles of Consolidation:
	The consolidated financial statements include the accounts of CONE Midstream Partners LP and all of its subsidiaries. Transactions between the Partnership and its Sponsors have been identified in the consolidated financial statements as transactions between related parties and are discussed in Note 4.
Use of Estimates	Use of Estimates:
	The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets, liabilities, revenues and expenses, and various disclosures. Actual results could differ from those estimates.
Accounts Receivable	Accounts Receivable:
	Accounts receivable are recorded at the invoiced amount and do not bear interest. We reserve for specific accounts receivable when it is probable that all or a part of an outstanding balance will not be collected, such as customer bankruptcies. Collectability is determined based on terms of sale, credit status of customers and various other circumstances. We regularly review collectability and establish or adjust the allowance as necessary using the specific identification method. Account balances are charged off against the allowance after all means of collection have been exhausted and the potential for recovery is considered remote. There were no reserves for uncollectible amounts in the periods presented.
Inventory	Inventory:
	Inventory is stated at the lower of cost or market. Inventory consists of pipe purchased for a pipeline project that has been delayed.  The cost is determined primarily under the specific identification method.  The pipe will be used in an alternative project or sold to a third party.
Property and Equipment	Property and Equipment:
	Property and equipment is recorded at cost upon acquisition. Expenditures which extend the useful lives of existing property and equipment are capitalized.
	When properties are retired or otherwise disposed, the related cost and accumulated depreciation are removed from the respective accounts and any profit or loss on disposition is recognized as gain or loss. There were no retirements or disposals during the periods presented.
	The Partnership evaluates whether long-lived assets have been impaired and determines if the carrying amount of its assets may not be recoverable. For such long-lived assets, impairment exists when the carrying amount of an asset exceeds estimates of the undiscounted cash flows expected to result from the use and eventual disposition of the asset. If the carrying amount of the long-lived asset is not recoverable, based on the estimated future undiscounted cash flows, the impairment loss is measured as the excess of the asset’s carrying amount over its estimated fair value, such that the asset’s carrying amount is adjusted to its estimated fair value with an offsetting charge to operating expense.
	Fair value represents the estimated price between market participants to sell an asset in the principal or most advantageous market for the asset, based on assumptions a market participant would make. When warranted, management assesses the fair value of long-lived assets using commonly accepted techniques and may use more than one source in making such assessments. Sources used to determine fair value include, but are not limited to, recent third-party comparable sales, internally developed discounted cash flow analyses and analyses from outside advisors. Significant changes, such as the condition of an asset or management’s intent to utilize the asset generally require management to reassess the cash flows related to long-lived assets. No impairments were identified during the periods presented.
	Depreciation of property and equipment is calculated on the straight-line method over their estimated useful lives or lease terms.
Variable Interest Entities	Variable Interest Entities:
	The Anchor, Growth and Additional Limited Partnerships (the Limited Partnerships), which are variable interest entities, are consolidated by CONE Midstream Partners LP through its ownership of CONE Midstream Operating Company LLC. CONE Midstream Operating Company LLC, through its general partner ownership interest in each of the Anchor, Growth and Additional Limited Partnerships, has the power to direct all substantive strategic and day-to-day operational decisions of the Limited Partnerships. CONE Midstream Operating Company LLC is considered to be the primary beneficiary for accounting purposes.
Revenue Recognition	Revenue Recognition:
	Revenues are recognized for the transportation of natural gas and other hydrocarbons based on the delivery of actual volumes transported at a contracted throughput rate. Operating fees received are recorded in gathering revenue — related party in the period the service is performed.
Environmental Matters	Environmental Matters:
	We are subject to various federal, state and local laws and regulations relating to the protection of the environment. We have established procedures for the ongoing evaluation of our operations, to identify potential environmental exposures and to comply with regulatory policies and procedures, including legislation related to greenhouse gas emissions. Environmental expenditures that relate to current operations are expensed or capitalized as appropriate. Expenditures that relate to an existing condition caused by past operations, and do not contribute to current or future revenue generation, are expensed. Liabilities are recorded when environmental assessments and/or clean-ups are probable, and the costs can be reasonably estimated. At this time, we are unable to assess the timing and/or effect of potential liabilities related to greenhouse gas emissions or other environmental issues. As of March 31, 2015, we had no material environmental matters that required specific disclosure or requiring the recognition of a liability.
Asset Retirement Obligations	Asset Retirement Obligation:
	We perform an ongoing analysis of asset removal and site restoration costs that we may be required to perform under law or contract once an asset has been permanently taken out of service. We have property and equipment at locations that we own and at sites leased or under right of way agreements. We are under no contractual obligation to remove the assets at locations we own. In evaluating our asset retirement obligation, we review lease agreements, right of way agreements, easements and permits to determine which agreements, if any, require an asset removal and restoration obligation. Determination of the amounts to be recognized is based upon numerous estimates and assumptions, including expected settlement dates, future retirement costs, future inflation rates and the credit-adjusted-risk-free interest rates. We operate and maintain our midstream systems and intend to do so as long as supply and demand for natural gas exists, which we expect for the foreseeable future. Therefore, we believe that we cannot reasonably estimate the asset retirement obligations for our midstream system assets as these assets have indeterminate lives.
Income Taxes	Income Taxes:
	Our operations as a limited partnership, and our Predecessor, as a limited liability company, are treated as partnerships for federal and state income tax purposes, with each partner being separately taxed on its share of the taxable income. Accordingly, no provision for federal or state income taxes has been recorded.
Net Income per Limited Partners Unit	Net Income per Limited Partners Unit:
	We allocate our net income among our general partner and limited partners using the two-class method in accordance with applicable authoritative accounting guidance. Under the two-class method, we allocate our net income to our limited partners, our general partner and the holders of our IDRs in accordance with the terms of our partnership agreement. We also allocate any earnings in excess of distributions to our limited partners, our general partner and the holders of the IDRs in accordance with the terms of our partnership agreement. We allocate any distributions in excess of earnings for the period to our general partner and our limited partners based on their respective proportionate ownership interests in us, after taking into account distributions to be paid with respect to the IDRs, as set forth in our partnership agreement.
	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 subject to performance or market conditions should be included in the diluted net income per limited partner unit calculation, the impact is reflected by applying the treasury stock method. Potentially dilutive securities included in the calculation of diluted net income per limited partner unit totaled 33,697 phantom units for the three months ended March 31, 2015.
	Our partnership agreement requires that, within 45 days after the end of each quarter, the Partnership distribute all of its available cash (described below) to unitholders of record on the applicable record date.
Cash Distribution, Subordinated Units, and Incentive Distribution Rights	Cash Distributions:
	Our partnership agreement requires that we distribute all of our available cash quarterly. This requirement forms the basis of our cash distribution policy and reflects a basic judgment that our unitholders will be better served by distributing our available cash rather than retaining it because, among other reasons, we believe we will generally finance any expansion capital expenditures from external financing sources.
	Subordinated Units:
	Our partnership agreement provides that, during the subordination period, the common unitholders will have the right to receive distributions of available cash from operating surplus each quarter in an amount equal to $0.2125 per unit, which amount is defined in our partnership agreement as the minimum quarterly distribution, plus any arrearages in the payment of the minimum quarterly distribution on the common units from prior quarters, before any distributions of available cash from operating surplus may be made on the subordinated units. The practical effect of the subordinated units is to increase the likelihood that, during the subordination period, there will be available cash to be distributed on the common units. The subordination period will end, and the subordinated units will convert to common units, on a one-for-one basis, when certain distribution requirements, as defined in the partnership agreement, have been met. The earliest date at which the subordination period may end is September 30, 2015.
	Incentive Distribution Rights:
	All of the IDRs are currently held by CONE Midstream GP LLC, our general partner. Incentive distribution rights represent the right to receive an increasing percentage (13.0%, 23.0% and 48.0%) of quarterly distributions of available cash from operating surplus after the minimum quarterly distribution and the target distribution levels described below have been achieved. Our general partner may transfer the IDRs separately from its general partner interest.
Reclassifications	Reclassifications
	Certain amounts in prior periods have been reclassified to conform with the current reporting classifications with no effect on previously reported net income or partners' capital.
Recent Accounting Pronouncements	Recent Accounting Pronouncements
	In April 2015, the FASB issued ASU 2015-3 “Interest - Imputation of Interest: Simplifying the Presentation of Debt Issuance Costs” (ASU 2015-3). ASU 2015-3 simplifies the presentation of debt issuance costs by requiring such costs be presented as a deduction from the corresponding debt liability. The guidance is effective for financial statements issued for reporting periods beginning after December 15, 2015 and interim periods within the reporting periods and requires retrospective presentation. We will adopt the standard in the first quarter of 2016. The Partnership believes adoption of this new guidance will not have a material impact on CONE Midstream's financial statements.
	In May 2014, the Financial Accounting Standards Board issued Update 2014-09 - Revenue from Contracts with Customers (Topic 606). The objective of the amendments in this update is to improve financial reporting by creating common revenue recognition guidance for U.S. GAAP and International Financial Reporting Standards (IFRS). The guidance in this update supersedes the revenue recognition requirements in Topic 605, Revenue Recognition, and most industry-specific guidance throughout the Industry Topics of the Codification. The core principle of the guidance is that an entity should recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. An entity should disclose sufficient information, both qualitative and quantitative, to enable users of financial statements to understand the nature, amount, timing, and uncertainty of revenue and cash flows arising from contracts with customers. The amendments in this update are effective for annual reporting periods beginning after December 15, 2017, including interim periods within that reporting period. Early application is not permitted. We are currently evaluating the method of adoption and impact that this new guidance will have on our financial statements.

Significant_Accounting_Policie2

Significant Accounting Policies Tables (Tables)	3 Months Ended
	Mar. 31, 2015
Accounting Policies [Abstract]
Schedule of Target Distributions	The following table illustrates the percentage allocations of available cash from operating surplus between the unitholders and our general partner based on the specified target distribution levels. The amounts set forth under “Marginal Percentage Interest in Distributions” are the percentage interests of our general partner and the unitholders in any available cash from operating surplus we distribute up to and including the corresponding amount in the column “Total Quarterly Distribution Per Unit Target Amount.” The percentage interests shown for our unitholders and our general partner for the minimum quarterly distribution are also applicable to quarterly distribution amounts that are less than the minimum quarterly distribution.
	The percentage interests set forth below for our general partner include its 2% general partner interest and assume that our general partner has contributed any additional capital necessary to maintain its 2% general partner interest, our general partner has not transferred its incentive distribution rights and there are no arrearages on common units.
				Marginal Percentage Interest in
				Distributions
	Distribution Targets	Total Quarterly Distribution		Unitholders	General Partner
		Per Unit Target Amount
	Minimum Quarterly Distribution		$0.21	98%	2%
	First Target Distribution	Above $0.2125	up to $0.24438	98%	2%
	Second Target Distribution	Above $0.24438	up to $0.26563	85%	15%
	Third Target Distribution	Above $0.26563	up to $0.31875	75%	25%
	Thereafter	Above $0.31875		50%	50%

Net_Income_per_Limited_Partner1

Net Income per Limited Partner and General Partner Interest (Tables)	3 Months Ended
	Mar. 31, 2015
Earnings Per Share [Abstract]
Schedule of Net Income (Loss) Per Unit	The following table illustrates the Partnership’s calculation of net income per unit for common and subordinated partner units (in thousands, except per unit information):
		March 31,
		2015
	Net Income Attributable to General and Limited Partner Ownership Interest in CONE Midstream Partners LP	$	14,212
	Less: General Partner Interest in Net Income	284
	Limited Partner Interest in Net Income	$	13,928
	Net Income Allocable to Common Units	$	6,964
	Net Income Allocable to Subordinated Units	6,964
	Limited Partner Interest in Net Income	$	13,928
	Weighted Average Limited Partner Units Outstanding — Basic
	Common Units	29,163
	Subordinated Units	29,163
	Total	58,326
	Weighted Average Limited Partner Units Outstanding — Diluted
	Common Units	29,197
	Subordinated Units	29,163
	Total	58,360
	Net Income Per Limited Partner Unit — Basic and Diluted
	Common Units	$	0.24
	Subordinated Units	$	0.24

Concentration_of_Credit_Risk_T

Concentration of Credit Risk (Tables)	3 Months Ended
	Mar. 31, 2015
Risks and Uncertainties [Abstract]
Schedule of Revenue from Sponsors	Revenues from each Sponsor consisted of the following:
		March 31, 2015		March 31, 2014
	CONSOL	$	22,162	$	12,206
	Noble Energy	21,006		11,900
	Total Revenue	$	43,168	$	24,106

Accounts_Receivable_Related_Pa1

Accounts Receivable - Related Party (Tables)	3 Months Ended
	Mar. 31, 2015
Receivables [Abstract]
Schedule of Related Party Accounts Receivable	Receivables are comprised of related party receivables related to gathering fees and contribution activities and consisted of the following:
		31-Mar-15		31-Dec-14
	Gathering Fees:
	CONSOL	$	7,961	$	7,732
	Noble Energy	13,574		13,697
	Contributions Receivable:
	CONSOL	—		16,141
	Noble Energy	7,770		18,866
	Other:
	CONE Gathering LLC	6,250		2,313
	CONSOL	6,216		—
	Total Receivables — Related Party	$	41,771	$	58,749

Property_and_Equipment_Tables

Property and Equipment (Tables)	3 Months Ended
	Mar. 31, 2015
Property, Plant and Equipment [Abstract]
Property and Equipment
		31-Mar-15		31-Dec-14		Estimated Useful
						Lives in Years
	Land	$	57,431	$	47,701	N/A
	Gathering Equipment	383,499		298,897		25 — 40
	Compression Equipment	91,585		91,585		40
	Processing Equipment	30,979		30,979		40
	Assets Under Construction	115,410		170,573		N/A
	Total Property and Equipment	$	678,904	$	639,735
	Less: Accumulated Depreciation
	Gathering	$	11,965	$	9,848
	Compression	5,063		4,486
	Processing	2,862		2,655
	Total Accumulated Depreciation	$	19,890	$	16,989
	Property and Equipment, Net	$	659,014	$	622,746

Accounts_Payable_Related_Party1

Accounts Payable - Related Party (Tables)	3 Months Ended
	Mar. 31, 2015
Payables and Accruals [Abstract]
Schedule of Related Party Payables	Related party payables consisted of the following:
		31-Mar-15		31-Dec-14
	Accounts Payable — Related Party
	Capital Expenditure Reimbursement to CNX Gas (1)	$	165	$	561
	Expense Reimbursement to CONSOL	1,377		1,016
	General and Administrative Services Provided by CONSOL	485		432
	General and Administrative Services Provided by Noble	45		$	97
	Total Accounts Payable — Related Party	$	2,072	$	2,106
	(1) CNX Gas is a wholly owned subsidiary of CONSOL

Leases_Tables

Leases (Tables)	3 Months Ended
	Mar. 31, 2015
Leases, Operating [Abstract]
Future minimum lease payments	Future minimum lease payments under operating leases at March 31, 2015 are as follows:
		Minimum Lease Payments
	2015 - 2016	$	6,185
	2016 - 2017	4,531
	2017 - 2018	2,471
	2018 - 2019	183
		$	13,370

Segment_Information_Tables

Segment Information (Tables)	3 Months Ended
	Mar. 31, 2015
Segment Reporting [Abstract]
Schedule of Operating Revenues and Income from Operations	All of the Partnership’s operating revenues, income from operations and assets are generated or located in the United States.
		Three Months Ended
		March 31,
		2015		2014
	Gathering Revenue - Related Party:
	Anchor Systems	$	34,533	$	21,241
	Growth Systems	2,975		2,519
	Additional Systems	5,660		—
	Other (1)	—		346
	Total Gathering Revenue - Related Party	$	43,168	$	24,106
	Net Income (Loss):
	Anchor Systems	$	18,787	$	8,747
	Growth Systems	801		723
	Additional Systems	1,628		(162		)
	Other (1)	—		142
	Total Net Income	$	21,216	$	9,450
	Depreciation Expense:
	Anchor Systems	$	2,397	$	1,159
	Growth Systems	444		449
	Additional Systems	153		—
	Other (1)	—		10
	Total Depreciation Expense	$	2,994	$	1,618
	Capital Expenditures for Segment Assets:
	Anchor Systems	$	29,299	$	32,043
	Growth Systems	11,637		4,576
	Additional Systems	20,870		6,493
	Other (1)	—		4,192
	Total Capital Expenditures	$	61,806	$	47,304
	-1	Other consists of assets that are retained by our Predecessor, CONE Gathering, and are thus not part of the transactions that occurred in connection with the closing of the IPO. See Note 1 - Description of Business, Initial Public Offering and Basis of Presentation.
Reconciliation of Assets from Segment to Consolidated
		March 31,		December 31,
		2015		2014
	Segment Assets
	Anchor Systems	$	460,187	$	430,350
	Growth Systems	99,321		119,550
	Additional Systems	160,173		136,904
	Total Segment Assets	$	719,681	$	686,804

Revolving_Credit_Facility_Tabl

Revolving Credit Facility (Tables)	3 Months Ended
	Mar. 31, 2015
Debt Disclosure [Abstract]
Schedule of Line of Credit Facilities	The outstanding balance of our revolving credit facility and interest rates on the amounts drawn from our revolver consist of the following:
		31-Mar-15				31-Dec-14
	(thousands, except percentages)	Debt		Interest Rate		Debt		Interest Rate
	Credit Facility, Due September 30, 2019	$	7,500	3.75	%	$	31,300	3.75	%

Description_of_Business_Initia1

Description of Business, Initial Public Offering and Basis of Presentation (Details) (USD $)	3 Months Ended		0 Months Ended
In Thousands, except Share data, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014	Sep. 30, 2014
Schedule of Equity Method Investments [Line Items]
General partner's ownership interest	2.00%
Net proceeds distributed to CONE Gathering from the IPO	$12,784	$0
Anchor Systems
Schedule of Equity Method Investments [Line Items]
Noncontrolling Interest, Ownership Percentage by Parent			75.00%
Growth Systems
Schedule of Equity Method Investments [Line Items]
Noncontrolling Interest, Ownership Percentage by Parent			5.00%
Additional Systems
Schedule of Equity Method Investments [Line Items]
Noncontrolling Interest, Ownership Percentage by Parent			5.00%
Common Units
Schedule of Equity Method Investments [Line Items]
Units sold in public offering			20,125,000
Price per share sold in IPO			$22
Common Units | Over-Allotment Option
Schedule of Equity Method Investments [Line Items]
Units sold in public offering			2,625,000
CONE Gathering
Schedule of Equity Method Investments [Line Items]
General partner's ownership interest			2.00%
Percentage Interest Received by Company			64.20%
Net proceeds distributed to CONE Gathering from the IPO			$407,971
CONE Gathering | Common Units
Schedule of Equity Method Investments [Line Items]
Limited Partner units distributed to CONE Gathering from the IPO			9,038,121
CONE Gathering | Subordinated Units
Schedule of Equity Method Investments [Line Items]
Limited Partner units distributed to CONE Gathering from the IPO			29,163,121

Significant_Accounting_Policie3

Significant Accounting Policies (Details) (USD $)	3 Months Ended
In Thousands, except Share data, unless otherwise specified	Mar. 31, 2015
Schedule of Target Distributions [Line Items]
Emerging Growth Company, Maximum Status Period	5 years
Emerging Growth Company, Termination of Status, Maximum Revenue	$1,000,000
Emerging Growth Company, Termination of Status, Maximum Market Value of Limited Partner Interest Held by Non-Affiliates	700,000
Emerging Growth Company, Termination of Status, Maximum Non-Convertible Debt Issuable	$1,000,000
Emerging Growth Company, Termination of Status, Maximum Non-Convertible Debt Issuable, Period	3 years
Number of potential diluted securities included in the calculation of diluted net income per limited partner unit (in units)	33,697
Period to distribute available cash	45 days
Quarterly distribution to limited partner	$0.21
Annual distribution to limited partner	$0.85
General partner's ownership interest	2.00%
Incentive Distribution, Distribution Rate One	13.00%
Incentive Distribution, Distribution Rate Two	23.00%
Incentive Distribution, Distribution Rate Three	48.00%
First Target Distribution
Schedule of Target Distributions [Line Items]
Marginal Percentage Interest in Distributions- Unitholders	98.00%
Marginal Percentage Interest in Distributions- General Partner	2.00%
Second Target Distribution
Schedule of Target Distributions [Line Items]
Marginal Percentage Interest in Distributions- Unitholders	85.00%
Marginal Percentage Interest in Distributions- General Partner	15.00%
Third Target Distribution
Schedule of Target Distributions [Line Items]
Marginal Percentage Interest in Distributions- Unitholders	75.00%
Marginal Percentage Interest in Distributions- General Partner	25.00%
Thereafter Distributions
Schedule of Target Distributions [Line Items]
Marginal Percentage Interest in Distributions- Unitholders	50.00%
Marginal Percentage Interest in Distributions- General Partner	50.00%
Maximum | First Target Distribution
Schedule of Target Distributions [Line Items]
Quarterly distribution to limited partner	$0.24
Maximum | Second Target Distribution
Schedule of Target Distributions [Line Items]
Quarterly distribution to limited partner	$0.27
Maximum | Third Target Distribution
Schedule of Target Distributions [Line Items]
Quarterly distribution to limited partner	$0.32

Significant_Accounting_Policie4

Significant Accounting Policies - Schedule of Target Distributions (Details) (USD $)	3 Months Ended
	Mar. 31, 2015
Schedule of Target Distributions [Line Items]
Quarterly distribution to limited partner	$0.21
Minimum Quarterly Distribution
Schedule of Target Distributions [Line Items]
Marginal Percentage Interest in Distributions- Unitholders	98.00%
Marginal Percentage Interest in Distributions- General Partner	2.00%
First Target Distribution
Schedule of Target Distributions [Line Items]
Marginal Percentage Interest in Distributions- Unitholders	98.00%
Marginal Percentage Interest in Distributions- General Partner	2.00%
Second Target Distribution
Schedule of Target Distributions [Line Items]
Marginal Percentage Interest in Distributions- Unitholders	85.00%
Marginal Percentage Interest in Distributions- General Partner	15.00%
Third Target Distribution
Schedule of Target Distributions [Line Items]
Marginal Percentage Interest in Distributions- Unitholders	75.00%
Marginal Percentage Interest in Distributions- General Partner	25.00%
Thereafter Distributions
Schedule of Target Distributions [Line Items]
Marginal Percentage Interest in Distributions- Unitholders	50.00%
Marginal Percentage Interest in Distributions- General Partner	50.00%
Minimum | First Target Distribution
Schedule of Target Distributions [Line Items]
Quarterly distribution to limited partner	$0.21
Minimum | Second Target Distribution
Schedule of Target Distributions [Line Items]
Quarterly distribution to limited partner	$0.24
Minimum | Third Target Distribution
Schedule of Target Distributions [Line Items]
Quarterly distribution to limited partner	$0.27
Minimum | Thereafter Distributions
Schedule of Target Distributions [Line Items]
Quarterly distribution to limited partner	$0.32
Maximum | First Target Distribution
Schedule of Target Distributions [Line Items]
Quarterly distribution to limited partner	$0.24
Maximum | Second Target Distribution
Schedule of Target Distributions [Line Items]
Quarterly distribution to limited partner	$0.27
Maximum | Third Target Distribution
Schedule of Target Distributions [Line Items]
Quarterly distribution to limited partner	$0.32

Net_Income_per_Limited_Partner2

Net Income per Limited Partner and General Partner Interest (Details) (USD $)	3 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Mar. 31, 2015		Mar. 31, 2014
Limited Partners' Capital Account [Line Items]
Net Income Attributable to General and Limited Partner Ownership Interest in CONE Midstream Partners LP	$14,212	[1]	$9,450
Less: General Partner Interest in Net Income	284
Net Income (Loss) Allocated to Limited Partners	13,928
Weighted Average Limited Partner Units Outstanding — Basic	58,326
Weighted Average Limited Partner Units Outstanding — Diluted	58,360
Common Units
Limited Partners' Capital Account [Line Items]
Net Income (Loss) Allocated to Limited Partners	6,964
Weighted Average Limited Partner Units Outstanding — Basic	29,163
Weighted Average Limited Partner Units Outstanding — Diluted	29,197
Net Income Per Limited Partner Unit — Basic and Diluted	$0.24
Subordinated Units
Limited Partners' Capital Account [Line Items]
Net Income (Loss) Allocated to Limited Partners	$6,964
Weighted Average Limited Partner Units Outstanding — Basic	29,163
Weighted Average Limited Partner Units Outstanding — Diluted	29,163
Net Income Per Limited Partner Unit — Basic and Diluted	$0.24
[1]	Reflective of general and limited partner interest in net income since closing of the IPO. See Note 1 - Description of Business, Initial Public Offering and Basis of Presentation

Related_Party_Details

Related Party (Details) (Affiliated Entity, USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Shared Service Agreement with CONSOL
Related Party Transaction [Line Items]
Charges for services	$7,044	$6,630
General and administrative expenses	1,836	241
Purchases of Inventory from CONSOL
Related Party Transaction [Line Items]
Purchases of supply inventory		1,435
CONSOL Energy | Administrative Services
Related Party Transaction [Line Items]
General and administrative expenses	600
CONSOL Energy | Executive Administrative Services
Related Party Transaction [Line Items]
General and administrative expenses	600
CONSOL Energy | Operational Service Agreement
Related Party Transaction [Line Items]
Term of Agreement (in years)	20 years
Termination period to either party	6 months
Termination period	180 days
Maximum period to cure default	45 days
Noble Energy
Related Party Transaction [Line Items]
General and administrative expenses	141
Noble Energy | Executive Administrative Services
Related Party Transaction [Line Items]
General and administrative expenses	$200
Noble Energy | NBL Gas Gathering Agreement
Related Party Transaction [Line Items]
Term of Agreement (in years)	20 years
Maxium period for uncured default	90 days
Downstream fees receivable (in dollars per MMBtu)	0.4
Fees receivable, excluding downstream (in dollars per MMBtu)	0.55
CNX Gas | CNX Gas Gathering Agreement
Related Party Transaction [Line Items]
Term of Agreement (in years)	20 years
Maxium period for uncured default	90 days
Downstream fees receivable (in dollars per MMBtu)	0.4
Fees receivable, excluding downstream (in dollars per MMBtu)	0.55
West Virgina | Noble Energy | NBL Gas Gathering Agreement
Related Party Transaction [Line Items]
Fees receivable, excluding downstream (in dollars per MMBtu)	0.275
Condensate fees receivable (in dollars per Bbl)	2.5
West Virgina | CNX Gas | CNX Gas Gathering Agreement
Related Party Transaction [Line Items]
Fees receivable, excluding downstream (in dollars per MMBtu)	0.275
Condensate fees receivable (in dollars per Bbl)	2.5
Pennsylvania | Noble Energy | NBL Gas Gathering Agreement
Related Party Transaction [Line Items]
Fees receivable, excluding downstream (in dollars per MMBtu)	0.275
Condensate fees receivable (in dollars per Bbl)	5
Pennsylvania | CNX Gas | CNX Gas Gathering Agreement
Related Party Transaction [Line Items]
Fees receivable, excluding downstream (in dollars per MMBtu)	0.275
Condensate fees receivable (in dollars per Bbl)	5

Concentration_of_Credit_Risk_D

Concentration of Credit Risk (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Concentration Risk [Line Items]
Revenue, Net	$43,168	$24,106
CONSOL Energy
Concentration Risk [Line Items]
Revenue, Net	22,162	12,206
Noble Energy
Concentration Risk [Line Items]
Revenue, Net	$21,006	$11,900
Revenue | CONSOL and Noble | Customer Concentration Risk
Concentration Risk [Line Items]
Percentage of Predecessor's revenue	100.00%	100.00%

Accounts_Receivable_Related_Pa2

Accounts Receivable - Related Party (Details) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified
Accounts, Notes, Loans and Financing Receivable [Line Items]
Receivables — Related Party	$41,771	$58,749
Gathering Fees | CONSOL Energy | Affiliated Entity
Accounts, Notes, Loans and Financing Receivable [Line Items]
Receivables — Related Party	7,961	7,732
Gathering Fees | Noble Energy | Affiliated Entity
Accounts, Notes, Loans and Financing Receivable [Line Items]
Receivables — Related Party	13,574	13,697
Contribution Receivable | CONSOL Energy | Affiliated Entity
Accounts, Notes, Loans and Financing Receivable [Line Items]
Receivables — Related Party	0	16,141
Contribution Receivable | Noble Energy | Affiliated Entity
Accounts, Notes, Loans and Financing Receivable [Line Items]
Receivables — Related Party	7,770	18,866
Other | CONSOL Energy | Affiliated Entity
Accounts, Notes, Loans and Financing Receivable [Line Items]
Receivables — Related Party	6,216	0
Other | CONE Gathering LLC | Affiliated Entity
Accounts, Notes, Loans and Financing Receivable [Line Items]
Receivables — Related Party	$6,250	$2,313

Property_and_Equipment_Details

Property and Equipment (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Property, Plant and Equipment [Line Items]
Property and Equipment	$678,904	$639,735
Less — Accumulated Depreciation	19,890	16,989
Property and Equipment — Net	659,014	622,746
Land
Property, Plant and Equipment [Line Items]
Property and Equipment	57,431	47,701
Gathering Equipment
Property, Plant and Equipment [Line Items]
Property and Equipment	383,499	298,897
Less — Accumulated Depreciation	11,965	9,848
Gathering Equipment | Minimum
Property, Plant and Equipment [Line Items]
Estimated Useful Lives in Years	25 years
Gathering Equipment | Maximum
Property, Plant and Equipment [Line Items]
Estimated Useful Lives in Years	40 years
Compression Equipment
Property, Plant and Equipment [Line Items]
Property and Equipment	91,585	91,585
Less — Accumulated Depreciation	5,063	4,486
Estimated Useful Lives in Years	40 years
Processing Equipment
Property, Plant and Equipment [Line Items]
Property and Equipment	30,979	30,979
Less — Accumulated Depreciation	2,862	2,655
Estimated Useful Lives in Years	40 years
Asset Under Construction
Property, Plant and Equipment [Line Items]
Property and Equipment	$115,410	$170,573

Accounts_Payable_Related_Party2

Accounts Payable - Related Party (Details) (USD $)	Mar. 31, 2015		Dec. 31, 2014
In Thousands, unless otherwise specified
Related Party Transaction [Line Items]
Accounts Payable — Related Party	$2,072		$2,106
Capital Expenditure Reimbursement to CNX Gas
Related Party Transaction [Line Items]
Accounts Payable — Related Party	165	[1]	561
Expense Reimbursement to CONSOL
Related Party Transaction [Line Items]
Accounts Payable — Related Party	1,377		1,016	[1]
Services Provided by CONSOL
Related Party Transaction [Line Items]
Accounts Payable — Related Party	485		432
Services Provided by Noble Energy [Member]
Related Party Transaction [Line Items]
Accounts Payable — Related Party	$45		$97
[1]	CNX Gas is a wholly owned subsidiary of CONSOL

Supplemental_Cash_Flow_Informa1

Supplemental Cash Flow Information (Details) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified
Related Party Transaction [Line Items]
Due from Related Parties, Current	$41,771	$58,749
Contribution Receivable | Noble Energy | Affiliated Entity
Related Party Transaction [Line Items]
Due from Related Parties, Current	7,770	18,866
Contribution Receivable | CONSOL Energy | Affiliated Entity
Related Party Transaction [Line Items]
Due from Related Parties, Current	0	16,141
Capital Expenditures [Member] | CONE Gathering LLC | Affiliated Entity
Related Party Transaction [Line Items]
Due from Related Parties, Current	4,746
Inventories [Member] | CONSOL Energy | Affiliated Entity
Related Party Transaction [Line Items]
Due from Related Parties, Current	2,240
Capital Project Reimbursements [Member] | CONSOL Energy | Affiliated Entity
Related Party Transaction [Line Items]
Due from Related Parties, Current	$3,976

Leases_Details

Leases (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Leases, Operating [Abstract]
2015 - 2016	$6,185
2016 - 2017	4,531
2017 - 2018	2,471
2018 - 2019	183
Total future minimum lease payments	13,370
Rental expense	$2,072	$1,015

Segment_Information_Details

Segment Information (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015		Mar. 31, 2014		Dec. 31, 2014
	segment
Segment Reporting Information [Line Items]
Number of operating segments	3
Gathering Revenue - Related Party:	$43,168		$24,106
Net Income (Loss):	21,216		9,450
Depreciation Expense	2,994		1,618
Capital Expenditures for Segment Assets:	61,806		47,304
Total Segment Assets	719,681				686,804
Anchor Systems
Segment Reporting Information [Line Items]
Gathering Revenue - Related Party:	34,533		21,241
Net Income (Loss):	18,787		8,747
Depreciation Expense	2,397		1,159
Capital Expenditures for Segment Assets:	29,299		32,043
Total Segment Assets	460,187				430,350
Growth Systems
Segment Reporting Information [Line Items]
Gathering Revenue - Related Party:	2,975		2,519
Net Income (Loss):	801		723
Depreciation Expense	444		449
Capital Expenditures for Segment Assets:	11,637		4,576
Total Segment Assets	99,321				119,550
Additional Systems
Segment Reporting Information [Line Items]
Gathering Revenue - Related Party:	5,660		0
Net Income (Loss):	1,628		-162
Depreciation Expense	153		0
Capital Expenditures for Segment Assets:	20,870		6,493
Total Segment Assets	160,173				136,904
Other
Segment Reporting Information [Line Items]
Gathering Revenue - Related Party:	0	[1]	346	[1]
Net Income (Loss):	0	[1]	142	[1]
Depreciation Expense	0	[1]	10	[1]
Capital Expenditures for Segment Assets:	$0	[1]	$4,192	[1]
[1]	Other consists of assets that are retained by our Predecessor, CONE Gathering, and are thus not part of the transactions that occurred in connection with the closing of the IPO. See Note 1 - Description of Business, Initial Public Offering and Basis of Presentation.

Schedule_of_Revolving_Credit_F

Schedule of Revolving Credit Facilities (Details) (Revolving Credit Facility, USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified
Revolving Credit Facility
Line of Credit Facility [Line Items]
Line of credit, outstanding amount	$7,500	$31,300
Line of Credit Facility, Interest Rate at Period End	3.75%	3.75%

Revolving_Credit_Facility_Deta

Revolving Credit Facility (Details) (Revolving Credit Facility, USD $)	0 Months Ended	3 Months Ended	12 Months Ended
	Sep. 30, 2014	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014
Debt Instrument [Line Items]
Unamortized Debt Issuance Expense		$700,000
Interest expense		41,000	41,000
Revolving credit facility	250,000,000			250,000,000
Debt Instrument, Term	5 years
Debt Covenant, funded debt to EBITDA ratio, non-acquisition period		5
Debt Covenant, funded debt to EBITDA ratio, acquisition period		5.5
Interest expense ratio		3
Line of credit, outstanding amount		$7,500,000	$31,300,000
Federal Funds Rate
Debt Instrument [Line Items]
Federal funds rate		0.50%
Base Rate, London Interbank Offered Rate (LIBOR)
Debt Instrument [Line Items]
Federal funds rate		1.00%
Minimum
Debt Instrument [Line Items]
Commitment fee percentage		0.15%
Minimum | LIBOR plus 1%
Debt Instrument [Line Items]
Federal funds rate		0.13%
Minimum | LIBOR
Debt Instrument [Line Items]
Federal funds rate		1.13%
Maximum
Debt Instrument [Line Items]
Commitment fee percentage		0.35%
Maximum | LIBOR plus 1%
Debt Instrument [Line Items]
Federal funds rate		1.00%
Maximum | LIBOR
Debt Instrument [Line Items]
Federal funds rate		2.00%

LongTerm_Incentive_Plan_Detail

Long-Term Incentive Plan (Details) (Common Units, 2014 LTIP, USD $)	3 Months Ended
In Thousands, except Share data, unless otherwise specified	Mar. 31, 2015
Stock Compensation Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of common units authorized	5,800,000
Number of units issued	33,697
Common unit price on the grant date	$19.98
Phantom Share Units (PSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unit Based Compensation	$96

Subsequent_Events_Details

Subsequent Events (Details) (USD $)	3 Months Ended		0 Months Ended
	Mar. 31, 2015		Apr. 21, 2015
Subsequent Event [Line Items]
Distribution Made to Limited Partner, Distributions Declared, Per Unit	$0.21	[1]
Subsequent Event [Member]
Subsequent Event [Line Items]
Distribution Made to Limited Partner, Distributions Declared, Per Unit			$0.21
[1]	Represents the cash distributions declared related to the period presented. See Note 15.