10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-Q

(Mark One)

☑︎ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15 (d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the Quarterly Period Ended September 30, 2016

OR

☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15 (d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the transition period _______________ to _______________

Commission File Number: 001-37362

Black Stone Minerals, L.P.

(Exact name of registrant as specified in its charter)

Delaware	47-1846692
(State or other jurisdiction of incorporation or organization)	(I.R.S. Employer Identification No.)
1001 Fannin Street, Suite 2020 Houston, Texas	77002
(Address of principal executive offices)	(Zip code)

(713) 445-3200

(Registrant’s telephone number, including area code)

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports) and (2) has been subject to such filing requirements for the past 90 days.    Yes  ☑ฎ    No ☐  

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files).    Yes   ☑ฎ No  

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, or a smaller reporting company. See the definitions of “large accelerated filer,” “accelerated filer” and “smaller reporting company” in Rule 12b-2 of the Exchange Act. (Check one):

Large accelerated filer	☐		Accelerated filer	☐
Non-accelerated filer	☑	(Do not check if a smaller reporting company)	Smaller reporting company	☐

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Act).    Yes  ☐    No  ☑︎

As of November 3, 2016, there were 95,736,113 common limited partner units, 95,189,076 subordinated limited partner units, and 52,691 preferred units of the registrant outstanding

TABLE OF CONTENTS

		Page
PART I – FINANCIAL INFORMATION
Item 1.	Financial Statements (Unaudited)
	Consolidated Balance Sheets as of September 30, 2016 and December 31, 2015	1
	Consolidated Statements of Operations for the Three and Nine Months Ended September 30, 2016 and 2015	2
	Consolidated Statement of Equity for the Nine Months Ended September 30, 2016	3
	Consolidated Statements of Cash Flows for the Nine Months Ended September 30, 2016 and 2015	4
	Notes to Consolidated Financial Statements	5
Item 2.	Management’s Discussion and Analysis of Financial Condition and Results of Operations	17
Item 3.	Quantitative and Qualitative Disclosures About Market Risk	32
Item 4.	Controls and Procedures	32
PART II – OTHER INFORMATION
Item 1.	Legal Proceedings	33
Item 1A.	Risk Factors	33
Item 2.	Unregistered Sales of Equity Securities and Use of Proceeds	33
Item 6.	Exhibits	33
	Signatures	34

ii

PART I – FINANCIAL INFORMATION

Item 1. Financial Statements

BLACK STONE MINERALS, L.P. AND SUBSIDIARIES

CONSOLIDATED BALANCE SHEETS

(Unaudited)

(In thousands)

	September 30, 2016			December 31, 2015
ASSETS
CURRENT ASSETS:
Cash and cash equivalents	$	4,848		$	13,233
Accounts receivable	64,391			41,246
Commodity derivative assets	13,285			48,260
Prepaid expenses and other current assets	1,718			856
TOTAL CURRENT ASSETS	84,242			103,595
PROPERTY AND EQUIPMENT
Oil and natural gas properties, at cost, using the successful efforts method of accounting, includes unproved properties of $620,502 and $524,563 at September 30, 2016 and December 31, 2015, respectively	2,680,570			2,482,211
Accumulated depreciation, depletion, amortization, and impairment	(1,630,119		)	(1,543,796		)
Oil and natural gas properties, net	1,050,451			938,415
Other property and equipment, net of accumulated depreciation of $14,706 and $14,660 at September 30, 2016 and December 31, 2015, respectively	137			179
NET PROPERTY AND EQUIPMENT	1,050,588			938,594
Deferred charges and other long-term assets	2,402			19,247
TOTAL ASSETS	$	1,137,232		$	1,061,436
LIABILITIES, MEZZANINE EQUITY AND EQUITY
CURRENT LIABILITIES:
Accounts payable	$	4,833		$	5,036
Accrued liabilities	39,394			58,003
Commodity derivative liabilities	137			—
TOTAL CURRENT LIABILITIES	44,364			63,039
LONG-TERM LIABILITIES:
Credit facility	299,000			66,000
Accrued incentive compensation	6,300			7,902
Commodity derivative liabilities	152			—
Deferred revenue	3,082			3,257
Asset retirement obligations	11,366			10,585
TOTAL LIABILITIES	364,264			150,783
COMMITMENTS AND CONTINGENCIES (Note 8)
MEZZANINE EQUITY:
Partners' equity - convertible redeemable preferred units, 53 and 77 units outstanding at September 30, 2016 and December 31, 2015, respectively	54,015			79,162
EQUITY:
Partners' equity - general partner interest	—			—
Partners' equity - common units, 95,733 and 96,162 units outstanding at September 30, 2016 and December 31, 2015, respectively	510,913			574,648
Partners' equity - subordinated units, 95,189 and 95,057 units outstanding at September 30, 2016 and December 31, 2015, respectively	206,994			255,699
Noncontrolling interests	1,046			1,144
TOTAL EQUITY	718,953			831,491
TOTAL LIABILITIES, MEZZANINE EQUITY AND EQUITY	$	1,137,232		$	1,061,436

The accompanying notes are an integral part of these consolidated financial statements.

1

BLACK STONE MINERALS, L.P. AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF OPERATIONS

(Unaudited)

(In thousands, except per unit amounts)

	Three Months Ended September 30,						Nine Months Ended September 30,
	2016			2015			2016			2015
REVENUE:
Oil and condensate sales	$	42,780		$	44,128		$	104,581		$	126,584
Natural gas and natural gas liquids sales	38,986			32,191			85,706			92,799
Gain (loss) on commodity derivative instruments	7,813			56,430			(12,295		)	57,450
Lease bonus and other income	9,592			4,271			26,129			16,051
TOTAL REVENUE	99,171			137,020			204,121			292,884
OPERATING (INCOME) EXPENSE:
Lease operating expense	5,007			4,924			14,179			16,540
Production costs and ad valorem taxes	9,228			8,175			23,301			26,250
Exploration expense	6			1,817			643			2,014
Depreciation, depletion, and amortization	28,731			23,288			79,654			83,414
Impairment of oil and natural gas properties	—			24,854			6,775			156,683
General and administrative	16,677			18,994			52,213			53,530
Accretion of asset retirement obligations	206			265			680			805
(Gain) loss on sale of assets, net	—			4			(4,772		)	(20		)
TOTAL OPERATING EXPENSE	59,855			82,321			172,673			339,216
INCOME (LOSS) FROM OPERATIONS	39,316			54,699			31,448			(46,332		)
OTHER INCOME (EXPENSE)
Interest and investment income	460			18			651			46
Interest expense	(2,282		)	(870		)	(4,773		)	(5,530		)
Other income	41			45			148			241
TOTAL OTHER EXPENSE	(1,781		)	(807		)	(3,974		)	(5,243		)
NET INCOME (LOSS)	37,535			53,892			27,474			(51,575		)
NET (INCOME) LOSS ATTRIBUTABLE TO PREDECESSOR	—			—			—			(450		)
NET (INCOME) LOSS ATTRIBUTABLE TO NONCONTROLLING INTERESTS SUBSEQUENT TO INITIAL PUBLIC OFFERING	8			(3		)	15			137
DISTRIBUTIONS ON REDEEMABLE PREFERRED UNITS SUBSEQUENT TO INITIAL PUBLIC OFFERING	(1,324		)	(2,973		)	(4,439		)	(4,783		)
NET INCOME (LOSS) ATTRIBUTABLE TO THE GENERAL PARTNER AND COMMON AND SUBORDINATED UNITS SUBSEQUENT TO INITIAL PUBLIC OFFERING	$	36,219		$	50,916		$	23,050		$	(56,671	)
ALLOCATION OF NET INCOME (LOSS) SUBSEQUENT TO INITIAL PUBLIC OFFERING ATTRIBUTABLE TO:
General partner interest	$	—		$	—		$	—		$	—
Common units	23,114			25,608			24,343			(28,502		)
Subordinated units	13,105			25,308			(1,293		)	(28,169		)
	$	36,219		$	50,916		$	23,050		$	(56,671	)
NET INCOME (LOSS) ATTRIBUTABLE TO LIMITED PARTNERS PER COMMON AND SUBORDINATED UNIT:
Per common unit (basic)	$	0.24		$	0.27		$	0.26		$	(0.30	)
Weighted average common units outstanding (basic)	95,740			96,186			95,086			96,183
Per subordinated unit (basic)	$	0.14		$	0.27		$	(0.01	)	$	(0.30	)
Weighted average subordinated units outstanding (basic)	95,189			95,057			95,125			95,057
Per common unit (diluted)	$	0.24		$	0.27		$	0.26		$	(0.30	)
Weighted average common units outstanding (diluted)	96,011			96,186			95,619			96,183
Per subordinated unit (diluted)	$	0.14		$	0.27		$	(0.01	)	$	(0.30	)
Weighted average subordinated units outstanding (diluted)	95,189			95,057			95,467			95,057
DISTRIBUTIONS DECLARED AND PAID SUBSEQUENT TO INITIAL PUBLIC OFFERING:
Per common unit	$	0.2875		$	0.1615		$	0.8125		$	0.1615
Per subordinated unit	$	0.1838		$	0.1615		$	0.5513		$	0.1615

The accompanying notes are an integral part of these consolidated financial statements.

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BLACK STONE MINERALS, L.P. AND SUBSIDIARIES

CONSOLIDATED STATEMENT OF EQUITY

(Unaudited)

(In thousands, except per unit amounts)

	Common units		Subordinated units		Partners' equity— common units			Partners' equity— subordinated units			Noncontrolling interests			Total equity
BALANCE AT DECEMBER 31, 2015	96,162		95,057		$	574,648		$	255,699		$	1,144		$	831,491
Restricted units granted, net of forfeitures	702		(109	)	—			—			—			—
Equity-based compensation	—		—		12,703			1,784			—			14,487
Conversion of redeemable preferred units	184		241		2,625			3,439			—			6,064
Repurchases of common units	(1,315	)	—		(24,696		)	—			—			(24,696		)
Distributions	—		—		(78,248		)	(52,635		)	(83		)	(130,966		)
Charges to partners' equity for accrued distribution equivalent rights	—		—		(462		)	—			—			(462		)
Net income (loss)	—		—		26,562			927			(15		)	27,474
Distributions on redeemable preferred units	—		—		(2,219		)	(2,220		)	—			(4,439		)
BALANCE AT SEPTEMBER 30, 2016	95,733		95,189		$	510,913		$	206,994		$	1,046		$	718,953

The accompanying notes are an integral part of these consolidated financial statements.

3

BLACK STONE MINERALS, L.P. AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF CASH FLOWS

(Unaudited)

(In thousands)

	Nine Months Ended September 30,
	2016			2015
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income (loss)	$	27,474		$	(51,575	)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation, depletion, and amortization	79,654			83,414
Impairment of oil and natural gas properties	6,775			156,683
Accretion of asset retirement obligations	680			805
Amortization of deferred charges	594			724
(Gain) loss on commodity derivative instruments	12,295			(57,450		)
Net cash received on settlement of commodity derivative instruments	39,220			46,532
Equity-based compensation	33,120			13,052
Gain on sale of assets, net	(4,772		)	(20		)
Changes in operating assets and liabilities:
Accounts receivable	(23,144		)	22,485
Prepaid expenses and other current assets	(862		)	(453		)
Accounts payable and accrued liabilities	(29,063		)	3,674
Deferred revenue	(175		)	(584		)
Settlement of asset retirement obligations	(237		)	(122		)
NET CASH PROVIDED BY OPERATING ACTIVITIES	141,559			217,165
CASH FLOWS FROM INVESTING ACTIVITIES:
Additions to oil and natural gas properties	(63,039		)	(42,401		)
Purchase of other property and equipment	(5		)	(96		)
Proceeds from the sale of oil and natural gas properties	177			432
Acquisitions of oil and natural gas properties	(140,893		)	(62,157		)
NET CASH USED IN INVESTING ACTIVITIES	(203,760		)	(104,222		)
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from issuance of common units of Black Stone Minerals, L.P., net of offering costs	—			399,087
Payments for capitalized offering costs	—			—
Borrowings under senior line of credit	304,500			172,600
Repayments of borrowings under senior line of credit	(71,500		)	(523,600		)
Distributions to Predecessor unitholders	—			(126,383		)
Distributions to Black Stone Minerals, L.P. common and subordinated unitholders	(130,883		)	(30,886		)
Distributions to preferred unitholders	(5,061		)	(9,812		)
Distributions to noncontrolling interests	(83		)	(167		)
Redemptions of redeemable preferred units	(18,461		)	—
Repurchases of common and subordinated units	(24,696		)	(3,015		)
NET CASH PROVIDED BY (USED IN) FINANCING ACTIVITIES	53,816			(122,176		)
NET CHANGE IN CASH AND CASH EQUIVALENTS	(8,385		)	(9,233		)
CASH AND CASH EQUIVALENTS - beginning of the period	13,233			14,803
CASH AND CASH EQUIVALENTS - end of the period	$	4,848		$	5,570
SUPPLEMENTAL DISCLOSURE
Interest paid	$	4,060		$	4,794

The accompanying notes are an integral part of these consolidated financial statements.

4

BLACK STONE MINERALS, L.P. AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

NOTE 1—BUSINESS AND BASIS OF PRESENTATION

Description of the business: Black Stone Minerals, L.P. (“BSM” or the “Partnership”) is a publicly traded Delaware limited partnership formed on September 16, 2014. On May 6, 2015, BSM completed its initial public offering (the “IPO”) of 22,500,000 common units representing limited partner interests at a price to the public of $19.00 per common unit. BSM received proceeds of $391.5 million from the sale of its common units, net of underwriting discount, structuring fee, and offering expenses (including costs previously incurred and capitalized). BSM used the net proceeds from the IPO to repay substantially all indebtedness outstanding under its credit facility. On May 1, 2015, BSM’s common units began trading on the New York Stock Exchange under the symbol “BSM.”

Black Stone Minerals Company, L.P., a Delaware limited partnership, and its subsidiaries (collectively referred to as “BSMC” or the “Predecessor”) own oil and natural gas mineral interests in the United States. In connection with the IPO, BSMC was merged into a wholly owned subsidiary of BSM, with BSMC as the surviving entity. Pursuant to the merger, the Class A and Class B common units representing limited partner interests of the Predecessor were converted into an aggregate of 72,574,715 common units and 95,057,312 subordinated units of BSM at a conversion ratio of 12.9465:1 for 0.4329 common units and 0.5671 subordinated units, and the preferred units of BSMC were converted into an aggregate of 117,963 preferred units of BSM at a conversion ratio of one to one. The merger was accounted for as a combination of entities under common control with assets and liabilities transferred at their carrying amounts in a manner similar to a pooling of interests. Unless otherwise stated or the context otherwise indicates, all references to the “Partnership” or similar expressions for time periods prior to the IPO refer to Black Stone Minerals Company, L.P. and its subsidiaries, the Predecessor, for accounting purposes. For time periods subsequent to the IPO, these terms refer to Black Stone Minerals, L.P. and its subsidiaries.

In addition to mineral interests, which make up the vast majority of the asset base, the Partnership’s assets also include nonparticipating and overriding royalty interests. These interests, which are substantially non-cost-bearing, are collectively referred to as “mineral and royalty interests.” As of September 30, 2016, the Partnership’s mineral and royalty interests were located in most of the major onshore oil and natural gas producing basins spread across 41 states and 61 onshore oil and natural gas producing basins of the continental United States. The Partnership also owns non-operated working interests in certain oil and natural gas properties.

Basis of presentation: The accompanying unaudited interim consolidated financial statements of the Partnership have been prepared in accordance with generally accepted accounting principles (“GAAP”) in the United States and pursuant to the rules and regulations of the U.S. Securities and Exchange Commission (“SEC”). These unaudited interim consolidated financial statements have been prepared in accordance with the instructions to Form 10-Q and, therefore, do not include all disclosures required for financial statements prepared in conformity with U.S. GAAP. Accordingly, the accompanying unaudited interim consolidated financial statements and related notes should be read in conjunction with the Partnership’s consolidated financial statements for the years ended December 31, 2015, 2014, and 2013 included in the Partnership’s 2015 Annual Report on Form 10-K. The financial statements include the consolidated results of the Partnership. All intercompany balances and transactions have been eliminated.

Certain reclassifications have been made to the prior periods presented to conform to the current period financial statement presentation. The reclassifications have no effect on the consolidated financial position, results of operations, or cash flows of the Partnership. In the opinion of management, all material adjustments, which are of a normal and recurring nature, necessary for a fair presentation of the results for the periods presented have been reflected. The results of operations for the three months and nine months ended September 30, 2016 are not necessarily indicative of the results to be expected for the full year.

The Partnership evaluates the significant terms of its investments to determine the method of accounting to be applied to each respective investment. Investments in which the Partnership has less than a 20% ownership interest and does not have control or exercise significant influence are accounted for under the cost method. The Partnership’s cost method investment is included in deferred charges and other long-term assets in the consolidated balance sheets. Investments in which the Partnership exercises control are consolidated, and the noncontrolling interests of such investments, which are not attributable directly or indirectly to the Partnership, are presented as a separate component of net income and equity in the accompanying consolidated financial statements.

The consolidated financial statements include undivided interests in oil and natural gas property rights. The Partnership accounts for its share of oil and natural gas property rights by reporting its proportionate share of assets, liabilities, revenues, costs, and cash flows within the relevant lines on the accompanying consolidated balance sheets, statements of operations, and statements of cash flows.

5

BLACK STONE MINERALS, L.P. AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

Segment reporting: The Partnership operates in a single operating and reportable segment. Operating segments are defined as components of an enterprise for which separate financial information is evaluated regularly by the chief operating decision maker in deciding how to allocate resources and assess performance. The Partnership’s chief executive officer has been determined to be the chief operating decision maker and allocates resources and assesses performance based upon financial information at the consolidated level.

NOTE 2—SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

Significant accounting policies: Our significant accounting policies are disclosed in the Partnership’s Annual Report on Form 10-K for the year ended December 31, 2015. There have been no changes in such policies or the application of such policies during the nine months ended September 30, 2016.

New accounting pronouncements: In May 2014, the Financial Accounting Standards Board (the “FASB”) issued an accounting standards update on a comprehensive new revenue recognition standard that will supersede Accounting Standards Codification (“ASC”) 605, Revenue Recognition. The new accounting guidance creates a framework under which an entity will allocate the transaction price to separate performance obligations and recognize revenue when each performance obligation is satisfied. Under the new standard, entities will be required to use judgment and make estimates, including identifying performance obligations in a contract, estimating the amount of variable consideration to include in the transaction price, allocating the transaction price to each separate performance obligation, and determining when an entity satisfies its performance obligations. The standard allows for either “full retrospective” adoption, meaning the standard is applied to all of the periods presented with a cumulative catch-up as of the earliest period presented, or “modified retrospective” adoption, meaning the standard is applied only to the most current period presented in the financial statements with a cumulative catch-up as of the current period. In July 2015, the FASB decided to defer the original effective date by one year to be effective for annual reporting periods beginning after December 15, 2017 instead of December 15, 2016 for public entities. The Partnership is evaluating the impact that the new accounting guidance will have on its consolidated financial statements and related disclosures and has not yet determined the method by which it will adopt the standard.

In February 2016, the FASB issued Accounting Standard Update (“ASU”) No. 2016-02, Leases (Topic 842), which requires lessees to recognize the lease assets and lease liabilities classified as operating leases on the balance sheet. The amendment will be effective for reporting periods beginning on or after December 15, 2018, and early adoption is permitted. The Partnership is evaluating the impact that the new accounting guidance will have on its consolidated financial statements and related disclosures.

In March 2016, the FASB issued ASU No. 2016-09, Compensation – Stock Compensation (Topic 718): Improvements to employee share-based payment accounting, which includes provisions intended to simplify various aspects related to how share-based compensation payments are accounted for and presented in the financial statements. This amendment will be effective prospectively for reporting periods beginning on or after December 15, 2016, and early adoption is permitted. The Partnership is evaluating the impact that the new accounting guidance will have on its consolidated financial statements and related disclosures.

In August 2016, the FASB issued ASU 2016-15, Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments, to address diversity in practice of how certain cash receipts and cash payments are currently presented and classified in the statement of cash flows. The ASU addresses the topic of separately identifiable cash flows and application of the predominance principle. Classification of cash receipts and payments that have aspects of more than one class of cash flows should be determined first by applying specific guidance, and then by the nature of each separately identifiable cash flow. In situations where there is an absence of specific guidance and the cash flow has aspects of more than one type of classification, the predominance principle should be applied whereby the cash flow classification should depend on the activity that is likely to be the predominant source or use of cash flows. The amendments in this ASU are effective for public business entities for fiscal years beginning after December 15, 2017 and interim periods within those fiscal years. Early adoption is permitted. The Partnership is evaluating the impact that the new accounting guidance will have on its consolidated financial statements and related disclosures

NOTE 3—ASSET RETIREMENT OBLIGATIONS

The asset retirement obligation (“ARO”) liability reflects the present value of estimated costs of dismantlement, removal, site reclamation, and similar activities associated with the Partnership’s working-interest oil and natural gas properties. The Partnership utilizes current retirement costs to estimate the expected cash outflows for retirement obligations. The Partnership estimates the ultimate productive life of its properties, a credit-adjusted risk-free rate, and an inflation factor in order to determine the current present value of this obligation. To the extent future revisions to these assumptions impact the

6

BLACK STONE MINERALS, L.P. AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

present value of the existing ARO liability, a corresponding adjustment is made to the oil and natural gas property balance. The following table describes changes to the Partnership’s ARO liability during the period:

	For the nine months ended
	September 30, 2016
	(In thousands)
Beginning asset retirement obligations	$	10,585
Liabilities incurred	202
Liabilities settled	(237		)
Accretion expense	680
Revisions	136
Ending asset retirement obligations	$	11,366

NOTE 4—ACQUISITIONS

Acquisitions of proved oil and natural gas properties and working interests are considered business combinations and are recorded at their estimated fair value as of the acquisition date. Acquisitions of unproved oil and natural gas properties are considered asset acquisitions and are recorded at cost.

On January 8, 2016, the Partnership acquired mineral and royalty interests in the Permian Basin for $10.0 million in cash.

On June 15, 2016, the Partnership acquired an oil and natural gas mineral asset package primarily located in Weld County, Colorado for $34.0 million in cash. The following table summarizes the fair values assigned to the properties acquired:

	(In thousands)
Proved oil and natural gas properties	$	18,948
Unproved oil and natural gas properties	14,082
Net working capital	1,038
Asset retirement obligations	(50		)
Total fair value	$	34,018

On June 17, 2016, the Partnership acquired a diverse oil and natural gas mineral package from Freeport-McMoRan Oil and Gas, Inc. for $87.6 million in cash. The following table summarizes the fair values assigned to the properties acquired:

	(In thousands)
Proved oil and natural gas properties	$	20,787
Unproved oil and natural gas properties	65,745
Net working capital	1,026
Total fair value	$	87,558

On August 8, 2016, the Partnership acquired mineral interests located in Midland and Glasscock counties of Texas for $8.3 million in cash.

Throughout 2016, the Partnership funded certain other oil and natural gas asset acquisitions for an aggregate amount of $1.0 million in cash.

NOTE 5—DERIVATIVES AND FINANCIAL INSTRUMENTS

The Partnership’s ongoing operations expose it to changes in the market price for oil and natural gas. To mitigate the inherent commodity price risk associated with its operations, the Partnership uses oil and natural gas derivative instruments.

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BLACK STONE MINERALS, L.P. AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

From time to time, such instruments may include fixed-price-swap contracts, fixed price contracts, costless collars, and other contractual arrangements. The Partnership enters into oil and natural gas derivative instrument contracts that contain netting arrangements with each counterparty. The Partnership does not enter into derivative instruments for speculative purposes.

As of September 30, 2016, the Partnership’s open derivative contracts consisted of only fixed-price-swap contracts. A fixed-price-swap contract between the Partnership and the counterparty specifies a fixed commodity price and a future settlement date. The Partnership will receive from, or pay to, the counterparty the difference between the fixed-swap price and the market price on the settlement date. We have not designated any of our contracts as fair value or cash flow hedges. Accordingly, the changes in fair value of the contracts are included in the consolidated statement of operations in the period of the change. All derivative gains and losses from our derivative contracts have been recognized in “Revenue” on our consolidated statements of operations. All derivative instruments that have not yet been settled in cash are reflected as either derivative assets or liabilities in the Partnership’s accompanying consolidated balance sheets as of September 30, 2016 and December 31, 2015. See Note 6 – Fair Value Measurement for further discussion.

The table below summarizes the fair value and classification of the Partnership’s derivative instruments:

As of September 30, 2016
Classification	Balance Sheet Location	Gross Fair Value		Effect of Counterparty Netting			Net Carrying Value on Balance Sheet
				(In thousands)
Assets:
Current asset	Commodity derivative assets	$	15,269	$	(1,984	)	$	13,285
Long-term asset	Deferred charges and other long-term assets	73		(50		)	23
Total assets		$	15,342	$	(2,034	)	$	13,308
Liabilities:
Current liability	Commodity derivative liabilities	$	2,121	$	(1,984	)	$	137
Long-term liability	Commodity derivative liabilities	202		(50		)	152
Total liabilities		$	2,323	$	(2,034	)	$	289

As of December 31, 2015
Classification	Balance Sheet Location	Gross Fair Value		Effect of Counterparty Netting		Net Carrying Value on Balance Sheet
				(In thousands)
Assets:
Current asset	Commodity derivative assets	$	48,260	$	—	$	48,260
Long-term asset	Deferred charges and other long-term assets	16,274		—		16,274
Total assets		$	64,534	$	—	$	64,534
Liabilities:
Current liability	Commodity derivative liabilities	$	—	$	—	$	—
Long-term liability	Commodity derivative liabilities	—		—		—
Total liabilities		$	—	$	—	$	—

8

BLACK STONE MINERALS, L.P. AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

Changes in the fair values of the Partnership’s derivative instruments (both assets and liabilities) are presented on a net basis in the accompanying consolidated statements of operations. Changes in the fair value of the Partnership’s commodity derivative instruments (both assets and liabilities) are as follows:

	For the Nine Months Ended September 30,
Derivatives not designated as hedging instruments	2016			2015
	(In thousands)
Beginning fair value of commodity derivative instruments	$	64,534		$	37,471
Gain (loss) on oil derivative instruments	(8,906		)	37,305
Gain (loss) on natural gas derivative instruments	(3,389		)	20,145
Net cash received on settlements of oil derivative    instruments	(23,034		)	(32,274		)
Net cash received on settlements of natural gas    derivative instruments	(16,186		)	(14,258		)
Net change in fair value of commodity derivative    instruments	(51,515		)	10,918
Ending fair value of commodity derivative instruments	$	13,019		$	48,389

The Partnership had the following open derivative contracts for oil as of September 30, 2016:

				Range (Per Bbl)
Period and Type of Contract	Volume (Bbl)	Weighted Average (Per Bbl)		Low		High
Oil Swap Contracts:
2016
Third Quarter	190,000	$	54.32	$	35.74	$	62.53
Fourth Quarter	598,000	54.68		36.31		63.07
2017
First Quarter	364,000	$	62.69	$	52.73	$	63.65
Second Quarter	339,000	54.00		53.49		54.38

The Partnership had the following open derivative contracts for natural gas as of September 30, 2016:

				Range (Per MMBtu)
Period and Type of Contract	Volume (MMBtu)	Weighted Average (Per MMBtu)		Low		High
Natural Gas Swap Contracts:
2016
Fourth Quarter	8,820,000	$	3.11	$	2.29	$	3.41
2017
First Quarter	8,040,000	$	3.42	$	3.08	$	3.52
Second Quarter	7,550,000	3.10		2.85		3.18
Third Quarter	6,820,000	2.97		2.90		3.12
Fourth Quarter	6,170,000	3.08		2.92		3.29

9

BLACK STONE MINERALS, L.P. AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

The Partnership entered into the following derivative contracts for oil subsequent to September 30, 2016:

	Volume (Bbl)	Weighted Average (Per Bbl)		Range (Per Bbl)
Period and Type of Contract				Low		High
Oil Swap Contracts:
2017
First Quarter	30,000	$	50.77	$	50.34	$	51.20
Second Quarter	66,000	51.69		51.45		51.96
Third Quarter	396,000	52.63		52.04		53.24
Fourth Quarter	396,000	53.12		52.57		53.67

The Partnership entered into the following derivative contracts for natural gas subsequent to September 30, 2016:

	Volume (MMBtu)	Weighted Average (Per MMBtu)		Range (Per MMBtu)
Period and Type of Contract				Low		High
Natural Gas Swap Contracts:
2016
Fourth Quarter	540,000	$	3.02	$	2.89	$	3.15
2017
First Quarter	810,000	$	3.27	$	3.23	$	3.32
Second Quarter	750,000	2.98		2.96		3.00
Third Quarter	910,000	3.03		3.01		3.10
Fourth Quarter	870,000	3.11		3.03		3.28

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BLACK STONE MINERALS, L.P. AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

NOTE 6—FAIR VALUE MEASUREMENT

Fair value is defined as the amount at which an asset (or liability) could be bought (or incurred) or sold (or settled) in an orderly transaction between market participants at the measurement date. Further, ASC 820 establishes a framework for measuring fair value, establishes a fair value hierarchy based on the quality of inputs used to measure fair value, and includes certain disclosure requirements. Fair value estimates are based on either (i) actual market data or (ii) assumptions that other market participants would use in pricing an asset or liability, including estimates of risk.

ASC 820 establishes a three-level valuation hierarchy for disclosure of fair value measurements. The valuation hierarchy categorizes assets and liabilities measured at fair value into one of three different levels depending on the observability of the inputs employed in the measurement. The three levels are defined as follows:

Level 1—Unadjusted quoted prices for identical assets or liabilities in active markets.

Level 2—Quoted prices for similar assets or liabilities in non-active markets, and inputs that are observable for the asset or liability, either directly or indirectly, for substantially the full termof the financial instrument.

Level 3—Inputs that are unobservable and significant to the fair value measurement (including the Partnership’s own assumptions in determining fair value).

A financial instrument’s categorization within the valuation hierarchy is based upon the lowest level of input that is significant to the fair value measurement. The Partnership’s assessment of the significance of a particular input to the fair value measurement in its entirety requires judgment and considers factors specific to the asset or liability. There were no transfers into, or out of, the three levels of the fair value hierarchy for the nine months ended September 30, 2016 or the year ended December 31, 2015.

The carrying value of our cash and cash equivalents, receivables and payables approximate fair value due to the short-term nature of the instruments. The estimated carrying value of all debt as of September 30, 2016 and December 31, 2015 approximated the fair value due to variable market rates of interest. These debt fair values, which are Level 3 measurements, were estimated based on the Partnership’s incremental borrowing rates for similar types of borrowing arrangements, when quoted market prices were not available. The estimated fair values of the Partnership’s financial instruments are not necessarily indicative of the amounts that would be realized in a current market exchange.

Assets and Liabilities Measured at Fair Value on a Recurring Basis

The Partnership estimated the fair value of derivative instruments using the market approach via a model that uses inputs that are observable in the market or can be derived from, or corroborated by, observable data. See Note 5 – Derivatives and Financial Instruments for further discussion.

The following table presents information about the Partnership’s assets and liabilities measured at fair value on a recurring basis: 

	Fair Value Measurements Using						Effect of Counterparty Netting
	Level 1		Level 2		Level 3					Total
	(In thousands)
As of September 30, 2016
Financial Assets
Commodity derivative instruments	$	—	$	15,342	$	—	$	(2,034	)	$	13,308
Financial Liabilities
Commodity derivative instruments	—		2,323		—		(2,034		)	289
As of December 31, 2015
Financial Assets
Commodity derivative instruments	$	—	$	64,534	$	—	$	—		$	64,534
Financial Liabilities
Commodity derivative instruments	—		—		—		—			—

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BLACK STONE MINERALS, L.P. AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis

Nonfinancial assets and liabilities measured at fair value on a nonrecurring basis include certain nonfinancial assets and liabilities as may be acquired in a business combination and measurements of oil and natural gas property values for assessment of impairment.

The determination of the fair values of proved and unproved properties acquired in business combinations are estimated by discounting the projected cash flows from the acquired assets at market based rates of return. The factors used to determine fair value include estimates of economic reserves, future operating and development costs, future commodity prices, and a risk-adjusted discount rate. The Partnership has designated these measurements as Level 3. The Partnership’s fair value assessments for recent acquisitions are included in Note 4 – Acquisitions.

Oil and natural gas properties are measured at fair value on a nonrecurring basis using the income approach when assessing for impairment. Proved and unproved oil and natural gas properties are reviewed for impairment when events and circumstances indicate a possible decline in the recoverability of the carrying value of those properties. When assessing producing properties for impairment, the Partnership compares the expected undiscounted projected future cash flows of the producing properties to the carrying amount of the producing properties to determine recoverability. When the carrying amount exceeds its estimated undiscounted future cash flows, the carrying amount is written down to its fair value, which is measured as the present value of the projected future cash flows of such properties. The factors used to determine fair value include estimates of economic reserves, future operating and development costs, future commodity prices, and a risk-adjusted discount rate.

The Partnership’s estimates of fair value have been determined at discrete points in time based on relevant market data. These estimates involve uncertainty and cannot be determined with precision. There were no significant changes in valuation techniques or related inputs as of September 30, 2016 or December 31, 2015.

The following table presents information about the Partnership’s assets measured at fair value on a nonrecurring basis:

	Fair Value Measurements Using						Net Book Value1
	Level 1		Level 2		Level 3				Impairment
	(In thousands)
Three months ended September 30, 2016
Impaired oil and natural gas properties	$	—	$	—	$	—	$	—	$	—
Three months ended September 30, 2015
Impaired oil and natural gas properties	$	—	$	—	$	37,959	$	62,813	$	24,854
Nine months ended September 30, 2016
Impaired oil and natural gas properties	$	—	$	—	$	3,042	$	9,817	$	6,775
Nine months ended September 30, 2015
Impaired oil and natural gas properties	$	—	$	—	$	127,630	$	284,313	$	156,683

¹ Amount represents net book value at the date of assessment.

NOTE 7—CREDIT FACILITY

The Partnership maintains a senior secured revolving credit agreement (the “Senior Line of Credit”). The Senior Line of Credit has a maximum credit amount of $1.0 billion. On October 28, 2015, the Senior Line of Credit was amended to extend the term of the agreement from February 3, 2017 to February 4, 2019. The amount of the borrowing base is derived from the value of the Partnership’s oil and natural gas properties as determined by the lender syndicate using pricing assumptions that often differ from the current market for future prices. The Partnership’s semi-annual borrowing base redetermination process resulted in a decrease of the borrowing base from $550.0 million to $450.0 million, effective April 15, 2016. The Partnership's fall 2016 borrowing base redetermination process resulted in an increase in the borrowing base from $450.0 million to $500.0 million, which became effective October 31, 2016. Drawings on the Senior Line of Credit are used for the acquisition of oil and natural gas properties and for other general business purposes.

Throughout 2016, borrowings under the Senior Line of Credit bore interest at LIBOR plus a margin between 1.50% and 2.50%, or the Prime rate plus a margin between 0.50% and 1.50%, with the margin depending on the borrowing base utilization

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BLACK STONE MINERALS, L.P. AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

percentage of the loan. The prime rate is determined to be the higher of the financial institution’s prime rate or the federal funds effective rate plus 0.50% per annum.

Effective October 31, 2016, borrowings under the Senior Line of Credit bore interest at LIBOR plus a margin between 2.00% and 3.00%, or the Prime rate plus a margin between 1.00% and 2.00%, with the margin depending on the borrowing base utilization of the loan.

The weighted-average interest rate of the Senior Line of Credit was 2.53% and 1.92% as of September 30, 2016 and December 31, 2015, respectively. Accrued interest is payable at the end of each calendar quarter or at the end of each interest period, unless the interest period is longer than 90 days in which case interest is payable at the end of every 90-day period. In addition, a commitment fee is payable at the end of each calendar quarter based on either a rate of 0.375% if the borrowing base utilization percentage is less than 50%, or 0.500% per annum if the borrowing base utilization percentage is equal to or greater than 50%. The Senior Line of Credit is secured by substantially all of the Partnership’s producing oil and natural gas assets.

The Senior Line of Credit contains various limitations on future borrowings, leases, hedging, and sales of assets. Additionally, the Senior Line of Credit requires the Partnership to maintain a current ratio of not less than 1.0:1.0 and a ratio of total debt to EBITDAX (Earnings before Interest, Taxes, Depreciation, Amortization, and Exploration) of not more than 3.5:1.0. As of September 30, 2016, the Partnership was in compliance with all financial covenants for the Senior Line of Credit.

The aggregate principal balance outstanding was $299.0 million and $66.0 million at September 30, 2016 and December 31, 2015, respectively. The unused portion of the available borrowings under the Senior Line of Credit was $151.0 million and $484.0 million at September 30, 2016 and December 31, 2015, respectively.

NOTE 8—COMMITMENTS AND CONTINGENCIES

Environmental Matters

The Partnership’s business includes activities that are subject to U.S. federal, state, and local environmental regulations with regard to air, land, and water quality and other environmental matters.

The Partnership does not consider the potential remediation costs that could result from issues identified in any environmental site assessments to be significant to the consolidated financial statements and no provision for potential remediation costs has been made.

Litigation

From time to time, the Partnership is involved in legal actions and claims arising in the ordinary course of business. The Partnership believes existing claims as of September 30, 2016 will be resolved without material adverse effect on the Partnership’s financial condition or operations.

NOTE 9—INCENTIVE COMPENSATION

On January 12, 2016, each non-employee director on the Board of Directors of the Partnership’s general partner (the “Board”) was granted 12,368 fully vested common units for service during 2015. On February 19, 2016, the Compensation Committee of the Board approved a grant of awards to each of the Partnership’s executive officers and certain other employees. These awards consisted of restricted common units and restricted performance units (in the form of phantom units) with distribution equivalent rights. The grants included 717,654 restricted common units subject to limitations on transferability, customary forfeiture provisions, and service-based graded vesting requirements through January 7, 2019. The holders of restricted common unit awards have all of the rights of a common unitholder, including non-forfeitable distribution rights with respect to their restricted common units. The grant-date fair value of these awards, net of estimated forfeitures, is recognized ratably using the straight-line attribution method. The Compensation Committee of the Board also approved a grant of 717,654 restricted performance units that are subject to both performance-based and service-based vesting provisions. The number of common units issued to a recipient upon vesting of a restricted performance unit will be calculated based on performance against certain metrics that relate to the Partnership’s average performance over each calendar year during the performance period commencing January 1, 2016. The target number of common units subject to each restricted performance unit is one; however, based on the achievement of performance criteria, the number of common units that may be received in settlement of

13

BLACK STONE MINERALS, L.P. AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

each restricted performance unit can range from zero to two times the target number. The restricted performance units are eligible to become earned at the end of the performance period on December 31, 2018.  Compensation expense related to the restricted performance unit awards is determined by multiplying the number of common units underlying such awards that, based on the Partnership’s estimate, are likely to vest, by the grant-date fair value and recognized using the accelerated attribution method. Distribution equivalent rights for the restricted performance unit awards that are expected to vest are charged to partners’ capital. The Compensation Committee of the Board also approved the dollar-value targets for performance-based short-term incentive compensation for executive officers of the Partnership and certain other employees. The Partnership expects to ultimately settle the authorized awards at the end of the performance period in common units of the Partnership.

On April 25, 2016, the Compensation Committee of the Board approved a resolution to change the settlement feature of certain employee long-term incentive compensation plans from cash to equity. As a result of the modification, $10.1 million of cash-settled liabilities were reclassified to equity-settled liabilities during the second quarter of 2016 and the remaining unamortized expense of the awards will be amortized as equity-settled liabilities.

The table below summarizes incentive compensation expense recorded in general and administrative expenses in the consolidated statements of operations for the three months and nine months ended September 30, 2016 and 2015, respectively.

	Three Months Ended September 30,				Nine Months Ended September 30,
Incentive compensation expense	2016		2015		2016		2015
	(In thousands)				(In thousands)
Cash—long-term incentive plan	$	580	$	3,434	$	2,990	$	10,914
Equity-based compensation—restricted common and subordinated units	4,487		3,136		10,420		7,086
Equity-based compensation—restricted performance units	3,066		2,070		11,105		3,330
Board of Directors incentive plan	428		484		1,385		2,636
Total incentive compensation expense	$	8,561	$	9,124	$	25,900	$	23,966

NOTE 10—REDEEMABLE PREFERRED UNITS

The Partnership had 52,691 and 77,216 preferred units outstanding with a carrying value of $54.0 million and $79.2 million as of September 30, 2016 and December 31, 2015, respectively. The aforementioned amounts included accrued distributions of $1.3 million and $1.9 million as of September 30, 2016 and December 31, 2015, respectively. The redeemable preferred units are classified as mezzanine equity on the consolidated balance sheets since redemption is outside the control of the Partnership. The preferred units are entitled to an annual distribution of 10% of the funded capital of the preferred units, payable on a quarterly basis in arrears.

The preferred units are convertible into common and subordinated units at any time at the option of the preferred unitholders. The preferred units have an adjusted conversion price of $14.2683 and an adjusted conversion rate of 30.3431 common units and 39.7427 subordinated units per preferred unit, which reflects the reverse split described in Note 1 – Business and Basis of Presentation and the capital restructuring related to the IPO. The preferred unitholders can elect to have the Partnership redeem, at face value, up to 28,266 preferred units as of December 31, 2017 and 24,425 preferred units as of December 31, 2018, plus any accrued and unpaid distributions. 

The Partnership shall have the right, at its sole option, to redeem an amount of preferred units equal to the units being redeemed by an owner of preferred units as of each December 31. Any amount of a given year’s preferred units eligible for redemption not redeemed as of December 31 shall automatically convert to common and subordinated units in the following year.

For the nine months ended September 30, 2016, 18,461 preferred units were redeemed for $19.0 million, including accrued unpaid yield. For the nine months ended September 30, 2016, 6,064 preferred units totaling $6.1 million were converted into 184,006 common units and 240,986 subordinated units as a result of the mandatory conversion subsequent to December 31, 2015. For the year ended December 31, 2015, 39,240 preferred units totaling $39.2 million were converted into the equivalent of 1,190,664 common units and 1,559,502 subordinated units on an adjusted basis.

14

BLACK STONE MINERALS, L.P. AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

NOTE 11—EARNINGS PER UNIT

The Partnership applies the two-class method for purposes of calculating earnings per unit (“EPU”). The holders of the Partnership’s restricted common and subordinated units have all the rights of a unitholder, including non-forfeitable distribution rights. As participating securities, the restricted common and subordinated units are included in the calculation of basic earnings per unit. For the periods presented, the amount of earnings allocated to these participating units was not material. Net income (loss) attributable to the Partnership is allocated to the Partnership’s general partner and the common and subordinated unitholders in proportion to their pro rata ownership after giving effect to distributions, if any, declared during the period. The redeemable preferred units could be converted into 1.6 million common units and 2.1 million subordinated units as of September 30, 2016. At September 30, 2016, if the redeemable preferred units were converted to common and subordinated units, the effect would be anti-dilutive. Therefore, the redeemable preferred units are not included in the diluted EPU calculation. The Partnership’s restricted performance unit awards are contingently issuable units that are considered in the calculation of diluted EPU. The Partnership assesses the number of units that would be issuable, if any, under the terms of the arrangement if the end of the reporting period were the end of the contingency period. For the nine months ended September 30, 2016, there were 271,256 common units related to the Partnership’s restricted performance unit awards included in the calculation of diluted EPU.

The following table sets forth the computation of basic and diluted earnings per common and subordinated unit:

	For the Three Months Ended September 30,						For the Nine Months Ended September 30,
	2016			2015			2016			2015
	(In thousands, except per unit  amounts)						(In thousands, except per unit  amounts)
NET INCOME (LOSS)	$	37,535		$	53,892		$	27,474		$	(51,575	)
NET (INCOME) LOSS ATTRIBUTABLE TO PREDECESSOR	—			—			—			(450		)
NET (INCOME) LOSS ATTRIBUTABLE TO NONCONTROLLING INTERESTS SUBSEQUENT TO INITIAL PUBLIC OFFERING	8			(3		)	15			137
DISTRIBUTIONS ON REDEEMABLE PREFERRED UNITS SUBSEQUENT TO INITIAL PUBLIC OFFERING	(1,324		)	(2,973		)	(4,439		)	(4,783		)
NET INCOME (LOSS) ATTRIBUTABLE TO THE GENERAL PARTNER AND COMMON AND SUBORDINATED UNITS SUBSEQUENT TO INITIAL PUBLIC OFFERING	$	36,219		$	50,916		$	23,050		$	(56,671	)
ALLOCATION OF NET INCOME (LOSS) SUBSEQUENT TO INITIAL PUBLIC OFFERING ATTRIBUTABLE TO:
General partner interest	$	—		$	—		$	—		$	—
Common units	23,114			25,608			24,343			(28,502		)
Subordinated units	13,105			25,308			(1,293		)	(28,169		)
	$	36,219		$	50,916		$	23,050		$	(56,671	)
NET INCOME (LOSS) ATTRIBUTABLE TO LIMITED PARTNERS PER COMMON AND SUBORDINATED UNIT:
Per common unit (basic)	$	0.24		$	0.27		$	0.26		$	(0.30	)
Weighted average common units outstanding (basic)	95,740			96,186			95,086			96,183
Per subordinated unit (basic)	$	0.14		$	0.27		$	(0.01	)	$	(0.30	)
Weighted average subordinated units outstanding (basic)	95,189			95,057			95,125			95,057
Per common unit (diluted)	$	0.24		$	0.27		$	0.26		$	(0.30	)
Weighted average common units outstanding (diluted)	96,011			96,186			95,619			96,183
Per subordinated unit (diluted)	$	0.14		$	0.27		$	(0.01	)	$	(0.30	)
Weighted average subordinated units outstanding (diluted)	95,189			95,057			95,467			95,057

15

BLACK STONE MINERALS, L.P. AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

NOTE 12—SUBSEQUENT EVENTS                      

On October 5, 2016, Marc Carroll, Senior Vice President ("SVP") and Chief Financial Officer ("CFO"),  informed the Partnership that he will step down as CFO and SVP effective November 11, 2016. Mr. Carroll will enter into a consulting arrangement with the Partnership that will extend into 2017 to help ensure an orderly transition to his successor.

On October 24, 2016, the Partnership announced that it expects to appoint Jeffrey P. Wood as its SVP and CFO effective November 11, 2016. The Partnership expects that Mr. Wood will enter into a severance agreement with Black Stone Natural Resources Management Company, in a form substantially similar to that entered into by the General Partner’s other executive officers, that will provide for the payment of cash severance payments and benefits in the event Mr. Wood’s employment is terminated under certain circumstances, but he has not yet been entered into such agreement. The Partnership also expects that Mr. Wood will receive awards under the Partnership’s Long-Term Incentive Plan with terms substantially similar to the awards granted to the General Partner’s other executive officers, but it has not yet awarded him any grants under that plan.

As discussed in Note 7, the Partnership's fall 2016 borrowing base redetermination process resulted in an increase in the borrowing base from $450.0 million to $500.0 million with an effective date of October 31, 2016.

On November 7, 2016, the Board approved a distribution for the period June 30, 2016 to September 30, 2016 of $0.2875 per common unit and $0.18375 per subordinated unit. Distributions will be payable on November 25, 2016 to unitholders of record at the close of business on November 17, 2016.

16

Item 2. Management’s Discussion and Analysis of Financial Condition and Results of Operations

The following discussion and analysis of our financial condition and results of operations should be read in conjunction with our unaudited consolidated financial statements and notes thereto presented in this Quarterly Report on Form 10-Q, as well as our audited financial statements and notes thereto included in our Annual Report on Form 10-K for the year ended December 31, 2015. This discussion and analysis contains forward-looking statements that involve risks, uncertainties, and assumptions. Actual results may differ materially from those anticipated in these forward-looking statements as a result of a number of factors, including those set forth under “Cautionary Note Regarding Forward-Looking Statements” and “Part II, Item 1A. Risk Factors.”

Unless the context clearly indicates otherwise, references in this Quarterly Report on Form 10-Q to “BSM,” the “Partnership,” “we,” “our,” “us,” or similar terms for time periods prior to the IPO refer to Black Stone Minerals Company, L.P. and its subsidiaries, the predecessor for accounting purposes. For time periods subsequent to the IPO, these terms refer to Black Stone Minerals, L.P. and its subsidiaries.

Cautionary Note Regarding Forward-Looking Statements

Certain statements and information in this Quarterly Report on Form 10-Q may constitute “forward-looking statements.”  The words “believe,” “expect,” “anticipate,” “plan,” “intend,” “foresee,” “should,” “would,” “could,” or other similar expressions are intended to identify forward-looking statements, which are generally not historical in nature.  These forward-looking statements are based on our current expectations and beliefs concerning future developments and their potential effect on us.  While management believes that these forward-looking statements are reasonable as and when made, there can be no assurance that future developments affecting us will be those that we anticipate.  All comments concerning our expectations for future revenues and operating results are based on our forecasts for our existing operations and do not include the potential impact of any future acquisitions.  Our forward-looking statements involve significant risks and uncertainties (some of which are beyond our control) and assumptions that could cause actual results to differ materially from our historical experience and our present expectations or projections.  Important factors that could cause actual results to differ materially from those in the forward-looking statements include, but are not limited to, those summarized below:

• our ability to execute our business strategies;

• the volatility of realized oil and natural gas prices;

• the level of production on our properties;

• regional supply and demand factors, delays, or interruptions of production;

• our ability to replace our oil and natural gas reserves;

• our ability to identify, complete, and integrate acquisitions;

• general economic, business, or industry conditions;

• competition in the oil and natural gas industry;

• the ability of our operators to obtain capital or financing needed for development and exploration operations;

• title defects in the properties in which we invest;

• the availability or cost of rigs, equipment, raw materials, supplies, oilfield services, or personnel;

• restrictions on the use of water;

• the availability of transportation facilities;

• the ability of our operators to comply with applicable governmental laws and regulations and to obtain permits and governmental approvals;

17

• federal and state legislative and regulatory initiatives relating to hydraulic fracturing;

• future operating results;

• future cash flows and liquidity, including our ability to generate sufficient cash to pay quarterly distributions;

• exploration and development drilling prospects, inventories, projects, and programs;

• operating hazards faced by our operators;

• the ability of our operators to keep pace with technological advancements; and 

• certain factors discussed elsewhere in this filing.

For additional information regarding known material factors that could cause our actual results to differ from our projected results, please see “Risk Factors” in our Annual Report on Form 10-K.

Readers are cautioned not to place undue reliance on forward-looking statements, which speak only as of the date hereof.  We undertake no obligation to publicly update or revise any forward-looking statements after the date they are made, whether as a result of new information, future events, or otherwise.

Overview

We are one of the largest owners of oil and natural gas mineral interests in the United States. Our principal business is maximizing the value of our existing portfolio of mineral and royalty assets through active management and expanding our asset base through acquisitions of additional mineral and royalty interests. We maximize value through marketing our mineral assets for lease, creatively structuring terms on those leases to encourage and accelerate drilling activity, and selectively participating alongside our lessees on a working-interest basis in low-risk development-drilling opportunities on our interests. Our primary business objective is to grow our reserves, production, and cash generated from operations over the long term, while paying, to the extent practicable, a growing quarterly distribution to our unitholders.

On May 1, 2015 our common units began trading on the New York Stock Exchange under the symbol “BSM.” On May 6, 2015, we completed our initial public offering of 22,500,000 common units representing limited partner interests at a price to the public of $19.00 per common unit.  

As of September 30, 2016, our mineral and royalty interests were located in 41 states and 61 onshore basins in the continental United States. These non-cost-bearing interests include ownership in over 45,000 producing wells. We also own non-operated working interests, largely on our mineral and royalty interests. We recognize oil and natural gas revenue from our mineral and royalty and non-operated working interests in producing wells when the oil and natural gas production from the associated acreage is sold. Our other sources of revenue include mineral lease bonus and delay rentals, which are recognized as revenue according to the terms of the lease agreements.

Recent Developments

Common Unit Repurchase Program

On March 4, 2016, the Board of Directors of our general partner (the “Board”) authorized the repurchase of up to $50.0 million in common units through a program that terminated on September 15, 2016. The repurchase program authorized us to make repurchases on a discretionary basis as determined by management, subject to market conditions, applicable legal requirements, available liquidity, and other appropriate factors. We repurchased a total of 1.3 million common units for an aggregate cost of $24.7 million. The repurchase program was funded from our cash on hand or available revolving credit facility. Repurchased common and subordinated units were canceled.

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Acquisitions

On January 8, 2016, we acquired mineral and royalty interests in the Permian Basin for $10.0 million. On June 15, 2016, we acquired an oil and natural gas mineral package primarily located in Weld County, Colorado for $34.0 million. On June 17, 2016, we acquired a diverse oil and natural gas mineral asset package from Freeport-McMoRan Oil and Gas Inc. and certain of its affiliates for $87.6 million. On August 8, 2016, the Partnership acquired mineral interests located in Midland and Glasscock Counties of Texas for $8.3 million. Throughout 2016, the Partnership acquired certain other oil and natural gas assets for $1.0 million in the aggregate.

Business Environment

The information presented below is designed to give a broad overview of the oil and natural gas business environment as it affects us.

Commodity Prices

Oil and natural gas prices have been historically volatile based upon the dynamics of supply and demand. Recently, oil and natural gas prices have remained significantly below prices seen over the past five years. The Energy Information Administration (“EIA”) expects global oil inventory builds to continue in the near future but the builds are forecast to remain well below the levels that occurred in 2015 and early 2016; consistent inventory draws are forecast to begin in mid 2017. Despite continued increases in global oil inventories and U.S. oil rig counts, market reactions to a potential Organization of Petroleum Exporting Countries ("OPEC") production freeze deal could put upward price pressure on prices in the near term. After an unofficial meeting in Algeria on September 28, 2016, members of OPEC announced a framework agreement that could lead to a cap on OPEC crude oil production. Important details of the agreement, including target outputs for individual countries, remain to be established at a regularly scheduled meeting in November; even if a consensus is reached, the extent of compliance with such an agreement is questionable. During the nine months ended September 30, 2016, the West Texas Intermediate (“WTI”) spot price reached a low of $26.19 per Bbl on February 11, 2016, but rebounded to a high of $51.23 per Bbl on June 8, 2016.

The EIA forecasts natural gas production will increase through 2016 and through 2017. Natural gas pipeline exports to Mexico have risen in 2016. The EIA projects the liquified natural gas ("LNG") gross exports will rise with the start of Cheniere Energy Inc.'s Sabine Pass LNG plant in Louisiana.  The EIA projects that increases in natural gas prices will continue to gradually rise through the remainder of 2016 and 2017. During the nine months ended September 30, 2016, Henry Hub spot natural gas prices ranged from a low of $1.49 per MMBtu on March 4, 2016 to a high of $3.19 per MMBtu on September 21, 2016.

To manage the variability in cash flows associated with the projected sale of our oil and natural gas production, we use various derivative instruments, which have recently consisted of fixed-price swap contracts.

The following table reflects commodity prices at the end of each quarter for the periods presented:

	2016						2015
Benchmark Prices	Third Quarter		Second Quarter		First Quarter		Third Quarter		Second Quarter		First Quarter
WTI spot oil price ($/Bbl)	$	47.72	$	48.27	$	36.94	$	45.06	$	59.48	$	47.72
Henry Hub spot natural gas ($/MMBtu)	$	2.84	$	2.94	$	1.98	$	2.47	$	2.80	$	2.65

Source: EIA

Rig Count

As we are not an operator, drilling on our acreage is dependent upon the exploration and production companies that lease our acreage. In addition to drilling plans that we seek from our operators, we also monitor rig counts in an effort to identify existing and future leasing and drilling activity on our acreage.

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The following table shows the rig count at the close of each quarter for the periods presented:

	2016			2015
U.S. Rotary Rig Count	Third Quarter	Second Quarter	First Quarter	Third Quarter	Second Quarter	First Quarter
Oil	425	330	372	641	628	813
Natural gas	96	90	92	197	228	233
Other	1	1	—	—	3	2
Total	522	421	464	838	859	1,048

Source: Baker Hughes Incorporated

Natural Gas Storage

A substantial portion of our revenue is derived from sales of oil production attributable to our interests; however, the majority of our production is natural gas. Natural gas prices are significantly influenced by storage levels throughout the year. Accordingly, we monitor the natural gas storage reports regularly in the evaluation of our business and its outlook.

Historically, natural gas supply and demand fluctuates on a seasonal basis. From April to October, when the weather is warmer and natural gas demand is lower, natural gas storage levels generally increase. From November to March, storage levels typically decline as utility companies draw natural gas from storage to meet increased heating demand due to colder weather. In order to maintain sufficient storage levels for increased seasonal demand, a portion of natural gas production during the summer months must be used for storage injection. The portion of production used for storage varies from year to year depending on the demand from the previous winter and the demand for electricity used for cooling during the summer months. Natural gas injections during the refill season have been below the five-year average levels in most weeks due to the high use of natural gas for electricity generation. Warm weather last winter left inventories at record high levels going into the injection season so current natural gas stock levels remain substantially higher than five-year average levels.

The following table shows natural gas storage volumes by region at the close of each quarter for the periods presented:

	2016			2015
Region	Third Quarter	Second Quarter	First Quarter	Third Quarter	Second Quarter	First Quarter
	(Bcf)
East	899	632	439	837	552	255
Midwest	1,045	742	555	952	546	261
Mountain	237	198	147	201	155	114
Pacific	318	315	262	355	333	269
South Central	1,181	1,253	1,065	1,192	993	562
Total	3,680	3,140	2,468	3,537	2,579	1,461

Source: EIA

How We Evaluate Our Operations

We use a variety of operational and financial measures to assess our performance. Among the measures considered by management are the following:

• volumes of oil and natural gas produced;

• commodity prices including the effect of derivative instruments; and

• EBITDA, Adjusted EBITDA, and cash available for distribution.

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Volumes of Oil and Natural Gas Produced

In order to track and assess the performance of our assets, we monitor and analyze our production volumes from the various basins and plays that comprise our extensive asset base. We also regularly compare projected volumes to actual reported volumes and investigate unexpected variances.

Commodity Prices

Factors Affecting the Sales Price of Oil and Natural Gas

The prices we receive for oil, natural gas, and natural gas liquids (“NGLs”) vary by geographical area. The relative prices of these products are determined by the factors affecting global and regional supply and demand dynamics, such as economic conditions, production levels, availability of transportation, weather cycles, and other factors. In addition, realized prices are influenced by product quality and proximity to consuming and refining markets. Any differences between realized prices and NYMEX prices are referred to as differentials. All of our production is derived from properties located in the United States. As a result of our geographic diversification, we are not exposed to concentrated differential risks associated with any single play, trend, or basin.

• Oil. The substantial majority of our oil production is sold at prevailing market prices, which fluctuate in response to many factors that are outside of our control. NYMEX light sweet crude oil, commonly referred to as WTI, is the prevailing domestic oil pricing index. The majority of our oil production is priced at the prevailing market price with the final realized price affected by both quality and location differentials.

The chemical composition of crude oil plays an important role in its refining and subsequent sale as petroleum products.  As a result, variations in chemical composition relative to the benchmark crude oil, usually WTI, will result in price adjustments, which are often referred to as quality differentials. The characteristics that most significantly affect quality differentials include the density of the oil, as characterized by its American Petroleum Institute (“API”) gravity, and the presence and concentration of impurities, such as sulfur.

Location differentials generally result from transportation costs based on the produced oil’s proximity to consuming and refining markets and major trading points.

• Natural Gas. The NYMEX price quoted at Henry Hub is a widely used benchmark for the pricing of natural gas in the United States. The actual volumetric prices realized from the sale of natural gas differ from the quoted NYMEX price as a result of quality and location differentials. 

Quality differentials result from the heating value of natural gas measured in Btus and the presence of impurities, such as hydrogen sulfide, carbon dioxide, and nitrogen. Natural gas containing ethane and heavier hydrocarbons has a higher Btu value and will realize a higher volumetric price than natural gas made up of predominantly methane, which has a lower Btu value. Natural gas with a higher concentration of impurities will realize a lower volumetric price due to the presence of the impurities in the natural gas when sold or the cost of treating the natural gas to meet pipeline quality specifications.

Natural gas, which currently has a limited global transportation system, is subject to price variances based on local supply and demand conditions and the cost to transport natural gas to end user markets.

Hedging

We enter into derivative instruments to partially mitigate the impact of commodity price volatility on our cash generated from operations. From time to time, such instruments may include fixed-price swaps, fixed-price contracts, costless collars, and other contractual arrangements. We generally employ a “rolling hedge” strategy whereby we hedge a significant portion of our proved developed producing reserves 12 to 24 months into the future. The impact of these derivative instruments could affect the amount of revenue we ultimately realize. Since 2015, we have only entered into fixed-price swap contracts. Under fixed-price swap contracts, a counterparty is required to make a payment to us if the settlement price for any settlement period is less than the swap strike price. Conversely, we are required to make a payment to the counterparty if the settlement price for any settlement period is greater than the swap strike price. We may employ contractual arrangements other than fixed-price swap contracts in the future to mitigate the impact of price fluctuations. If commodity prices decline in the future, our hedging contracts will partially mitigate the effect of lower prices on our future revenue.

Our open oil and natural gas derivative contracts as of September 30, 2016 and as of the date of this filing are detailed in Note 5 – Derivatives and Financial Instruments to our unaudited consolidated financial statements included elsewhere in this

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Quarterly Report on Form 10-Q. Our credit agreement limits the extent to which we can hedge our future production. Under the terms of our credit agreement, we are able to hedge substantially all of our estimated production from our proved developed producing reserves based on the most recent reserve information provided to our lenders. We do not enter into derivative instruments for speculative purposes. Including derivative contracts entered into subsequent to September 30, 2016, we have hedged 92.6% and 78.7% of our available oil and condensate hedge volumes and 96.8% and 99.7% of our available natural gas hedge volumes for the remainder of 2016 and 2017, respectively.

Non-GAAP Financial Measures

EBITDA, Adjusted EBITDA, and cash available for distribution are supplemental non-GAAP financial measures used by our management and external users of our financial statements such as investors, research analysts, and others, to assess the financial performance of our assets and our ability to sustain distributions over the long term without regard to financing methods, capital structure, or historical cost basis.

We define EBITDA as net income (loss) before interest expense, income taxes and depreciation, depletion, and amortization. We define Adjusted EBITDA as EBITDA adjusted for impairment of oil and natural gas properties, accretion of ARO, unrealized gains and losses on commodity derivative instruments, and non-cash equity-based compensation. We define cash available for distribution as Adjusted EBITDA plus or minus amounts for certain non-cash operating activities, estimated replacement capital expenditures, capital expenditures, cash interest expense, and distributions to noncontrolling interests and preferred unitholders.

EBITDA, Adjusted EBITDA, and cash available for distribution should not be considered an alternative to, or more meaningful than, net income (loss), income (loss) from operations, cash flows from operating activities, or any other measure of financial performance presented in accordance with GAAP as measures of our financial performance. EBITDA, Adjusted EBITDA, and cash available for distribution have important limitations as analytical tools because they exclude some but not all items that affect net income (loss), the most directly comparable GAAP financial measure. Our computation of EBITDA, Adjusted EBITDA, and cash available for distribution may differ from computations of similarly titled measures of other companies.

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The following table presents a reconciliation of EBITDA, Adjusted EBITDA, and cash available for distribution to net income (loss), the most directly comparable GAAP financial measure, for the periods indicated:

	Three Months Ended September 30,						Nine Months Ended September 30,
	2016			2015			2016			2015
	(Unaudited) (In thousands)
Net income (loss)	$	37,535		$	53,892		$	27,474		$	(51,575	)
Adjustments to reconcile to Adjusted EBITDA:
Add:
Depreciation, depletion and amortization	28,731			23,288			79,654			83,414
Interest expense	2,282			870			4,773			5,530
EBITDA	68,548			78,050			111,901			37,369
Add:
Impairment of oil and natural gas properties	—			24,854			6,775			156,683
Accretion of asset retirement obligations	206			265			680			805
Equity-based compensation1	7,981			5,690			33,120			13,052
Unrealized loss on commodity derivative instruments	—			—			51,515			—
Less:
Unrealized gain on commodity derivative instruments	(2,511		)	(44,053		)	—			(10,918		)
Adjusted EBITDA	74,224			64,806			203,991			196,991
Adjustments to reconcile to cash generated from operations:
Add:
Incremental general and administrative related to initial public offering	—			270			—			950
Loss on sales of assets, net	—			4			—			—
Less:
Change in deferred revenue	(396		)	(94		)	(175		)	(584		)
Cash interest expense	(2,083		)	(628		)	(4,179		)	(4,806		)
Gain on sales of assets, net	—			—			(4,772		)	(20		)
Estimated replacement capital expenditures2	(3,750		)	—			(7,500		)	—
Cash generated from operations	67,995			64,358			187,365			192,531
Less:
Cash paid to noncontrolling interests	(29		)	(45		)	(83		)	(167		)
Redeemable preferred unit distributions	(1,324		)	(2,973		)	(4,439		)	(8,823		)
Cash generated from operations available for distribution on common and subordinated units and reinvestment in our business	$	66,642		$	61,340		$	182,843		$	183,541

¹ On April 25, 2016, the Compensation Committee of the Board approved a resolution to change the settlement feature of certain employee long-term incentive compensation plans from cash to equity. As a result of the modification, $10.1 million of cash-settled liabilities were reclassified to equity-settled liabilities during the second quarter of 2016.

² On August 3, 2016, the Board established a replacement capital expenditure estimate of $15.0 million for the period of April 1, 2016 to March 31, 2017. There was no established estimate of replacement capital expenditure prior to this period.

Factors Affecting the Comparability of Our Financial Results

Our historical financial condition and results of operations for the periods presented may not be comparable, either from period to period or going forward, because we will incur higher general and administrative expenses than in prior periods as a result of operating as a publicly traded partnership. These incremental expenses include costs associated with SEC reporting requirements, including annual and quarterly reports to unitholders; tax return and Schedule K-1 preparation and distribution fees; Sarbanes-Oxley Act compliance; New York Stock Exchange listing fees; independent registered public accounting firm fees; legal fees, investor-relations activities, registrar and transfer agent fees; director and officer insurance; and additional compensation. These direct, incremental general and administrative expenses are not included in our historical results of operations for periods prior to our IPO.

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Results of Operations

Three Months Ended September 30, 2016 Compared to Three Months Ended September 30, 2015

The following table shows our production, revenues, pricing, and expenses for the periods presented:

	Three Months Ended September 30,
	2016		2015		Variance
	(Unaudited) (Dollars in thousands, except for realized prices and per Boe data)
Production:
Oil and condensate (MBbls)1	1,015		936		79		8.4	%
Natural gas (MMcf)1	13,207		10,411		2,796		26.9	%
Equivalents (MBoe)	3,216		2,671		545		20.4	%
Revenue:
Oil and condensate sales	$	42,780	$	44,128	(1,348	)	(3.1	)%
Natural gas and natural gas liquids sales	38,986		32,191		6,795		21.1	%
Gain (loss) on commodity derivative instruments	7,813		56,430		(48,617	)	(86.2	)%
Lease bonus and other income	9,592		4,271		5,321		124.6	%
Total revenue	$	99,171	$	137,020	(37,849	)	(27.6	)%
Realized prices:
Oil and condensate ($/Bbl)	$	42.15	$	47.15	(5.00	)	(10.6	)%
Natural gas ($/Mcf)1	2.95		3.09		(0.14	)	(4.5	)%
Equivalents ($/Boe)	$	25.42	$	28.57	(3.15	)	(11.0	)%
Operating expenses:
Lease operating expense	$	5,007	$	4,924	83		1.7	%
Production costs and ad valorem taxes	9,228		8,175		1,053		12.9	%
Exploration expense	6		1,817		(1,811	)	(99.7	)%
Depreciation, depletion, and amortization	28,731		23,288		5,443		23.4	%
Impairment of oil and natural gas properties	—		24,854		(24,854	)	(100.0	)%
General and administrative	16,677		18,994		(2,317	)	(12.2	)%
Other expense:
Interest expense	$	2,282	$	870	1,412		162.3	%
Per Boe:
Lease operating expense	$	1.56	$	1.84	(0.28	)	(15.2	)%
Lease operating expense (per working interest Boe)	4.25		6.71		(2.46	)	(36.7	)%
Production costs and ad valorem taxes	2.87		3.06		(0.19	)	(6.2	)%
Depreciation, depletion, and amortization	8.93		8.72		0.21		2.4	%
General and administrative	5.19		7.11		(1.92	)	(27.0	)%

¹   As a mineral-and-royalty-interest owner, we are often provided insufficient and inconsistent data on NGL volumes by our operators. As a result, we are unable to reliably determine the total volumes of NGLs associated with the production of natural gas on our acreage. Accordingly, no NGL volumes are included in our reported production; however, revenue attributable to NGLs is included in our natural gas revenue and our calculation of realized prices for natural gas.

Revenue

Total revenue for the quarter ended September 30, 2016 decreased compared to the quarter ended September 30, 2015. Production for the quarter ended September 30, 2016 averaged 35.0 MBoe per day, an increase of 6.0 MBoe per day compared to the corresponding period in 2015. The decrease in total revenue is primarily due to smaller gains from commodity derivative instruments as compared to the corresponding period in 2015. Increased production volumes and higher lease bonus partially offset the overall decrease in total revenue.

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Oil and condensate sales. Oil and condensate sales during the period were lower than the third quarter of 2015 primarily due to lower realized prices. Our total oil and condensate production was higher than the third quarter of 2015, but the increased production was more than offset by the decline in realized prices. Our mineral-and-royalty-interest oil and condensate volumes accountedfor74.0%and75.3%of total oil and condensate volumes for thequarters endedSeptember 30, 2016and2015, respectively.Ourmineral-and-royalty-interest oiland condensatevolumesincreased6.4%inthethird quarter of 2016relative tothecorresponding period in 2015,primarilydrivenby production increases from new wellsin theBakken/Three ForksandWolfcampplays. Our working-interest oil and condensate volumesincreased by14.4%during thethird quarter of 2016versus the same period in2015to2.9MBblsper day.

Natural gas and natural gas liquids sales. Natural gas and NGL sales increased for the quarter ended September 30, 2016 as compared to the same period for 2015. Higher production volumes, due to new wells in the Haynesville and Wilcox plays, were primarily responsible for the increase in our natural gas and NGL revenues. Lower realized natural gas and NGL prices for the quarter ended September 30, 2016 versus the corresponding period in 2015 partially offset the impact of increased production volumes. Mineral-and-royalty-interest production accounted for 58.4% and 71.0% of our natural gas volumes for the quarters ended September 30, 2016 and 2015, respectively.

Gain (loss) on commodity derivative instruments. During the third quarter of 2016, we recognized $3.7 million of gains from oil commodity contracts, which included cash received of $4.3 million, compared to gains of $41.0 million in the same period of 2015. During the third quarter of 2016, we recognized $4.1 million of gains from natural gas commodity contracts, which included cash received of $1.0 million, compared to recognized gains of $15.4 million in the same period of 2015.

Lease bonus and other income. When we lease our mineral interests, we generally receive an upfront cash payment, or a lease bonus. In the third quarter of 2016, we successfully closed several significant lease transactions. Specifically, these transactions related to the Wolfcamp play in Texas and the Marcellus/Utica play in Pennsylvania.

Operating and Other Expenses

Lease operating expense. Lease operating expense includes normally recurring expenses associated with our non-operated working interests necessary to produce hydrocarbons from our oil and natural gas wells, as well as certain nonrecurring expenses, such as well repairs. Lease operating expense increased for the quarter ended September 30, 2016 as compared to the same period in 2015, primarily due to costs associated with higher production volumes. Lower workover and other service-related expenses and a higher percentage of working-interest volumes being produced from natural gas wells partially offset the overall increase in lease operating expenses.  

Production costs and ad valorem taxes. Production taxes include statutory amounts deducted from our production revenues by various state taxing entities. Depending on the regulations of the states where the production originates, these taxes may be based on a percentage of the realized value or a fixed amount per production unit. This category also includes the costs to process and transport our production to applicable sales points. Ad valorem taxes are jurisdictional taxes levied on the value of oil and natural gas minerals and reserves. Rates, methods of calculating property values, and timing of payments vary between taxing authorities. For the quarter ended September 30, 2016, production costs and ad valorem taxes increased from the quarter ended September 30, 2015, generally as a result of higher production volumes. The 2016 amount includes $2.7 million of proceeds from a settlement related to improper cost deductions by an operator. In addition, lower realized prices and lower estimated mineral reserve valuations served to partially offset the increase in these costs.

Exploration expense. Exploration expense typically consists of dry-hole expenses and geological and geophysical costs, including seismic costs, and is expensed as incurred under the successful efforts method of accounting. Exploration expense signficantly decreased for the three months ended September 30, 2016 as compared to the same period in 2015. The 2015 expense represents costs incurred to acquire 3-D seismic information, related to our mineral and royalty interests, from a third-party service provider.

Depreciation, depletion, and amortization. Depletion is an estimate of the amount of cost basis of oil and natural gas properties attributable to the volume of hydrocarbons extracted during a period, calculated on a units-of-production basis. Estimates of proved developed producing reserves are a major component of the calculation of depletion. We adjust our depletion rates semi-annually based upon mid-year and year-end reserve reports, except when circumstances indicate that there has been a significant change in reserves or costs. Depreciation, depletion, and amortization increased for the quarter ended September 30, 2016 as compared to the same period in 2015, primarily due to the impact of higher production rates and costs associated with new reserve additions. A reduced cost basis resulting from impairment charges recorded during 2016 and the fourth quarter of 2015 favorably affected depletion expense.

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Impairment of oil and natural gas properties. Individual categories of oil and natural gas properties are assessed periodically to determine if the net book value for these properties has been impaired. Management periodically conducts an in-depth evaluation of the carrying amounts of property acquisitions, successful exploratory wells, development activity, undeveloped leasehold, and mineral interests to identify impairments. There were no impairments for the quarter ended September 30, 2016. Impairments totaled $24.9 million for the quarter ended September 30, 2015 primarily due to changes in reserve values resulting from declines in future expected net cash flows and other factors at September 30, 2015.

General and administrative. General and administrative expenses are costs not directly associated with the production of oil and natural gas and include the cost ofemployee salariesand related benefits, office expenses, and fees for professional services. For thequarter ended September 30, 2016, general and administrative expensesdecreasedas compared to the same period in2015. In 2016,costsattributableto our long-term incentive planswere approximately $2.0millionlowerthan in thecorrespondingprior periodin 2015.

Interest expense. Interest expense was higher in the third quarter of 2016 due to increased borrowings under our credit facility. Average outstanding borrowings during the third quarter of 2016 were higher than the third quarter of 2015 due to mid-year 2015 repayments towards our credit facility using proceeds received from our IPO during 2015.

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Nine Months Ended September 30, 2016 Compared to Nine Months Ended September 30, 2015

The following table shows our production, revenues, pricing, and expenses for the periods presented:

	Nine Months Ended September 30,
	2016			2015		Variance
	(Dollars in thousands, except for realized prices and per Boe data)
Production:
Oil and condensate (MBbls)1	2,848			2,668		180		6.7	%
Natural gas (MMcf)1	36,014			31,817		4,197		13.2	%
Equivalents (MBoe)	8,850			7,971		879		11.0	%
Revenue:
Oil and condensate sales	$	104,581		$	126,584	(22,003	)	(17.4	)%
Natural gas and natural gas liquids sales	85,706			92,799		(7,093	)	(7.6	)%
Gain (loss) on commodity derivative instruments	(12,295		)	57,450		(69,745	)	(121.4	)%
Lease bonus and other income	26,129			16,051		10,078		62.8	%
Total revenue	$	204,121		$	292,884	(88,763	)	(30.3	)%
Realized prices:
Oil and condensate ($/Bbl)	$	36.72		$	47.45	(10.73	)	(22.6	)%
Natural gas ($/Mcf)1	2.38			2.92		(0.54	)	(18.5	)%
Equivalents ($/Boe)	$	21.50		$	27.52	(6.02	)	(21.9	)%
Operating expenses:
Lease operating expense	$	14,179		$	16,540	(2,361	)	(14.3	)%
Production costs and ad valorem taxes	23,301			26,250		(2,949	)	(11.2	)%
Exploration expense	643			2,014		(1,371	)	(68.1	)%
Depreciation, depletion, and amortization	79,654			83,414		(3,760	)	(4.5	)%
Impairment of oil and natural gas properties	6,775			156,683		(149,908	)	(95.7	)%
General and administrative	52,213			53,530		(1,317	)	(2.5	)%
Other expense:
Interest expense	$	4,773		$	5,530	(757	)	(13.7	)%
Per Boe:
Lease operating expense	$	1.60		$	2.08	(0.48	)	(23.1	)%
Lease operating expense (per working interest Boe)	4.71			6.96		(2.25	)	(32.3	)%
Production costs and ad valorem taxes	2.63			3.29		(0.66	)	(20.1	)%
Depreciation, depletion, and amortization	9.00			10.46		(1.46	)	(14.0	)%
General and administrative	5.90			6.72		(0.82	)	(12.2	)%

¹  As a mineral-and-royalty-interest owner, we are often provided insufficient and inconsistent data on NGL volumes by our operators. As a result, we are unable to reliably determine the total volumes of NGLs associated with the production of natural gas on our acreage. Accordingly, no NGL volumes are included in our reported production; however, revenue attributable to NGLs is included in our natural gas revenue and our calculation of realized prices for natural gas.

Revenue

Total revenues for the nine months ended September 30, 2016 decreased compared to the nine months ended September 30, 2015. Production for the nine months ended September 30, 2016 averaged 32.3 MBoe per day, an increase of 3.1 MBoe per day, or 10.6%, compared to the corresponding period in 2015. The decrease in total revenue from the corresponding prior period is primarily due to a $69.7 million difference in the impact of commodity derivative instruments and effect of lower realized commodity prices, the impact of which totaled $50.0 million, partially offset by the impact of $10.1 million higher lease bonus and $20.8 million related to increased production volumes.

Oil and condensate sales. Oil and condensate sales during for the nine months ended September 30, 2016 were lower than the corresponding period in 2015 primarily due to lower realized prices. Oil and condensate production for the nine months ended September 30, 2016 was higher than in the nine months ended September 30, 2015, but the increased production

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was more than offset by a decline in realized prices. Our mineral-and-royalty-interest oil and condensate volumes accounted for 77.2% and 76.6% of total oil and condensate volumes for the nine months ended September 30, 2016 and 2015, respectively. Our mineral-and-royalty-interest oil and condensate volumes increased 7.5% for the nine months ended September 30, 2016 relative to the corresponding period in 2015, primarily driven by production increases from new wells in theBakken/Three Forks and Wolfcamp plays. Our working-interest oil and condensate volumes increased by 4.1% to 2.4 MBbls per day during the nine months ended September 30, 2016 versus the same period in 2015 primarily due to activity in the Bakken play.

Natural gas and natural gas liquids sales. Natural gas and NGL sales decreased for the nine months ended September 30, 2016 as compared to the same period for 2015. A decline in the realized natural gas and NGL price for the nine months ended September 30, 2016 versus the corresponding period in 2015 was primarily responsible for the decline in our natural gas and NGL revenues. The unfavorable price variance was partially offset by a 13.2% increase in production volumes.   This production increase was primarily generated by production from new wells in the Haynesville/Bossier and Wilcox plays.  Mineral-and-royalty-interest production accounted for 60.7% and 67.0% of our natural gas volumes for the nine months ended September 30, 2016 and 2015, respectively.

Gain (loss) on commodity derivative instruments. During the nine months ended September 30, 2016, we recognized $8.9 million of losses from oil commodity contracts, which included $23.0 million in cash received, compared to a recognized gain of $37.3 million in the same period of 2015. During the first nine months of 2016, we recognized $3.4 million of losses from natural gas commodity contracts, which included $16.2 million of cash received, compared to a recognized gain of $20.1 million in the same period of 2015.

Lease bonus and other income. Lease bonus and other income increased for the nine months ended September 30, 2016 as compared to the same period in 2015. In the first nine months of 2016, we successfully closed several significant lease transactions in Jasper, Tyler, Pecos and Newton counties of Texas, in the Red River parish of Louisiana, and in Pike and Potter counties of Pennsylvania.

Operating and Other Expenses

Lease operating expense. Lease operating expense decreased for the nine months ended September 30, 2016 as compared to the same period in 2015, primarily due to lower costs associated with workover and other service-related costs and a higher percentage of working-interest volumes being produced from natural gas wells.  

Production costs and ad valorem taxes. For the nine months ended September 30, 2016, production costs and ad valorem taxes decreased from the nine months ended September 30, 2015, generally as a result of lower realized prices and estimated mineral reserve valuations. In addition, the 2016 amount includes $2.7 million of proceeds from a settlement related to improper cost deductions by an operator.

Exploration expense. Exploration expense decreased for the nine months ended September 30, 2016 as compared to the same period in 2015. The 2016 and 2015 expense represents costs incurred to acquire 3-D seismic information, related to our mineral and royalty interests, from a third-party service provider.

Depreciation, depletion, and amortization.  Depreciation, depletion, and amortization decreased for the nine months ended September 30, 2016 as compared to the same period in 2015, primarily due to the impact of a reduced cost basis resulting from impairment charges recorded during 2016 and the fourth quarter of 2015. The impact of higher production rates and costs associated with new reserve additions partially offset the overall decrease in depreciation, depletion, and amortization.

Impairment of oil and natural gas properties. Impairments totaled$6.8million for the nine months ended September 30, 2016 primarily due to changes in reserve values resulting from declines in future expected realized net cash flows.

General and administrative. For the nine months ended September 30, 2016, general and administrative expenses decreased as compared to the same period in 2015. During the nine months ended September 30, 2016, costs attributable to our long-term incentive plans were $1.6 million lower than in the corresponding prior period of 2015.

Interest expense. Interest expense decreased due to lower average outstanding borrowings under our credit facility. Average outstanding borrowings during the first nine months of 2016 were lower than the nine months ended September 30, 2015, primarily due to payments made towards the outstanding balance of our credit facility subsequent to our IPO.

28

Liquidity and Capital Resources

Overview

Our primary sources of liquidity are cash generated from operations, borrowings under our credit facility, and proceeds from the issuance of equity and debt. Our primary uses of cash are for distributions to our unitholders and for investing in our business, specifically the acquisition of mineral and royalty interests and our selective participation on a non-operated working-interest basis in the development of our oil and natural gas properties. 

The board of directors of our general partner has adopted a policy pursuant to which distributions equal in amount to the applicable minimum quarterly distribution will be paid on each common and subordinated unit for each quarter to the extent we have sufficient cash generated from our operations after establishment of cash reserves, if any, and after we have made the required distributions to the holders of our outstanding preferred units. However, we do not have a legal or contractual obligation to pay distributions quarterly or on any other basis, at the applicable minimum quarterly distribution rate or at any other rate, and there is no guarantee that we will pay distributions to our unitholders in any quarter. Our minimum quarterly distribution provides the common unitholders a specified priority right to distributions over the subordinated unitholders. The board of directors of our general partner may change the foregoing distribution policy at any time and from time to time.

We intend to finance our future acquisitions and working-interest capital needs with cash generated from operations, borrowings from our credit facility, and proceeds from any future issuances of equity and debt. Replacement capital expenditures are expenditures necessary to replace our existing oil and natural gas reserves or otherwise maintain our asset base over the long-term. Like a number of other master limited partnerships, we are required by our partnership agreement to retain cash from our operations in an amount equal to our estimated replacement capital requirements. The board of directors of our general partner established a replacement capital expenditure estimate of $15.0 million for the period of April 1, 2016 to March 31, 2017.

Cash Flows

The following table shows our cash flows for the periods presented: 

	Nine Months Ended September 30,
	2016			2015
	(Unaudited) (In thousands)
Cash flows provided by operating activities	$	141,559		$	217,165
Cash flows used in investing activities	(203,760		)	(104,222		)
Cash flows provided by (used in) financing activities	53,816			(122,176		)

Nine Months Ended September 30, 2016 Compared to Nine Months Ended September 30, 2015

Operating Activities. Our operating cash flows are dependent, in large part, on our production, realized commodity prices, derivative settlements, lease bonus revenue, and operating expenses. Our cash flows from operations decreased from $217.2 million for the nine months ended September 30, 2015 to $141.6 million for the nine months ended September 30, 2016. The decrease was primarily due to lower cash collections of $58.5 million related to lower oil and natural gas sales and changes in working capital as compared to the corresponding period in 2015.

Investing Activities. Net cash used in investing activities increased by $99.5 million in the first nine months of 2016 as compared to the corresponding period in 2015 due to four mineral and property acquisitions that were closed during the first nine months of 2016 and higher capital expenditures for our working interest properties.

Financing Activities. For thenine months ended September 30, 2016we generated cash from financing activities as weincreased our borrowings under our credit facility andlowered distributions as compared to the corresponding period in 2015. Financing activities were further impacted by the repurchase of common and subordinated units.

29

Capital Expenditures

At the beginning of each calendar year, we establish a capital budget and then monitor it throughout the year. Our capital budget is created based upon our estimate of internally-generated cash flows and the ability to borrow and raise additional capital. Actual capital expenditure levels will vary, in part, based on actual cash generated, the economics of wells proposed by our operators for our participation, and the successful closing of acquisitions. The timing, size, and nature of acquisitions are unpredictable.

Our 2016 drilling expenditures are expected to be between $70.0 million and $75.0 million. We expect to invest between $65.0 million and $70.0 million in the Haynesville/Bossier play with the remainder expected to be spent primarily in the Bakken/Three Forks and Wolfcamp plays. During the nine months ended September 30, 2016, we spent $50.4 million related to drilling and completion costs and $1.1 million related to prospect leasehold acreage, primarily in the aforementioned plays. We also spent $140.9 million related to four mineral acquisitions in the current period as well as a final holdback payment from an acquisition in 2015. See Note 4 – Acquisitions for further discussion.

Credit Facility

On January 23, 2015, we amended and restated our $1.0 billion senior secured revolving credit agreement. Under this third amended and restated credit facility, the commitment of the lenders equals the lesser of the aggregate maximum credit amounts of the lenders and the borrowing base, which is determined based on the lenders’ estimated value of our oil and natural gas properties. On October 28, 2015, the third amended and restated credit facility was further amended to extend the term of the agreement from February 3, 2017 to February 4, 2019. Borrowings under the third amended and restated credit facility may be used for the acquisition of properties, cash distributions, and other general corporate purposes.  Our regular, semi-annual borrowing base redetermination process resulted in a decrease of the borrowing base from $550.0 million to $450.0 million, effective April 15, 2016. The Partnership's fall 2016 borrowing base redetermination process resulted in an increase in the borrowing base from $450.0 million to $500.0 million, which became effective October 31, 2016. As of September 30, 2015, we had outstanding borrowings of $299.0 million at a weighted-average interest rate of 2.53%.

The borrowing base under the third amended and restated credit agreement is redetermined semi-annually, typically on or around April 1 and October 1 of each year, by the administrative agent, taking into consideration the estimated loan value of our oil and gas properties consistent with the administrative agent’s normal oil and gas lending criteria. The administrative agent’s proposed redetermined borrowing base must be approved by all lenders to increase our existing borrowing base, and by two-thirds of the lenders to maintain or decrease our existing borrowing base. In addition, we and the lenders (at the election of two-thirds of the lenders) each have discretion to have the borrowing base redetermined once in between scheduled redeterminations,.

Outstanding borrowings under the third amended and restated credit facility bear interest at a floating rate elected by us equal to an alternative base rate (which is equal to the greatest of the Prime rate, the Federal Funds effective rate plus 0.50%, or 1-month LIBOR plus 1.00%) or LIBOR, in each case, plus the applicable margin. Throughout 2016, the applicable margin ranged from 0.50% to 1.50% in the case of the alternative base rate and from 1.50% to 2.50% in the case of LIBOR, in each case depending on the amount of borrowings outstanding in relation to the borrowing base. Subsequent to the closing of our fall redetermination, the applicable margin ranges from 1.00% to 2.00% in the case of the alternative base rate and from 2.00% to 3.00 % in the case of LIBOR, depending on the borrowings outstanding in relation to the borrowing base.

We are obligated to pay a quarterly commitment fee ranging from a 0.375% to 0.500% annualized rate on the unused portion of the borrowing base, depending on the amount of the borrowings outstanding in relation to the borrowing base. Principal may be optionally repaid from time to time without premium or penalty, other than customary LIBOR breakage, and is required to be paid (a) if the amount outstanding exceeds the borrowing base, whether due to a borrowing base redetermination or otherwise, in some cases subject to a cure period, or (b) at the maturity date. The third amended and restated credit facility is secured by liens on substantially all of our producing properties.

The third amended and restated credit agreement contains various affirmative, negative, and financial maintenance covenants. These covenants, among other things, limit additional indebtedness, additional liens, sales of assets, mergers and consolidations, dividends and distributions, transactions with affiliates, and entering into certain swap agreements, as well as require the maintenance of certain financial ratios. The third amended and restated credit agreement contains two financial covenants: total debt to EBITDAX of 3.5:1.0 or less; and a modified current ratio of 1.0:1.0 or greater. Distributions are not permitted if there is a default under the third amended and restated credit agreement (including due to a failure to satisfy one of the financial covenants) or during any time that our borrowing base is lower than the loans outstanding under the third amended and restated credit facility. The lenders have the right to accelerate all of the indebtedness under the third amended and restated

30

credit facility upon the occurrence and during the continuance of any event of default, and the third amended and restated credit agreement contains customary events of default, including non-payment, breach of covenants, materially incorrect representations, cross-default, bankruptcy, and change of control. There are no cure periods for events of default due to non-payment of principal and breaches of negative and financial covenants, but non-payment of interest and breaches of certain affirmative covenants are subject to customary cure periods. As of September 30, 2016, we were in compliance with all debt covenants.

Contractual Obligations

As of September 30, 2016, there have been no material changes to our contractual obligations previously disclosed in our 2015 Annual Report on Form 10-K.

Off-Balance Sheet Arrangements

As of September 30, 2016, we did not have any material off-balance sheet arrangements.

Critical Accounting Policies and Related Estimates

As of September 30, 2016, there have been no significant changes to our critical accounting policies and related estimates previously disclosed in our 2015 Annual Report on Form 10-K.

New and Revised Financial Accounting Standards

The effects of new accounting pronouncements are discussed in the notes to our unaudited consolidated financial statements included elsewhere in this Quarterly Report on Form 10-Q.

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Item 3. Quantitative and Qualitative Disclosures about Market Risk 

Commodity Price Risk

Our major market risk exposure is the pricing of oil, natural gas, and natural gas liquids produced by our operators. Realized prices are primarily driven by the prevailing global prices for oil and prices for natural gas and NGLs in the United States. Prices for oil, natural gas, and natural gas liquids have been volatile for several years, and we expect this unpredictability to continue in the future. The prices that our operators receive for production depend on many factors outside of our or their control. To reduce the impact of fluctuations in oil and natural gas prices on our revenues, we use commodity derivative instruments to reduce our exposure to price volatility of oil and natural gas. The counterparties to the contracts are unrelated third parties. The contracts settle monthly in cash based on a designated floating price. The designated floating price is based on the NYMEX benchmark for oil and natural gas. We have not designated any of our contracts as fair value or cash flow hedges. Accordingly, the changes in fair value of the contracts are included in net income in the period of the change. See Note 5 – Derivatives and Financial Instruments and Note 6 – Fair Value Measurement to the unaudited consolidated financial statements included elsewhere in this Quarterly Report on Form 10-Q for additional information.

Commodity prices have declined in recent years. To estimate the effect lower prices would have on our reserves, we applied a 10% discount to the SEC commodity pricing for the twelve months ended September 30, 2016. Applying this discount results in an approximate 3.0% reduction of proved reserve volumes as compared to the undiscounted September 30, 2016 SEC pricing scenario.

Counterparty and Customer Credit Risk

Our derivative contracts expose us to credit risk in the event of nonperformance by counterparties. While we do not require our counterparties to our derivative contracts to post collateral, we do evaluate the credit standing of such counterparties as we deem appropriate. This evaluation includes reviewing a counterparty’s credit rating and latest financial information. As of September 30, 2016, we had ten counterparties, all of which are rated Baa2 or better by Moody’s. Six of our counterparties are lenders under our credit facility.

Our principal exposure to credit risk results from receivables generated by the production activities of our operators. The inability or failure of our significant operators to meet their obligations to us or their insolvency or liquidation may adversely affect our financial results. However, we believe the credit risk associated with our operators and customers is acceptable.

Interest Rate Risk

We have exposure to changes in interest rates on our indebtedness. As of September 30, 2016, we had $299.0 million of outstanding borrowings under our credit facility, bearing interest at a weighted-average interest rate of 2.53%. The impact of a 1% increase in the interest rate on this amount of debt would have resulted in an increase in interest expense, and a corresponding decrease in our results of operations, of $2.2 million for the nine months ended September 30, 2016, assuming that our indebtedness remained constant throughout the period. We may use certain derivative instruments to hedge our exposure to variable interest rates in the future, but we do not currently have any interest rate hedges in place.

Item 4. Controls and Procedures

Disclosure Controls and Procedures

As required by Rule 13a-15(b) under the Securities Exchange Act of 1934 (the “Exchange Act”), we have evaluated, under the supervision and with the participation of management of our general partner, including our general partner’s principal executive officer and principal financial officer, the effectiveness of the design and operation of our disclosure controls and procedures (as defined in Rules 13a-15(e) and 15d-15(e) under the Exchange Act) as of the end of the period covered by this Quarterly Report on Form 10-Q. Our disclosure controls and procedures are designed to provide reasonable assurance that the information required to be disclosed by us in reports that we file or submit under the Exchange Act is accumulated and communicated to management, including our general partner’s principal executive officer and principal financial officer, as appropriate, to allow timely decisions regarding required disclosure and is recorded, processed, summarized and reported within the time periods specified in the rules and forms of the SEC. Based upon that evaluation, our general partner’s principal executive officer and principal financial officer concluded that our disclosure controls and procedures were effective as of September 30, 2016.

32

Changes in Internal Control over Financial Reporting

There were no changes in our internal control over financial reporting during the quarter ended September 30, 2016 that materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.

PART II – OTHER INFORMATION

Item 1. Legal Proceedings

Due to the nature of our business, we are, from time to time, involved in routine litigation or subject to disputes or claims related to our business activities. In the opinion of our management, none of the pending litigation, disputes or claims against us, if decided adversely, will have a material adverse effect on our financial condition, cash flows or results of operations.

Item 1A. Risk Factors

In addition to the other information set forth in this report, readers should carefully consider the risks under the heading “Risk Factors” in our 2015 Annual Report on Form 10-K. There has been no material change in our risk factors from those described in our 2015 Annual Report on Form 10-K. These risks are not the only risks that we face. Additional risks and uncertainties not currently known to us or that we currently deem to be immaterial may materially adversely affect our business, financial condition or results of operations.

Item 2.         Unregistered Sales of Equity Securities and Use of Proceeds

None.

Item 6. Exhibits

The information required by this Item 6 is set forth in the Index to Exhibits accompanying this Quarterly Report on Form 10-Q and is incorporated herein by reference.

33

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

	BLACK STONE MINERALS, L.P.
	By:	Black Stone Minerals GP, L.L.C., its general partner
Date: November 8, 2016	By:	/s/ Thomas L. Carter, Jr.
		Thomas L. Carter, Jr.
		President and Chief Executive Officer
		(Principal Executive Officer)
Date: November 8, 2016	By:	/s/ Marc Carroll
		Marc Carroll
		Senior Vice President and Chief Financial Officer
		(Principal Financial Officer)

34

Exhibit Index

Exhibit Number	Description
3.1	Certificate of Limited Partnership of Black Stone Minerals, L.P. (incorporated herein by reference to Exhibit 3.1 to Black Stone Minerals, L.P.’s Registration Statement on Form S-1 filed on March 19, 2015 (SEC File No. 333-202875)).
3.2	Certificate of Amendment to Certificate of Limited Partnership of Black Stone Minerals, L.P. (incorporated herein by reference to Exhibit 3.2 to Black Stone Minerals, L.P.’s Registration Statement on Form S-1 filed on March 19, 2015 (SEC File No. 333-202875)).
3.3	First Amended and Restated Agreement of Limited Partnership of Black Stone Minerals, L.P., dated May 6, 2015, by and among Black Stone Minerals GP, L.L.C. and Black Stone Minerals Company, L.P., as amended (incorporated herein by reference to Exhibit 3.2 of Black Stone Minerals, L.P.’s Current Report on Form 8-K filed on April 19, 2016 (SEC File No. 001-37362)).
3.4	Amendment No. 1 to First Amended and Restated Agreement of Limited Partnership of Black Stone Minerals, L.P., dated as of April 15, 2016 (incorporated herein by reference to Exhibit 3.1 of Black Stone Minerals, L.P.’s Current Report on Form 8-K filed on April 19, 2016 (SEC File No. 001-37362)).
*31.1	Certification of Chief Executive Officer of Black Stone Minerals, L.P. pursuant to Section 302 of the Sarbanes-Oxley Act of 2002
*31.2	Certification of Chief Financial Officer of Black Stone Minerals, L.P. pursuant to Section 302 of the Sarbanes-Oxley Act of 2002
*32.1	Certification of Chief Executive Officer and Chief Financial Officer of Black Stone Minerals, L.P. pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002
*101.INS	XBRL Instance Document
*101.SCH	XBRL Schema Document
*101.CAL	XBRL Calculation Linkbase Document
*101.LAB	XBRL Label Linkbase Document
*101.PRE	XBRL Presentation Linkbase Document
*101.DEF	XBRL Definition Linkbase Document

*      Filed or furnished herewith.

35

EX-31.1

Exhibit 31.1

Certification of Chief Executive Officer

pursuant to Rule 13a-14(a) and Rule 15d-14(a)

of the Securities Exchange Act OF 1934, as amended

I, Thomas L. Carter, Jr., certify that:

1. I have reviewed this report on Form 10-Q of Black Stone Minerals, L.P. (the “registrant”);

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officers and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) for the registrant and have:

a. Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b. Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

c. Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officers and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

a. All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b. Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: November 8, 2016	/s/ Thomas L. Carter, Jr.
	Thomas L. Carter, Jr.
	President and Chief Executive Officer
	Black Stone Minerals GP, L.L.C., the general partner of Black Stone Minerals, L.P.

EX-31.2

Exhibit 31.2

Certification of Chief Financial Officer

pursuant to Rule 13a-14(a) and Rule 15d-14(a)

of the Securities Exchange Act OF 1934, as amended

I, Marc Carroll, certify that:

1. I have reviewed this report on Form 10-Q of Black Stone Minerals, L.P. (the “registrant”);

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officers and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) for the registrant and have:

a. Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b. Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

c. Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officers and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

a. All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b. Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: November 8, 2016	/s/ Marc Carroll
	Marc Carroll
	Senior Vice President and Chief Financial Officer
	Black Stone Minerals GP, L.L.C., the general partner of Black Stone Minerals, L.P.

EX-32.1

Exhibit 32.1

Certification of

Chief Executive Officer and Chief Financial Officer

under Section 906 of the

Sarbanes Oxley Act of 2002, 18 U.S.C. § 1350

In connection with the report on Form 10-Q of Black Stone Minerals, L.P. (the “Partnership”), as filed with the Securities and Exchange Commission on the date hereof (the “Report”), Thomas L. Carter, Jr., Chief Executive Officer of the Partnership, and Marc Carroll, Chief Financial Officer of the Partnership, each certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that, to his knowledge:

(1) the Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended; and

(2) the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Partnership.

Date: November 8, 2016	/s/ Thomas L. Carter, Jr.
	Thomas L. Carter, Jr. President and Chief Executive Officer Black Stone Minerals GP, L.L.C., the general partner of Black Stone Minerals, L.P.
Date: November 8, 2016	/s/ Marc Carroll
	Marc Carroll Senior Vice President and Chief Financial Officer Black Stone Minerals GP, L.L.C., the general partner of Black Stone Minerals, L.P.

XML

Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2016	Nov. 03, 2016
Document Information [Line Items]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 30, 2016
Document Fiscal Year Focus	2016
Document Fiscal Period Focus	Q3
Trading Symbol	BSM
Entity Registrant Name	Black Stone Minerals, L.P.
Entity Central Index Key	0001621434
Current Fiscal Year End Date	--12-31
Entity Filer Category	Non-accelerated Filer
Common Units
Document Information [Line Items]
Entity Partnership Units Outstanding		95,736,113
Subordinated Units
Document Information [Line Items]
Entity Partnership Units Outstanding		95,189,076
Preferred Units
Document Information [Line Items]
Entity Partnership Units Outstanding		52,691

XML

CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
CURRENT ASSETS:
Cash and cash equivalents	$ 4,848	$ 13,233
Accounts receivable	64,391	41,246
Commodity derivative assets	13,285	48,260
Prepaid expenses and other current assets	1,718	856
TOTAL CURRENT ASSETS	84,242	103,595
PROPERTY AND EQUIPMENT
Oil and natural gas properties, at cost, using the successful efforts method of accounting, includes unproved properties of $620,502 and $524,563 at September 30, 2016 and December 31, 2015, respectively	2,680,570	2,482,211
Accumulated depreciation, depletion, amortization, and impairment	(1,630,119)	(1,543,796)
Oil and natural gas properties, net	1,050,451	938,415
Other property and equipment, net of accumulated depreciation of $14,706 and $14,660 at September 30, 2016 and December 31, 2015, respectively	137	179
NET PROPERTY AND EQUIPMENT	1,050,588	938,594
Deferred charges and other long-term assets	2,402	19,247
TOTAL ASSETS	1,137,232	1,061,436
CURRENT LIABILITIES:
Accounts payable	4,833	5,036
Accrued liabilities	39,394	58,003
Commodity derivative liabilities	137	0
TOTAL CURRENT LIABILITIES	44,364	63,039
LONG-TERM LIABILITIES:
Credit facility	299,000	66,000
Accrued incentive compensation	6,300	7,902
Commodity derivative liabilities	152	0
Deferred revenue	3,082	3,257
Asset retirement obligations	11,366	10,585
TOTAL LIABILITIES	364,264	150,783
COMMITMENTS AND CONTINGENCIES (Note 8)
MEZZANINE EQUITY:
Partners' equity - convertible redeemable preferred units, 53 and 77 units outstanding at September 30, 2016 and December 31, 2015, respectively	54,015	79,162
EQUITY:
Partners' equity - general partner interest	0	0
Noncontrolling interests	1,046	1,144
TOTAL EQUITY	718,953	831,491
TOTAL LIABILITIES, MEZZANINE EQUITY AND EQUITY	1,137,232	1,061,436
Common Units
EQUITY:
Partners' equity - units	510,913	574,648
Subordinated Units
EQUITY:
Partners' equity - units	$ 206,994	$ 255,699

XML

CONSOLIDATED BALANCE SHEETS (Unaudited) (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Oil and natural gas properties, unproved property costs	$ 620,502	$ 524,563
Other property and equipment accumulated depreciation and amortization	$ 14,706	$ 14,660
Preferred Units
Partners' equity, preferred units, outstanding (in units)	52,691	77,216
Common Units
Partners' equity - units, outstanding (in units)	95,733,000	96,162,000
Subordinated Units
Partners' equity - units, outstanding (in units)	95,189,000	95,057,000

XML

CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
REVENUE:
Oil and condensate sales	$ 42,780	$ 44,128	$ 104,581	$ 126,584
Natural gas and natural gas liquids sales	38,986	32,191	85,706	92,799
Gain (loss) on commodity derivative instruments	7,813	56,430	(12,295)	57,450
Lease bonus and other income	9,592	4,271	26,129	16,051
TOTAL REVENUE	99,171	137,020	204,121	292,884
OPERATING (INCOME) EXPENSE:
Lease operating expense	5,007	4,924	14,179	16,540
Production costs and ad valorem taxes	9,228	8,175	23,301	26,250
Exploration expense	6	1,817	643	2,014
Depreciation, depletion, and amortization	28,731	23,288	79,654	83,414
Impairment of oil and natural gas properties	0	24,854	6,775	156,683
General and administrative	16,677	18,994	52,213	53,530
Accretion of asset retirement obligations	206	265	680	805
(Gain) loss on sale of assets, net	0	4	(4,772)	(20)
TOTAL OPERATING EXPENSE	59,855	82,321	172,673	339,216
INCOME (LOSS) FROM OPERATIONS	39,316	54,699	31,448	(46,332)
OTHER INCOME (EXPENSE)
Interest and investment income	460	18	651	46
Interest expense	(2,282)	(870)	(4,773)	(5,530)
Other income	41	45	148	241
TOTAL OTHER EXPENSE	(1,781)	(807)	(3,974)	(5,243)
NET INCOME (LOSS)	37,535	53,892	27,474	(51,575)
NET (INCOME) LOSS ATTRIBUTABLE TO NONCONTROLLING INTERESTS SUBSEQUENT TO INITIAL PUBLIC OFFERING	8	(3)	15	137
DISTRIBUTIONS ON REDEEMABLE PREFERRED UNITS SUBSEQUENT TO INITIAL PUBLIC OFFERING	(1,324)	(2,973)	(4,439)	(4,783)
NET INCOME (LOSS) ATTRIBUTABLE TO THE GENERAL PARTNER AND COMMON AND SUBORDINATED UNITS SUBSEQUENT TO INITIAL PUBLIC OFFERING	36,219	50,916	23,050	(56,671)
ALLOCATION OF NET INCOME (LOSS) SUBSEQUENT TO INITIAL PUBLIC OFFERING ATTRIBUTABLE TO:
General partner interest	0	0	0	0
NET INCOME (LOSS) ATTRIBUTABLE TO THE GENERAL PARTNER AND COMMON AND SUBORDINATED UNITS SUBSEQUENT TO INITIAL PUBLIC OFFERING	36,219	50,916	23,050	(56,671)
Predecessor
OTHER INCOME (EXPENSE)
NET INCOME (LOSS)	0	0	0	(450)
Common Units
ALLOCATION OF NET INCOME (LOSS) SUBSEQUENT TO INITIAL PUBLIC OFFERING ATTRIBUTABLE TO:
Allocation of net loss	$ 23,114	$ 25,608	$ 24,343	$ (28,502)
NET INCOME (LOSS) ATTRIBUTABLE TO LIMITED PARTNERS PER COMMON AND SUBORDINATED UNIT:
Per unit (basic) (in dollars per unit)	$ 0.24	$ 0.27	$ 0.26	$ (0.30)
Weighted average units outstanding (basic) (in units)	95,740	96,186	95,086	96,183
Per unit (diluted) (in dollars per unit)	$ 0.24	$ 0.27	$ 0.26	$ (0.30)
Weighted average units outstanding (diluted) (in units)	96,011	96,186	95,619	96,183
DISTRIBUTIONS DECLARED AND PAID SUBSEQUENT TO INITIAL PUBLIC OFFERING:
Per unit (in dollars per unit)	$ 0.2875	$ 0.1615	$ 0.8125	$ 0.1615
Subordinated Units
ALLOCATION OF NET INCOME (LOSS) SUBSEQUENT TO INITIAL PUBLIC OFFERING ATTRIBUTABLE TO:
Allocation of net loss	$ 13,105	$ 25,308	$ (1,293)	$ (28,169)
NET INCOME (LOSS) ATTRIBUTABLE TO LIMITED PARTNERS PER COMMON AND SUBORDINATED UNIT:
Per unit (basic) (in dollars per unit)	$ 0.14	$ 0.27	$ (0.01)	$ (0.30)
Weighted average units outstanding (basic) (in units)	95,189	95,057	95,125	95,057
Per unit (diluted) (in dollars per unit)	$ 0.14	$ 0.27	$ (0.01)	$ (0.30)
Weighted average units outstanding (diluted) (in units)	95,189	95,057	95,467	95,057
DISTRIBUTIONS DECLARED AND PAID SUBSEQUENT TO INITIAL PUBLIC OFFERING:
Per unit (in dollars per unit)	$ 0.18375	$ 0.1615	$ 0.55125	$ 0.1615

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CONSOLIDATED STATEMENTS OF EQUITY (Unaudited) - 9 months ended Sep. 30, 2016 - USD ($) shares in Thousands, $ in Thousands	Total	Noncontrolling Interests	Common Units	Subordinated Units	Partners Equity Common Units	Partners Equity Subordinated Units
Beginning balance at Dec. 31, 2015	$ 831,491	$ 1,144			$ 574,648	$ 255,699
Beginning balance, units at Dec. 31, 2015			96,162	95,057
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Restricted units granted, net of forfeitures			702	(109)
Equity-based compensation	14,487				12,703	1,784
Conversion of redeemable preferred units	6,064				2,625	3,439
Conversion of redeemable preferred units, units			184	241
Repurchases of common units	(24,696)				(24,696)	0
Repurchases of common units, units			(1,315)	0
Distributions	(130,966)	(83)			(78,248)	(52,635)
Charges to partners' equity for accrued distribution equivalent rights	(462)				(462)
Net income (loss)	27,474	(15)			26,562	927
Distributions on redeemable preferred units	(4,439)				(2,219)	(2,220)
Ending balance at Sep. 30, 2016	$ 718,953	$ 1,046			$ 510,913	$ 206,994
Ending balance, units at Sep. 30, 2016			95,733	95,189

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CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income (loss)	$ 27,474	$ (51,575)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation, depletion, and amortization	79,654	83,414
Impairment of oil and natural gas properties	6,775	156,683
Accretion of asset retirement obligations	680	805
Amortization of deferred charges	594	724
(Gain) loss on commodity derivative instruments	12,295	(57,450)
Net cash received on settlement of commodity derivative instruments	39,220	46,532
Equity-based compensation	33,120	13,052
Gain on sale of assets, net	(4,772)	(20)
Changes in operating assets and liabilities:
Accounts receivable	(23,144)	22,485
Prepaid expenses and other current assets	(862)	(453)
Accounts payable and accrued liabilities	(29,063)	3,674
Deferred revenue	(175)	(584)
Settlement of asset retirement obligations	(237)	(122)
NET CASH PROVIDED BY OPERATING ACTIVITIES	141,559	217,165
CASH FLOWS FROM INVESTING ACTIVITIES:
Additions to oil and natural gas properties	(63,039)	(42,401)
Purchase of other property and equipment	(5)	(96)
Proceeds from the sale of oil and natural gas properties	177	432
Acquisitions of oil and natural gas properties	(140,893)	(62,157)
NET CASH USED IN INVESTING ACTIVITIES	(203,760)	(104,222)
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from issuance of common units of Black Stone Minerals, L.P., net of offering costs	0	399,087
Payments for capitalized offering costs	0	0
Borrowings under senior line of credit	304,500	172,600
Repayments of borrowings under senior line of credit	(71,500)	(523,600)
Distributions to noncontrolling interests	(83)	(167)
Redemptions of redeemable preferred units	(18,461)	0
Repurchases of common and subordinated units	(24,696)	(3,015)
Net Cash Provided by (Used in) Financing Activities	53,816	(122,176)
NET CHANGE IN CASH AND CASH EQUIVALENTS	(8,385)	(9,233)
CASH AND CASH EQUIVALENTS - beginning of the period	13,233	14,803
CASH AND CASH EQUIVALENTS - end of the period	4,848	5,570
SUPPLEMENTAL DISCLOSURE
Interest paid	4,060	4,794
Predecessor
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income (loss)	0	(450)
CASH FLOWS FROM FINANCING ACTIVITIES:
Distributions to unitholders	0	(126,383)
Common and Subordinated Units
CASH FLOWS FROM FINANCING ACTIVITIES:
Distributions to unitholders	(130,883)	(30,886)
Preferred Units
CASH FLOWS FROM FINANCING ACTIVITIES:
Distributions to unitholders	$ (5,061)	$ (9,812)

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Business and Basis of Presentation

9 Months Ended

Sep. 30, 2016

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Business and Basis of Presentation

BUSINESS AND BASIS OF PRESENTATION

Description of the business: Black Stone Minerals, L.P. (“BSM” or the “Partnership”) is a publicly traded Delaware limited partnership formed on September 16, 2014. On May 6, 2015, BSM completed its initial public offering (the “IPO”) of 22,500,000 common units representing limited partner interests at a price to the public of $19.00 per common unit. BSM received proceeds of $391.5 million from the sale of its common units, net of underwriting discount, structuring fee, and offering expenses (including costs previously incurred and capitalized). BSM used the net proceeds from the IPO to repay substantially all indebtedness outstanding under its credit facility. On May 1, 2015, BSM’s common units began trading on the New York Stock Exchange under the symbol “BSM.”

Black Stone Minerals Company, L.P., a Delaware limited partnership, and its subsidiaries (collectively referred to as “BSMC” or the “Predecessor”) own oil and natural gas mineral interests in the United States. In connection with the IPO, BSMC was merged into a wholly owned subsidiary of BSM, with BSMC as the surviving entity. Pursuant to the merger, the Class A and Class B common units representing limited partner interests of the Predecessor were converted into an aggregate of 72,574,715 common units and 95,057,312 subordinated units of BSM at a conversion ratio of 12.9465:1 for 0.4329 common units and 0.5671 subordinated units, and the preferred units of BSMC were converted into an aggregate of 117,963 preferred units of BSM at a conversion ratio of one to one. The merger was accounted for as a combination of entities under common control with assets and liabilities transferred at their carrying amounts in a manner similar to a pooling of interests. Unless otherwise stated or the context otherwise indicates, all references to the “Partnership” or similar expressions for time periods prior to the IPO refer to Black Stone Minerals Company, L.P. and its subsidiaries, the Predecessor, for accounting purposes. For time periods subsequent to the IPO, these terms refer to Black Stone Minerals, L.P. and its subsidiaries.

In addition to mineral interests, which make up the vast majority of the asset base, the Partnership’s assets also include nonparticipating and overriding royalty interests. These interests, which are substantially non-cost-bearing, are collectively referred to as “mineral and royalty interests.” As of September 30, 2016, the Partnership’s mineral and royalty interests were located in most of the major onshore oil and natural gas producing basins spread across 41 states and 61 onshore oil and natural gas producing basins of the continental United States. The Partnership also owns non-operated working interests in certain oil and natural gas properties.

Basis of presentation: The accompanying unaudited interim consolidated financial statements of the Partnership have been prepared in accordance with generally accepted accounting principles (“GAAP”) in the United States and pursuant to the rules and regulations of the U.S. Securities and Exchange Commission (“SEC”). These unaudited interim consolidated financial statements have been prepared in accordance with the instructions to Form 10-Q and, therefore, do not include all disclosures required for financial statements prepared in conformity with U.S. GAAP. Accordingly, the accompanying unaudited interim consolidated financial statements and related notes should be read in conjunction with the Partnership’s consolidated financial statements for the years ended December 31, 2015, 2014, and 2013 included in the Partnership’s 2015 Annual Report on Form 10-K. The financial statements include the consolidated results of the Partnership. All intercompany balances and transactions have been eliminated.

Certain reclassifications have been made to the prior periods presented to conform to the current period financial statement presentation. The reclassifications have no effect on the consolidated financial position, results of operations, or cash flows of the Partnership. In the opinion of management, all material adjustments, which are of a normal and recurring nature, necessary for a fair presentation of the results for the periods presented have been reflected. The results of operations for the three months and nine months ended September 30, 2016 are not necessarily indicative of the results to be expected for the full year.

The Partnership evaluates the significant terms of its investments to determine the method of accounting to be applied to each respective investment. Investments in which the Partnership has less than a 20% ownership interest and does not have control or exercise significant influence are accounted for under the cost method. The Partnership’s cost method investment is included in deferred charges and other long-term assets in the consolidated balance sheets. Investments in which the Partnership exercises control are consolidated, and the noncontrolling interests of such investments, which are not attributable directly or indirectly to the Partnership, are presented as a separate component of net income and equity in the accompanying consolidated financial statements.

The consolidated financial statements include undivided interests in oil and natural gas property rights. The Partnership accounts for its share of oil and natural gas property rights by reporting its proportionate share of assets, liabilities, revenues, costs, and cash flows within the relevant lines on the accompanying consolidated balance sheets, statements of operations, and statements of cash flows.

Segment reporting: The Partnership operates in a single operating and reportable segment. Operating segments are defined as components of an enterprise for which separate financial information is evaluated regularly by the chief operating decision maker in deciding how to allocate resources and assess performance. The Partnership’s chief executive officer has been determined to be the chief operating decision maker and allocates resources and assesses performance based upon financial information at the consolidated level.

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Summary of Significant Accounting Policies

9 Months Ended

Sep. 30, 2016

Accounting Policies [Abstract]

Summary of Significant Accounting Policies

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

Significant accounting policies: Our significant accounting policies are disclosed in the Partnership’s Annual Report on Form 10-K for the year ended December 31, 2015. There have been no changes in such policies or the application of such policies during the nine months ended September 30, 2016.

New accounting pronouncements: In May 2014, the Financial Accounting Standards Board (the “FASB”) issued an accounting standards update on a comprehensive new revenue recognition standard that will supersede Accounting Standards Codification (“ASC”) 605, Revenue Recognition. The new accounting guidance creates a framework under which an entity will allocate the transaction price to separate performance obligations and recognize revenue when each performance obligation is satisfied. Under the new standard, entities will be required to use judgment and make estimates, including identifying performance obligations in a contract, estimating the amount of variable consideration to include in the transaction price, allocating the transaction price to each separate performance obligation, and determining when an entity satisfies its performance obligations. The standard allows for either “full retrospective” adoption, meaning the standard is applied to all of the periods presented with a cumulative catch-up as of the earliest period presented, or “modified retrospective” adoption, meaning the standard is applied only to the most current period presented in the financial statements with a cumulative catch-up as of the current period. In July 2015, the FASB decided to defer the original effective date by one year to be effective for annual reporting periods beginning after December 15, 2017 instead of December 15, 2016 for public entities. The Partnership is evaluating the impact that the new accounting guidance will have on its consolidated financial statements and related disclosures and has not yet determined the method by which it will adopt the standard.

In February 2016, the FASB issued Accounting Standard Update (“ASU”) No. 2016-02, Leases (Topic 842), which requires lessees to recognize the lease assets and lease liabilities classified as operating leases on the balance sheet. The amendment will be effective for reporting periods beginning on or after December 15, 2018, and early adoption is permitted. The Partnership is evaluating the impact that the new accounting guidance will have on its consolidated financial statements and related disclosures.

In March 2016, the FASB issued ASU No. 2016-09, Compensation – Stock Compensation (Topic 718): Improvements to employee share-based payment accounting, which includes provisions intended to simplify various aspects related to how share-based compensation payments are accounted for and presented in the financial statements. This amendment will be effective prospectively for reporting periods beginning on or after December 15, 2016, and early adoption is permitted. The Partnership is evaluating the impact that the new accounting guidance will have on its consolidated financial statements and related disclosures.

In August 2016, the FASB issued ASU 2016-15, Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments, to address diversity in practice of how certain cash receipts and cash payments are currently presented and classified in the statement of cash flows. The ASU addresses the topic of separately identifiable cash flows and application of the predominance principle. Classification of cash receipts and payments that have aspects of more than one class of cash flows should be determined first by applying specific guidance, and then by the nature of each separately identifiable cash flow. In situations where there is an absence of specific guidance and the cash flow has aspects of more than one type of classification, the predominance principle should be applied whereby the cash flow classification should depend on the activity that is likely to be the predominant source or use of cash flows. The amendments in this ASU are effective for public business entities for fiscal years beginning after December 15, 2017 and interim periods within those fiscal years. Early adoption is permitted. The Partnership is evaluating the impact that the new accounting guidance will have on its consolidated financial statements and related disclosures

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Asset Retirement Obligations

9 Months Ended

Sep. 30, 2016

Asset Retirement Obligation Disclosure [Abstract]

Asset Retirement Obligations

ASSET RETIREMENT OBLIGATIONS

The asset retirement obligation (“ARO”) liability reflects the present value of estimated costs of dismantlement, removal, site reclamation, and similar activities associated with the Partnership’s working-interest oil and natural gas properties. The Partnership utilizes current retirement costs to estimate the expected cash outflows for retirement obligations. The Partnership estimates the ultimate productive life of its properties, a credit-adjusted risk-free rate, and an inflation factor in order to determine the current present value of this obligation. To the extent future revisions to these assumptions impact the present value of the existing ARO liability, a corresponding adjustment is made to the oil and natural gas property balance. The following table describes changes to the Partnership’s ARO liability during the period:

	For the nine months ended
	September 30, 2016
	(In thousands)
Beginning asset retirement obligations	$	10,585
Liabilities incurred	202
Liabilities settled	(237		)
Accretion expense	680
Revisions	136
Ending asset retirement obligations	$	11,366

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Acquisitions

9 Months Ended

Sep. 30, 2016

Business Combinations [Abstract]

Acquisitions

ACQUISITIONS

Acquisitions of proved oil and natural gas properties and working interests are considered business combinations and are recorded at their estimated fair value as of the acquisition date. Acquisitions of unproved oil and natural gas properties are considered asset acquisitions and are recorded at cost.

On January 8, 2016, the Partnership acquired mineral and royalty interests in the Permian Basin for $10.0 million in cash.

On June 15, 2016, the Partnership acquired an oil and natural gas mineral asset package primarily located in Weld County, Colorado for $34.0 million in cash. The following table summarizes the fair values assigned to the properties acquired:

	(In thousands)
Proved oil and natural gas properties	$	18,948
Unproved oil and natural gas properties	14,082
Net working capital	1,038
Asset retirement obligations	(50		)
Total fair value	$	34,018

On June 17, 2016, the Partnership acquired a diverse oil and natural gas mineral package from Freeport-McMoRan Oil and Gas, Inc. for $87.6 million in cash. The following table summarizes the fair values assigned to the properties acquired:

	(In thousands)
Proved oil and natural gas properties	$	20,787
Unproved oil and natural gas properties	65,745
Net working capital	1,026
Total fair value	$	87,558

On August 8, 2016, the Partnership acquired mineral interests located in Midland and Glasscock counties of Texas for $8.3 million in cash.

Throughout 2016, the Partnership funded certain other oil and natural gas asset acquisitions for an aggregate amount of $1.0 million in cash.

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Derivatives and Financial Instruments

9 Months Ended

Sep. 30, 2016

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Derivatives and Financial Instruments

DERIVATIVES AND FINANCIAL INSTRUMENTS

The Partnership’s ongoing operations expose it to changes in the market price for oil and natural gas. To mitigate the inherent commodity price risk associated with its operations, the Partnership uses oil and natural gas derivative instruments. From time to time, such instruments may include fixed-price-swap contracts, fixed price contracts, costless collars, and other contractual arrangements. The Partnership enters into oil and natural gas derivative instrument contracts that contain netting arrangements with each counterparty. The Partnership does not enter into derivative instruments for speculative purposes.

As of September 30, 2016, the Partnership’s open derivative contracts consisted of only fixed-price-swap contracts. A fixed-price-swap contract between the Partnership and the counterparty specifies a fixed commodity price and a future settlement date. The Partnership will receive from, or pay to, the counterparty the difference between the fixed-swap price and the market price on the settlement date. We have not designated any of our contracts as fair value or cash flow hedges. Accordingly, the changes in fair value of the contracts are included in the consolidated statement of operations in the period of the change. All derivative gains and losses from our derivative contracts have been recognized in “Revenue” on our consolidated statements of operations. All derivative instruments that have not yet been settled in cash are reflected as either derivative assets or liabilities in the Partnership’s accompanying consolidated balance sheets as of September 30, 2016 and December 31, 2015. See Note 6 – Fair Value Measurement for further discussion.

The table below summarizes the fair value and classification of the Partnership’s derivative instruments:

As of September 30, 2016
Classification	Balance Sheet Location	Gross Fair Value		Effect of Counterparty Netting			Net Carrying Value on Balance Sheet
				(In thousands)
Assets:
Current asset	Commodity derivative assets	$	15,269	$	(1,984	)	$	13,285
Long-term asset	Deferred charges and other long-term assets	73		(50		)	23
Total assets		$	15,342	$	(2,034	)	$	13,308
Liabilities:
Current liability	Commodity derivative liabilities	$	2,121	$	(1,984	)	$	137
Long-term liability	Commodity derivative liabilities	202		(50		)	152
Total liabilities		$	2,323	$	(2,034	)	$	289

As of December 31, 2015
Classification	Balance Sheet Location	Gross Fair Value		Effect of Counterparty Netting		Net Carrying Value on Balance Sheet
				(In thousands)
Assets:
Current asset	Commodity derivative assets	$	48,260	$	—	$	48,260
Long-term asset	Deferred charges and other long-term assets	16,274		—		16,274
Total assets		$	64,534	$	—	$	64,534
Liabilities:
Current liability	Commodity derivative liabilities	$	—	$	—	$	—
Long-term liability	Commodity derivative liabilities	—		—		—
Total liabilities		$	—	$	—	$	—

Changes in the fair values of the Partnership’s derivative instruments (both assets and liabilities) are presented on a net basis in the accompanying consolidated statements of operations. Changes in the fair value of the Partnership’s commodity derivative instruments (both assets and liabilities) are as follows:

	For the Nine Months Ended September 30,
Derivatives not designated as hedging instruments	2016			2015
	(In thousands)
Beginning fair value of commodity derivative instruments	$	64,534		$	37,471
Gain (loss) on oil derivative instruments	(8,906		)	37,305
Gain (loss) on natural gas derivative instruments	(3,389		)	20,145
Net cash received on settlements of oil derivative    instruments	(23,034		)	(32,274		)
Net cash received on settlements of natural gas    derivative instruments	(16,186		)	(14,258		)
Net change in fair value of commodity derivative    instruments	(51,515		)	10,918
Ending fair value of commodity derivative instruments	$	13,019		$	48,389

The Partnership had the following open derivative contracts for oil as of September 30, 2016:

				Range (Per Bbl)
Period and Type of Contract	Volume (Bbl)	Weighted Average (Per Bbl)		Low		High
Oil Swap Contracts:
2016
Third Quarter	190,000	$	54.32	$	35.74	$	62.53
Fourth Quarter	598,000	54.68		36.31		63.07
2017
First Quarter	364,000	$	62.69	$	52.73	$	63.65
Second Quarter	339,000	54.00		53.49		54.38

The Partnership had the following open derivative contracts for natural gas as of September 30, 2016:

				Range (Per MMBtu)
Period and Type of Contract	Volume (MMBtu)	Weighted Average (Per MMBtu)		Low		High
Natural Gas Swap Contracts:
2016
Fourth Quarter	8,820,000	$	3.11	$	2.29	$	3.41
2017
First Quarter	8,040,000	$	3.42	$	3.08	$	3.52
Second Quarter	7,550,000	3.10		2.85		3.18
Third Quarter	6,820,000	2.97		2.90		3.12
Fourth Quarter	6,170,000	3.08		2.92		3.29

The Partnership entered into the following derivative contracts for oil subsequent to September 30, 2016:

	Volume (Bbl)	Weighted Average (Per Bbl)		Range (Per Bbl)
Period and Type of Contract				Low		High
Oil Swap Contracts:
2017
First Quarter	30,000	$	50.77	$	50.34	$	51.20
Second Quarter	66,000	51.69		51.45		51.96
Third Quarter	396,000	52.63		52.04		53.24
Fourth Quarter	396,000	53.12		52.57		53.67

The Partnership entered into the following derivative contracts for natural gas subsequent to September 30, 2016:

	Volume (MMBtu)	Weighted Average (Per MMBtu)		Range (Per MMBtu)
Period and Type of Contract				Low		High
Natural Gas Swap Contracts:
2016
Fourth Quarter	540,000	$	3.02	$	2.89	$	3.15
2017
First Quarter	810,000	$	3.27	$	3.23	$	3.32
Second Quarter	750,000	2.98		2.96		3.00
Third Quarter	910,000	3.03		3.01		3.10
Fourth Quarter	870,000	3.11		3.03		3.28

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Fair Value Measurement

9 Months Ended

Sep. 30, 2016

Fair Value Disclosures [Abstract]

Fair Value Measurement

FAIR VALUE MEASUREMENT

Fair value is defined as the amount at which an asset (or liability) could be bought (or incurred) or sold (or settled) in an orderly transaction between market participants at the measurement date. Further, ASC 820 establishes a framework for measuring fair value, establishes a fair value hierarchy based on the quality of inputs used to measure fair value, and includes certain disclosure requirements. Fair value estimates are based on either (i) actual market data or (ii) assumptions that other market participants would use in pricing an asset or liability, including estimates of risk.

ASC 820 establishes a three-level valuation hierarchy for disclosure of fair value measurements. The valuation hierarchy categorizes assets and liabilities measured at fair value into one of three different levels depending on the observability of the inputs employed in the measurement. The three levels are defined as follows:

Level 1—Unadjusted quoted prices for identical assets or liabilities in active markets.

Level 2—Quoted prices for similar assets or liabilities in non-active markets, and inputs that are observable for the asset or liability, either directly or indirectly, for substantially the full termof the financial instrument.

Level 3—Inputs that are unobservable and significant to the fair value measurement (including the Partnership’s own assumptions in determining fair value).

A financial instrument’s categorization within the valuation hierarchy is based upon the lowest level of input that is significant to the fair value measurement. The Partnership’s assessment of the significance of a particular input to the fair value measurement in its entirety requires judgment and considers factors specific to the asset or liability. There were no transfers into, or out of, the three levels of the fair value hierarchy for the nine months ended September 30, 2016 or the year ended December 31, 2015.

The carrying value of our cash and cash equivalents, receivables and payables approximate fair value due to the short-term nature of the instruments. The estimated carrying value of all debt as of September 30, 2016 and December 31, 2015 approximated the fair value due to variable market rates of interest. These debt fair values, which are Level 3 measurements, were estimated based on the Partnership’s incremental borrowing rates for similar types of borrowing arrangements, when quoted market prices were not available. The estimated fair values of the Partnership’s financial instruments are not necessarily indicative of the amounts that would be realized in a current market exchange.

Assets and Liabilities Measured at Fair Value on a Recurring Basis

The Partnership estimated the fair value of derivative instruments using the market approach via a model that uses inputs that are observable in the market or can be derived from, or corroborated by, observable data. See Note 5 – Derivatives and Financial Instruments for further discussion.

The following table presents information about the Partnership’s assets and liabilities measured at fair value on a recurring basis: 

	Fair Value Measurements Using						Effect of Counterparty Netting
	Level 1		Level 2		Level 3					Total
	(In thousands)
As of September 30, 2016
Financial Assets
Commodity derivative instruments	$	—	$	15,342	$	—	$	(2,034	)	$	13,308
Financial Liabilities
Commodity derivative instruments	—		2,323		—		(2,034		)	289
As of December 31, 2015
Financial Assets
Commodity derivative instruments	$	—	$	64,534	$	—	$	—		$	64,534
Financial Liabilities
Commodity derivative instruments	—		—		—		—			—

Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis

Nonfinancial assets and liabilities measured at fair value on a nonrecurring basis include certain nonfinancial assets and liabilities as may be acquired in a business combination and measurements of oil and natural gas property values for assessment of impairment.

The determination of the fair values of proved and unproved properties acquired in business combinations are estimated by discounting the projected cash flows from the acquired assets at market based rates of return. The factors used to determine fair value include estimates of economic reserves, future operating and development costs, future commodity prices, and a risk-adjusted discount rate. The Partnership has designated these measurements as Level 3. The Partnership’s fair value assessments for recent acquisitions are included in Note 4 – Acquisitions.

Oil and natural gas properties are measured at fair value on a nonrecurring basis using the income approach when assessing for impairment. Proved and unproved oil and natural gas properties are reviewed for impairment when events and circumstances indicate a possible decline in the recoverability of the carrying value of those properties. When assessing producing properties for impairment, the Partnership compares the expected undiscounted projected future cash flows of the producing properties to the carrying amount of the producing properties to determine recoverability. When the carrying amount exceeds its estimated undiscounted future cash flows, the carrying amount is written down to its fair value, which is measured as the present value of the projected future cash flows of such properties. The factors used to determine fair value include estimates of economic reserves, future operating and development costs, future commodity prices, and a risk-adjusted discount rate.

The Partnership’s estimates of fair value have been determined at discrete points in time based on relevant market data. These estimates involve uncertainty and cannot be determined with precision. There were no significant changes in valuation techniques or related inputs as of September 30, 2016 or December 31, 2015.

The following table presents information about the Partnership’s assets measured at fair value on a nonrecurring basis:

	Fair Value Measurements Using						Net Book Value1
	Level 1		Level 2		Level 3				Impairment
	(In thousands)
Three months ended September 30, 2016
Impaired oil and natural gas properties	$	—	$	—	$	—	$	—	$	—
Three months ended September 30, 2015
Impaired oil and natural gas properties	$	—	$	—	$	37,959	$	62,813	$	24,854
Nine months ended September 30, 2016
Impaired oil and natural gas properties	$	—	$	—	$	3,042	$	9,817	$	6,775
Nine months ended September 30, 2015
Impaired oil and natural gas properties	$	—	$	—	$	127,630	$	284,313	$	156,683

¹ Amount represents net book value at the date of assessment.

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Credit Facility

9 Months Ended

Sep. 30, 2016

Debt Disclosure [Abstract]

Credit Facility

CREDIT FACILITY

The Partnership maintains a senior secured revolving credit agreement (the “Senior Line of Credit”). The Senior Line of Credit has a maximum credit amount of $1.0 billion. On October 28, 2015, the Senior Line of Credit was amended to extend the term of the agreement from February 3, 2017 to February 4, 2019. The amount of the borrowing base is derived from the value of the Partnership’s oil and natural gas properties as determined by the lender syndicate using pricing assumptions that often differ from the current market for future prices. The Partnership’s semi-annual borrowing base redetermination process resulted in a decrease of the borrowing base from $550.0 million to $450.0 million, effective April 15, 2016. The Partnership's fall 2016 borrowing base redetermination process resulted in an increase in the borrowing base from $450.0 million to $500.0 million, which became effective October 31, 2016. Drawings on the Senior Line of Credit are used for the acquisition of oil and natural gas properties and for other general business purposes.

Throughout 2016, borrowings under the Senior Line of Credit bore interest at LIBOR plus a margin between 1.50% and 2.50%, or the Prime rate plus a margin between 0.50% and 1.50%, with the margin depending on the borrowing base utilization percentage of the loan. The prime rate is determined to be the higher of the financial institution’s prime rate or the federal funds effective rate plus 0.50% per annum.

Effective October 31, 2016, borrowings under the Senior Line of Credit bore interest at LIBOR plus a margin between 2.00% and 3.00%, or the Prime rate plus a margin between 1.00% and 2.00%, with the margin depending on the borrowing base utilization of the loan.

The weighted-average interest rate of the Senior Line of Credit was 2.53% and 1.92% as of September 30, 2016 and December 31, 2015, respectively. Accrued interest is payable at the end of each calendar quarter or at the end of each interest period, unless the interest period is longer than 90 days in which case interest is payable at the end of every 90-day period. In addition, a commitment fee is payable at the end of each calendar quarter based on either a rate of 0.375% if the borrowing base utilization percentage is less than 50%, or 0.500% per annum if the borrowing base utilization percentage is equal to or greater than 50%. The Senior Line of Credit is secured by substantially all of the Partnership’s producing oil and natural gas assets.

The Senior Line of Credit contains various limitations on future borrowings, leases, hedging, and sales of assets. Additionally, the Senior Line of Credit requires the Partnership to maintain a current ratio of not less than 1.0:1.0 and a ratio of total debt to EBITDAX (Earnings before Interest, Taxes, Depreciation, Amortization, and Exploration) of not more than 3.5:1.0. As of September 30, 2016, the Partnership was in compliance with all financial covenants for the Senior Line of Credit.

The aggregate principal balance outstanding was $299.0 million and $66.0 million at September 30, 2016 and December 31, 2015, respectively. The unused portion of the available borrowings under the Senior Line of Credit was $151.0 million and $484.0 million at September 30, 2016 and December 31, 2015, respectively.

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Commitments and Contingencies

9 Months Ended

Sep. 30, 2016

Commitments and Contingencies Disclosure [Abstract]

Commitments and Contingencies

COMMITMENTS AND CONTINGENCIES

Environmental Matters

The Partnership’s business includes activities that are subject to U.S. federal, state, and local environmental regulations with regard to air, land, and water quality and other environmental matters.

The Partnership does not consider the potential remediation costs that could result from issues identified in any environmental site assessments to be significant to the consolidated financial statements and no provision for potential remediation costs has been made.

Litigation

From time to time, the Partnership is involved in legal actions and claims arising in the ordinary course of business. The Partnership believes existing claims as of September 30, 2016 will be resolved without material adverse effect on the Partnership’s financial condition or operations.

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Incentive Compensation

9 Months Ended

Sep. 30, 2016

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Incentive Compensation

INCENTIVE COMPENSATION

On January 12, 2016, each non-employee director on the Board of Directors of the Partnership’s general partner (the “Board”) was granted 12,368 fully vested common units for service during 2015. On February 19, 2016, the Compensation Committee of the Board approved a grant of awards to each of the Partnership’s executive officers and certain other employees. These awards consisted of restricted common units and restricted performance units (in the form of phantom units) with distribution equivalent rights. The grants included 717,654 restricted common units subject to limitations on transferability, customary forfeiture provisions, and service-based graded vesting requirements through January 7, 2019. The holders of restricted common unit awards have all of the rights of a common unitholder, including non-forfeitable distribution rights with respect to their restricted common units. The grant-date fair value of these awards, net of estimated forfeitures, is recognized ratably using the straight-line attribution method. The Compensation Committee of the Board also approved a grant of 717,654 restricted performance units that are subject to both performance-based and service-based vesting provisions. The number of common units issued to a recipient upon vesting of a restricted performance unit will be calculated based on performance against certain metrics that relate to the Partnership’s average performance over each calendar year during the performance period commencing January 1, 2016. The target number of common units subject to each restricted performance unit is one; however, based on the achievement of performance criteria, the number of common units that may be received in settlement of each restricted performance unit can range from zero to two times the target number. The restricted performance units are eligible to become earned at the end of the performance period on December 31, 2018.  Compensation expense related to the restricted performance unit awards is determined by multiplying the number of common units underlying such awards that, based on the Partnership’s estimate, are likely to vest, by the grant-date fair value and recognized using the accelerated attribution method. Distribution equivalent rights for the restricted performance unit awards that are expected to vest are charged to partners’ capital. The Compensation Committee of the Board also approved the dollar-value targets for performance-based short-term incentive compensation for executive officers of the Partnership and certain other employees. The Partnership expects to ultimately settle the authorized awards at the end of the performance period in common units of the Partnership.

On April 25, 2016, the Compensation Committee of the Board approved a resolution to change the settlement feature of certain employee long-term incentive compensation plans from cash to equity. As a result of the modification, $10.1 million of cash-settled liabilities were reclassified to equity-settled liabilities during the second quarter of 2016 and the remaining unamortized expense of the awards will be amortized as equity-settled liabilities.

The table below summarizes incentive compensation expense recorded in general and administrative expenses in the consolidated statements of operations for the three months and nine months ended September 30, 2016 and 2015, respectively.

	Three Months Ended September 30,				Nine Months Ended September 30,
Incentive compensation expense	2016		2015		2016		2015
	(In thousands)				(In thousands)
Cash—long-term incentive plan	$	580	$	3,434	$	2,990	$	10,914
Equity-based compensation—restricted common and subordinated units	4,487		3,136		10,420		7,086
Equity-based compensation—restricted performance units	3,066		2,070		11,105		3,330
Board of Directors incentive plan	428		484		1,385		2,636
Total incentive compensation expense	$	8,561	$	9,124	$	25,900	$	23,966

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Redeemable Preferred Units

9 Months Ended

Sep. 30, 2016

Equity [Abstract]

Redeemable Preferred Units

REDEEMABLE PREFERRED UNITS

The Partnership had 52,691 and 77,216 preferred units outstanding with a carrying value of $54.0 million and $79.2 million as of September 30, 2016 and December 31, 2015, respectively. The aforementioned amounts included accrued distributions of $1.3 million and $1.9 million as of September 30, 2016 and December 31, 2015, respectively. The redeemable preferred units are classified as mezzanine equity on the consolidated balance sheets since redemption is outside the control of the Partnership. The preferred units are entitled to an annual distribution of 10% of the funded capital of the preferred units, payable on a quarterly basis in arrears.

The preferred units are convertible into common and subordinated units at any time at the option of the preferred unitholders. The preferred units have an adjusted conversion price of $14.2683 and an adjusted conversion rate of 30.3431 common units and 39.7427 subordinated units per preferred unit, which reflects the reverse split described in Note 1 – Business and Basis of Presentation and the capital restructuring related to the IPO. The preferred unitholders can elect to have the Partnership redeem, at face value, up to 28,266 preferred units as of December 31, 2017 and 24,425 preferred units as of December 31, 2018, plus any accrued and unpaid distributions. 

The Partnership shall have the right, at its sole option, to redeem an amount of preferred units equal to the units being redeemed by an owner of preferred units as of each December 31. Any amount of a given year’s preferred units eligible for redemption not redeemed as of December 31 shall automatically convert to common and subordinated units in the following year.

For the nine months ended September 30, 2016, 18,461 preferred units were redeemed for $19.0 million, including accrued unpaid yield. For the nine months ended September 30, 2016, 6,064 preferred units totaling $6.1 million were converted into 184,006 common units and 240,986 subordinated units as a result of the mandatory conversion subsequent to December 31, 2015. For the year ended December 31, 2015, 39,240 preferred units totaling $39.2 million were converted into the equivalent of 1,190,664 common units and 1,559,502 subordinated units on an adjusted basis.

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Earnings Per Unit

9 Months Ended

Sep. 30, 2016

Earnings Per Share [Abstract]

Earnings Per Unit

EARNINGS PER UNIT

The Partnership applies the two-class method for purposes of calculating earnings per unit (“EPU”). The holders of the Partnership’s restricted common and subordinated units have all the rights of a unitholder, including non-forfeitable distribution rights. As participating securities, the restricted common and subordinated units are included in the calculation of basic earnings per unit. For the periods presented, the amount of earnings allocated to these participating units was not material. Net income (loss) attributable to the Partnership is allocated to the Partnership’s general partner and the common and subordinated unitholders in proportion to their pro rata ownership after giving effect to distributions, if any, declared during the period. The redeemable preferred units could be converted into 1.6 million common units and 2.1 million subordinated units as of September 30, 2016. At September 30, 2016, if the redeemable preferred units were converted to common and subordinated units, the effect would be anti-dilutive. Therefore, the redeemable preferred units are not included in the diluted EPU calculation. The Partnership’s restricted performance unit awards are contingently issuable units that are considered in the calculation of diluted EPU. The Partnership assesses the number of units that would be issuable, if any, under the terms of the arrangement if the end of the reporting period were the end of the contingency period. For the nine months ended September 30, 2016, there were 271,256 common units related to the Partnership’s restricted performance unit awards included in the calculation of diluted EPU.

The following table sets forth the computation of basic and diluted earnings per common and subordinated unit:

	For the Three Months Ended September 30,						For the Nine Months Ended September 30,
	2016			2015			2016			2015
	(In thousands, except per unit  amounts)						(In thousands, except per unit  amounts)
NET INCOME (LOSS)	$	37,535		$	53,892		$	27,474		$	(51,575	)
NET (INCOME) LOSS ATTRIBUTABLE TO PREDECESSOR	—			—			—			(450		)
NET (INCOME) LOSS ATTRIBUTABLE TO NONCONTROLLING INTERESTS SUBSEQUENT TO INITIAL PUBLIC OFFERING	8			(3		)	15			137
DISTRIBUTIONS ON REDEEMABLE PREFERRED UNITS SUBSEQUENT TO INITIAL PUBLIC OFFERING	(1,324		)	(2,973		)	(4,439		)	(4,783		)
NET INCOME (LOSS) ATTRIBUTABLE TO THE GENERAL PARTNER AND COMMON AND SUBORDINATED UNITS SUBSEQUENT TO INITIAL PUBLIC OFFERING	$	36,219		$	50,916		$	23,050		$	(56,671	)
ALLOCATION OF NET INCOME (LOSS) SUBSEQUENT TO INITIAL PUBLIC OFFERING ATTRIBUTABLE TO:
General partner interest	$	—		$	—		$	—		$	—
Common units	23,114			25,608			24,343			(28,502		)
Subordinated units	13,105			25,308			(1,293		)	(28,169		)
	$	36,219		$	50,916		$	23,050		$	(56,671	)
NET INCOME (LOSS) ATTRIBUTABLE TO LIMITED PARTNERS PER COMMON AND SUBORDINATED UNIT:
Per common unit (basic)	$	0.24		$	0.27		$	0.26		$	(0.30	)
Weighted average common units outstanding (basic)	95,740			96,186			95,086			96,183
Per subordinated unit (basic)	$	0.14		$	0.27		$	(0.01	)	$	(0.30	)
Weighted average subordinated units outstanding (basic)	95,189			95,057			95,125			95,057
Per common unit (diluted)	$	0.24		$	0.27		$	0.26		$	(0.30	)
Weighted average common units outstanding (diluted)	96,011			96,186			95,619			96,183
Per subordinated unit (diluted)	$	0.14		$	0.27		$	(0.01	)	$	(0.30	)
Weighted average subordinated units outstanding (diluted)	95,189			95,057			95,467			95,057

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Subsequent Events

9 Months Ended

Sep. 30, 2016

Subsequent Events [Abstract]

Subsequent Events

SUBSEQUENT EVENTS                      

On October 5, 2016, Marc Carroll, Senior Vice President ("SVP") and Chief Financial Officer ("CFO"),  informed the Partnership that he will step down as CFO and SVP effective November 11, 2016. Mr. Carroll will enter into a consulting arrangement with the Partnership that will extend into 2017 to help ensure an orderly transition to his successor.

On October 24, 2016, the Partnership announced that it expects to appoint Jeffrey P. Wood as its SVP and CFO effective November 11, 2016. The Partnership expects that Mr. Wood will enter into a severance agreement with Black Stone Natural Resources Management Company, in a form substantially similar to that entered into by the General Partner’s other executive officers, that will provide for the payment of cash severance payments and benefits in the event Mr. Wood’s employment is terminated under certain circumstances, but he has not yet been entered into such agreement. The Partnership also expects that Mr. Wood will receive awards under the Partnership’s Long-Term Incentive Plan with terms substantially similar to the awards granted to the General Partner’s other executive officers, but it has not yet awarded him any grants under that plan.

As discussed in Note 7, the Partnership's fall 2016 borrowing base redetermination process resulted in an increase in the borrowing base from $450.0 million to $500.0 million with an effective date of October 31, 2016.

On November 7, 2016, the Board approved a distribution for the period June 30, 2016 to September 30, 2016 of $0.2875 per common unit and $0.18375 per subordinated unit. Distributions will be payable on November 25, 2016 to unitholders of record at the close of business on November 17, 2016.

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Summary of Significant Accounting Policies (Policies)

9 Months Ended

Sep. 30, 2016

Accounting Policies [Abstract]

Basis of Presentation

Basis of presentation: The accompanying unaudited interim consolidated financial statements of the Partnership have been prepared in accordance with generally accepted accounting principles (“GAAP”) in the United States and pursuant to the rules and regulations of the U.S. Securities and Exchange Commission (“SEC”). These unaudited interim consolidated financial statements have been prepared in accordance with the instructions to Form 10-Q and, therefore, do not include all disclosures required for financial statements prepared in conformity with U.S. GAAP. Accordingly, the accompanying unaudited interim consolidated financial statements and related notes should be read in conjunction with the Partnership’s consolidated financial statements for the years ended December 31, 2015, 2014, and 2013 included in the Partnership’s 2015 Annual Report on Form 10-K. The financial statements include the consolidated results of the Partnership. All intercompany balances and transactions have been eliminated.

Certain reclassifications have been made to the prior periods presented to conform to the current period financial statement presentation. The reclassifications have no effect on the consolidated financial position, results of operations, or cash flows of the Partnership. In the opinion of management, all material adjustments, which are of a normal and recurring nature, necessary for a fair presentation of the results for the periods presented have been reflected. The results of operations for the three months and nine months ended September 30, 2016 are not necessarily indicative of the results to be expected for the full year.

The Partnership evaluates the significant terms of its investments to determine the method of accounting to be applied to each respective investment. Investments in which the Partnership has less than a 20% ownership interest and does not have control or exercise significant influence are accounted for under the cost method. The Partnership’s cost method investment is included in deferred charges and other long-term assets in the consolidated balance sheets. Investments in which the Partnership exercises control are consolidated, and the noncontrolling interests of such investments, which are not attributable directly or indirectly to the Partnership, are presented as a separate component of net income and equity in the accompanying consolidated financial statements.

The consolidated financial statements include undivided interests in oil and natural gas property rights. The Partnership accounts for its share of oil and natural gas property rights by reporting its proportionate share of assets, liabilities, revenues, costs, and cash flows within the relevant lines on the accompanying consolidated balance sheets, statements of operations, and statements of cash flows.

Segment Reporting

Segment reporting: The Partnership operates in a single operating and reportable segment. Operating segments are defined as components of an enterprise for which separate financial information is evaluated regularly by the chief operating decision maker in deciding how to allocate resources and assess performance. The Partnership’s chief executive officer has been determined to be the chief operating decision maker and allocates resources and assesses performance based upon financial information at the consolidated level.

New Accounting Pronouncements

New accounting pronouncements: In May 2014, the Financial Accounting Standards Board (the “FASB”) issued an accounting standards update on a comprehensive new revenue recognition standard that will supersede Accounting Standards Codification (“ASC”) 605, Revenue Recognition. The new accounting guidance creates a framework under which an entity will allocate the transaction price to separate performance obligations and recognize revenue when each performance obligation is satisfied. Under the new standard, entities will be required to use judgment and make estimates, including identifying performance obligations in a contract, estimating the amount of variable consideration to include in the transaction price, allocating the transaction price to each separate performance obligation, and determining when an entity satisfies its performance obligations. The standard allows for either “full retrospective” adoption, meaning the standard is applied to all of the periods presented with a cumulative catch-up as of the earliest period presented, or “modified retrospective” adoption, meaning the standard is applied only to the most current period presented in the financial statements with a cumulative catch-up as of the current period. In July 2015, the FASB decided to defer the original effective date by one year to be effective for annual reporting periods beginning after December 15, 2017 instead of December 15, 2016 for public entities. The Partnership is evaluating the impact that the new accounting guidance will have on its consolidated financial statements and related disclosures and has not yet determined the method by which it will adopt the standard.

In February 2016, the FASB issued Accounting Standard Update (“ASU”) No. 2016-02, Leases (Topic 842), which requires lessees to recognize the lease assets and lease liabilities classified as operating leases on the balance sheet. The amendment will be effective for reporting periods beginning on or after December 15, 2018, and early adoption is permitted. The Partnership is evaluating the impact that the new accounting guidance will have on its consolidated financial statements and related disclosures.

In March 2016, the FASB issued ASU No. 2016-09, Compensation – Stock Compensation (Topic 718): Improvements to employee share-based payment accounting, which includes provisions intended to simplify various aspects related to how share-based compensation payments are accounted for and presented in the financial statements. This amendment will be effective prospectively for reporting periods beginning on or after December 15, 2016, and early adoption is permitted. The Partnership is evaluating the impact that the new accounting guidance will have on its consolidated financial statements and related disclosures.

In August 2016, the FASB issued ASU 2016-15, Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments, to address diversity in practice of how certain cash receipts and cash payments are currently presented and classified in the statement of cash flows. The ASU addresses the topic of separately identifiable cash flows and application of the predominance principle. Classification of cash receipts and payments that have aspects of more than one class of cash flows should be determined first by applying specific guidance, and then by the nature of each separately identifiable cash flow. In situations where there is an absence of specific guidance and the cash flow has aspects of more than one type of classification, the predominance principle should be applied whereby the cash flow classification should depend on the activity that is likely to be the predominant source or use of cash flows. The amendments in this ASU are effective for public business entities for fiscal years beginning after December 15, 2017 and interim periods within those fiscal years. Early adoption is permitted. The Partnership is evaluating the impact that the new accounting guidance will have on its consolidated financial statements and related disclosures

Acquisitions

Acquisitions of proved oil and natural gas properties and working interests are considered business combinations and are recorded at their estimated fair value as of the acquisition date. Acquisitions of unproved oil and natural gas properties are considered asset acquisitions and are recorded at cost.

Earnings Per Unit

The Partnership applies the two-class method for purposes of calculating earnings per unit (“EPU”). The holders of the Partnership’s restricted common and subordinated units have all the rights of a unitholder, including non-forfeitable distribution rights. As participating securities, the restricted common and subordinated units are included in the calculation of basic earnings per unit. For the periods presented, the amount of earnings allocated to these participating units was not material. Net income (loss) attributable to the Partnership is allocated to the Partnership’s general partner and the common and subordinated unitholders in proportion to their pro rata ownership after giving effect to distributions, if any, declared during the period.

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Asset Retirement Obligations (Tables)

9 Months Ended

Sep. 30, 2016

Asset Retirement Obligation Disclosure [Abstract]

Schedule of Change in Asset Retirement Obligation Liability

The following table describes changes to the Partnership’s ARO liability during the period:

	For the nine months ended
	September 30, 2016
	(In thousands)
Beginning asset retirement obligations	$	10,585
Liabilities incurred	202
Liabilities settled	(237		)
Accretion expense	680
Revisions	136
Ending asset retirement obligations	$	11,366

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Acquisitions (Tables)

9 Months Ended

Sep. 30, 2016

Weld County, Colorado

Business Acquisition [Line Items]

Schedule of Fair Values of the Properties Acquired

The following table summarizes the fair values assigned to the properties acquired:

	(In thousands)
Proved oil and natural gas properties	$	18,948
Unproved oil and natural gas properties	14,082
Net working capital	1,038
Asset retirement obligations	(50		)
Total fair value	$	34,018

Freeport-McMo Ran oil and Gas, Inc

Business Acquisition [Line Items]

Schedule of Fair Values of the Properties Acquired

The following table summarizes the fair values assigned to the properties acquired:

	(In thousands)
Proved oil and natural gas properties	$	20,787
Unproved oil and natural gas properties	65,745
Net working capital	1,026
Total fair value	$	87,558

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Derivatives and Financial Instruments (Tables)

9 Months Ended

Sep. 30, 2016

Derivative [Line Items]

Summary of Fair Value and Classification of Derivative Instruments

The table below summarizes the fair value and classification of the Partnership’s derivative instruments:

As of September 30, 2016
Classification	Balance Sheet Location	Gross Fair Value		Effect of Counterparty Netting			Net Carrying Value on Balance Sheet
				(In thousands)
Assets:
Current asset	Commodity derivative assets	$	15,269	$	(1,984	)	$	13,285
Long-term asset	Deferred charges and other long-term assets	73		(50		)	23
Total assets		$	15,342	$	(2,034	)	$	13,308
Liabilities:
Current liability	Commodity derivative liabilities	$	2,121	$	(1,984	)	$	137
Long-term liability	Commodity derivative liabilities	202		(50		)	152
Total liabilities		$	2,323	$	(2,034	)	$	289

As of December 31, 2015
Classification	Balance Sheet Location	Gross Fair Value		Effect of Counterparty Netting		Net Carrying Value on Balance Sheet
				(In thousands)
Assets:
Current asset	Commodity derivative assets	$	48,260	$	—	$	48,260
Long-term asset	Deferred charges and other long-term assets	16,274		—		16,274
Total assets		$	64,534	$	—	$	64,534
Liabilities:
Current liability	Commodity derivative liabilities	$	—	$	—	$	—
Long-term liability	Commodity derivative liabilities	—		—		—
Total liabilities		$	—	$	—	$	—

Changes in Fair Value of Company's Commodity Derivative Instruments

Changes in the fair value of the Partnership’s commodity derivative instruments (both assets and liabilities) are as follows:

	For the Nine Months Ended September 30,
Derivatives not designated as hedging instruments	2016			2015
	(In thousands)
Beginning fair value of commodity derivative instruments	$	64,534		$	37,471
Gain (loss) on oil derivative instruments	(8,906		)	37,305
Gain (loss) on natural gas derivative instruments	(3,389		)	20,145
Net cash received on settlements of oil derivative    instruments	(23,034		)	(32,274		)
Net cash received on settlements of natural gas    derivative instruments	(16,186		)	(14,258		)
Net change in fair value of commodity derivative    instruments	(51,515		)	10,918
Ending fair value of commodity derivative instruments	$	13,019		$	48,389

Oil and Natural Gas

Derivative [Line Items]

Summary of Open Derivative Contracts

The Partnership had the following open derivative contracts for oil as of September 30, 2016:

				Range (Per Bbl)
Period and Type of Contract	Volume (Bbl)	Weighted Average (Per Bbl)		Low		High
Oil Swap Contracts:
2016
Third Quarter	190,000	$	54.32	$	35.74	$	62.53
Fourth Quarter	598,000	54.68		36.31		63.07
2017
First Quarter	364,000	$	62.69	$	52.73	$	63.65
Second Quarter	339,000	54.00		53.49		54.38

The Partnership had the following open derivative contracts for natural gas as of September 30, 2016:

				Range (Per MMBtu)
Period and Type of Contract	Volume (MMBtu)	Weighted Average (Per MMBtu)		Low		High
Natural Gas Swap Contracts:
2016
Fourth Quarter	8,820,000	$	3.11	$	2.29	$	3.41
2017
First Quarter	8,040,000	$	3.42	$	3.08	$	3.52
Second Quarter	7,550,000	3.10		2.85		3.18
Third Quarter	6,820,000	2.97		2.90		3.12
Fourth Quarter	6,170,000	3.08		2.92		3.29

The Partnership entered into the following derivative contracts for oil subsequent to September 30, 2016:

	Volume (Bbl)	Weighted Average (Per Bbl)		Range (Per Bbl)
Period and Type of Contract				Low		High
Oil Swap Contracts:
2017
First Quarter	30,000	$	50.77	$	50.34	$	51.20
Second Quarter	66,000	51.69		51.45		51.96
Third Quarter	396,000	52.63		52.04		53.24
Fourth Quarter	396,000	53.12		52.57		53.67

The Partnership entered into the following derivative contracts for natural gas subsequent to September 30, 2016:

	Volume (MMBtu)	Weighted Average (Per MMBtu)		Range (Per MMBtu)
Period and Type of Contract				Low		High
Natural Gas Swap Contracts:
2016
Fourth Quarter	540,000	$	3.02	$	2.89	$	3.15
2017
First Quarter	810,000	$	3.27	$	3.23	$	3.32
Second Quarter	750,000	2.98		2.96		3.00
Third Quarter	910,000	3.03		3.01		3.10
Fourth Quarter	870,000	3.11		3.03		3.28

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Fair Value Measurement (Tables)

9 Months Ended

Sep. 30, 2016

Fair Value Disclosures [Abstract]

Schedule of Assets and Liabilities Measured at Fair Value on a Recurring Basis

The following table presents information about the Partnership’s assets and liabilities measured at fair value on a recurring basis: 

	Fair Value Measurements Using						Effect of Counterparty Netting
	Level 1		Level 2		Level 3					Total
	(In thousands)
As of September 30, 2016
Financial Assets
Commodity derivative instruments	$	—	$	15,342	$	—	$	(2,034	)	$	13,308
Financial Liabilities
Commodity derivative instruments	—		2,323		—		(2,034		)	289
As of December 31, 2015
Financial Assets
Commodity derivative instruments	$	—	$	64,534	$	—	$	—		$	64,534
Financial Liabilities
Commodity derivative instruments	—		—		—		—			—

Schedule of Assets Measured at Fair Value on a Nonrecurring Basis

The following table presents information about the Partnership’s assets measured at fair value on a nonrecurring basis:

	Fair Value Measurements Using						Net Book Value1
	Level 1		Level 2		Level 3				Impairment
	(In thousands)
Three months ended September 30, 2016
Impaired oil and natural gas properties	$	—	$	—	$	—	$	—	$	—
Three months ended September 30, 2015
Impaired oil and natural gas properties	$	—	$	—	$	37,959	$	62,813	$	24,854
Nine months ended September 30, 2016
Impaired oil and natural gas properties	$	—	$	—	$	3,042	$	9,817	$	6,775
Nine months ended September 30, 2015
Impaired oil and natural gas properties	$	—	$	—	$	127,630	$	284,313	$	156,683

¹ Amount represents net book value at the date of assessment.

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Incentive Compensation (Tables)

9 Months Ended

Sep. 30, 2016

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Summary of Incentive Compensation Expense

The table below summarizes incentive compensation expense recorded in general and administrative expenses in the consolidated statements of operations for the three months and nine months ended September 30, 2016 and 2015, respectively.

	Three Months Ended September 30,				Nine Months Ended September 30,
Incentive compensation expense	2016		2015		2016		2015
	(In thousands)				(In thousands)
Cash—long-term incentive plan	$	580	$	3,434	$	2,990	$	10,914
Equity-based compensation—restricted common and subordinated units	4,487		3,136		10,420		7,086
Equity-based compensation—restricted performance units	3,066		2,070		11,105		3,330
Board of Directors incentive plan	428		484		1,385		2,636
Total incentive compensation expense	$	8,561	$	9,124	$	25,900	$	23,966

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Earnings Per Unit (Tables)

9 Months Ended

Sep. 30, 2016

Earnings Per Share [Abstract]

Computation of Basic and Diluted Earnings per Common and Subordinated Unit

The following table sets forth the computation of basic and diluted earnings per common and subordinated unit:

	For the Three Months Ended September 30,						For the Nine Months Ended September 30,
	2016			2015			2016			2015
	(In thousands, except per unit  amounts)						(In thousands, except per unit  amounts)
NET INCOME (LOSS)	$	37,535		$	53,892		$	27,474		$	(51,575	)
NET (INCOME) LOSS ATTRIBUTABLE TO PREDECESSOR	—			—			—			(450		)
NET (INCOME) LOSS ATTRIBUTABLE TO NONCONTROLLING INTERESTS SUBSEQUENT TO INITIAL PUBLIC OFFERING	8			(3		)	15			137
DISTRIBUTIONS ON REDEEMABLE PREFERRED UNITS SUBSEQUENT TO INITIAL PUBLIC OFFERING	(1,324		)	(2,973		)	(4,439		)	(4,783		)
NET INCOME (LOSS) ATTRIBUTABLE TO THE GENERAL PARTNER AND COMMON AND SUBORDINATED UNITS SUBSEQUENT TO INITIAL PUBLIC OFFERING	$	36,219		$	50,916		$	23,050		$	(56,671	)
ALLOCATION OF NET INCOME (LOSS) SUBSEQUENT TO INITIAL PUBLIC OFFERING ATTRIBUTABLE TO:
General partner interest	$	—		$	—		$	—		$	—
Common units	23,114			25,608			24,343			(28,502		)
Subordinated units	13,105			25,308			(1,293		)	(28,169		)
	$	36,219		$	50,916		$	23,050		$	(56,671	)
NET INCOME (LOSS) ATTRIBUTABLE TO LIMITED PARTNERS PER COMMON AND SUBORDINATED UNIT:
Per common unit (basic)	$	0.24		$	0.27		$	0.26		$	(0.30	)
Weighted average common units outstanding (basic)	95,740			96,186			95,086			96,183
Per subordinated unit (basic)	$	0.14		$	0.27		$	(0.01	)	$	(0.30	)
Weighted average subordinated units outstanding (basic)	95,189			95,057			95,125			95,057
Per common unit (diluted)	$	0.24		$	0.27		$	0.26		$	(0.30	)
Weighted average common units outstanding (diluted)	96,011			96,186			95,619			96,183
Per subordinated unit (diluted)	$	0.14		$	0.27		$	(0.01	)	$	(0.30	)
Weighted average subordinated units outstanding (diluted)	95,189			95,057			95,467			95,057

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Business and Basis of Presentation - Additional Information (Details) $ / shares in Units, $ in Millions		9 Months Ended
	May 06, 2015 USD ($) $ / shares shares	Sep. 30, 2016 States Basins shares
U.S.
Limited Partners Capital Account [Line Items]
Number of states major onshore oil and natural gas basins located | States		41
Number of onshore oil and natural gas producing basins | Basins		61
Common Units
Limited Partners Capital Account [Line Items]
Units exchanged in merger	72,574,715
Capital units converted upon merger		184,000
Common Units | Predecessor
Limited Partners Capital Account [Line Items]
Units conversion ratio as part of merger	12.9465
Units conversion ratio split up as part of merger	0.4329
Common Units | IPO | Limited Partner
Limited Partners Capital Account [Line Items]
Issuance of common units for initial public offering, net of offering costs, units	22,500,000
Price per common unit (in dollars per unit) | $ / shares	$ 19
Proceeds from sale of common units, net of offering expenses and underwriting discounts and commissions | $	$ 391.5
Subordinated Units
Limited Partners Capital Account [Line Items]
Units exchanged in merger	95,057,312
Capital units converted upon merger		241,000
Subordinated Units | Predecessor
Limited Partners Capital Account [Line Items]
Units conversion ratio as part of merger	12.9465
Units conversion ratio split up as part of merger	0.5671
Preferred Units | Predecessor
Limited Partners Capital Account [Line Items]
Units conversion ratio as part of merger	1
Capital units converted upon merger	117,963

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Asset Retirement Obligations - Schedule of Change in Asset Retirement Obligation Liability (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]
Beginning asset retirement obligations			$ 10,585
Liabilities incurred			202
Liabilities settled			(237)
Accretion expense	$ 206	$ 265	680	$ 805
Revisions			136
Ending asset retirement obligations	$ 11,366		$ 11,366

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Acquisitions - Additional Information (Details) - USD ($) $ in Thousands						9 Months Ended
	Aug. 08, 2016	Jun. 17, 2016	Jun. 17, 2016	Jun. 15, 2016	Jan. 08, 2016	Sep. 30, 2016
Permian Basin
Business Acquisition [Line Items]
Purchase of mineral and royalty interest					$ 10,000
Weld County, Colorado
Business Acquisition [Line Items]
Purchase of mineral and royalty interest				$ 34,018
Freeport-McMo Ran oil and Gas, Inc
Business Acquisition [Line Items]
Purchase of mineral and royalty interest		$ 87,558	$ 87,600
Series of Individually Immaterial Business Acquisitions
Business Acquisition [Line Items]
Purchase of mineral and royalty interest	$ 8,300					$ 1,000

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Acquisitions - Schedule of Fair Values of the Properties Acquired (Details) - USD ($) $ in Thousands	Jun. 17, 2016	Jun. 17, 2016	Jun. 15, 2016
Weld County, Colorado
Business Acquisition [Line Items]
Proved oil and natural gas properties			$ 18,948
Unproved oil and natural gas properties			14,082
Net working capital			1,038
Asset retirement obligations			(50)
Total fair value			$ 34,018
Freeport-McMo Ran oil and Gas, Inc
Business Acquisition [Line Items]
Proved oil and natural gas properties	$ 20,787
Unproved oil and natural gas properties	65,745
Net working capital	1,026
Total fair value	$ 87,558	$ 87,600

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Derivatives and Financial Instruments - Summary of Fair Value and Classification of Derivative Instruments (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Derivatives Fair Value [Line Items]
Gross Fair Value, Assets	$ 15,342	$ 64,534
Effect of Counterparty Netting, Assets	(2,034)
Net Carrying Value on Balance Sheet, Assets	13,308	64,534
Gross Fair Value, Liabilities	2,323	0
Effect of Counterparty Netting, Liabilities	(2,034)	0
Net Carrying Value on Balance Sheet, Liabilities	289	0
Commodity Derivative Assets, Current
Derivatives Fair Value [Line Items]
Gross Fair Value, Assets	15,269	48,260
Effect of Counterparty Netting, Assets	(1,984)
Net Carrying Value on Balance Sheet, Assets	13,285	48,260
Deferred Charges and Other Long-term Assets
Derivatives Fair Value [Line Items]
Gross Fair Value, Assets	73	16,274
Effect of Counterparty Netting, Assets	(50)
Net Carrying Value on Balance Sheet, Assets	23	16,274
Commodity Derivative Liabilities, Current
Derivatives Fair Value [Line Items]
Gross Fair Value, Liabilities	2,121	0
Effect of Counterparty Netting, Liabilities	(1,984)	0
Net Carrying Value on Balance Sheet, Liabilities	137	0
Commodity Derivative Liabilities, Long-term
Derivatives Fair Value [Line Items]
Gross Fair Value, Liabilities	202	0
Effect of Counterparty Netting, Liabilities	(50)	0
Net Carrying Value on Balance Sheet, Liabilities	$ 152	$ 0

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Derivatives and Financial Instruments - Changes in Fair Value of Company's Commodity Derivative Instruments (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Derivatives not designated as hedging instruments
Gain (loss) on commodity derivative instruments	$ 7,813	$ 56,430	$ (12,295)	$ 57,450
Net cash received on settlements of derivative instruments			(39,220)	(46,532)
Not Designated as Hedging Instrument
Derivatives not designated as hedging instruments
Beginning fair value of commodity derivative instruments			64,534	37,471
Net change in fair value of commodity derivative instruments			(51,515)	10,918
Ending fair value of commodity derivative instruments	$ 13,019	$ 48,389	13,019	48,389
Oil | Not Designated as Hedging Instrument
Derivatives not designated as hedging instruments
Gain (loss) on commodity derivative instruments			(8,906)	37,305
Net cash received on settlements of derivative instruments			(23,034)	(32,274)
Natural Gas | Not Designated as Hedging Instrument
Derivatives not designated as hedging instruments
Gain (loss) on commodity derivative instruments			(3,389)	20,145
Net cash received on settlements of derivative instruments			$ (16,186)	$ (14,258)

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Derivatives and Financial Instruments - Summary of Open Derivative Contracts for Oil and Natural Gas (Details) - Not Designated as Hedging Instrument - Swap	1 Months Ended	9 Months Ended
	Nov. 08, 2016 MMBTU $ / MMBTU $ / bbl bbl	Sep. 30, 2016 MMBTU $ / MMBTU $ / bbl bbl
Oil | Swap Contract of Q3 2016
Derivative [Line Items]
Derivative Contract, Volume (in Bbl) | bbl		190,000
Derivative Contract, Weighted Average Price (in USD per Bbl or MMBtu) | $ / bbl		54.32
Derivative Contract, Price Range Low (in USD per Bbl or MMBtu) | $ / bbl		35.74
Derivative Contract, Price Range High (in USD per Bbl or MMBtu) | $ / bbl		62.53
Oil | Swap Contract of Q4 2016
Derivative [Line Items]
Derivative Contract, Volume (in Bbl) | bbl		598,000
Derivative Contract, Weighted Average Price (in USD per Bbl or MMBtu) | $ / bbl		54.68
Derivative Contract, Price Range Low (in USD per Bbl or MMBtu) | $ / bbl		36.31
Derivative Contract, Price Range High (in USD per Bbl or MMBtu) | $ / bbl		63.07
Oil | Swap Contract of Q1 2017
Derivative [Line Items]
Derivative Contract, Volume (in Bbl) | bbl		364,000
Derivative Contract, Weighted Average Price (in USD per Bbl or MMBtu) | $ / bbl		62.69
Derivative Contract, Price Range Low (in USD per Bbl or MMBtu) | $ / bbl		52.73
Derivative Contract, Price Range High (in USD per Bbl or MMBtu) | $ / bbl		63.65
Oil | Swap Contract of Q1 2017 | Subsequent Event
Derivative [Line Items]
Derivative Contract, Volume (in Bbl) | bbl	30,000
Derivative Contract, Weighted Average Price (in USD per Bbl or MMBtu) | $ / bbl	50.77
Derivative Contract, Price Range Low (in USD per Bbl or MMBtu) | $ / bbl	50.34
Derivative Contract, Price Range High (in USD per Bbl or MMBtu) | $ / bbl	51.20
Oil | Swap Contract of Q2 2017
Derivative [Line Items]
Derivative Contract, Volume (in Bbl) | bbl		339,000
Derivative Contract, Weighted Average Price (in USD per Bbl or MMBtu) | $ / bbl		54.00
Derivative Contract, Price Range Low (in USD per Bbl or MMBtu) | $ / bbl		53.49
Derivative Contract, Price Range High (in USD per Bbl or MMBtu) | $ / bbl		54.38
Oil | Swap Contract of Q2 2017 | Subsequent Event
Derivative [Line Items]
Derivative Contract, Volume (in Bbl) | bbl	66,000
Derivative Contract, Weighted Average Price (in USD per Bbl or MMBtu) | $ / bbl	51.69
Derivative Contract, Price Range Low (in USD per Bbl or MMBtu) | $ / bbl	51.45
Derivative Contract, Price Range High (in USD per Bbl or MMBtu) | $ / bbl	51.96
Oil | Swap Contract of Q3 2017 | Subsequent Event
Derivative [Line Items]
Derivative Contract, Volume (in Bbl) | bbl	396,000
Derivative Contract, Weighted Average Price (in USD per Bbl or MMBtu) | $ / bbl	52.63
Derivative Contract, Price Range Low (in USD per Bbl or MMBtu) | $ / bbl	52.04
Derivative Contract, Price Range High (in USD per Bbl or MMBtu) | $ / bbl	53.24
Oil | Swap Contract of Q4 2017 | Subsequent Event
Derivative [Line Items]
Derivative Contract, Volume (in Bbl) | bbl	396,000
Derivative Contract, Weighted Average Price (in USD per Bbl or MMBtu) | $ / bbl	53.12
Derivative Contract, Price Range Low (in USD per Bbl or MMBtu) | $ / bbl	52.57
Derivative Contract, Price Range High (in USD per Bbl or MMBtu) | $ / bbl	53.67
Natural Gas | Swap Contract of Q4 2016
Derivative [Line Items]
Derivative Contract, Volume (in MMBtu) | MMBTU		8,820,000
Derivative Contract, Weighted Average Price (in USD per Bbl or MMBtu)		3.11
Derivative Contract, Price Range Low (in USD per Bbl or MMBtu)		2.29
Derivative Contract, Price Range High (in USD per Bbl or MMBtu)		3.41
Natural Gas | Swap Contract of Q4 2016 | Subsequent Event
Derivative [Line Items]
Derivative Contract, Volume (in MMBtu) | MMBTU	540,000
Derivative Contract, Weighted Average Price (in USD per Bbl or MMBtu)	3.02
Derivative Contract, Price Range Low (in USD per Bbl or MMBtu)	2.89
Derivative Contract, Price Range High (in USD per Bbl or MMBtu)	3.15
Natural Gas | Swap Contract of Q1 2017
Derivative [Line Items]
Derivative Contract, Volume (in MMBtu) | MMBTU		8,040,000
Derivative Contract, Weighted Average Price (in USD per Bbl or MMBtu)		3.42
Derivative Contract, Price Range Low (in USD per Bbl or MMBtu)		3.08
Derivative Contract, Price Range High (in USD per Bbl or MMBtu)		3.52
Natural Gas | Swap Contract of Q1 2017 | Subsequent Event
Derivative [Line Items]
Derivative Contract, Volume (in MMBtu) | MMBTU	810,000
Derivative Contract, Weighted Average Price (in USD per Bbl or MMBtu)	3.27
Derivative Contract, Price Range Low (in USD per Bbl or MMBtu)	3.23
Derivative Contract, Price Range High (in USD per Bbl or MMBtu)	3.32
Natural Gas | Swap Contract of Q2 2017
Derivative [Line Items]
Derivative Contract, Volume (in MMBtu) | MMBTU		7,550,000
Derivative Contract, Weighted Average Price (in USD per Bbl or MMBtu)		3.10
Derivative Contract, Price Range Low (in USD per Bbl or MMBtu)		2.85
Derivative Contract, Price Range High (in USD per Bbl or MMBtu)		3.18
Natural Gas | Swap Contract of Q2 2017 | Subsequent Event
Derivative [Line Items]
Derivative Contract, Volume (in MMBtu) | MMBTU	750,000
Derivative Contract, Weighted Average Price (in USD per Bbl or MMBtu)	2.98
Derivative Contract, Price Range Low (in USD per Bbl or MMBtu)	2.96
Derivative Contract, Price Range High (in USD per Bbl or MMBtu)	3.00
Natural Gas | Swap Contract of Q3 2017
Derivative [Line Items]
Derivative Contract, Volume (in MMBtu) | MMBTU		6,820,000
Derivative Contract, Weighted Average Price (in USD per Bbl or MMBtu)		2.97
Derivative Contract, Price Range Low (in USD per Bbl or MMBtu)		2.90
Derivative Contract, Price Range High (in USD per Bbl or MMBtu)		3.12
Natural Gas | Swap Contract of Q3 2017 | Subsequent Event
Derivative [Line Items]
Derivative Contract, Volume (in MMBtu) | MMBTU	910,000
Derivative Contract, Weighted Average Price (in USD per Bbl or MMBtu)	3.03
Derivative Contract, Price Range Low (in USD per Bbl or MMBtu)	3.01
Derivative Contract, Price Range High (in USD per Bbl or MMBtu)	3.10
Natural Gas | Swap Contract of Q4 2017
Derivative [Line Items]
Derivative Contract, Volume (in MMBtu) | MMBTU		6,170,000
Derivative Contract, Weighted Average Price (in USD per Bbl or MMBtu)		3.08
Derivative Contract, Price Range Low (in USD per Bbl or MMBtu)		2.92
Derivative Contract, Price Range High (in USD per Bbl or MMBtu)		3.29
Natural Gas | Swap Contract of Q4 2017 | Subsequent Event
Derivative [Line Items]
Derivative Contract, Volume (in MMBtu) | MMBTU	870,000
Derivative Contract, Weighted Average Price (in USD per Bbl or MMBtu)	3.11
Derivative Contract, Price Range Low (in USD per Bbl or MMBtu)	3.03
Derivative Contract, Price Range High (in USD per Bbl or MMBtu)	3.28

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Fair Value Measurement - Additional Information (Details) - USD ($)	9 Months Ended	12 Months Ended
	Sep. 30, 2016	Dec. 31, 2015
Fair Value Disclosures [Abstract]
Fair value, assets transfer between the three fair value hierarchy levels	$ 0	$ 0
Fair value, liabilities transfer between the three fair value hierarchy levels	$ 0	$ 0

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Fair Value Measurement - Schedule of Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Gross Fair Value, Assets	$ 15,342	$ 64,534
Effect of Counterparty Netting, Assets	(2,034)
Net Carrying Value on Balance Sheet, Assets	13,308	64,534
Gross Fair Value, Liabilities	2,323	0
Effect of Counterparty Netting, Liabilities	(2,034)	0
Net Carrying Value on Balance Sheet, Liabilities	289	0
Commodity Derivative Instruments | Fair Value Measurements, Recurring Basis
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Effect of Counterparty Netting, Assets	(2,034)	0
Net Carrying Value on Balance Sheet, Assets	13,308	64,534
Effect of Counterparty Netting, Liabilities	(2,034)	0
Net Carrying Value on Balance Sheet, Liabilities	289	0
Commodity Derivative Instruments | Fair Value Measurements, Recurring Basis | Level 2
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Gross Fair Value, Assets	15,342	64,534
Gross Fair Value, Liabilities	$ 2,323	$ 0

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Fair Value Measurement - Schedule of Assets Measured at Fair Value on a Nonrecurring Basis (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Impaired oil and natural gas properties, Impairment	$ 0	$ 24,854	$ 6,775	$ 156,683
Fair Value Measurements, Nonrecurring Basis
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Impaired oil and natural gas properties, Net Book Value	0	62,813	9,817	284,313
Impaired oil and natural gas properties, Impairment	0	24,854	6,775	156,683
Fair Value Measurements, Nonrecurring Basis | Level 3
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Impaired oil and natural gas properties, Fair Value Measurements	$ 0	$ 37,959	$ 3,042	$ 127,630

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Credit Facility - Additional Information (Details)		9 Months Ended
	Oct. 31, 2016 USD ($)	Sep. 30, 2016 USD ($)	Apr. 15, 2016 USD ($)	Apr. 14, 2016 USD ($)	Dec. 31, 2015 USD ($)
Line Of Credit Facility [Line Items]
Credit facility		$ 299,000,000			$ 66,000,000
Senior Line of Credit | Revolving Credit Facility
Line Of Credit Facility [Line Items]
Maximum borrowing capacity		1,000,000,000
Borrowing base		$ 450,000,000	$ 450,000,000	$ 550,000,000
Weighted average interest rate (percent)		2.53%			1.92%
Borrowing base threshold (percent)		50.00%
Credit facility		$ 299,000,000			$ 66,000,000
Unused portion of current borrowing base		$ 151,000,000			$ 484,000,000
Senior Line of Credit | Revolving Credit Facility | Subsequent Event
Line Of Credit Facility [Line Items]
Borrowing base	$ 500,000,000
Senior Line of Credit | Revolving Credit Facility | Federal funds effective rate
Line Of Credit Facility [Line Items]
Interest rate (percent)		0.50%
Senior Line of Credit | Revolving Credit Facility | Borrowing Base Utilization Percentage Less Than 50%
Line Of Credit Facility [Line Items]
Commitment fee payable rate (percent)		0.375%
Senior Line of Credit | Revolving Credit Facility | Borrowing Base Utilization Percentage Equal to or Greater Than 50%
Line Of Credit Facility [Line Items]
Commitment fee payable rate (percent)		0.50%
Senior Line of Credit | Revolving Credit Facility | Minimum
Line Of Credit Facility [Line Items]
Current ratio		1
Senior Line of Credit | Revolving Credit Facility | Minimum | LIBOR Plus Margin Rate
Line Of Credit Facility [Line Items]
Interest rate (percent)		1.50%
Senior Line of Credit | Revolving Credit Facility | Minimum | LIBOR Plus Margin Rate | Subsequent Event
Line Of Credit Facility [Line Items]
Interest rate (percent)	2.00%
Senior Line of Credit | Revolving Credit Facility | Minimum | Prime Rate Plus Margin Rate
Line Of Credit Facility [Line Items]
Interest rate (percent)		0.50%
Senior Line of Credit | Revolving Credit Facility | Minimum | Prime Rate Plus Margin Rate | Subsequent Event
Line Of Credit Facility [Line Items]
Interest rate (percent)	1.00%
Senior Line of Credit | Revolving Credit Facility | Maximum
Line Of Credit Facility [Line Items]
Ratio of total debt to EBITDAX		3.5
Senior Line of Credit | Revolving Credit Facility | Maximum | LIBOR Plus Margin Rate
Line Of Credit Facility [Line Items]
Interest rate (percent)		2.50%
Senior Line of Credit | Revolving Credit Facility | Maximum | LIBOR Plus Margin Rate | Subsequent Event
Line Of Credit Facility [Line Items]
Interest rate (percent)	3.00%
Senior Line of Credit | Revolving Credit Facility | Maximum | Prime Rate Plus Margin Rate
Line Of Credit Facility [Line Items]
Interest rate (percent)		1.50%
Senior Line of Credit | Revolving Credit Facility | Maximum | Prime Rate Plus Margin Rate | Subsequent Event
Line Of Credit Facility [Line Items]
Interest rate (percent)	2.00%

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Commitments and Contingencies - Additional Information (Details)	Sep. 30, 2016 USD ($)
Commitments and Contingencies Disclosure [Abstract]
Provision for remediation costs	$ 0

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Incentive Compensation - Additional Information (Details) $ in Millions			3 Months Ended
	Feb. 19, 2016 Time shares	Jan. 12, 2016 shares	Jun. 30, 2016 USD ($)
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Cash settled liabilities reclassified to equity settled liabilities | $			$ 10.1
Restricted Common Units
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Grant of stock units (in shares)	717,654
Restricted Performance Units
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Grant of stock units (in shares)	717,654
Target number of common units, Minimum | Time	0
Target number of common units, Maximum | Time	2
Common Units | Non-employee Directors
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Grant of stock units, fully vested (in shares)		12,368

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Incentive Compensation - Summary of Incentive Compensation Expense (Details) - General and administrative expenses - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Cash—long-term incentive plan	$ 580	$ 3,434	$ 2,990	$ 10,914
Total incentive compensation expense	8,561	9,124	25,900	23,966
Restricted common and subordinated units
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Equity-based compensation	4,487	3,136	10,420	7,086
Restricted Performance Units
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Equity-based compensation	3,066	2,070	11,105	3,330
Board of Directors | Common Units
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Total incentive compensation expense	$ 428	$ 484	$ 1,385	$ 2,636

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Redeemable Preferred Units - Additional Information (Details) $ / shares in Units, $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2016 USD ($) $ / shares shares	Dec. 31, 2015 USD ($) shares	Dec. 31, 2018 shares	Dec. 31, 2017 shares
Class Of Stock [Line Items]
Preferred units, outstanding value | $	$ 54,015	$ 79,162
Preferred Units
Class Of Stock [Line Items]
Partners' equity, preferred units, outstanding (in units)	52,691	77,216
Preferred units, outstanding value | $	$ 54,000	$ 79,200
Accrued distributions | $	$ 1,300	$ 1,900
Preferred units distribution rate	10.00%
Adjusted conversion price (in us dollars per share) | $ / shares	$ 14.2683
Preferred units redeemed, units	18,461
Preferred units redeemed, value | $	$ 19,000
Number of preferred units converted	6,064	39,240
Conversion of preferred units to common units | $	$ 6,100	$ 39,200
Preferred Units | Scenario, Forecast
Class Of Stock [Line Items]
Preferred units redeemed, units			24,425	28,266
Common Units
Class Of Stock [Line Items]
Adjusted conversion rate	30.3431
Conversion of preferred units	184,006	1,190,664
Subordinated Units
Class Of Stock [Line Items]
Adjusted conversion rate	39.7427
Conversion of preferred units	240,986	1,559,502

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Earnings Per Unit - Additional Information (Details)	9 Months Ended
	Sep. 30, 2016 shares
Restricted Performance Units
Earnings Per Share Basic [Line Items]
Number of performance units award included in calculation of diluted EPU	271,256
Common Units
Earnings Per Share Basic [Line Items]
Units issuable upon conversion of preferred units excluded from the calculation of diluted EPU	1,600,000
Subordinated Units
Earnings Per Share Basic [Line Items]
Units issuable upon conversion of preferred units excluded from the calculation of diluted EPU	2,100,000

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Earnings Per Unit - Computation of Basic and Diluted Earnings per Unit (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Earnings Per Share Basic [Line Items]
Net income (loss)	$ 37,535	$ 53,892	$ 27,474	$ (51,575)
NET (INCOME) LOSS ATTRIBUTABLE TO NONCONTROLLING INTERESTS SUBSEQUENT TO INITIAL PUBLIC OFFERING	8	(3)	15	137
DISTRIBUTIONS ON REDEEMABLE PREFERRED UNITS SUBSEQUENT TO INITIAL PUBLIC OFFERING	(1,324)	(2,973)	(4,439)	(4,783)
NET INCOME (LOSS) ATTRIBUTABLE TO THE GENERAL PARTNER AND COMMON AND SUBORDINATED UNITS SUBSEQUENT TO INITIAL PUBLIC OFFERING	36,219	50,916	23,050	(56,671)
ALLOCATION OF NET INCOME (LOSS) SUBSEQUENT TO INITIAL PUBLIC OFFERING ATTRIBUTABLE TO:
General partner interest	0	0	0	0
NET INCOME (LOSS) ATTRIBUTABLE TO THE GENERAL PARTNER AND COMMON AND SUBORDINATED UNITS SUBSEQUENT TO INITIAL PUBLIC OFFERING	36,219	50,916	23,050	(56,671)
Common Units
ALLOCATION OF NET INCOME (LOSS) SUBSEQUENT TO INITIAL PUBLIC OFFERING ATTRIBUTABLE TO:
Allocation of net income (loss)	$ 23,114	$ 25,608	$ 24,343	$ (28,502)
NET INCOME (LOSS) ATTRIBUTABLE TO LIMITED PARTNERS PER COMMON AND SUBORDINATED UNIT:
Per unit (basic) (in dollars per unit)	$ 0.24	$ 0.27	$ 0.26	$ (0.30)
Weighted average units outstanding (basic) (in units)	95,740	96,186	95,086	96,183
Per unit (diluted) (in dollars per unit)	$ 0.24	$ 0.27	$ 0.26	$ (0.30)
Weighted average units outstanding (diluted) (in units)	96,011	96,186	95,619	96,183
Subordinated Units
ALLOCATION OF NET INCOME (LOSS) SUBSEQUENT TO INITIAL PUBLIC OFFERING ATTRIBUTABLE TO:
Allocation of net income (loss)	$ 13,105	$ 25,308	$ (1,293)	$ (28,169)
NET INCOME (LOSS) ATTRIBUTABLE TO LIMITED PARTNERS PER COMMON AND SUBORDINATED UNIT:
Per unit (basic) (in dollars per unit)	$ 0.14	$ 0.27	$ (0.01)	$ (0.30)
Weighted average units outstanding (basic) (in units)	95,189	95,057	95,125	95,057
Per unit (diluted) (in dollars per unit)	$ 0.14	$ 0.27	$ (0.01)	$ (0.30)
Weighted average units outstanding (diluted) (in units)	95,189	95,057	95,467	95,057
Predecessor
Earnings Per Share Basic [Line Items]
Net income (loss)	$ 0	$ 0	$ 0	$ (450)

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Subsequent Events - Additional Information (Details) - USD ($) $ / shares in Units, $ in Millions	Nov. 07, 2016	Oct. 31, 2016	Sep. 30, 2016	Apr. 15, 2016	Apr. 14, 2016
Revolving Credit Facility | Senior Line of Credit
Subsequent Event [Line Items]
Borrowing base			$ 450.0	$ 450.0	$ 550.0
Subsequent Event | Common Units
Subsequent Event [Line Items]
Quarterly cash distribution declared	$ 0.2875
Subsequent Event | Subordinated Units
Subsequent Event [Line Items]
Quarterly cash distribution declared	$ 0.18375
Subsequent Event | Revolving Credit Facility | Senior Line of Credit
Subsequent Event [Line Items]
Borrowing base		$ 500.0