Westmoreland Resource Partners (WMLPQ) 10-Q 31 Oct 17 2017 Q3 Quarterly report Financial data

Document And Entity Information

Document And Entity Information - shares	9 Months Ended
	Sep. 30, 2017	Oct. 27, 2017
Document and Entity Information [Abstract]
Entity Registrant Name	Westmoreland Resource Partners, LP
Entity Central Index Key	1,412,347
Current Fiscal Year End Date	--12-31
Entity Filer Category	Non-accelerated Filer
Document Type	10-Q
Document Period End Date	Sep. 30, 2017
Document Fiscal Year Focus	2,017
Document Fiscal Period Focus	Q3
Amendment Flag	false
Entity Common Stock, Shares Outstanding		1,284,840

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Current assets:
Cash and cash equivalents	$ 22,348	$ 15,094
Receivables	41,294	37,587
Inventories	14,948	17,559
Other current assets	3,855	6,728
Total current assets	82,445	76,968
Property, plant and equipment:
Land, mineral rights, property, plant and equipment	366,452	359,748
Less accumulated depreciation, depletion and amortization	(155,524)	(124,130)
Net property, plant and equipment	210,928	235,618
Advanced coal royalties	8,643	8,815
Restricted investments	39,208	37,741
Intangible assets, net of accumulated amortization of $5.7 million and $4.1 million at September 30, 2017 and December 31, 2016, respectively	25,317	27,148
Deposits and other assets	807	617
Total Assets	367,348	386,907
Current liabilities:
Current installments of long-term debt	4,220	3,819
Accounts payable and accrued expenses:
Trade	16,178	19,397
Deferred revenue	1,778	3,547
Production taxes	19,370	16,319
Asset retirement obligations	10,483	10,775
Other current liabilities	2,094	3,284
Total current liabilities	54,123	57,141
Long-term debt, less current installments	318,800	313,827
Asset retirement obligations, less current portion	34,409	41,402
Other liabilities	2,249	2,647
Total liabilities	409,581	415,017
Partners' capital (deficit):
Limited partners	27,133	28,261
General partner (35,291 units outstanding as of September 30, 2017 and December 31, 2016)	31,718	33,281
Accumulated other comprehensive loss	164	(189)
Total Westmoreland Resource Partners, LP capital	(42,233)	(28,110)
Total Liabilities and Partners’ Capital	367,348	386,907
Series A Convertible Units [Member]
Partners' capital (deficit):
Limited partners	(55,286)	(46,103)
Series B Convertible Units [Member]
Partners' capital (deficit):
Limited partners	$ (45,962)	$ (43,360)

Condensed Consolidated Balance3

Condensed Consolidated Balance Sheets (Parentheticals) - USD ($)	Sep. 30, 2017	Dec. 31, 2016
Accumulated amortization	$ 5,700,000	$ 4,100,000
Limited partner capital account, units outstanding	1,284,840	1,221,060
General partner capital account, units outstanding	35,291	35,291
Series A Convertible Units [Member]
Limited partner capital account, units outstanding	16,793,429	15,656,551
Series B Convertible Units [Member]
Limited partner capital account, units outstanding	4,512,500	4,512,500

Condensed Consolidated Statemen

Condensed Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Revenues	$ 85,606	$ 90,309	$ 241,462	$ 263,258
Costs and expenses:
Cost of sales	61,952	65,949	181,225	200,110
Depreciation, depletion and amortization	9,692	11,554	30,153	41,366
Selling and administrative	4,484	3,178	12,095	9,290
Loss (gain) on sales of assets	27	302	(335)	1,938
Loss on impairment	0	3,366	0	8,067
Total cost and expenses	76,155	84,349	223,138	260,771
Operating income	9,451	5,960	18,324	2,487
Other (expense) income:
Interest expense	(10,989)	(10,438)	(32,121)	(30,533)
Interest income	221	216	660	635
Other income	63	68	172	122
Change in fair value of warrants	(106)	(82)	437	(268)
Total other expenses	(10,811)	(10,236)	(30,852)	(30,044)
Net loss	(1,360)	(4,276)	(12,528)	(27,557)
Less net loss allocated to general partner	(3)	(7)	(22)	(44)
Net loss allocated to limited partners	(1,357)	(4,269)	(12,506)	(27,513)
Unrealized and realized gain (loss) on available-for-sale securities	102	(29)	353	233
Comprehensive loss attributable to the Partnership	$ (1,258)	$ (4,305)	$ (12,175)	$ (27,324)
Weighted average number of common limited partner units outstanding, basic and diluted:
Distribution per general partner unit (dollars per unit)	$ 0.1333	$ 0.2000	$ 0.3999	$ 0.6
Common units [Member]
Net loss per common limited partner unit, basic and diluted:
Basic and diluted (in dollars per share)	$ (0.04)	$ (0.27)	$ (0.49)	$ (1.33)
Weighted average number of common limited partner units outstanding, basic and diluted:
Basic and diluted (in units)	1,285	5,900	1,271	5,895
Distribution per limited partner unit (dollars per unit)	$ 0.1333	$ 0.2000	$ 0.3999	$ 0.600
Series A Convertible Units [Member]
Weighted average number of common limited partner units outstanding, basic and diluted:
Distribution per limited partner unit (dollars per unit)	$ 0	$ 0.2000	$ 0	$ 0.4

Condensed Consolidated Stateme5

Condensed Consolidated Statements of Partners' Capital - 9 months ended Sep. 30, 2017 - USD ($) $ in Thousands	Total	Common Units [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Limited Partner [Member]	Limited Partner [Member]Common Units [Member]	Limited Partner [Member]Liquidation [Member]	General Partner [Member]	Series A Convertible Units [Member]Limited Partner [Member]	Series B Convertible Units [Member]Limited Partner [Member]
Beginning balance at Dec. 31, 2016	$ (28,110)		$ (189)	$ (61,202)	$ 28,261	$ 0	$ 33,281	$ (46,103)	$ (43,360)
Beginning balance (in units) at Dec. 31, 2016		1,221,060		22,246,809	1,221,060	856,698	35,291	15,656,551	4,512,500
Increase (Decrease) in Partners' Capital [Roll Forward]
Net loss	(12,528)			$ (12,506)	$ (721)		$ (22)	$ (9,183)	$ (2,602)
Equity-based compensation	164			$ 164	$ 164
Issuance of units to LTIP participants (in units)				63,780	63,780
Other comprehensive income	353		353
Distribution for acquisition of Johnson Run (Note 12)	(1,526)						(1,526)
Common unit distributions (in units)				1,136,878				1,136,878
Cash distribution to unitholders	(586)			$ (571)	$ (571)		(15)
Ending balance at Sep. 30, 2017	$ (42,233)		$ 164	$ (74,115)	$ 27,133	$ 0	$ 31,718	$ (55,286)	$ (45,962)
Ending balance (in units) at Sep. 30, 2017		1,284,840		23,447,467	1,284,840	856,698	35,291	16,793,429	4,512,500

Condensed Consolidated Stateme6

Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Cash flows from operating activities:
Net loss	$ (12,528)	$ (27,557)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation, depletion and amortization	30,153	41,366
Accretion of asset retirement obligations	4,008	4,209
Equity-based compensation	164	190
Impairment charges	0	8,067
Non-cash interest expense	6,981	6,879
Amortization of deferred financing costs	2,145	1,953
Other	(231)	2,206
Changes in operating assets and liabilities:
Receivables, net	(3,707)	(6,200)
Inventories	3,458	5,099
Accounts payable and accrued expenses	(233)	(9,100)
Interest payable	(250)	241
Deferred revenue	(1,769)	2,301
Other assets and liabilities	3,570	3,201
Asset retirement obligations	(8,906)	(7,413)
Net cash provided by operating activities	22,855	25,442
Net cash used in investing activities
Additions to property, plant, equipment and other	(8,725)	(4,780)
Advance royalties payments	(493)	(33)
Proceeds from sales of restricted investments	6,129	3,087
Purchases of and change in restricted investments	(7,347)	(6,064)
Net proceeds from sales of assets	592	498
Net cash used in investing activities	(9,844)	(7,292)
Cash flows from financing activities:
Repayments of long-term debt	(3,645)	(3,171)
Cash distributions to unitholders	(586)	(9,823)
Acquisition under common control of Johnson Run	(1,526)	0
Net cash used in financing activities	(5,757)	(12,994)
Net increase in cash and cash equivalents	7,254	5,156
Cash and cash equivalents, beginning of the year	15,094	3,710
Cash and cash equivalents, end of the year	22,348	8,866
Supplemental disclosures of cash flow information:
Cash paid for interest	23,244	21,460
Non-cash transactions:
Accrued purchases of property and equipment	411	721
Property, plant and equipment acquired with debt	$ 0	$ 9,259

Basis of Presentation

Basis of Presentation	9 Months Ended
	Sep. 30, 2017
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	1. BASIS OF PRESENTATION The accompanying consolidated financial statements (unaudited) include the accounts and operations of Westmoreland Resource Partners, LP (the “Partnership”) and its consolidated subsidiaries and have been prepared in accordance with United States Generally Accepted Accounting Principles (“GAAP”) and require the use of management’s estimates. The financial information contained in this Quarterly Report on Form 10-Q (“Quarterly Report”) is unaudited, but reflects all adjustments which, in the opinion of management, are necessary for a fair presentation of the financial information for the periods shown. Such adjustments are of a normal recurring nature. Certain prior-period amounts have been reclassified to conform with the financial statement line items used by Westmoreland Coal Company (“WCC”), the parent of our general partner Westmoreland Resources GP, LLC (the “GP”). The results of operations for the nine months ended September 30, 2017 are not necessarily indicative of results to be expected for the year ending December 31, 2017. These unaudited quarterly consolidated financial statements should be read in conjunction with the audited consolidated financial statements and notes to the consolidated financial statements included in the Partnership’s Annual Report on Form 10-K for the year ended December 31, 2016 (“ 2016 Form 10-K”). There were no changes to our significant accounting policies from those disclosed in the audited consolidated financial statements and notes to the consolidated financial statements thereto contained in our 2016 Form 10-K, except as described below. Recently Issued Accounting Pronouncements In February 2016, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2016-02, Leases (Topic 842) which requires companies leasing assets to recognize on their balance sheet a liability to make lease payments (the lease liability) and a right-of-use asset representing its right to use the underlying asset for the lease term on contracts longer than one year. The lessee is permitted to make an accounting policy election to not recognize lease assets and lease liabilities for short-term leases. How leases are recorded on the balance sheet represents a significant change from previous GAAP guidance as described in Accounting Standards Codification (“ASC”) Topic 840, Leases . ASU 2016-02 maintains a distinction between finance leases and operating leases similar to the distinction under previous lease guidance for capital leases and operating leases. ASU 2016-02 is effective for fiscal years beginning after December 15, 2018, and early adoption is permitted. Adoption of the new lease accounting standard will require the Partnership to apply the new standard to the earliest period using a modified retrospective approach. The Partnership is currently in the process of evaluating the impact of the new standard, including the evaluation of the impact, if any, on changes to business processes, systems and controls to support recognition and disclosure under the new guidance, however, at this time is unable to determine the impact this standard will have on the financial statements and related disclosures. In January 2016, the FASB issued ASU 2016-01, Financial Instruments - Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities which updates certain aspects of recognition, measurement, presentation and disclosure of financial instruments. This standard is effective for interim and annual periods beginning after December 15, 2017. We are currently evaluating the effect adopting this guidance will have on our consolidated financial statements and footnote disclosures. In May 2014, the FASB issued ASU 2014-09, Revenue from Contracts with Customers which was issued as a new Topic, ASC Topic 606. The new revenue recognition standard supersedes all existing revenue recognition guidance. Under this ASU, an entity should recognize revenue when it transfers promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. ASU 2015-14, issued in August 2015, deferred the effective date of ASU 2014-09 to the first quarter of 2018, with early adoption permitted in the first quarter of 2017. The Partnership intends to adopt the amended guidance as of January 1, 2018. In March, April, May, and December 2016, the FASB issued the following updates, respectively, to provide supplemental adoption guidance and clarification to ASU 2014-09. These standards must be adopted concurrently upon the adoption of ASU 2014-09. We are currently evaluating the potential effects of adopting the provisions of these updates. • ASU 2016-08, Revenue from Contracts with Customers: Principal versus Agent Considerations (Reporting Revenue Gross versus Net) . • ASU 2016-10, Revenue from Contracts with Customers: Identifying Performance Obligations and Licensing . • ASU 2016-12, Revenue from Contracts with Customers: Narrow-Scope Improvements and Practical Expedients . • ASU 2016-19, Technical Corrections and Improvements . We have established an implementation team to execute a multi-phase plan to adopt the requirements of the new standard. The team has finalized its conclusions on how the guidance will be applied to our coal sales contracts and the Partnership does not believe the implementation of the new standard will have a material impact on its consolidated financial statements. The team is continuing to evaluate the expanded disclosures required by the new standard and reviewing our system capabilities, processes, and internal controls over financial reporting to ensure the appropriate information will be available for these disclosures. Under the new standard, companies may use either of the following transition methods: (i) a full retrospective approach reflecting the application of the standard in each prior reporting period with the option to elect certain practical expedients; or (ii) a modified retrospective approach with the cumulative effect of initially adopting ASU 2014-09 recognized at the date of adoption (which includes additional footnote disclosures). We will be adopting the standard under the full retrospective approach.

Inventories

Inventories	9 Months Ended
	Sep. 30, 2017
Inventory Disclosure [Abstract]
Inventories	2. INVENTORIES Inventories consisted of the following: September 30, 2017 December 31, 2016 (In thousands) Coal stockpiles $ 4,217 $ 4,518 Materials and supplies 10,781 13,091 Reserve for obsolete inventory (50 ) (50 ) Total $ 14,948 $ 17,559

Restricted Investments

Restricted Investments	9 Months Ended
	Sep. 30, 2017
Investments, Debt and Equity Securities [Abstract]
Restricted Investments	3. RESTRICTED INVESTMENTS The Partnership invests certain bond collateral in a limited selection of fixed-income investment options and receives the investment returns on these investments. These investments are not available to meet the Partnership’s general cash needs. These investments include available-for-sale securities. Available-for-sale securities are reported at fair value with unrealized gains and losses excluded from earnings and reported in Accumulated other comprehensive income (loss) . The carrying value and estimated fair value of our restricted investments were as follows: September 30, 2017 December 31, 2016 (In thousands) Cash and cash equivalents $ 7,994 $ 8,581 Available-for-sale securities 31,214 29,160 $ 39,208 $ 37,741 Available-for-Sale Restricted Investments The cost basis, gross unrealized holding gains and losses and fair value of available-for-sale securities were as follows: September 30, 2017 December 31, 2016 (In thousands) Cost basis $ 31,050 $ 29,349 Gross unrealized holding gains 431 167 Gross unrealized holding losses (267 ) (356 ) Fair value $ 31,214 $ 29,160

Impairment Charges

Impairment Charges	9 Months Ended
	Sep. 30, 2017
Restructuring and Related Activities [Abstract]
Impairment Charges	4. IMPAIRMENT CHARGES In April 2016, we entered into an agreement to purchase 1.0 million tons of coal (“purchased coal”) from a third party through December 31, 2017. The purchased coal has been used to fulfill specific customer sales orders under preexisting long-term sales agreements. As a result of the purchased coal agreement, we down-sized our work force and incurred a $0.3 million severance charge for the three months ended June 30, 2016 and an impairment charge on excess equipment of $4.2 million for the three months ended June 30, 2016. Impairment charges for the three months ended September 30, 2016 were $3.2 million on a shovel which was parted and scrapped. There were no impairment charges incurred for the nine months ended September 30, 2017 .

Debt and Lines of Credit

Debt and Lines of Credit	9 Months Ended
	Sep. 30, 2017
Disclosure Text Block [Abstract]
Debt and Lines of Credit	5. DEBT AND LINES OF CREDIT Debt consisted of the following: September 30, 2017 December 31, 2016 (In thousands) Term Loan $ 311,628 $ 306,189 Capital lease obligations 14,407 16,351 Other 430 589 Total debt outstanding 326,465 323,129 Less debt issuance costs (3,445 ) (5,483 ) Less current installments (4,220 ) (3,819 ) Total debt outstanding, less current installments $ 318,800 $ 313,827 The following table presents remaining aggregate contractual debt maturities of all long-term debt: September 30, 2017 (In thousands) 2017 $ 1,660 2018 315,804 2019 4,105 2020 1,694 2021 1,586 Thereafter 1,616 Total debt $ 326,465 Credit Facilities Covenant Compliance Our lending arrangements contain, among other terms, events of default and various affirmative and negative covenants, financial covenants and cross-default provisions. We are in compliance with all covenants and conditions under our debt agreements as of September 30, 2017, and based on our quarterly projections, we anticipate that we will maintain compliance with the financial covenants and have sufficient liquidity to meet our obligations as they become due within one year after the date of the filing of this Quarterly Report. Continuing to meet our obligations and to comply with our financial covenants depends on our ability to generate adequate cash flows and refinance or extend the maturity of debt obligations as they become due. Certain affirmative covenants provide that an audit opinion on our consolidated financial statements that includes an explanatory paragraph expressing substantial doubt about the Partnership's ability to continue as a going concern constitutes an event of default, which would cause the term loan of the Partnership ("Term Loan") to become immediately due and payable. Should we be unable to comply with any future covenant, we will be required to seek a waiver of such covenant to avoid an event of default. Covenant waivers and modifications may be expensive to obtain, or, potentially, unavailable. Term Loan Pursuant to the financing agreement (“2014 Financing Agreement”), dated as of December 31, 2014, by and among Oxford Mining Company, LLC, the Partnership and each of its subsidiaries, lenders from time to time party thereto, and U.S. Bank National Association, as administrative agent, the Term Loan matures on December 31, 2018 and pays interest on a quarterly basis at a variable rate equal to the 3-month London Interbank Offered Rate (“LIBOR”) at each period end ( 1.30% as of September 30, 2017 ), subject to a floor of 0.75% , plus 8.50% or the reference rate, as defined in the 2014 Financing Agreement. As of September 30, 2017 , the cash interest rate was 9.80% . The Term Loan is a primary obligation of Oxford Mining Company, LLC, a wholly owned subsidiary of the Partnership, is guaranteed by the Partnership and its subsidiaries, and is secured by substantially all of the Partnership’s and its subsidiaries’ assets. The 2014 Financing Agreement also provides for Paid-In-Kind Interest (“PIK Interest”) at a variable rate between 1.00% and 3.00% based on our consolidated total net leverage ratio, as defined in the 2014 Financing Agreement. The rate of PIK Interest is determined on a quarterly basis with the PIK Interest added quarterly to the then-outstanding principal amount of the Term Loan. PIK Interest under the 2014 Financing Agreement was $2.3 million and $7.0 million for the three and nine months ended September 30, 2017 , respectively. The outstanding Term Loan amount as of September 30, 2017 represents the principal balance of $288.6 million , plus PIK Interest of $23.1 million . The 2014 Financing Agreement requires mandatory prepayment of principal with proceeds from the receipt of oil and gas royalties. During the three and nine months ended September 30, 2017 , respectively, we paid down $0.3 million and $1.5 million of the Term Loan with such proceeds. The 2014 Financing Agreement limits cash distributions to an aggregate amount not to exceed $15.0 million (“Restricted Distributions”), if we have: (i) a consolidated total net leverage ratio of greater than 3.75 , or fixed charge coverage ratio of less than 1.00 (as such ratios are defined in the 2014 Financing Agreement), or (ii) liquidity of less than $7.5 million , after giving effect to such cash distribution and applying our availability under the Revolver. As of September 30, 2017 , our consolidated total net leverage ratio is in excess of 3.75 , and we have made $14.8 million in Restricted Distributions. With the declaration of distribution on October 27, 2017 , we will have utilized the full $15.0 million limit on Restricted Distributions and we will be restricted from making any further distributions under the terms of the 2014 Financing Agreement unless we meet the above ratios and liquidity requirements. Revolver On October 23, 2015, the Partnership and its subsidiaries entered into a loan and security agreement with the lenders party thereto and Canadian Imperial Bank of Commerce (formerly known as The PrivateBank and Trust Company), as administrative agent (the "Revolver"), which permits borrowings up to the aggregate principal amount of $15.0 million , subject to borrowing base calculations as defined in the agreement and letters of credit in an aggregate outstanding amount of up to $10.0 million , which reduces availability under the Revolver on a dollar-for-dollar basis. At September 30, 2017 , availability under the Revolver was $14.8 million . The Revolver contains the same limitations on Restricted Distributions as described above under the 2014 Financing Agreement. The Revolver has a maturity date of December 31, 2017. Capital Lease Obligations The Partnership engages in leasing transactions for equipment utilized in its mining operations. The Partnership did not enter into any new capital leases during the nine months ended September 30, 2017 .

Distribution of Available Cash

Distribution of Available Cash	9 Months Ended
	Sep. 30, 2017
Equity [Abstract]
Distribution of Available Cash	6. DISTRIBUTIONS OF AVAILABLE CASH We distribute 100% of our available cash within 45 days after the end of each quarter to unitholders of record and to our GP, subject to the conditions and limitations within the 2014 Financing Agreement and the loan and security agreement governing the Revolver. Available cash is determined at the end of each quarter and is generally defined in the Partnership’s Fourth Amended and Restated Agreement of Limited Partnership, as amended (the “Partnership Agreement”), as all cash and cash equivalents on hand at the end of each quarter less reserves established by our GP in its reasonable discretion for future cash requirements. These reserves are retained to provide for the conduct of our business, the payment of debt principal and interest, to provide funds for future distributions for any one or more of the next four quarters, and to comply with applicable law. Our available cash may also include, if our GP so determines, all or any portion of the cash on hand on the date of determination of available cash for the quarter resulting from working capital borrowings made subsequent to the end of such quarter. We made cash distributions as follows (in thousands): Three Months Ended September 30, Nine Months Ended September 30, 2017 2016 2017 2016 Limited partner common units $ 171 $ 1,148 $ 505 $ 3,438 Series A convertible units — 3,132 — 6,263 General partner units 5 8 15 23 Warrants 22 33 66 99 Both our 2014 Financing Agreement and loan and security agreement governing the Revolver restrict us from making cash distributions in excess of $15.0 million in the aggregate when certain ratios and liquidity requirements are not met. As of September 30, 2017 , one of these ratios was not met, and we do not foresee it being met in the near future. As of September 30, 2017 , we have made $14.8 million in Restricted Distributions. On October 27, 2017 , we announced a quarterly cash distribution for the quarter ended September 30, 2017 ("Third Quarter Distribution"), of $0.1155 per limited partner common unit, general partner unit and warrant with distribution rights. This $0.1155 distribution is a per-unit reduction of $0.0178 from the prior quarter distribution of $0.1333 per limited partner common unit, general partner unit and warrant with distribution rights as a result of our cumulative distributions exhausting the $15.0 million in allowed Restricted Distributions. The cash distribution totaling approximately $0.2 million will be paid on November 14, 2017 to all common unitholders and warrant holders of record as of November 7, 2017 . Additionally, we declared a paid-in-kind unit distribution of $0.1155 per Series A Convertible Unit. If we are unable to either refinance or modify our Term Loan or meet the required ratios noted in Note 5. Debt And Lines Of Credit to the consolidated financial statements (unaudited), we will no longer be permitted to make Restricted Distributions, including any cash distributions to WCC, subsequent to payment of the Third Quarter Distribution.

Fair Value Measurements

Fair Value Measurements	9 Months Ended
	Sep. 30, 2017
Fair Value Disclosures [Abstract]
Fair Value Measurements	7. FAIR VALUE MEASUREMENTS Fair value is the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. The fair value hierarchy prioritizes the inputs to valuation techniques used to measure fair value. The hierarchy, as defined below, gives the highest priority to unadjusted quoted prices in active markets for identical assets or liabilities and the lowest priority to unobservable inputs. For other fair value disclosures, see also Note 3. Restricted Investments to the consolidated financial statements (unaudited). • Level 1, defined as observable inputs such as quoted prices in active markets for identical assets. • Level 2, defined as observable inputs other than Level 1 prices. These include quoted prices for similar assets or liabilities in an active market, quoted prices for identical assets and liabilities in markets that are not active, or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities. • Level 3, defined as unobservable inputs in which little or no market data exists, therefore requiring an entity to develop its own assumptions. The book values of cash and cash equivalents, receivables and accounts payable are considered to be representative of their respective fair values because of the immediate short-term maturity of these financial instruments. In connection with our refinancing in June 2013, certain of the second lien lenders and lender affiliates received warrants entitling them to purchase common units. The warrants are measured at fair value at each balance sheet date. As of September 30, 2017 , the fair value of each warrant was $2.85 , based on the following: spot price of $2.97 per unit as traded on the New York Stock Exchange, with an exercise price of $0.12 per unit. The fair value of the warrants are a Level 1 measurement. Long-term debt fair value estimates are based on observed prices for securities with an active trading market when available (Level 2) and otherwise using discount rate estimates based on interest rates (Level 3). As of September 30, 2017 , the Partnership valued the Term Loan with Level 3 fair values. The estimated fair values of the Partnership’s debt with fixed and variable interest rates are as follows: Fixed Interest Rate Variable Interest Rate Carrying Value Fair Value Carrying Value Fair Value (In thousands) September 30, 2017 $ 14,837 $ 14,837 $ 308,183 $ 210,349 December 31, 2016 16,940 16,940 300,706 277,867

Unit-based Compensation

Unit-based Compensation	9 Months Ended
	Sep. 30, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Unit-based Compensation	8. UNIT-BASED COMPENSATION We grant employees and non-employee directors restricted common units under our Long-Term Incentive Plan (“LTIP”). We recognized compensation expense from unit-based arrangements as shown in the following table: Three Months Ended September 30, Nine Months Ended September 30, 2017 2016 2017 2016 (In thousands) Recognition of fair value of restricted common units over the vesting period $ 83 $ 63 $ 164 $ 190 A summary of restricted common unit award activity for the nine months ended September 30, 2017 is as follows: Units Weighted Average Grant-Date Fair Value Unamortized Compensation Expense (In thousands) Unvested balance at December 31, 2016 63,780 $ 3.92 Granted 82,240 3.04 Vested (63,780 ) 3.92 Unvested balance at September 30, 2017 82,240 $ 3.04 $ 128

Commitments and Contingencies

Commitments and Contingencies	9 Months Ended
	Sep. 30, 2017
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	9. COMMITMENTS AND CONTINGENCIES Coal Sales Contracts We are committed under long-term contracts to sell coal that meets certain quality requirements at specified prices. Many of these prices are subject to cost pass-through or cost adjustment provisions that mitigate some risk from rising costs. Quantities sold under some of these contracts may vary from year to year within certain limits at the option of the customer or us. As of September 30, 2017 , the remaining terms of our long-term contracts range from one to nine years. Purchase Commitments In April 2016, we entered into a fixed price agreement to purchase 1.0 million tons of coal from a third party through December 31, 2017. Through September 30, 2017 we have purchased 0.9 million coal tons under the purchase commitment. From time to time, we purchase coal from third parties in order to meet quality or delivery requirements under our customer contracts. We buy coal on the spot market, and the cost of that coal is dependent upon the market price and quality of the coal. Litigation There have been no material changes in our litigation since December 31, 2016 . For additional information, refer to Note 21. Commitments and Contingencie s to the consolidated financial statements of our 2016 Form 10-K. Guarantees Our GP and the Partnership guarantee certain obligations of our subsidiaries. We believe that these guarantees will expire without any liability to the guarantors, and therefore will not have a material adverse effect on our financial position, liquidity or operations.

Partners' Capital and Convertib

Partners' Capital and Convertible Units	9 Months Ended
	Sep. 30, 2017
Earnings Per Share [Abstract]
Partners' Capital and Convertible Units	10. PARTNERS' CAPITAL AND CONVERTIBLE UNITS Our capital accounts are comprised of approximately 0.15% beneficial general partner interests and 99.85% limited partner interests as of September 30, 2017 . Our limited partners have limited rights of ownership as provided for under our Partnership Agreement and the right to participate in our distributions. Our GP manages our operations and participates in our distributions, including certain incentive distributions pursuant to the incentive distribution rights, which are nonvoting limited partner interests held by our GP. Pursuant to our Partnership Agreement, our GP participates in losses and distributions based on its interest. The GP’s participation in the allocation of losses and distributions is not limited and therefore, such participation can result in a deficit to its capital account. Allocation of losses and distributions, including distributions for previous transactions between entities under common control, has resulted in a deficit to certain limited partners’ capital accounts included in our consolidated balance sheets. Series A Convertible Units WCC, the owner of our GP, holds and participates in distributions on our Series A Convertible Units. Series A Convertible Units have the right to share in distributions from us on a pro-rata basis with the common units. All or any portion of each distribution payable in respect to the Series A Convertible Units (the “Series A Convertible Unit Distribution”) may, at our Board of Directors’ ("Board") election, be paid in Series A paid-in-kind Units (“Series A PIK Units”). To the extent any portion of the Series A Convertible Unit Distribution is paid in Series A PIK Units for any quarter, the distribution to the holders of incentive distribution rights shall be reduced by that portion of the distribution that is attributable to the payment of those Series A PIK Units. The Series A Convertible Units will convert into common units, on a one -for-one basis, at the earlier of the date on which we first make a regular quarterly cash distribution with respect to any quarter to holders of common units in an amount at least equal to $0.22 per common unit or upon a change of control. The Series A Convertible Units have the same voting rights as if they were outstanding common units and will vote together with the common units as a single class. In addition, the Series A Convertible Units are entitled to vote as a separate class on any matters that materially adversely affect the rights or preferences of the Series A Convertible Units in relation to other classes of partnership interests or as required by law. Series B Convertible Units On October 28, 2016, we issued 4,512,500 Series B Convertible Units representing limited partner interests in the Partnership (the “Series B Units”) to WCC in exchange for WCC’s 4,512,500 common units (the “Exchange”). Upon issuance of the Series B Units in the Exchange, WCC’s common units were canceled. The Series B Units do not share in distributions with the common units and are convertible at the option of the holder on a one -for-one basis into common units on the day after the record date for a cash distribution on the common units in which the Partnership is unable to make such a distribution without exceeding its restricted payment basket under the 2014 Financing Agreement. The Series B Units will convert automatically upon a change of control or a dissolution or liquidation of the Partnership. The Series B Units have the same voting rights as if they were outstanding common units and will vote together with the common units as a single class. In addition, the Series B Units are entitled to vote as a separate class on any matters that materially adversely affect the rights or preferences of the Series B Units in relation to other classes of partnership interests or as required by law. Concurrently with the Exchange, we entered into Amendment No. 2 to the Partnership Agreement, which established the terms of the Series B Units. Liquidation Units All subordinated units were transferred to WCC in connection with our GP being acquired on December 31, 2014. These units were then converted to liquidation units which have no distribution or voting rights, other than in connection with liquidation. For tax purposes, liquidation units are allocated additional taxable income but no additional taxable loss compared to other unit classes. Warrants In June 2013, in connection with a prior credit facility, certain lenders and lender affiliates received warrants entitling them to purchase 166,557 common units at $0.12 per unit. The warrants participate in distributions whether or not exercised. Outstanding Units September 30, 2017 December 31, 2016 Limited partner common units 1,284,840 1,221,060 Series A convertible units 16,793,429 15,656,551 Series B convertible units 4,512,500 4,512,500 Liquidation units 856,698 856,698 Warrants 166,557 166,557 General partner units 35,291 35,291 Net Income (Loss) Attributable to Limited Partners Net income (loss) is allocated to the GP and the limited partners in accordance with their respective ownership percentages, after giving effect to distributions and declared distributions on Series A Convertible Units, and General Partner units, including incentive distribution rights. Basic and diluted limited partners’ net income (loss) per common unit is calculated by dividing limited partners’ interest in net income (loss) by the weighted average number of outstanding limited partner units during the period. We determined basic and diluted limited partners’ net loss per common unit as follows (in thousands, except per unit amounts): Three Months Ended September 30, Nine Months Ended September 30, 2017 2016 2017 2016 Net loss attributable to the Partnership $ (1,360 ) $ (4,276 ) $ (12,528 ) $ (27,557 ) Less: Paid and declared distributions on Series A convertible units 1,940 2,087 6,302 8,349 Series A convertible units share of undistributed loss (2,573 ) (4,789 ) (14,311 ) (28,106 ) Series B convertible units share of undistributed loss (695 ) — (3,947 ) — Paid and declared distributions on General Partner units 4 8 14 23 General Partner units share of undistributed loss (6 ) (11 ) (31 ) (63 ) Paid and declared distributions on Warrants 19 22 63 88 Net loss available to limited partners $ (49 ) $ (1,593 ) $ (618 ) $ (7,848 ) Weighted average number of common units used in computation of Limited Partners' net loss per common unit (basic and diluted) 1,285 5,900 1,271 5,895 Limited Partners' net loss per common unit (basic and diluted) $ (0.04 ) $ (0.27 ) $ (0.49 ) $ (1.33 )

Accumulated Other Comprehensive

Accumulated Other Comprehensive Income (loss)	9 Months Ended
	Sep. 30, 2017
Equity [Abstract]
Accumulated Other Comprehensive Income (Loss)	11. ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) The following table reflects the changes in accumulated other comprehensive income (loss) arising from our available-for-sale securities (net of tax): Accumulated Other Comprehensive Income (Loss) (In thousands) Balance at December 31, 2016 $ (189 ) Other comprehensive income before reclassification 362 Amounts reclassified from accumulated other comprehensive loss (9 ) Balance at September 30, 2017 $ 164 The following table reflects the reclassifications out of accumulated other comprehensive income (loss) for the three and nine months ended September 30, 2017 : Amount reclassified from accumulated other comprehensive income (loss) Affected line item in the statements where presented Details about accumulated other comprehensive income (loss) components Three Months Ended September 30, 2017 Nine Months Ended September 30, 2017 (In thousands) Realized gains on available-for-sale securities $ (23 ) $ (9 ) Other income

Related Party Transactions

Related Party Transactions	9 Months Ended
	Sep. 30, 2017
Related Party Transactions [Abstract]
Related Party Transactions	12. RELATED PARTY TRANSACTIONS In 2015, the Partnership and the GP entered into an administrative and operational services agreement (the “Services Agreement”). The Services Agreement is terminable by either party upon 120 days’ written notice prior to the end of any fiscal year. Under the terms of the Services Agreement, our GP provides services through its employees, or employees of its affiliates, to us and is reimbursed for all related costs incurred on our behalf. Pursuant to the Services Agreement, the Partnership engaged the GP to continue providing services such as general administrative and management, engineering, operations (including mining operations), geological, corporate development, real property, marketing, and other services to the Partnership. Administrative services include without limitation legal, finance and accounting, treasury, insurance administration and claims processing, risk management, health, safety and environmental, information technology, human resources, credit, payroll, internal audit and tax. Under the Services Agreement the Partnership pays the GP a fixed annual management fee of $2.2 million for certain executive and administrative services and reimburses the GP at cost for other expenses. Pursuant to Amendment 3 to the Services Agreement dated September 29, 2017, the current terms of the Services Agreement expires on March 31, 2018, and automatically renews for successive one year periods unless terminated. The primary reimbursements to our GP under the Service Agreement during the three and nine months ended September 30, 2017 were for employee-related costs. Reimbursable costs under the Services Agreement totaling $1.2 million and $2.7 million were included in accounts payable as of September 30, 2017 and December 31, 2016 , respectively. In December 2016, the Partnership prepaid the GP for the 2017 annual management fee of $2.2 million , of which $0.5 million was included in Other current assets at September 30, 2017 . On January 9, 2017, the Partnership acquired surface coal reserves (“Johnson Run”) through conveyance of leases and recoupable advance royalty payments from Buckingham Coal Company, LLC, a wholly owned subsidiary of WCC, for $1.7 million . Finally, we sold coal to a subsidiary of WCC, which generated $3.2 million and $15.3 million in revenues for the three and nine months ended September 30, 2017 , respectively, and $6.2 million and $20.5 million in revenues for the three and nine months ended September 30, 2016 , respectively.

Segment Information

Segment Information	9 Months Ended
	Sep. 30, 2017
Segment Reporting [Abstract]
Segment Information	13. SEGMENT INFORMATION We operate in one business segment. We operate surface coal mines in Ohio and Wyoming, selling high-value thermal coal to utilities, industrial customers, municipalities and other coal-related entities primarily in the Midwest and Wyoming. All of our operations have similar economic characteristics including but not limited to coal quality, geology, coal marketing opportunities, mining and transportation methods and regulatory issues. Our operating and executive management makes its decisions based on consolidated reports. Our Ohio operating subsidiaries share customers and a particular customer may receive coal from any one of such Ohio operating subsidiaries. We also lease or sublease coal reserves to others through our Ohio operations in exchange for a per ton royalty rate.

Subsequent Events

Subsequent Events	9 Months Ended
	Sep. 30, 2017
Subsequent Events [Abstract]
Subsequent Events	14. SUBSEQUENT EVENTS The Partnership has evaluated subsequent events in accordance with ASC 855, Subsequent Events , through the filing date of this Quarterly Report, and determined that no events have occurred that have not been disclosed elsewhere in the notes to the consolidated financial statements (unaudited) that would require adjustments to disclosures in the consolidated financial statements (unaudited).

Basis of Presentation (Policies

Basis of Presentation (Policies)	9 Months Ended
	Sep. 30, 2017
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Recent Accounting Pronouncements	Recently Issued Accounting Pronouncements In February 2016, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2016-02, Leases (Topic 842) which requires companies leasing assets to recognize on their balance sheet a liability to make lease payments (the lease liability) and a right-of-use asset representing its right to use the underlying asset for the lease term on contracts longer than one year. The lessee is permitted to make an accounting policy election to not recognize lease assets and lease liabilities for short-term leases. How leases are recorded on the balance sheet represents a significant change from previous GAAP guidance as described in Accounting Standards Codification (“ASC”) Topic 840, Leases . ASU 2016-02 maintains a distinction between finance leases and operating leases similar to the distinction under previous lease guidance for capital leases and operating leases. ASU 2016-02 is effective for fiscal years beginning after December 15, 2018, and early adoption is permitted. Adoption of the new lease accounting standard will require the Partnership to apply the new standard to the earliest period using a modified retrospective approach. The Partnership is currently in the process of evaluating the impact of the new standard, including the evaluation of the impact, if any, on changes to business processes, systems and controls to support recognition and disclosure under the new guidance, however, at this time is unable to determine the impact this standard will have on the financial statements and related disclosures. In January 2016, the FASB issued ASU 2016-01, Financial Instruments - Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities which updates certain aspects of recognition, measurement, presentation and disclosure of financial instruments. This standard is effective for interim and annual periods beginning after December 15, 2017. We are currently evaluating the effect adopting this guidance will have on our consolidated financial statements and footnote disclosures. In May 2014, the FASB issued ASU 2014-09, Revenue from Contracts with Customers which was issued as a new Topic, ASC Topic 606. The new revenue recognition standard supersedes all existing revenue recognition guidance. Under this ASU, an entity should recognize revenue when it transfers promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. ASU 2015-14, issued in August 2015, deferred the effective date of ASU 2014-09 to the first quarter of 2018, with early adoption permitted in the first quarter of 2017. The Partnership intends to adopt the amended guidance as of January 1, 2018. In March, April, May, and December 2016, the FASB issued the following updates, respectively, to provide supplemental adoption guidance and clarification to ASU 2014-09. These standards must be adopted concurrently upon the adoption of ASU 2014-09. We are currently evaluating the potential effects of adopting the provisions of these updates. • ASU 2016-08, Revenue from Contracts with Customers: Principal versus Agent Considerations (Reporting Revenue Gross versus Net) . • ASU 2016-10, Revenue from Contracts with Customers: Identifying Performance Obligations and Licensing . • ASU 2016-12, Revenue from Contracts with Customers: Narrow-Scope Improvements and Practical Expedients . • ASU 2016-19, Technical Corrections and Improvements . We have established an implementation team to execute a multi-phase plan to adopt the requirements of the new standard. The team has finalized its conclusions on how the guidance will be applied to our coal sales contracts and the Partnership does not believe the implementation of the new standard will have a material impact on its consolidated financial statements. The team is continuing to evaluate the expanded disclosures required by the new standard and reviewing our system capabilities, processes, and internal controls over financial reporting to ensure the appropriate information will be available for these disclosures. Under the new standard, companies may use either of the following transition methods: (i) a full retrospective approach reflecting the application of the standard in each prior reporting period with the option to elect certain practical expedients; or (ii) a modified retrospective approach with the cumulative effect of initially adopting ASU 2014-09 recognized at the date of adoption (which includes additional footnote disclosures). We will be adopting the standard under the full retrospective approach.

Inventories (Tables)

Inventories (Tables)	9 Months Ended
	Sep. 30, 2017
Inventory Disclosure [Abstract]
Schedule of Inventories	Inventories consisted of the following: September 30, 2017 December 31, 2016 (In thousands) Coal stockpiles $ 4,217 $ 4,518 Materials and supplies 10,781 13,091 Reserve for obsolete inventory (50 ) (50 ) Total $ 14,948 $ 17,559

Restricted Investments (Tables)

Restricted Investments (Tables)	9 Months Ended
	Sep. 30, 2017
Investments, Debt and Equity Securities [Abstract]
Schedule of Carrying Value and Fair Value of Restricted Investments	The carrying value and estimated fair value of our restricted investments were as follows: September 30, 2017 December 31, 2016 (In thousands) Cash and cash equivalents $ 7,994 $ 8,581 Available-for-sale securities 31,214 29,160 $ 39,208 $ 37,741
Summary of Cost, Unrealized Gains and Losses, and Fair Value	The cost basis, gross unrealized holding gains and losses and fair value of available-for-sale securities were as follows: September 30, 2017 December 31, 2016 (In thousands) Cost basis $ 31,050 $ 29,349 Gross unrealized holding gains 431 167 Gross unrealized holding losses (267 ) (356 ) Fair value $ 31,214 $ 29,160

Debt and Lines of Credit (Table

Debt and Lines of Credit (Tables)	9 Months Ended
	Sep. 30, 2017
Disclosure Text Block [Abstract]
Schedule of Long-Term Debt	Debt consisted of the following: September 30, 2017 December 31, 2016 (In thousands) Term Loan $ 311,628 $ 306,189 Capital lease obligations 14,407 16,351 Other 430 589 Total debt outstanding 326,465 323,129 Less debt issuance costs (3,445 ) (5,483 ) Less current installments (4,220 ) (3,819 ) Total debt outstanding, less current installments $ 318,800 $ 313,827
Schedule of Maturities of Long-term Debt	The following table presents remaining aggregate contractual debt maturities of all long-term debt: September 30, 2017 (In thousands) 2017 $ 1,660 2018 315,804 2019 4,105 2020 1,694 2021 1,586 Thereafter 1,616 Total debt $ 326,465

Distribution of Available Cash

Distribution of Available Cash Distribution of Available Cash (Tables)	9 Months Ended
	Sep. 30, 2017
Equity [Abstract]
Schedule of Distribution of Available Cash	We made cash distributions as follows (in thousands): Three Months Ended September 30, Nine Months Ended September 30, 2017 2016 2017 2016 Limited partner common units $ 171 $ 1,148 $ 505 $ 3,438 Series A convertible units — 3,132 — 6,263 General partner units 5 8 15 23 Warrants 22 33 66 99

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	9 Months Ended
	Sep. 30, 2017
Fair Value Disclosures [Abstract]
Schedule of Carrying Values and Estimated Fair Values of Debt Instruments	The estimated fair values of the Partnership’s debt with fixed and variable interest rates are as follows: Fixed Interest Rate Variable Interest Rate Carrying Value Fair Value Carrying Value Fair Value (In thousands) September 30, 2017 $ 14,837 $ 14,837 $ 308,183 $ 210,349 December 31, 2016 16,940 16,940 300,706 277,867

Unit-based Compensation (Tables

Unit-based Compensation (Tables)	9 Months Ended
	Sep. 30, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Schedule of Recognized Compensation Expense	We recognized compensation expense from unit-based arrangements as shown in the following table: Three Months Ended September 30, Nine Months Ended September 30, 2017 2016 2017 2016 (In thousands) Recognition of fair value of restricted common units over the vesting period $ 83 $ 63 $ 164 $ 190
Summary of Restricted Common Unit Award Activity	A summary of restricted common unit award activity for the nine months ended September 30, 2017 is as follows: Units Weighted Average Grant-Date Fair Value Unamortized Compensation Expense (In thousands) Unvested balance at December 31, 2016 63,780 $ 3.92 Granted 82,240 3.04 Vested (63,780 ) 3.92 Unvested balance at September 30, 2017 82,240 $ 3.04 $ 128

Partners' Capital and Convert28

Partners' Capital and Convertible Units (Tables)	9 Months Ended
	Sep. 30, 2017
Earnings Per Share [Abstract]
Schedule of Capital Unit	Outstanding Units September 30, 2017 December 31, 2016 Limited partner common units 1,284,840 1,221,060 Series A convertible units 16,793,429 15,656,551 Series B convertible units 4,512,500 4,512,500 Liquidation units 856,698 856,698 Warrants 166,557 166,557 General partner units 35,291 35,291
Computation of Basic and Diluted Earnings (Losses) per Unit	We determined basic and diluted limited partners’ net loss per common unit as follows (in thousands, except per unit amounts): Three Months Ended September 30, Nine Months Ended September 30, 2017 2016 2017 2016 Net loss attributable to the Partnership $ (1,360 ) $ (4,276 ) $ (12,528 ) $ (27,557 ) Less: Paid and declared distributions on Series A convertible units 1,940 2,087 6,302 8,349 Series A convertible units share of undistributed loss (2,573 ) (4,789 ) (14,311 ) (28,106 ) Series B convertible units share of undistributed loss (695 ) — (3,947 ) — Paid and declared distributions on General Partner units 4 8 14 23 General Partner units share of undistributed loss (6 ) (11 ) (31 ) (63 ) Paid and declared distributions on Warrants 19 22 63 88 Net loss available to limited partners $ (49 ) $ (1,593 ) $ (618 ) $ (7,848 ) Weighted average number of common units used in computation of Limited Partners' net loss per common unit (basic and diluted) 1,285 5,900 1,271 5,895 Limited Partners' net loss per common unit (basic and diluted) $ (0.04 ) $ (0.27 ) $ (0.49 ) $ (1.33 )

Accumulated Other Comprehensi29

Accumulated Other Comprehensive Income (loss) (Tables)	9 Months Ended
	Sep. 30, 2017
Equity [Abstract]
Schedule of Changes in Accumulated Other Comprehensive Income (Loss)	The following table reflects the changes in accumulated other comprehensive income (loss) arising from our available-for-sale securities (net of tax): Accumulated Other Comprehensive Income (Loss) (In thousands) Balance at December 31, 2016 $ (189 ) Other comprehensive income before reclassification 362 Amounts reclassified from accumulated other comprehensive loss (9 ) Balance at September 30, 2017 $ 164
Reclassifications out of Accumulated Other Comprehensive Income (Loss)	The following table reflects the reclassifications out of accumulated other comprehensive income (loss) for the three and nine months ended September 30, 2017 : Amount reclassified from accumulated other comprehensive income (loss) Affected line item in the statements where presented Details about accumulated other comprehensive income (loss) components Three Months Ended September 30, 2017 Nine Months Ended September 30, 2017 (In thousands) Realized gains on available-for-sale securities $ (23 ) $ (9 ) Other income

Inventories (Details)

Inventories (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Inventory Disclosure [Abstract]
Coal stockpiles	$ 4,217	$ 4,518
Materials and supplies	10,781	13,091
Reserve for obsolete inventory	(50)	(50)
Total	$ 14,948	$ 17,559

Restricted Investments - Carryi

Restricted Investments - Carrying Value and Fair Value (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available-for-sale securities	$ 31,214	$ 29,160
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	7,994	8,581
Available-for-sale securities	31,214	29,160
Restricted Cash and Investments	$ 39,208	$ 37,741

Restricted Investments - Value

Restricted Investments - Value of Available for Sale Securities (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Investments, Debt and Equity Securities [Abstract]
Cost basis	$ 31,050	$ 29,349
Gross unrealized holding gains	431	167
Gross unrealized holding losses	(267)	(356)
Available-for-sale securities	$ 31,214	$ 29,160

Impairment Charges - Schedule o

Impairment Charges - Schedule of Charges Incurred (Details) $ in Millions	1 Months Ended	3 Months Ended		9 Months Ended
	Apr. 30, 2016T	Sep. 30, 2016USD ($)	Jun. 30, 2016USD ($)	Sep. 30, 2017USD ($)
Restructuring and Related Activities [Abstract]
Agreement to purchase coal (tons) | T	1,000,000
Severance charge			$ 0.3
Impairment charge		$ 3.2	$ 4.2	$ 0

Debt and Lines of Credit - Sche

Debt and Lines of Credit - Schedule (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Debt Instrument [Line Items]
Long-term debt	$ 326,465	$ 323,129
Less debt issuance costs	(3,445)	(5,483)
Less current installments	(4,220)	(3,819)
Total debt outstanding, less current installments	318,800	313,827
Capital lease obligations [Member]
Debt Instrument [Line Items]
Long-term debt	14,407	16,351
Other [Member]
Debt Instrument [Line Items]
Long-term debt	430	589
Term Loan [Member]
Debt Instrument [Line Items]
Long-term debt	$ 311,628	$ 306,189

Debt and Lines of Credit - Debt

Debt and Lines of Credit - Debt Maturities (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Maturities of Long-term Debt [Abstract]
2,017	$ 1,660
2,018	315,804
2,019	4,105
2,020	1,694
2,021	1,586
Thereafter	1,616
Long-term Debt	$ 326,465	$ 323,129

Debt and Lines of Credit - Cred

Debt and Lines of Credit - Credit Facilities (Details)	Dec. 31, 2014	Sep. 30, 2017USD ($)	Sep. 30, 2017USD ($)	Sep. 30, 2016USD ($)	Dec. 31, 2016USD ($)	Jul. 31, 2015USD ($)
Line of Credit Facility [Line Items]
Principal balance		$ 326,465,000	$ 326,465,000		$ 323,129,000
Repayments of debt			3,645,000	$ 3,171,000
Term Loan [Member]
Line of Credit Facility [Line Items]
Principal balance		311,628,000	311,628,000		$ 306,189,000
Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity		15,000,000	15,000,000
Line of credit facility, remaining borrowing capacity		14,800,000	14,800,000
Letter of Credit [Member]
Line of Credit Facility [Line Items]
Line of credit facility, remaining borrowing capacity		$ 10,000,000	$ 10,000,000
Financing Agreement 2014 [Member]
Line of Credit Facility [Line Items]
Maximum capacity to make distributions						$ 15,000,000
Consolidated Total Net Leverage ratio (more than)		3.75	3.75			3.75
Fixed Charge Coverage ratio (less than)						1
Minimum liquidity requirement						$ 7,500,000
Financing Agreement 2014 [Member] | Secured Debt [Member]
Line of Credit Facility [Line Items]
Principal balance		$ 288,600,000	$ 288,600,000
Fixed portion of the effective rate			8.50%
Interest rate, effective percentage		9.80%	9.80%
Paid-in-kind interest		$ 2,300,000	$ 7,000,000
PIK interest payable		$ 23,100,000	$ 23,100,000
Financing Agreement 2014 [Member] | Secured Debt [Member] | Minimum [Member]
Line of Credit Facility [Line Items]
Basis spread on variable rate, paid-in-kind	1.00%
Financing Agreement 2014 [Member] | Secured Debt [Member] | Maximum [Member]
Line of Credit Facility [Line Items]
Basis spread on variable rate, paid-in-kind	3.00%
Financing Agreement 2014 [Member] | Secured Debt [Member] | London Interbank Offered Rate (LIBOR) [Member]
Line of Credit Facility [Line Items]
Basis spread on variable rate			0.75%
Interest rate, effective percentage		1.30%	1.30%
First Lien Financing Agreement [Member] | Term Loan [Member]
Line of Credit Facility [Line Items]
Repayments of debt		$ 300,000	$ 1,500,000
2014 Financing Agreement and Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Payments of capital distribution			$ 14,800,000

Distribution of Available Cas37

Distribution of Available Cash (Details) - USD ($) $ / shares in Units, $ in Thousands	Nov. 14, 2017	Oct. 27, 2017	Jul. 28, 2017	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Class of Stock [Line Items]
Distribution of available cash (percent)						100.00%
Post-quarter period for distribution of available cash						45 days
Warrant [Member]
Class of Stock [Line Items]
Quarterly distribution to unit holders				$ 22	$ 33	$ 66	$ 99
Limited Partner [Member] | Common units [Member]
Class of Stock [Line Items]
Quarterly distribution to unit holders				171	1,148	505	3,438
General Partner [Member]
Class of Stock [Line Items]
Quarterly distribution to unit holders				5	8	15	23
Series A Convertible Units [Member]
Class of Stock [Line Items]
Distribution declared (dollars per unit)			$ 0.1333
Series A Convertible Units [Member] | Limited Partner [Member]
Class of Stock [Line Items]
Quarterly distribution to unit holders				0	$ 3,132	0	$ 6,263
Subsequent Event [Member] | Common units [Member]
Class of Stock [Line Items]
Distribution declared (dollars per unit)		$ 0.1155
Subsequent Event [Member] | Series A Convertible Units [Member]
Class of Stock [Line Items]
Distribution declared (dollars per unit)		0.1155
Decrease in distribution (dollars per unit)		$ 0.0178
Scenario, Forecast [Member]
Class of Stock [Line Items]
Quarterly distribution to unit holders	$ 200
2014 Financing Agreement and Revolving Credit Facility [Member]
Class of Stock [Line Items]
Debt covenant, cash distribution limit when certain ratios and liquidity requirements are not met				$ 15,000
Payments of capital distribution						$ 14,800

Fair Value Measurements (Detail

Fair Value Measurements (Details) - Fair Value, Inputs, Level 1 [Member] - Warrant [Member]	Sep. 30, 2017$ / shares$ / item
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair value of each warrant	$ 2.85
Fair value assumption, spot price per unit | $ / item	2.97
Fair value assumption, exercise price per unit	$ 0.12

Fair Value Measurements - Carry

Fair Value Measurements - Carrying Value and Fair Value of Debt (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Fair Value Disclosures [Abstract]
Fixed-rate debt, carrying value	$ 14,837	$ 16,940
Fixed-rate debt, fair value	14,837	16,940
Variable-rate debt, carrying value	308,183	300,706
Variable-rate debt, fair value	$ 210,349	$ 277,867

Unit-based Compensation - Sched

Unit-based Compensation - Schedule of Compensation Expense (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Recognition of fair value of restricted common units over the vesting period	$ 83	$ 63	$ 164	$ 190

Unit-based Compensation - Summa

Unit-based Compensation - Summary of Restricted Common Units (Details) - Restricted Stock Units (RSUs) [Member] $ / shares in Units, $ in Thousands	9 Months Ended
	Sep. 30, 2017USD ($)$ / sharesshares
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Non-vested at the beginning of the period (in units) | shares	63,780
Granted (in units) | shares	82,240
Vested (in units) | shares	(63,780)
Non-vested at the end of the period (in units) | shares	82,240
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Non-vested at the beginning of the period (in dollars per unit) | $ / shares	$ 3.92
Granted (in dollars per unit) | $ / shares	3.04
Vested (in dollars per unit) | $ / shares	3.92
Non-vested at the end of the period (in dollars per unit) | $ / shares	$ 3.04
Unamortized Compensation Expense (In thousands) | $	$ 128

Commitments and Contingencies (

Commitments and Contingencies (Details) - T	1 Months Ended	9 Months Ended	18 Months Ended
	Apr. 30, 2016	Sep. 30, 2017	Sep. 30, 2017
Loss Contingencies [Line Items]
Agreement to purchase coal (tons)	1,000,000
Coal purchased to date under agreement (tons)			900,000
Minimum [Member]
Loss Contingencies [Line Items]
Remaining terms of long-term contract		1 year
Maximum [Member]
Loss Contingencies [Line Items]
Remaining terms of long-term contract		9 years

Partners' Capital and Convert43

Partners' Capital and Convertible Units - Additional Information (Details)	9 Months Ended
	Sep. 30, 2017$ / sharesshares	Dec. 31, 2016shares	Oct. 28, 2016shares
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
General partner interest (percent)	0.15%
Limited partner interest (percent)	99.85%
Liquidation units	166,557	166,557
Series A Convertible Units [Member]
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Partnership unit, conversion ratio into common units	1
Minimum quarterly distribution, amount per common unit (in USD per unit) | $ / shares	$ 0.22
Series B Convertible Units [Member]
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Partnership unit, conversion ratio into common units	1
Partnership units issued to WCC (in units)			4,512,500
Common units [Member]
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Limited partnership units converted (in units)			4,512,500
Warrant [Member] | Fair Value, Inputs, Level 1 [Member]
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Fair value assumption, exercise price per unit | $ / shares	$ 0.12

Partners' Capital and Convert44

Partners' Capital and Convertible Units - Outstanding Units (Details) - shares	Sep. 30, 2017	Dec. 31, 2016
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Limited partner capital account, units outstanding	1,284,840	1,221,060
Liquidation units	166,557	166,557
General partner capital account, units outstanding	35,291	35,291
Limited Partner [Member]
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Limited partner common units	23,447,467	22,246,809
Common Units [Member]
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Limited partner common units	1,284,840	1,221,060
Common Units [Member] | Limited Partner [Member]
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Limited partner common units	1,284,840	1,221,060
Liquidation [Member] | Limited Partner [Member]
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Limited partner common units	856,698	856,698
Series A Convertible Units [Member]
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Limited partner capital account, units outstanding	16,793,429	15,656,551
Series B Convertible Units [Member]
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Limited partner capital account, units outstanding	4,512,500	4,512,500

Partners' Capital and Convert45

Partners' Capital and Convertible Units - Computation (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Preferred Units [Line Items]
Net loss attributable to the Partnership	$ (1,360)	$ (4,276)	$ (12,528)	$ (27,557)
Distributions Paid, Series A Convertible Units	(1,940)	(2,087)	(6,302)	(8,349)
Series A convertible units share of undistributed loss	2,573	4,789	14,311	28,106
Series B convertible units share of undistributed loss	(695)	0	(3,947)	0
Paid and declared distributions on General Partner units	4	8	14	23
General Partner units share of undistributed loss	(6)	(11)	(31)	(63)
Paid and declared distributions on Series B convertible units	19	22	63	88
Net loss available to limited partners	$ (49)	$ (1,593)	$ (618)	$ (7,848)
Common units [Member]
Preferred Units [Line Items]
Weighted average units outstanding basic and diluted (in units)	1,285	5,900	1,271	5,895
Limited Partners' net loss per common unit (basic and diluted) (in dollars per share)	$ (0.04)	$ (0.27)	$ (0.49)	$ (1.33)

Accumulated Other Comprehensi46

Accumulated Other Comprehensive Income (loss) - Changes by Components (Details) - Accumulated Other Comprehensive Income (Loss) [Member] $ in Thousands	9 Months Ended
	Sep. 30, 2017USD ($)
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	$ (189)
Other comprehensive income before reclassification	362
Amounts reclassified from accumulated other comprehensive income	(9)
Ending balance	$ 164

Accumulated Other Comprehensi47

Accumulated Other Comprehensive Income (loss) - Reclassifications (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Other income	$ (10,811)	$ (10,236)	$ (30,852)	$ (30,044)
Accumulated Net Investment Gain (Loss) Attributable to Parent [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Other income	$ (23)		$ (9)

Related Party Transactions (Det

Related Party Transactions (Details) - USD ($) $ in Thousands	Jan. 09, 2017	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Related Party Transaction [Line Items]
Notice period for terminating service agreement				120 days
Prepaid Fees						$ 2,200
Automatic renewal of service agreement, renewal term				1 year
Accounts payable, related parties, current		$ 1,200		$ 1,200		$ 2,700
Acquisition of coal reserves				1,526	$ 0
Buckingham Coal Company, LLC [Member]
Related Party Transaction [Line Items]
Acquisition of coal reserves	$ 1,700
Subsidiary of Common Parent [Member] | Coal Revenue [Member]
Related Party Transaction [Line Items]
Revenue from related parties		3,200	$ 6,200	15,300	$ 20,500
Other Current Assets [Member]
Related Party Transaction [Line Items]
Prepaid Fees		$ 500		$ 500

Segment Information (Details)

Segment Information (Details)	9 Months Ended
	Sep. 30, 2017segment
Segment Reporting [Abstract]
Number of operating segments	1