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Reconciliation (Details) link:presentationLink link:calculationLink link:definitionLink 41701 - Disclosure - COMPONENTS OF PENSION PLAN NET PERIODIC BENEFIT COSTS (Details) link:presentationLink link:calculationLink link:definitionLink 41803 - Disclosure - SEGMENT INFORMATION - EBITDA Expense Reconciliation (Details) link:presentationLink link:calculationLink link:definitionLink 41804 - Disclosure - SEGMENT INFORMATION - EBITDA Reconciliation (Details) link:presentationLink link:calculationLink link:definitionLink 00090 - Document - Document and Entity Information link:presentationLink link:calculationLink link:definitionLink 00105 - Statement - CONSOLIDATED BALANCE SHEETS (Parenthetical) link:presentationLink link:calculationLink link:definitionLink 00205 - Statement - CONSOLIDATED STATEMENTS OF INCOME (Parenthetical) link:presentationLink link:calculationLink link:definitionLink 10401 - Disclosure - LONG-LIVED ASSET IMPAIRMENTS link:presentationLink link:calculationLink link:definitionLink 30303 - 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Disclosure - INVESTMENTS - Kodiak (Details) link:presentationLink link:calculationLink link:definitionLink 41201 - Disclosure - PARTNERS' CAPITAL - Distributions (Details) link:presentationLink link:calculationLink link:definitionLink 41202 - Disclosure - PARTNERS' CAPITAL - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 41203 - Disclosure - PARTNERS' CAPITAL - Change (Details) link:presentationLink link:calculationLink link:definitionLink 41301 - Disclosure - REVENUE FROM CONTRACTS WITH CUSTOMERS - Disaggregation of revenues (Details) link:presentationLink link:calculationLink link:definitionLink 41302 - Disclosure - REVENUE FROM CONTRACTS WITH CUSTOMERS - Coal supply contracts (Details) link:presentationLink link:calculationLink link:definitionLink 41302 - Disclosure - REVENUE FROM CONTRACTS WITH CUSTOMERS - Coal supply contracts Default (Details) link:presentationLink link:calculationLink link:definitionLink 41502 - Disclosure - WORKERS' COMPENSATION AND PNEUMOCONIOSIS - Periodic Benefit Cost (Details) link:presentationLink link:calculationLink link:definitionLink 41601 - Disclosure - COMPENSATION PLANS - LTIP Grants Activity (Details) link:presentationLink link:calculationLink link:definitionLink 41602 - Disclosure - COMPENSATION PLANS - LTIP Other Information (Details) link:presentationLink link:calculationLink link:definitionLink 41603 - Disclosure - COMPENSATION PLANS - SERP and Directors Compensation Activity (Details) link:presentationLink link:calculationLink link:definitionLink 41802 - Disclosure - SEGMENT INFORMATION - Segment Results (Details) link:presentationLink link:calculationLink link:definitionLink 41901 - Disclosure - SUBSEQUENT EVENTS (Details) link:presentationLink link:calculationLink link:definitionLink 10101 - Disclosure - ORGANIZATION AND PRESENTATION link:presentationLink link:calculationLink link:definitionLink 10201 - Disclosure - NEW ACCOUNTING STANDARDS link:presentationLink link:calculationLink link:definitionLink 10301 - Disclosure - ACQUISITIONS link:presentationLink link:calculationLink link:definitionLink 10501 - Disclosure - GOODWILL link:presentationLink link:calculationLink link:definitionLink 10601 - Disclosure - CONTINGENCIES link:presentationLink link:calculationLink link:definitionLink 10701 - Disclosure - INVENTORIES link:presentationLink link:calculationLink link:definitionLink 10801 - Disclosure - FAIR VALUE MEASUREMENTS link:presentationLink link:calculationLink link:definitionLink 10901 - Disclosure - LONG-TERM DEBT link:presentationLink link:calculationLink link:definitionLink 11001 - Disclosure - VARIABLE INTEREST ENTITIES link:presentationLink link:calculationLink link:definitionLink 11101 - Disclosure - INVESTMENTS link:presentationLink link:calculationLink link:definitionLink 11201 - Disclosure - PARTNERS' CAPITAL link:presentationLink link:calculationLink link:definitionLink 11301 - Disclosure - REVENUE FROM CONTRACTS WITH CUSTOMERS link:presentationLink link:calculationLink link:definitionLink 11401 - Disclosure - EARNINGS PER LIMITED PARTNER UNIT link:presentationLink link:calculationLink link:definitionLink 11501 - Disclosure - WORKERS' COMPENSATION AND PNEUMOCONIOSIS link:presentationLink link:calculationLink link:definitionLink 11601 - Disclosure - COMPENSATION PLANS link:presentationLink link:calculationLink link:definitionLink 11701 - Disclosure - COMPONENTS OF PENSION PLAN NET PERIODIC BENEFIT COSTS link:presentationLink link:calculationLink link:definitionLink 11801 - Disclosure - SEGMENT INFORMATION link:presentationLink link:calculationLink link:definitionLink 11901 - Disclosure - SUBSEQUENT EVENTS link:presentationLink link:calculationLink link:definitionLink 20102 - Disclosure - ORGANIZATION AND PRESENTATION (Policies) link:presentationLink link:calculationLink link:definitionLink 30703 - Disclosure - INVENTORIES (Tables) link:presentationLink link:calculationLink link:definitionLink 30803 - Disclosure - FAIR VALUE MEASUREMENTS (Tables) link:presentationLink link:calculationLink link:definitionLink 30903 - Disclosure - LONG-TERM DEBT (Tables) link:presentationLink link:calculationLink link:definitionLink 31003 - Disclosure - VARIABLE INTEREST ENTITIES (Tables) link:presentationLink link:calculationLink link:definitionLink 31203 - Disclosure - PARTNERS' CAPITAL (Tables) link:presentationLink link:calculationLink link:definitionLink 31303 - Disclosure - REVENUE FROM CONTRACTS WITH CUSTOMERS (Tables) link:presentationLink link:calculationLink link:definitionLink 31803 - Disclosure - SEGMENT INFORMATION (Tables) link:presentationLink link:calculationLink link:definitionLink 41501 - Disclosure - WORKERS' COMPENSATION AND PNEUMOCONIOSIS - Workers' Compensation Liability (Detail) link:presentationLink link:calculationLink link:definitionLink 41801 - Disclosure - SEGMENT INFORMATION - General (Details) link:presentationLink link:calculationLink link:definitionLink