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CONSOLIDATED STATEMENTS OF INCOME - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
SALES AND OPERATING REVENUES:
Revenues	$ 255,202	$ 517,054	$ 605,965	$ 1,043,656
EXPENSES:
Operating expenses (excluding depreciation, depletion and amortization)	187,164	314,273	421,506	617,001
Outside coal purchases		5,311		5,311
General and administrative	13,822	19,521	27,260	37,333
Depreciation, depletion and amortization	83,559	76,913	157,480	148,052
Asset impairments			24,977
Goodwill impairment			132,026
Total operating expenses	290,302	448,648	773,745	870,565
INCOME (LOSS) FROM OPERATIONS	(35,100)	68,406	(167,780)	173,091
Interest expense (net of interest capitalized for the three and six months ended June 30, 2020 and 2019 of $509, $238, $1,066 and $492, respectively)	(11,446)	(10,711)	(23,725)	(22,133)
Interest income	30	138	82	229
Equity method investment income	137	550	588	874
Equity securities income				12,906
Acquisition gain				177,043
Other expense	(377)	(13)	(733)	(142)
INCOME (LOSS) BEFORE INCOME TAXES	(46,756)	58,370	(191,568)	341,868
INCOME TAX EXPENSE (BENEFIT)	(77)	186	(182)	80
NET INCOME (LOSS)	(46,679)	58,184	(191,386)	341,788
LESS: NET LOSS (INCOME) ATTRIBUTABLE TO NONCONTROLLING INTEREST	15	(114)	(61)	(7,290)
NET INCOME (LOSS) ATTRIBUTABLE TO ARLP	$ (46,664)	$ 58,070	$ (191,447)	$ 334,498
EARNINGS PER LIMITED PARTNER UNIT - BASIC AND DILUTED	$ (0.37)	$ 0.44	$ (1.51)	$ 2.57
WEIGHTED-AVERAGE NUMBER OF UNITS OUTSTANDING - BASIC AND DILUTED	127,195,219	128,391,191	127,133,764	128,271,158
Coal sales
SALES AND OPERATING REVENUES:
Revenues	$ 236,286	$ 461,310	$ 550,923	$ 937,326
EXPENSES:
Operating expenses (excluding depreciation, depletion and amortization)	187,164	314,273	421,506	617,001
Oil & gas royalties
SALES AND OPERATING REVENUES:
Revenues	7,786	11,892	22,025	22,285
Transportation revenues
SALES AND OPERATING REVENUES:
Revenues	5,757	32,630	10,496	62,868
EXPENSES:
Transportation expenses	5,757	32,630	10,496	62,868
Other revenues
SALES AND OPERATING REVENUES:
Revenues	$ 5,373	$ 11,222	$ 22,521	$ 21,177

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