CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
CURRENT ASSETS:
Cash and cash equivalents	$ 29,623	$ 36,482
Trade receivables	137,261	161,679
Other receivables	322	256
Inventories, net	124,516	101,305
Advance royalties	1,085	1,844
Prepaid expenses and other assets	14,685	18,019
Total current assets	307,492	319,585
PROPERTY, PLANT AND EQUIPMENT:
Property, plant and equipment, at cost	3,621,062	3,684,008
Less accumulated depreciation, depletion and amortization	(1,662,335)	(1,675,022)
Total property, plant and equipment, net	1,958,727	2,008,986
OTHER ASSETS:
Advance royalties	59,626	52,057
Equity method investments	28,114	28,529
Goodwill	4,373	136,399
Operating lease right-of-use assets	16,334	17,660
Other long-term assets	21,755	23,478
Total other assets	130,202	258,123
TOTAL ASSETS	2,396,421	2,586,694
CURRENT LIABILITIES:
Accounts payable	63,107	80,566
Accrued taxes other than income taxes	21,598	15,768
Accrued payroll and related expenses	35,718	36,575
Accrued interest	13,037	5,664
Workers' compensation and pneumoconiosis benefits	11,175	11,175
Current finance lease obligations	7,043	8,368
Current operating lease obligations	2,264	3,251
Other current liabilities	21,687	21,062
Current maturities, long-term debt, net	71,727	13,157
Total current liabilities	247,356	195,586
LONG-TERM LIABILITIES:
Long-term debt, excluding current maturities, net	731,004	768,194
Pneumoconiosis benefits	95,089	94,389
Accrued pension benefit	43,361	44,858
Workers' compensation	44,999	45,503
Asset retirement obligations	135,232	133,018
Long-term finance lease obligations	2,039	2,224
Long-term operating lease obligations	13,991	14,316
Other liabilities	15,846	23,182
Total long-term liabilities	1,081,561	1,125,684
Total liabilities	1,328,917	1,321,270
ARLP Partners' Capital:
Limited Partners - Common Unitholders 127,195,219 and 126,915,597 units outstanding, respectively	1,132,836	1,331,482
Accumulated other comprehensive loss	(77,055)	(77,993)
Total ARLP Partners' Capital	1,055,781	1,253,489
Noncontrolling interest	11,723	11,935
Total Partners' Capital	1,067,504	1,265,424
TOTAL LIABILITIES AND PARTNERS' CAPITAL	$ 2,396,421	$ 2,586,694