EQUITY INVESTMENTS (Tables)

12 Months Ended

Dec. 31, 2016

AllDale Minerals

Equity Investments

Schedule of changes in the ARLP Partnership's equity investment

	Year Ended December 31,
	2016		2015		2014
	(in thousands)
Beginning balance	$	64,509	$	11,257	$	—
Contributions		76,797		54,290		11,626
Equity in income (loss) of affiliates		3,543		(594)		(369)
Distributions received		(6,032)		(444)		—
Ending balance	$	138,817	$	64,509	$	11,257

White Oak

Equity Investments

Summary of White Oak's results prior to the Hamilton Acquisition

	January 1, 2015		December 31,
	to July 31, 2015		2014
	(in thousands)
Total revenues	$	108,256		$	42,748
Gross loss		(2,919)			(1,134)
Loss from operations		(38,148)			(21,018)
Net loss		(69,075)			(46,324)