15. SEGMENT INFORMATION

Segment information is based on a management approach, which requires segmentation based upon the Company’s internal organization and reporting. The Company’s operations for the six months ended June 30, 2018 were classified into five reporting segments: Coal - U.S., Coal - Canada, Coal - WMLP, Heritage and Corporate. The Company's operations for the six months ended June 30, 2017 included the aforementioned reporting segments as well as our previously existing Power segment, however, during the fourth quarter of 2017 we sold all of the assets that comprised this Power operating segment and terminated all related power agreements. For a detailed description of the Company’s operations segmentation, please see our 2017 Form 10-K. Summarized financial information by segment is as follows:



	Coal - U.S.⁽¹⁾			Coal - Canada			Coal - WMLP⁽¹⁾			Power			Heritage			Corporate			Consolidated
	(In thousands)
Three Months Ended June 30, 2018
Revenues	$	102,492		$	109,525		$	64,295		$	—		$	—		$	—		$	276,312
Depreciation, depletion, and amortization	10,007			7,186			9,189			—			—			14			26,396
Operating income (loss)	(65,529		)	14,847			(82,471		)	—			(1,287		)	(23,545		)	(157,985		)
Total assets	715,274			461,676			236,770			—			17,583			26,292			1,457,595
Cash paid for capital expenditures	892			3,088			1,629			—			—			—			5,609
Three Months Ended June 30, 2017
Revenues	$	145,642		$	89,033		$	81,052		$	19,880		$	—		$	(8,293	)	$	327,314
Depreciation, depletion, and amortization	22,644			6,782			10,111			—			—			(40		)	39,497
Operating income (loss)	(1,247		)	(12,078		)	7,588			(383		)	(1,474		)	(5,448		)	(13,042		)
Total assets	770,754			435,820			370,936			64,269			16,699			11,741			1,670,219
Cash paid for capital expenditures	1,961			1,956			1,977			—			—			—			5,894
Six Months Ended June 30, 2018
Revenues	$	221,090		$	218,797		$	132,102		$	—		$	—		$	—		$	571,989
Depreciation, depletion, and amortization	20,344			14,704			17,354			—			—			29			52,431
Operating income (loss)	(56,394		)	33,947			(84,468		)	—			(2,514		)	(38,129		)	(147,558		)
Total assets	715,274			461,676			236,770			—			17,583			26,292			1,457,595
Cash paid for capital expenditures	1,643			6,979			3,151			—			—			—			11,773
Six Months Ended June 30, 2017
Revenues	$	288,100		$	200,233		$	155,857		$	41,107		$	—		$	(10,971	)	$	674,326
Depreciation, depletion, and amortization	38,643			17,036			20,461			—			—			(76		)	76,064
Operating income (loss)	8,991			(17,052		)	8,870			(1,136		)	(2,833		)	(9,955		)	(13,115		)
Total assets	770,754			435,820			370,936			64,269			16,699			11,741			1,670,219
Cash paid for capital expenditures	3,856			4,050			5,198			—			—			—			13,104

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(1)	The Coal - WMLP segment recorded revenues of $8.3 million and $11.0 million for intersegment revenues to the Coal - U.S. segment for the three and six months ended June 30, 2017, respectively. No such revenues occurred during the three and six months ended June 30, 2018. Eliminations for intersegment revenues and cost of sales are presented within the Corporate segment.

Disaggregated Revenues

The following table presents our revenues for the three and six months ended June 30, 2018 disaggregated by type of revenue for each segment (in thousands):



	Three Months Ended June 30, 2018
	Coal - U.S.		Coal - Canada		Coal - WMLP
Domestic coal sales	$	101,099	$	68,232	$	60,032
Export coal sales	—		40,684		—
Other revenues	1,393		609		4,263
Total	$	102,492	$	109,525	$	64,295

	Six Months Ended June 30, 2018
	Coal - U.S.		Coal - Canada		Coal - WMLP
Domestic coal sales	$	217,501	$	148,500	$	126,741
Export coal sales	—		69,271		—
Other revenues	3,589		1,026		5,361
Total	$	221,090	$	218,797	$	132,102

The following table presents our revenues for the three and six months ended June 30, 2017 disaggregated by type of revenue for each segment (in thousands):



	Three Months Ended June 30, 2017
	Coal - U.S.		Coal - Canada		Coal - WMLP		Power
Domestic coal sales	$	134,558	$	67,468	$	79,817	$	—
Export coal sales	—		21,383		—		—
Power revenues	—		—		—		19,880
Other revenues	2,791		182		1,235		—
Total	$	137,349	$	89,033	$	81,052	$	19,880

	Six Months Ended June 30, 2017
	Coal - U.S.		Coal - Canada		Coal - WMLP		Power
Domestic coal sales	$	272,884	$	143,395	$	152,925	$	—
Export coal sales	—		56,163		—		—
Power revenues	—		—		—		41,107
Other revenues	4,245		675		2,932		—
Total	$	277,129	$	200,233	$	155,857	$	41,107