Segment Information (Tables)

12 Months Ended

Dec. 31, 2018

Segment Reporting [Abstract]

Schedule of Segment Reporting Information, by Segment

The following table summarizes certain financial information for each of the Partnership's business segments:

	Operating Segments
(In thousands)	Coal Royalty and Other		Soda Ash		Corporate and Financing			Total
For the Year Ended December 31, 2018
Revenues (including affiliates)	$	202,765	$	48,306	$	—		$	251,071
Gain on litigation settlement	25,000		—		—			25,000
Gain on asset sales, net	2,441		—		—			2,441
Operating and maintenance expenses (including affiliates)	29,509		—		—			29,509
Depreciation, depletion and amortization	21,689		—		—			21,689
General and administrative (including affiliates)	—		—		16,496			16,496
Asset impairments	18,280		—		—			18,280
Other expense, net	—		—		70,178			70,178
Net income (loss) from continuing operations	160,728		48,306		(86,674		)	122,360
Net income from discontinued operations	—		—		—			17,687
As of December 31, 2018
Total assets of continuing operations	$	986,680	$	247,051	$	106,923		$	1,340,654
Total assets of discontinued operations	—		—		—			993
For the Year Ended December 31, 2017
Revenues (including affiliates)	$	202,323	$	40,457	$	—		$	242,780
Gain on asset sales, net	3,545		—		—			3,545
Operating and maintenance expenses (including affiliates)	24,883		—		—			24,883
Depreciation, depletion and amortization (including affiliates)	23,414		—		—			23,414
General and administrative (including affiliates)	—		—		18,502			18,502
Asset impairments	2,967		—		—			2,967
Other expense, net	—		—		94,074			94,074
Net income (loss) from continuing operations	154,604		40,457		(112,576		)	82,485
Net income from discontinued operations	—		—		—			6,182
As of December 31, 2017
Total assets of continuing operations	$	945,237	$	245,433	$	6,129		$	1,196,799
Total assets of discontinued operations	—		—		—			192,365
For the Year Ended December 31, 2016
Revenues (including affiliates)	$	210,115	$	40,061	$	—		$	250,176
Gain on asset sales, net	29,068		—		—			29,068
Operating and maintenance expenses (including affiliates)	29,890		—		—			29,890
Depreciation, depletion and amortization (including affiliates)	31,766		—		—			31,766
General and administrative (including affiliates)	—		—		20,570			20,570
Asset impairments	15,861		—		—			15,861
Other expense, net	—		—		90,531			90,531
Net income (loss) from continuing operations	161,666		40,061		(111,101		)	90,626
Net income from discontinued operations	—		—		—			6,266
Capital expenditures	5		—		—			5