Equity Investments (Tables)

12 Months Ended

Dec. 31, 2020

Equity Method Investments and Joint Ventures [Abstract]

Schedule of investments accounted for by the equity method

Investments accounted for by the equity method consist of the following as of December 31, 2020 and 2019:


			Carrying Value				Loss (income) from equity method investments
	Approximate Ownership %		December 31,				For the Year Ended December 31,
			2020		2019		2020		2019		2018
			(In thousands)
Investment in Grizzly Oil Sands ULC	24.5	%	$	24,816	$	21,000	$	377	$	32,710	$	510
Investment in Mammoth Energy Services, Inc.	21.5	%	—		11,005		10,646		179,524		(49,969)
Investment in Tatex Thailand II, LLC	23.5	%	—		—		—		(2,086)		(241)
Other equity investments(1)	—	%	—		39		32		—		(204)


			$	24,816	$	32,044	$	11,055	$	210,148	$	(49,904)

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(1) Consists of sold/dissolved investments, including Windsor Midstream, LLC, which was dissolved as of December 31, 2020. Additionally, this includes the Company's investment in Strike Force that was sold in 2018, from which the Company recognized a gain of $96.4 million net of transaction fees, which is included in gain on sale of equity method investments in the accompanying consolidated statement of operations for the year ended December 31, 2018.

Schedule of Equity Investments - Balance Sheet

Summarized balance sheet information:


	December 31,
	2020		2019
	(In thousands)
Current assets	$	483,303	$	421,326
Noncurrent assets	$	1,092,495	$	1,260,075
Current liabilities	$	132,978	$	132,569
Noncurrent liabilities	$	148,240	$	163,241

Schedule of Equity Investments - Income Statement

Summarized results of operations:


	December 31,
	2020		2019		2018
	(In thousands)
Gross revenue	$	313,076	$	625,012	$	1,729,778
Net (loss) income	$	(106,072)	$	(76,523)	$	253,451