Investments (Tables)

12 Months Ended

Dec. 31, 2020

The following table details our investment balances at December 31, 2020 and 2019 (in thousands):


	December 31,
	2020		2019
Joint ventures	$	604,964	$	534,430
Nonmarketable securities	14,171		11,746
Marketable equity securities	37,109		33,637
Total	$	656,244	$	579,813

Ownership Positions in Significant Unconsolidated Investments

Our ownership positions in significant unconsolidated investments are shown below:


		December 31,
		2020		2019		2018
*	Windfield Holdings Pty. Ltd. - a joint venture with Sichuan Tianqi Lithium Industries, Inc., that mines lithium ore and produces lithium concentrate	49	%	49	%	49	%
*	Nippon Aluminum Alkyls - a joint venture with Mitsui Chemicals, Inc. that produces aluminum alkyls	50	%	50	%	50	%

*	Nippon Ketjen Company Limited - a joint venture with Sumitomo Metal Mining Company Limited that produces refinery catalysts	50	%	50	%	50	%
*	Eurecat S.A. - a joint venture with Axens Group for refinery catalysts regeneration services	50	%	50	%	50	%
*	Fábrica Carioca de Catalisadores S.A. - a joint venture with Petrobras Quimica S.A. - PETROQUISA that produces catalysts and includes catalysts research and product development activities	50	%	50	%	50	%

Summary of Assets, Liabilities and Results of Operations for Significant Unconsolidated Joint Ventures

The following summary lists the assets, liabilities and results of operations for our significant unconsolidated joint ventures presented herein (in thousands):


	December 31,
	2020		2019
Summary of Balance Sheet Information:
Current assets	$	449,441	$	473,426
Noncurrent assets	1,590,204		1,404,765
Total assets	$	2,039,645	$	1,878,191

Current liabilities	$	116,136	$	201,792
Noncurrent liabilities	769,114		583,839
Total liabilities	$	885,250	$	785,631


	Year Ended December 31,
	2020		2019		2018
Summary of Statements of Income Information:
Net sales	$	597,082	$	910,891	$	829,590
Gross profit	$	266,026	$	496,150	$	456,518
Income before income taxes	$	225,436	$	384,690	$	332,632
Net income	$	157,628	$	229,733	$	225,791