Investments (Tables)

12 Months Ended

Dec. 31, 2015

Investments [Abstract]

Investment Balances

The following table details our investment balances at December 31, 2015 and 2014 (in thousands).

	December 31,
	2015		2014
Joint ventures(a)	$	430,952	$	169,891
Nonmarketable securities	208		177
Marketable equity securities	24,257		23,974
Total	$	455,417	$	194,042

(a) Balance at December 31, 2015 excludes our investment in Magnifin Magnesiaprodukte GmbH & Co. KG (“Magnifin”), which is included in Assets held for sale. Refer to Note 3, “Divestitures.”

Ownership Positions in Significant Unconsolidated Investments

Our ownership positions in significant unconsolidated investments are shown below:

		December 31,
		2015		2014		2013
*	Windfield Holdings Pty Ltd - a joint venture with Sichuan Tianqi Lithium Industries, Inc., that mines lithium ore and produces lithium concentrate	49	%	—	%	—	%
*	Nippon Aluminum Alkyls - a joint venture with Mitsui Chemicals, Inc. that produces aluminum alkyls	50	%	50	%	50	%
*	Magnifin Magnesiaprodukte GmbH & Co. KG - a joint venture with Radex Heraklith Industriebeteiligung AG that produces specialty magnesium hydroxide products	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 IFP Investissements 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 our assets, liabilities and results of operations for our significant unconsolidated joint ventures presented herein (in thousands):

	December 31,
	2015		2014
Summary of Balance Sheet Information:
Current assets	$	331,630	$	226,392
Noncurrent assets	935,790		181,343
Total assets	$	1,267,420	$	407,735
Current liabilities	$	106,966	$	74,242
Noncurrent liabilities	339,604		63,585
Total liabilities	$	446,570	$	137,827

	Year Ended December 31,
	2015		2014		2013
Summary of Statements of Income Information:
Net sales	$	560,376	$	499,394	$	499,941
Gross profit	$	253,569	$	164,063	$	168,898
Income before income taxes	$	157,501	$	101,983	$	101,680
Net income	$	111,491	$	71,466	$	71,322