CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Common stock	Additional paid-in capital	Retained earnings	Accumulated other comprehensive loss	Noncontrolling interest in subsidiary	Total
Beginning Balance at Dec. 31, 2022	$ 6,101	$ 298,598	$ 300,442	$ (222,991)	$ 20,597	$ 402,747
Net income (loss)			(2,308)		2,890	582
Other comprehensive income (loss), net of tax				3,370	18	3,388
Issuance of NL common stock	2	98				100
Dividends paid			(13,672)			(13,672)
Dividends paid to noncontrolling interest					(1,555)	(1,555)
Other, net		172				172
Ending Balance at Dec. 31, 2023	6,103	298,868	284,462	(219,621)	21,950	391,762
Net income (loss)			67,228		2,033	69,261
Other comprehensive income (loss), net of tax				(3,735)		(3,735)
Issuance of NL common stock	2	98				100
Dividends paid			(36,634)			(36,634)
Dividends paid to noncontrolling interest					(5,000)	(5,000)
Other, net		133			16	149
Ending Balance at Dec. 31, 2024	6,105	299,099	315,056	(223,356)	18,999	415,903
Net income (loss)			(37,826)		2,455	(35,371)
Other comprehensive income (loss), net of tax				27,289		27,289
Issuance of NL common stock	2	118				120
Dividends paid			(27,850)			(27,850)
Dividends paid to noncontrolling interest					(3,447)	(3,447)
Other, net		132			15	147
Ending Balance at Dec. 31, 2025	$ 6,107	$ 299,349	$ 249,380	$ (196,067)	$ 18,022	$ 376,791

Amount after tax and reclassification adjustments of other comprehensive income (loss).

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Equity impact of the value of new stock issued during the period. Includes shares issued in an initial public offering or a secondary public offering.

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Amount of equity (deficit) attributable to parent and noncontrolling interest. Excludes temporary equity.

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