CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS)
Net income (loss)	$ 8,453	$ (2,591)	$ 15,768	$ (8,530)
Other comprehensive income (loss), net of tax:
Currency translation	466	(1,219)	(4,500)	(2,885)
Defined benefit pension plans	378	4,676	757	5,069
Marketable debt securities	8	(121)	22	(169)
Other postretirement benefit plans	(45)	(58)	(92)	(118)
Total other comprehensive income (loss), net	807	3,278	(3,813)	1,897
Comprehensive income (loss)	9,260	687	11,955	(6,633)
Comprehensive income attributable to noncontrolling interest	619	525	1,094	1,298
Comprehensive income (loss) attributable to NL stockholders	$ 8,641	$ 162	$ 10,861	$ (7,931)