CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS)
Net income (loss)	$ 36,374	$ 668	$ 52,142	$ (7,862)
Other comprehensive income (loss), net of tax:
Currency translation	1,521	(345)	(2,979)	(3,230)
Defined benefit pension plans	378	392	1,135	5,461
Marketable debt securities	(7)	85	15	(84)
Other postretirement benefit plans	(45)	(57)	(137)	(175)
Total other comprehensive income (loss), net	1,847	75	(1,966)	1,972
Comprehensive income (loss)	38,221	743	50,176	(5,890)
Comprehensive income attributable to noncontrolling interest	364	741	1,458	2,039
Comprehensive income (loss) attributable to NL stockholders	$ 37,857	$ 2	$ 48,718	$ (7,929)