CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME
Net income	$ 69,261	$ 582	$ 36,456
Other comprehensive income (loss), net of tax:
Currency translation	(8,304)	1,072	(6,956)
Defined benefit pension plans	4,707	2,484	24,611
Marketable debt securities	15	53	(50)
Other postretirement benefit plans	(153)	(221)	160
Total other comprehensive income (loss), net	(3,735)	3,388	17,765
Comprehensive income	65,526	3,970	54,221
Comprehensive income attributable to noncontrolling interest	2,033	2,908	2,612
Comprehensive income attributable to NL stockholders	$ 63,493	$ 1,062	$ 51,609